CN108083579A - Handle the modularization integrated system and technique of non-fermented class bean product production waste water - Google Patents

Abstract

The invention relates to a modular integrated system and process for treating wastewater produced by non-fermented soybean products, including a first-level pretreatment module, a second-level biochemical module and a third-level advanced treatment module. The floating oil separation and sedimentation adjustment pool removes suspended solids and oil slicks and adjusts water quality and water quality; the secondary biochemical module is equipped with anaerobic units and aerobic units to remove main pollutants in wastewater; the tertiary advanced treatment module is equipped with micro sand sedimentation tanks, active Sand filter, dynamic membrane filtration system and ultraviolet disinfection reactor, SS removal and disinfection. For high-concentration non-fermented soybean product production wastewater, process integration and parameterization design are carried out, and different units are selected to operate according to the water quality conditions of the influent. The process of the invention has the characteristics of flexibility, high efficiency, convenience, intelligence and the like, and can ensure the economical, effective and stable operation of waste water treatment facilities.

Description

Modular integrated system and process for treating non-fermented soybean product production wastewater

technical field

The invention relates to the technical field of integrated treatment of high-concentration organic wastewater, in particular to a modular integrated system and process for treating wastewater produced by non-fermented soybean products.

Background technique

In recent years, my country's bean product industry has developed rapidly, and a number of large enterprises in the production and processing of bean products have developed, which has changed the traditional workshop-style production mode. As of 2010, there were more than 2,000 soybean product processing enterprises nationwide, and 117 enterprises with a daily processing capacity of 500 t/d. Among the 12 enterprises with an annual processing capacity of 1.8 million tons worldwide, my country accounted for 6 of them.

Soy products are mainly divided into two categories, one is fermented soy products and the other is non-fermented soy products. Fermented soy products refer to soy products made from soybeans through microbial fermentation, such as soy sauce, fermented bean curd, tempeh, and watercress. Non-fermented soy products refer to soy products made from soybeans and other miscellaneous beans through certain processes, such as tofu, soy milk, and soy milk.

The production process of non-fermented soy products, taking tofu as an example, the process is: primary selection—washing—soaking—refining—boiling—simmering—press filtration—finished product. Wherein water washing to pressure filtration all produce waste water. Non-fermented soybean product wastewater is a kind of high-concentration organic wastewater, which contains a large amount of organic matter such as protein, fat, starch, etc., with high COD and BOD values, and high total nitrogen and ammonia nitrogen. In the yellow pulp water discharged during processing, the solid content is more than 1%, wherein the protein content accounts for about 0.3%, the fat content accounts for about 0.08%, and the reducing sugar content accounts for about 0.15%. In addition, wastewater also contains soybean isoflavones, soybean saponins and other functional components. At present, most enterprises in my country directly discharge yellow pulp water, which wastes resources and pollutes the environment, which is not conducive to clean production and increased soybean processing. added value.

Foreign countries began to study the treatment of soybean product wastewater in the 1960s and applied it to engineering practice. my country also began a large number of researches and applied it to practice in the 1970s. The treatment of soybean product wastewater can be divided into three methods: anaerobic biological treatment, aerobic biological treatment, and anaerobic-aerobic combined treatment process. Among them, the research and application of anaerobic biological process are the most. The main anaerobic treatment processes include: AB (anaerobic filter bed) process, UASB (upflow anaerobic sludge bed) process, AFB (anaerobic fluidized bed) for you process, ABR (anaerobic baffle reaction device) process, two-phase anaerobic treatment process, etc. However, the effluent after anaerobic treatment needs to be supplemented with aerobic treatment in order to meet the discharge standards. The main aerobic treatment processes include AB method, traditional activated sludge method, SBR (sequenced batch activated sludge method), MBR (membrane bioreactor) method. At present, there are many kinds of treatment processes applied to non-fermented soybean product wastewater, and some achievements have been made, but there are still the following problems:

(1) The current water treatment system is difficult to adapt to the situation where the water volume changes greatly. Wastewater from the production of non-fermented soy products has obvious seasonal characteristics, that is, there are so-called low and peak seasons, and some factories even stop production during the off-season, so the discharge of non-fermented soy product production wastewater varies greatly in a year The treatment system currently used is basically designed according to the average water volume or the maximum water volume. The consequence of this design is that when the water volume is low, the system load is insufficient, resulting in a large number of microbial deaths; when the water volume is high, the system load is too high, and the effluent water quality is not up to standard.

(2) The current water treatment system is difficult to adapt to the situation of large changes in water quality. Due to the different production and processing techniques, the wastewater quality of non-fermented soy products is not the same. Even if it is the same enterprise, the wastewater quality of different processing stages is also very different. Sometimes the COD range of wastewater is in the range of 1500-3000, and sometimes it is as high as 8000-20000. Therefore, at the time of design, the same system is generally used to treat wastewater with great changes in water quality. Significant changes in water quality will cause impact loads on the sewage treatment system, causing the system to become unstable and the effluent indicators to deteriorate.

(3) Seasonal wastewater has an impact on the anaerobic system and increases the burden on enterprises. Wastewater from non-fermented soy products is a typical organic wastewater. In general, a combined anaerobic and aerobic treatment system is used in the biochemical stage. However, non-fermented soy products have seasonal characteristics. In the absence of water in winter, the anaerobic system will If it is greatly affected, it may lead to the death of all anaerobic bacteria. In the second year, the anaerobic system will be restarted, which will increase the management burden of the enterprise.

(4) The recycling rate of resources is low. Soy product wastewater contains carbon, nitrogen, phosphorus and trace metal elements required for the production of oxidative yeasts. In the case of sufficient oxygen, yeast can decompose all sugars into carbon dioxide and water, and at the same time produce a large amount of protein-containing mycelium, which can be recycled as feed protein. When the soybean product wastewater is treated by anaerobic method, 0.6-0.8m ³ of biogas can be obtained for every 1kg of COD removed, and the biogas can be used for power generation or fuel gas after treatment. However, in the currently used treatment process, the main emphasis is on the treatment of water, and the recycling rate of this part of resources is very low.

Therefore, the present invention proposes a modular integration process, aiming at the characteristics of non-fermented soy product production wastewater and the problems existing in the current treatment system, screening advanced treatment processes with excellent effect, energy saving and consumption reduction, process coupling integration and parametric design , to achieve process modularization, intelligence and integration.

Contents of the invention

In order to solve the above technical problems, the present invention provides a modular integrated process method for the treatment of non-fermented soybean product production wastewater, including a first-level pretreatment module, a second-level biochemical module and a third-level advanced treatment module, and a first-level pretreatment module The module is equipped with a fine mesh screen and an air flotation oil separation sedimentation adjustment pool to remove suspended solids, oil slicks and adjust water quality and water quality; the secondary biochemical module is equipped with anaerobic units and aerobic units to remove main pollutants in wastewater; the third-level advanced treatment module Set micro-sand sedimentation tank, active sand filter, dynamic membrane filtration system and ultraviolet disinfection reactor to remove SS and disinfect. For high-concentration non-fermented soybean product production wastewater, process integration and parameterization design are carried out, and different units are selected to operate according to the water quality conditions of the influent. The process of the invention has the characteristics of flexibility, high efficiency, convenience, intelligence and the like, and can ensure the economical, effective and stable operation of waste water treatment facilities.

According to the characteristics of production wastewater and the requirements of wastewater treatment process, adhering to the principles of mature and reliable technology, stable operation, convenient maintenance and management, and economical applicability, optimize and integrate non-fermented soybean product production wastewater treatment process, and develop a set of applicable Different water quality operation methods. Soy product wastewater is a kind of wastewater with high organic matter content, the ratio of BOD/COD is as high as 0.55-0.65, and the ratio of C, N, and P is 100:4.7:0.2. The pH is low, and the wastewater basically does not contain toxic and harmful substances. Therefore, soybean wastewater is suitable for biological treatment.

The specific technical scheme is as follows:

A modular integrated system for treating non-fermented soybean product production wastewater, including a first-level pretreatment module, a second-level biochemical module and a third-level advanced treatment module; the first-level pretreatment module is equipped with a fine mesh screen and an air flotation oil separation sedimentation adjustment pool; The secondary biochemical module is equipped with anaerobic unit and aerobic unit. The anaerobic unit includes anaerobic fluidized bed reactor and anaerobic continuous stirring reactor. The aerobic unit includes biological contact oxidation reactor and anoxic-aerobic aerated organism Filter reactor; the three-level advanced treatment module is equipped with micro-sand sedimentation tank, active sand filter, dynamic membrane filtration system and ultraviolet disinfection reactor.

The inlet of the fine mesh sieve of the primary pretreatment module is connected to the inlet of non-fermented bean product production wastewater, and the outlet is connected to the inlet of the air flotation oil separation and sedimentation adjustment pool; the outlet of the air flotation oil separation sedimentation adjustment water pool is connected to the secondary Biochemical module import;

The inlet of the anaerobic unit of the secondary biochemical module is connected to the outlet of the air flotation, oil separation and sedimentation adjustment tank of the primary pretreatment module; the inlet of the anaerobic fluidized bed is connected to the inlet of the anaerobic unit, and the anaerobic fluidized bed The outlet of the bed is connected to the outlet of the anaerobic unit, the inlet of the anaerobic continuous stirring reactor is connected to the inlet of the anaerobic unit, the outlet of the anaerobic continuous stirring reactor is connected to the outlet of the anaerobic unit; the outlet of the anaerobic unit Connect the inlet of the aerobic unit; the outlet of the aerobic unit is connected to the inlet of the three-stage advanced treatment module, the inlet of the biological contact oxidation reaction tank is connected to the inlet of the aerobic unit, and the outlet of the biological contact oxidation reaction tank is connected to the The outlet of the aerobic unit, the inlet of the anoxic-aerobic biological aerated filter is connected to the inlet of the aerobic unit, and the outlet of the anoxic-aerobic biological aerated filter is connected to the outlet of the aerobic unit;

The inlet of the micro-sand sedimentation tank of the third-level advanced treatment module is connected to the outlet of the second-level biochemical treatment module, and the outlet is connected to the inlet of the active sand filter; the outlet of the active sand filter is connected to the inlet of the dynamic membrane filtration reactor ; The outlet of the dynamic membrane filtration system is connected to the inlet of the ultraviolet disinfection reactor; the outlet of the ultraviolet disinfection reactor is connected to the total outlet of the water treatment system;

The anaerobic fluidized bed reactor, anaerobic continuous stirring reactor, biological contact oxidation reaction tank, anoxic-aerobic biological aerated filter and dynamic membrane filtration system are equipped with monitoring devices and electric valves before the import, according to the operating water quality Conditions, automatically select different units to run;

A modular integrated process for treating non-fermented soybean product production wastewater, comprising the following steps:

(1) Start the operation of the first-level pretreatment module, and introduce the non-fermented soy product production wastewater into the total sewage treatment system. The wastewater first passes through a fine mesh screen to remove larger substances in the wastewater;

(2) Start the air flotation oil separation sedimentation adjustment pool to remove oil and suspended solids in the water and adjust the water quality and quantity;

(3) On-line monitoring and analysis of the COD value of _wastewater in the air flotation, oil separation and sedimentation adjustment pool, and the selection of different operating units in combination with the relationship between the actual water _volume Q and the design water volume Q;

(4) When Q _is greater than or _equal to 1/2Q, and COD is greater than or equal to 2000, execute step (5), otherwise execute step (6);

(5) start the anaerobic continuous stirring reactor, remove pollutants in water, and run step (7);

(6) Start the anaerobic fluidized bed reactor to remove pollutants in the water;

(7) On-line monitoring and analysis of the COD value, BOD value and ammonia nitrogen value of the effluent of the anaerobic unit. When COD>500mg/L, or BOD>300mg/L, or ammonia nitrogen>40mg/L, enter step (8), otherwise enter step (10);

(8) Start the anoxic-aerobic biological aerated filter to remove pollutants in the water;

(9) On-line monitoring and analysis of the COD value, BOD value and ammonia nitrogen value of the anaerobic fluidized bed reactor effluent, when COD>100mg/L, or BOD>30mg/L, or when ammonia nitrogen>15mg/L, enter step (10 ), otherwise enter step (11);

(10) start the biological contact oxidation reactor to remove pollutants in the water;

(11) Start the micro-sand sedimentation tank to sediment and discharge the waste water;

(12) Start the active sand filter to filter the waste water;

(13) According to the effluent water quality requirement, when the effluent water quality requirement SS<15mg/L, enter step (14), otherwise enter step (15);

(14) Start the dynamic membrane filtration reactor to filter the waste water;

(15) Start the ultraviolet disinfection reactor to disinfect the waste water.

The design grid size of the fine mesh sieve is 10mm; the air flotation oil separation sedimentation adjustment pool, the design residence time of the reaction zone in the air flotation zone is 5min, the design flow velocity of the contact chamber in the air flotation zone is 0.05m/s, and the design of the contact chamber is 0.05m/s. The residence time is 2 minutes, and the surface load of the separation chamber in the air flotation area is 6~8m ³ /(m ² h); in the oil separation area, the lower baffle plate for 2-stage oil separation, the upper baffle plate for 1-stage oil separation, and 1 set of float skimmer are designed. The oiler and the float oil skimmer are set in front of the upper baffle plate of the oil separator; the sedimentation area includes 2 to 4 sediment buckets, and 1 set of slag discharge system; the designed residence time of the adjustment pool is 12 to 24 hours;

The design load of the anaerobic fluidized bed reactor is 5-8kgCOD/(m ³ ·d), and the design maximum ascending flow rate is 8-10m/h; the design residence time of the anaerobic continuous stirring reactor is 20d; the biological The design BOD load of the contact oxidation reactor is 1.5kg/(m ³ ·d); the anoxic-aerobic biological aerated filter reactor, the designed residence time in the anoxic zone is 3h, and the reflux ratio of the nitrifying liquid is 200%. The design BOD load is 1.8～2.0kgBOD/(m ³ ·d);

The design surface load of the micro-sand sedimentation tank is 10-14m ³ /(m ² h); the design average filtration rate of the active sand filter is 6m/h; the design filtration rate of the dynamic membrane filtration system is 12- 15m/h; Nylon screen, polyester non-woven fabric and diatomite are used as film-forming materials, the size of nylon screen is 1cm╳1cm, the design mesh size is 10 mesh, the size of polyester non-woven fabric is 1cm╳1cm, unit area The mass is 250-300g/m ² , the design permeability of diatomite is 0.15-0.25Darcy, and the mass ratio of nylon mesh, polyester non-woven fabric and diatomite is 10:1:5.

The advantages of this method are:

(1) It is suitable for the treatment of high-concentration wastewater from non-fermented soy product production fields with large changes in water quality and quantity; it can solve the technical problem that non-fermented soy product production wastewater has seasonal characteristics.

(2) The multiple units connected in series form adopted in the present invention can adapt to systems with large changes in water quality and quantity by changing the equipment operating parameters to automatically control the conversion process, while saving energy consumption and expenses in operation; saving floor area to the greatest extent At the same time, the cost is saved; the process combination of the invention has a high degree of modularization, which is conducive to the transformation of technology into integrated equipment and saves space; the process combination technology is advanced and stable up to the standard.

(3) In the first-level pretreatment module of the present invention, the fine mesh screen is installed at the inlet of the air flotation, oil separation and sedimentation adjustment pool to remove suspended matter that may block the water pump unit and pipeline valves, and to ensure the normal operation of subsequent treatment facilities ; The air flotation, oil separation and sedimentation adjustment pool has the functions of removing oil, removing suspended solids and adjusting water quality and quantity.

(4) The anaerobic unit in the secondary biochemical module of the present invention adopts an anaerobic fluidized bed reactor and an anaerobic continuous stirring reactor. The anaerobic fluidized bed reactor is an efficient biofilm treatment method, using materials with large surface areas such as sand as carriers. Anaerobic microorganisms are bound on the surface of sand or other carriers in the form of a film, and they are in a flowing state in the sewage. The microorganisms contact with the organic matter in the sewage, absorb and decompose the organic matter, so as to achieve the purpose of treatment. Compared with traditional anaerobic reactors, anaerobic The fluidized bed reactor has a good removal effect on organic wastewater and low-load organic wastewater under low temperature conditions, so no additional insulation system is needed, and it is more suitable for water treatment systems with large changes in water quality and quantity; anaerobic continuous stirring The reactor is an anaerobic treatment technology that makes the fermentation raw materials and microorganisms in a completely mixed state. The fermentation of the feed liquid and the generation of biogas are completed in a closed tank. A stirring device is installed in the digester to make the fermentation raw materials and microorganisms It is in a completely mixed state, and the feeding method adopts constant temperature continuous feeding or semi-continuous feeding operation. The newly entered raw materials are quickly mixed with all the fermentation broth bacteria in the fermenter due to the stirring effect, so that the concentration of the fermentation substrate is always kept relatively low. The anaerobic continuous stirring reactor can handle raw materials with high suspended solid content. The material in the digester is evenly distributed, avoiding the stratification state, increasing the chance of contact between the material and microorganisms, and utilizing the waste heat generated from biogas to generate electricity for the thermal insulation and heating system outside the reactor. Thermal insulation greatly improves the gas production rate and investment utilization rate, and at the same time enables the reactor to work normally throughout the year, reducing floor space and operating costs.

The aerobic unit in the secondary biochemical module of the present invention adopts a biological contact oxidation reactor and an anoxic-aerobic aerated biological filter tank reactor. Biological contact oxidation reactor is a bioreactor for aerobic treatment of sewage. It is filled with a certain amount of filler, and removes pollutants by using the biofilm grown on the filler and sufficient oxygen supply; anoxic-aerobic aerated biological The filter reactor, on the basis of the traditional biological aerated filter reactor, is equipped with anoxic unit in front, and a nitrification liquid return system is installed behind the biological filter reactor.

(5) The anaerobic process adopted in the secondary biochemical module of the present invention is a quick-start type, and there is no advanced anaerobic process of an external warming system, which is suitable for shutting down when there is no water in winter, and a waste water treatment system that starts quickly after shutting down , and greatly reduce operating costs; the anaerobic continuous stirring reactor system makes full use of the characteristics of non-fermented soybean product production wastewater, generates biogas resources and realizes recycling, improves resource recycling and utilization rates, and reduces operating costs.

(6) In the three-level advanced treatment module of the present invention, the micro-sand precipitation process is a compact, efficient, and flexible rapid precipitation technology, which is characterized in that the micro-sand and polymer flocculant act together to make the pollutants and micro-sand Aggregate into large particle flocs with a diameter of 150 μm or more to accelerate sedimentation and separation, and at the same time combine the principle of inclined plate sedimentation to reduce the area of the sedimentation tank and the sedimentation time, and maintain a good and stable water outlet effect; the active sand filter is a collection of flocculation, clarification, filtration Integrated continuous contact filtration equipment, the purpose is to further realize the separation of sludge and water after sedimentation, and ensure that the effluent SS reaches the standard; the dynamic membrane filtration system uses micro-mesh materials with micron-sized pores to achieve solid-liquid separation, and its retention capacity can reach microfiltration or Ultrafiltration level; ultraviolet disinfection, the use of ultraviolet rays of appropriate wavelengths can destroy the molecular structure of DNA (deoxyribonucleic acid) or RNA (ribonucleic acid) in the cells of microorganisms, causing growth cell death and (or) regenerative cell death, reaching The effect of sterilization and disinfection.

(7) The resource recycling rate of the present invention is high, energy saving and consumption reducing, and environment friendly.

Description of drawings

Fig. 1 is process roadmap of the present invention;

Fig. 2 is a schematic diagram of the air flotation, oil separation and sedimentation adjustment tank in the present invention.

In the figure, 1—first-level pretreatment module; 2—second-level biochemical module; 3—third-level advanced treatment module; 4—regulating pool; 5—inlet pipe; 6—air flotation reaction zone; 7—agitator; 8— Contact chamber; 9—dissolved air water; 10—air flotation separation chamber; 11—oil separation area; 12—oil separation lower baffle; 13—oil separation upper baffle; 14—float oil skimmer; 15—sedimentation area; 16—sediment bucket; 17—slag discharge system; 18—sewage pump; 19—water outlet pipe.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited by the embodiments.

Fig. 1 is a process roadmap of the present invention, as shown in the figure, the modular integrated system for processing non-fermented bean product production wastewater includes a first-level pretreatment module 1, a second-level biochemical module 2 and a third-level advanced treatment module 3; The first stage pretreatment module is equipped with fine mesh screen and air flotation oil separation sedimentation adjustment tank; the second level biochemical module 2 is equipped with anaerobic unit and aerobic unit, and the anaerobic unit includes anaerobic fluidized bed reactor and anaerobic continuous stirring reactor , the aerobic unit includes biological contact oxidation reactor and anoxic-aerobic biological aerated filter reactor; three-level advanced treatment module 3 is equipped with micro-sand sedimentation tank, active sand filter, dynamic membrane filtration system and ultraviolet disinfection reactor .

The inlet of the first-level pretreatment module 1 fine mesh screen is connected to the inlet of non-fermented bean product production wastewater, and the outlet is connected to the inlet of the air flotation oil separation sedimentation adjustment tank; the outlet of the air flotation oil separation sedimentation adjustment tank is connected to the inlet of the secondary biochemical module;

The inlet of the anaerobic unit of the secondary biochemical module 2 is connected to the outlet of the air flotation, oil separation and sedimentation adjustment pool of the first-level pretreatment module; the inlet of the anaerobic fluidized bed is connected to the inlet of the anaerobic unit, and the outlet of the anaerobic fluidized bed is connected to the outlet of the anaerobic unit , the inlet of the anaerobic continuously stirred reactor is connected to the inlet of the anaerobic unit, the outlet of the anaerobic continuously stirred reactor is connected to the outlet of the anaerobic unit; the outlet of the anaerobic unit is connected to the inlet of the aerobic unit; the outlet of the aerobic unit is connected to the inlet of the three-stage advanced treatment module The inlet of the contact oxidation reaction tank is connected to the inlet of the aerobic unit, the outlet of the biological contact oxidation reaction tank is connected to the outlet of the aerobic unit, the inlet of the anoxic-aerobic biological aerated filter is connected to the inlet of the aerobic unit, and the anoxic-aerobic biological aerated filter The outlet is connected to the outlet of the aerobic unit;

The inlet of the micro-sand sedimentation tank of the third-level advanced treatment module 3 is connected to the outlet of the secondary biochemical treatment module, and the outlet is connected to the inlet of the active sand filter; the outlet of the active sand filter is connected to the inlet of the dynamic membrane filtration reactor; The outlet of the dynamic membrane filtration system is connected to the inlet of the ultraviolet disinfection reactor; the outlet of the ultraviolet disinfection reactor is connected to the total outlet of the water treatment system;

Anaerobic fluidized bed reactors, anaerobic continuous stirring reactors, biological contact oxidation reaction tanks, anoxic-aerobic aerated biological filters and dynamic membrane filtration systems are equipped with monitoring devices and electric valves before the import. According to the operating water quality conditions, Automatic selection of different units to run.

A modular integrated process for treating non-fermented soybean product production wastewater, comprising the following steps:

(1) Start the operation of the first-level pretreatment module, and introduce the non-fermented soy product production wastewater into the total sewage treatment system. The wastewater first passes through a fine mesh screen to remove larger substances in the wastewater;

(2) Start the air flotation oil separation sedimentation adjustment pool to remove oil and suspended solids in the water and adjust the water quality and quantity;

(3) On-line monitoring and analysis of the COD value of _wastewater in the air flotation, oil separation and sedimentation adjustment pool, and the selection of different operating units in combination with the relationship between the actual water _volume Q and the design water volume Q;

(4) When Q _is greater than or _equal to 1/2Q, and COD is greater than or equal to 2000, execute step (5), otherwise execute step (6);

(5) start the anaerobic continuous stirring reactor, remove pollutants in water, and run step (7);

(6) Start the anaerobic fluidized bed reactor to remove pollutants in the water;

(7) On-line monitoring and analysis of the COD value, BOD value and ammonia nitrogen value of the effluent of the anaerobic unit. When COD>500mg/L, or BOD>300mg/L, or ammonia nitrogen>40mg/L, enter step (8), otherwise enter step (10);

(8) Start the anoxic-aerobic biological aerated filter to remove pollutants in the water;

(9) On-line monitoring and analysis of the COD value, BOD value and ammonia nitrogen value of the anaerobic fluidized bed reactor effluent, when COD>100mg/L, or BOD>30mg/L, or when ammonia nitrogen>15mg/L, enter step (10 ), otherwise enter step (11);

(10) start the biological contact oxidation reactor to remove pollutants in the water;

(11) Start the micro-sand sedimentation tank to sediment and discharge the waste water;

(12) Start the active sand filter to filter the waste water;

(13) According to the effluent water quality requirement, when the effluent water quality requirement SS<15mg/L, enter step (14), otherwise enter step (15);

(14) start the dynamic membrane filtration reactor to filter the waste water;

(15) Start the ultraviolet disinfection reactor to disinfect the waste water.

Example 1:

In this embodiment, the modularized integrated process system and method shown in Figure 1 are used to treat the wastewater of a non-fermented bean product processing factory in Shenyang. During the treatment process: the designed mesh size of the fine mesh screen is 10 mm; Settling adjustment pool, the design residence time of the reaction zone in the air flotation area is 5min, the design flow velocity of the contact chamber in the air flotation area is 0.05m/s, the design residence time of the contact chamber is 2min, and the surface load of the separation chamber in the air flotation area is 6m ³ /(m ² h); oil separation area, design 2-stage oil separation lower baffle, 1st-stage oil separation upper baffle, 1 float oil skimmer, the float oil skimmer is set in front of the oil separation upper baffle; sedimentation area, including sediment 2 buckets, 1 set of slag discharge system; the design residence time of the regulating pool is 12h;

The design load of the anaerobic fluidized bed reactor is 5kgCOD/(m ³ d), and the design maximum rising velocity is 8m/h; the design residence time of the anaerobic continuous stirring reactor is 20d; the design BOD load of the biological contact oxidation reactor is 1.5kg /(m ³ ·d); anoxic-aerobic biological aerated filter reactor, the design residence time in the anoxic zone is 3h, the reflux ratio of nitrifying liquid is 200%, and the design BOD load is 1.8kgBOD/(m ³ ·d );

The design surface load of the micro-sand sedimentation tank is 10m ³ /(m ² ·h); the design average filtration rate of the active sand filter is 6m/h.

Table 1 shows the water quality testing results of the wastewater treated by the integrated process system and method of this embodiment.

Table 1

project unit flooded out of water COD mg/L 3500 100 BOD mg/L 1500 20 SS mg/L 1000 50 pH 4.5—6.5 6-9 TP mg/L 10 0.5 Ammonia nitrogen mg/L 45 15

Example 2:

In this embodiment, the modularized integrated process system and method shown in Figure 1 are used to treat the wastewater of a non-fermented bean product processing factory in Shenyang. During the treatment process: the designed mesh size of the fine mesh screen is 10 mm; Settling adjustment pool, the design residence time of the reaction zone in the air flotation area is 5min, the design flow velocity of the contact chamber in the air flotation area is 0.05m/s, the design residence time of the contact chamber is 2min, and the surface load of the separation chamber in the air flotation area is 7m ³ /(m ² h); oil separation area, design 2-stage oil separation lower baffle, 1st-stage oil separation upper baffle, 1 float oil skimmer, the float oil skimmer is set in front of the oil separation upper baffle; sedimentation area, including sediment 3 buckets, 1 set of slag discharge system; the design residence time of the regulating pool is 20h;

The design load of the anaerobic fluidized bed reactor is 6kgCOD/(m ³ ·d), and the design maximum rising flow rate is 9m/h; the design BOD load of the biological contact oxidation reactor is 1.5kg/(m ³ ·d);

The design surface load of the micro-sand sedimentation tank is 10-14m ³ /(m ² h); the design average filtration rate of the active sand filter is 6m/h; the design filtration rate of the dynamic membrane filtration system is 13m/h; nylon screen is used , polyester non-woven fabric and diatomite as film-forming material, nylon mesh size is 1cm╳1cm, design mesh size is 10 mesh, polyester non-woven fabric size is 1cm╳1cm, mass per unit area is 270g/m ² , silicon The design permeability of diatomite is 0.2Darcy, and the mass ratio of nylon mesh, polyester non-woven fabric and diatomite is 10:1:5.

Table 2 shows the water quality testing results of the wastewater treated by the integrated process system and method of this embodiment.

Table 2

project unit flooded out of water COD mg/L 1500 100 BOD mg/L 500 20 SS mg/L 600 10 pH 4.5—6.5 6-9 TP mg/L 4.5 0.5 Ammonia nitrogen mg/L 40 15

Example 3:

In this embodiment, the modularized integrated process system and method shown in Figure 1 are used to treat the wastewater of a non-fermented bean product processing factory in Shenyang. During the treatment process: the designed mesh size of the fine mesh screen is 10 mm; Settling adjustment pool, the design residence time of the reaction zone in the air flotation area is 5min, the design flow velocity of the contact chamber in the air flotation area is 0.05m/s, the design residence time of the contact chamber is 2min, and the surface load of the separation chamber in the air flotation area is 8m ³ /(m ² h); oil separation area, design 2-stage oil separation lower baffle, 1st-stage oil separation upper baffle, 1 float oil skimmer, the float oil skimmer is set in front of the oil separation upper baffle; sedimentation area, including sediment 4 buckets, 1 set of slag discharge system; the design residence time of the regulating pool is 24h;

The design load of the anaerobic fluidized bed reactor is 8kgCOD/(m ³ d), and the design maximum rising velocity is 10m/h; the design residence time of the anaerobic continuous stirring reactor is 20d; the design BOD load of the biological contact oxidation reactor is 1.5kg /(m ³ ·d); anoxic-aerobic biological aerated filter reactor, the design residence time in the anoxic zone is 3h, the reflux ratio of nitrifying liquid is 200%, and the design BOD load is 2.0kgBOD/(m ³ ·d );

The design surface load of the micro-sand sedimentation tank is 14m ³ /(m ² h); the design average filtration rate of the active sand filter is 6m/h; the design filtration rate of the dynamic membrane filtration system is 15m/h; nylon screen, polyester Non-woven fabric and diatomaceous earth are used as film-forming materials, the size of nylon mesh is 1cm╳1cm, the design mesh size is 10 mesh, the size of polyester non-woven fabric is 1cm╳1cm, the mass per unit area is 300g/m ² , diatomite The design permeability is 0.25Darcy, and the mass ratio of nylon mesh, polyester non-woven fabric and diatomaceous earth is 10:1:5.

Table 3 shows the water quality testing results of the wastewater treated by the integrated process system and method of this embodiment.

table 3

project unit flooded out of water COD mg/L 2000 100 BOD mg/L 900 20 SS mg/L 650 15 pH 4.5—6.5 6-9 TP mg/L 10 0.5 Ammonia nitrogen mg/L 45 15

Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and those skilled in the art can make the above-mentioned The embodiments are subject to changes, modifications, substitutions and variations.

Claims (6)

1. The modular integrated system for treating non-fermented soybean product production wastewater is characterized in that it includes a first-level pretreatment module, a second-level biochemical module, and a third-level advanced treatment module; the first-level pretreatment module is equipped with a fine mesh screen and air flotation The oil separation sedimentation adjustment pool; the secondary biochemical module is equipped with anaerobic unit and aerobic unit. The anaerobic unit includes anaerobic fluidized bed reactor and anaerobic continuous stirring reactor. The aerobic unit includes biological contact oxidation reactor and anoxic -Aerobic aerated biological filter reactor; the three-stage advanced treatment module is equipped with micro-sand sedimentation tank, active sand filter, dynamic membrane filtration system and ultraviolet disinfection reactor. 2. The modular integrated system for processing non-fermented bean product production wastewater according to claim 1, characterized in that: The inlet of the fine mesh sieve of the primary pretreatment module is connected to the inlet of non-fermented bean product production wastewater, and the outlet is connected to the inlet of the air flotation oil separation and sedimentation adjustment pool; the outlet of the air flotation oil separation sedimentation adjustment water pool is connected to the secondary Biochemical module import; The inlet of the anaerobic unit of the secondary biochemical module is connected to the outlet of the air flotation, oil separation and sedimentation adjustment tank of the primary pretreatment module; the inlet of the anaerobic fluidized bed is connected to the inlet of the anaerobic unit, and the anaerobic fluidized bed The outlet of the bed is connected to the outlet of the anaerobic unit, the inlet of the anaerobic continuous stirring reactor is connected to the inlet of the anaerobic unit, the outlet of the anaerobic continuous stirring reactor is connected to the outlet of the anaerobic unit; the outlet of the anaerobic unit Connect the inlet of the aerobic unit; the outlet of the aerobic unit is connected to the inlet of the three-stage advanced treatment module, the inlet of the biological contact oxidation reaction tank is connected to the inlet of the aerobic unit, and the outlet of the biological contact oxidation reaction tank is connected to the The outlet of the aerobic unit, the inlet of the anoxic-aerobic biological aerated filter is connected to the inlet of the aerobic unit, and the outlet of the anoxic-aerobic biological aerated filter is connected to the outlet of the aerobic unit; The inlet of the micro-sand sedimentation tank of the third-level advanced treatment module is connected to the outlet of the second-level biochemical treatment module, and the outlet is connected to the inlet of the active sand filter; the outlet of the active sand filter is connected to the inlet of the dynamic membrane filtration reactor ; The outlet of the dynamic membrane filtration system is connected to the inlet of the ultraviolet disinfection reactor; the outlet of the ultraviolet disinfection reactor is connected to the total outlet of the water treatment system; The anaerobic fluidized bed reactor, anaerobic continuous stirring reactor, biological contact oxidation reaction tank, anoxic-aerobic biological aerated filter and dynamic membrane filtration system are equipped with monitoring devices and electric valves before the import, according to the operating water quality Conditions, automatically select different units to run. 3. The modular integrated process for treating non-fermented bean product production wastewater is characterized in that it comprises the following steps: (1) Start the operation of the first-level pretreatment module, and introduce the non-fermented soy product production wastewater into the total sewage treatment system. The wastewater first passes through a fine mesh screen to remove larger substances in the wastewater; (2) Start the air flotation oil separation sedimentation adjustment pool to remove oil and suspended solids in the water and adjust the water quality and quantity; (3) On-line monitoring and analysis of the COD value of wastewater in the air flotation, oil separation and sedimentation adjustment pool, and the selection of different operating units in combination with the relationship between the actual water _volume Q and the design water volume Q _; (4) When Q _is greater than or _equal to 1/2Q, and COD is greater than or equal to 2000, execute step (5), otherwise execute step (6); (5) start the anaerobic continuous stirring reactor, remove pollutants in water, and run step (7); (6) Start the anaerobic fluidized bed reactor to remove pollutants in the water; (7) On-line monitoring and analysis of the COD value, BOD value and ammonia nitrogen value of the effluent of the anaerobic unit. When COD>500mg/L, or BOD>300mg/L, or ammonia nitrogen>40mg/L, enter step (8), otherwise enter step (10); (8) Start the anoxic-aerobic biological aerated filter to remove pollutants in the water; (9) On-line monitoring and analysis of the COD value, BOD value and ammonia nitrogen value of the anaerobic fluidized bed reactor effluent, when COD>100mg/L, or BOD>30mg/L, or when ammonia nitrogen>15mg/L, enter step (10 ), otherwise enter step (11); (10) start the biological contact oxidation reactor to remove pollutants in the water; (11) Start the micro-sand sedimentation tank to sediment and discharge the waste water; (12) Start the active sand filter to filter the waste water; (13) According to the effluent water quality requirement, when the effluent water quality requirement SS<15mg/L, enter step (14), otherwise enter step (15); (14) Start the dynamic membrane filtration reactor to filter the waste water; (15) Start the ultraviolet disinfection reactor to disinfect the waste water. 4. A modular integrated process suitable for the treatment of non-fermented bean product production wastewater according to claim 1, characterized in that: the design mesh size of the fine mesh sieve is 10mm; the air flotation oil separation Settling adjustment pool, the design residence time of the reaction zone in the air flotation zone is 5min, the design flow velocity of the contact chamber in the air flotation zone is 0.05m/s, the design residence time of the contact chamber is 2min, and the surface load of the separation chamber in the air flotation zone is 6～8m ³ /( m ² h); in the oil separation area, design the lower baffle for oil separation at the second stage, the upper baffle for oil separation at the first stage, and one float oil skimmer, which is set in front of the upper oil separation baffle; in the sedimentation area, Including 2 to 4 sediment hoppers and 1 set of slag discharge system; the designed residence time of the regulating pool is 12 to 24 hours. 5. A modular integrated process method suitable for non-fermented soy product production wastewater treatment according to claim 1, characterized in that: the design load of the anaerobic fluidized bed reactor is 5-8kgCOD/(m ³ d), the design maximum ascending velocity is 8-10m/h; the design residence time of the anaerobic continuous stirring reactor is 20d; the design BOD load of the biological contact oxidation reactor is 1.5kg/(m ³ ·d); the Referring to the anoxic-aerobic biological aerated filter reactor, the designed residence time in the anoxic zone is 3 hours, the reflux ratio of the nitrifying liquid is 200%, and the designed BOD load is 1.8-2.0kgBOD/(m ³ ·d). 6. A modular integrated process suitable for the treatment of non-fermented bean product production wastewater according to claim 1, characterized in that: the designed surface load of the micro-sand sedimentation tank is 10-14m ³ /(m ² · h); the design average filtration rate of the active sand filter is 6m/h; the design filtration rate of the dynamic membrane filtration system is 12 to 15m/h; nylon screen, polyester non-woven fabric and diatomaceous earth are used as components Membrane material, nylon mesh size is 1cm╳1cm, design mesh size is 10 mesh, polyester non-woven fabric size is 1cm╳1cm, mass per unit area is 250～300g/m ² , design permeability of diatomite is 0.15～0.25 Darcy, the mass ratio of nylon mesh, polyester non-woven fabric and diatomaceous earth is 10:1:5.