CN202543003U - Landfill leachate treatment device - Google Patents

Abstract

The utility model relates to a garbage permeate treatment device, which relates to a waste water treatment device. The treatment device includes a sequentially connected membrane bioreaction system and a disc tube type reverse osmosis system. The membrane bioreaction system includes sequentially connected bioreactors through pipelines, The circulation pump, the biofilm column, the return pipe that returns the concentrated liquid filtered by the biofilm column to the bioreactor is connected between the biofilm column and the bioreactor. The disc tube reverse osmosis system includes a pipeline The raw water tank, raw water pump, sand filter booster pump, sand filter, core filter, high-pressure plunger pump, reverse osmosis membrane column system connected in sequence, the side of the raw water tank is equipped with an acid storage tank, the acid storage tank and the raw water tank An acid pump is installed between the pipelines. The utility model can combine the two treatment methods of MBR and DTRO to treat the landfill leachate, realize the in-situ treatment of the landfill leachate, improve the removal ability of ammonia nitrogen and organic matter, The effluent can stably meet the national first-level discharge standards.

Description

Garbage permeate treatment device

technical field

The utility model relates to a treatment device for high-concentration waste water, in particular to a treatment device for garbage permeate.

Background technique

At present, the waste disposal methods in large and medium-sized cities in China include landfill, composting, and incineration for power generation. Regardless of the treatment method, the leachate produced by the garbage is a headache. Landfill leachate contains a large number of toxic substances, such as heavy metal particles, ammonia nitrogen, and COD (chemical oxygen demand), which make the treatment of landfill leachate very difficult. At present, the commonly used treatment method is to transport to urban sewage treatment plants for treatment, which requires high transportation and treatment costs, and the transfer of pollution sources during transportation will easily cause secondary pollution and other problems. Therefore, the on-site treatment of garbage permeate is of great practical significance.

There are two main types of devices currently used to treat landfill leachate: one is the disc reverse osmosis system (DTRO), and the other is the membrane bioreactor (MBR). As a physical treatment method, the disc tube reverse osmosis system (DTRO) has been widely used in landfills in various places. The characteristic of the (DTRO) treatment process is that it can stably and effectively make the discharged permeate meet the national first-level discharge standard, but the disadvantage is that its concentrated liquid is refilled into the garbage dump, and it can only be eliminated by the biochemical ability of the garbage itself. pollutants, which cannot be eliminated for a long time. Membrane bioreactor (MBR) is an emerging water treatment technology, which is mainly used in the field of urban sewage treatment. Although most of the macromolecular organic matter and large-diameter solid particles have been removed from the liquid, it still has not reached the national first-level discharge standard.

Contents of the invention

The purpose of this utility model is to provide a combination of membrane bioreactor (MBR) and disc tube reverse osmosis system (DTRO) to treat landfill leachate, which can realize the in-situ treatment of landfill leachate , Improve the removal capacity of ammonia nitrogen and organic matter, and the treated effluent can stably meet the national first-level discharge standard for garbage permeate treatment equipment.

The technical scheme adopted by the utility model for achieving the above purpose is: a garbage permeate treatment device, including a sequentially connected membrane bioreaction system and a disc-type reverse osmosis system, the membrane bioreaction system includes sequentially connected biological Reactor, circulation pump, biofilm column, a Roots fan that can supply oxygen to it is connected to one side of the bioreactor, and a filter that filters the biofilm column is also connected between the biofilm column and the bioreactor. The concentrated liquid flows back into the return pipeline in the bioreactor. The disc-type reverse osmosis system includes a raw water tank, a raw water pump, a sand filter booster pump, a sand filter, a core filter, and a high-pressure plunger connected in sequence through the pipeline. Pump, reverse osmosis membrane column system, one side of the raw water tank is connected to an acid storage tank through a pipeline, and an acid adding pump is installed between the pipeline of the acid storage tank and the raw water tank to pump the acid solution in the acid storage tank into the raw water tank. The front end of the raw water tank is also provided with a submersible pump for pumping the filtrate flowing out of the biofilm column into the raw water tank.

Wherein the bioreactor is provided with a stirrer.

Wherein the permeate outlet of the reverse osmosis membrane column system is connected to a clean water tank through a pipeline, and a clean water pump is connected to the pipeline on the back side of the clean water tank outlet, and the output end of the clean water pump can be connected to the input end of the sand filter through water valve control in the front pipe.

Wherein the disc-tube reverse osmosis system further includes a cleaning pump A and a cleaning pump B, and the output ends of the cleaning pump A and the cleaning pump B are respectively connected in parallel to the pipeline in front of the input end of the sand filter booster pump.

Wherein the disc-tube reverse osmosis system further includes a cleaning pump C, and the output end of the cleaning pump C is connected to the pipeline in front of the input end of the core filter.

Wherein the reverse osmosis membrane column system includes at least two groups of parallel reverse osmosis membrane column parts, the first group of reverse osmosis membrane column parts are directly supplied with water by a high-pressure plunger pump, and the pipelines at the input ends of other reverse osmosis membrane column parts are also respectively connected There are online pumps.

Wherein the pipeline at the concentrated solution output end of the reverse osmosis membrane column system is provided with a pressure regulating valve.

Since the waste permeate treatment device of the utility model includes a membrane bioreactor system and a disc-tube reverse osmosis system connected in sequence, the two treatment methods of the membrane bioreactor (MBR) and the disc-tube reverse osmosis system (DTRO) can be combined. The landfill leachate is treated, and the effluent after biochemical treatment is separated from mud and liquid in the biofilm column, and the sludge is returned to the bioreactor, which greatly saves the cost of sludge treatment, and maintains a high concentration of microbial biomass, which can As high as 10g/L or more, the anaerobic tank can easily enter the nitrification state (improve the system's ability to remove ammonia nitrogen and organic matter), and can realize the in-situ treatment of garbage permeate, and the treated effluent can stably meet the national first-level discharge standard.

The garbage permeate treatment device of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Description of drawings

Fig. 1 is a schematic structural view of the garbage permeate treatment device of the present invention.

Explanation of the main components: 1-regulating tank, 2-submersible pump, 3-membrane bioreaction system, 31-Roots blower, 32-bioreactor, 33-agitator, 34-circulating pump, 35-biofilm column , 36-return pipeline, 4-disc reverse osmosis system, 401-submersible pump, 402-raw water tank, 403-acid pump, 404-acid storage tank, 405-raw water pump, 406-clean water tank, 407-clear Water pump, 408-the first group of reverse osmosis membrane column parts, 409-the second group of reverse osmosis membrane column parts, 410-online pump, 411-pressure regulating valve, 412-cleaning pump A, 413-cleaning pump B, 414-sand Filter booster pump, 415-sand filter, 416-cleaning pump C, 417-core filter, 418-high pressure plunger pump, 5-concentrate storage tank.

Detailed ways

As shown in FIG. 1 , the garbage permeate treatment device of the present invention includes a membrane bioreaction system 3 and a disc-tube reverse osmosis system 4 connected in sequence.

The membrane bioreaction system 3 includes a bioreactor 32, a circulation pump 34, and a biofilm column 35 connected in sequence through pipelines. One side of the bioreactor 32 is connected with a Roots blower 31 that can supplement oxygen therein. A stirrer 33 is provided in the device 32, and the stirrer 33 can fully stir the permeate in the bioreactor 32 to make it fully react, and a filter after the bio-model column is also connected between the bio-model column and the bioreactor 32 The concentrate flows back into the return line in the bioreactor 32 .

The disc-tube reverse osmosis system 4 includes a raw water tank 402, a raw water pump 405, a sand filter booster pump 414, a sand filter 415, a core filter 417, a high-pressure plunger pump 418, and a reverse osmosis membrane column connected sequentially through pipelines. System, one side of the raw water tank 402 is also connected to an acid storage tank 404 through a pipeline, and an acid pump 403 is provided between the acid storage tank 404 and the pipeline of the raw water tank 402 to pump the acid solution in the acid storage tank 404 into the raw water tank 402 The front end of the raw water tank 402 is also provided with a submersible pump 401 for pumping the filtrate flowing out of the biofilm column 35 into the raw water tank 402 . The permeate outlet of the reverse osmosis membrane column system is connected to the clean water tank 406 through the pipeline, and the clean water pump 407 is connected to the pipeline on the back side of the clean water tank 406 outlet, and the output end of the clean water pump 407 can be connected to the sand filter 415 through the control of the water valve In the pipe on the front side of the input. The reverse osmosis membrane column system includes at least two sets of parallel reverse osmosis membrane columns (only two sets of reverse osmosis membrane columns are shown in the figure, but the utility model is not limited to two sets of reverse osmosis membrane columns), the first One group of reverse osmosis membrane column parts 408 is directly supplied with water by a high-pressure plunger pump 418, and the pipeline of the input end of the second group of reverse osmosis membrane column parts 409 is also connected with an online pump 410, and the pipelines of the input ends of other reverse osmosis membrane column parts are also respectively An online pump 410 is connected, and the online pump 410 can effectively maintain the liquid pressure in other reverse osmosis membrane columns. A pressure regulating valve 411 is provided on the pipe at the concentrated solution output end of the reverse osmosis membrane column system. By adjusting the pressure regulating valve 411, the internal pressure of the reverse osmosis membrane column system can be adjusted, and the filtration rate of the reverse osmosis membrane column system can be adjusted by adjusting the pressure. Disc type reverse osmosis system 4 also includes cleaning pump A412, cleaning pump B413 and cleaning pump C416, the output ends of cleaning pump A412 and cleaning pump B413 are respectively connected in parallel to the pipeline on the front side of the input end of sand filter booster pump 414, cleaning The output of the pump C416 is connected into the tubing on the front side of the input of the cartridge filter 417. Cleaning pump A412, cleaning pump B413 and cleaning pump C416 are respectively equipped with containers (not shown in the figure) with cleaning liquid. The input terminals of B413 and cleaning pump C416 are respectively connected to the respective containers containing cleaning liquid, and then the cleaning pump A412, cleaning pump B413 and cleaning pump C416 are started.

When treating the garbage permeate, use the submersible pump 2 to pump the permeate in the adjustment tank 1 into the bioreactor 32. The submersible pump 2 is equipped with a frequency converter so that the flow can be adjusted according to the daily leachate output and the bioreactor. The state of the aerobic microorganisms in 32 miles can set the influent flow rate, and perform PID adjustment on the frequency of the influent pump according to the flow rate. Submersible pump 2 has two parameters that need to be monitored during work, one is motor temperature, and the other is pressure. Once the set value is exceeded, it will alarm. In the pipeline from the pump station to the bioreactor 32, the flow of leachate, Incoming water temperature, PH-value and conductivity, and transmitted to the control system for storage and treatment. Turn on the agitator 33 and the Roots blower 31, and after the permeate is fully reacted in the bioreactor 32, the circulating pump 34 pumps the reacted permeate into the biofilm column 35 for filtration, and the biofilm column 35 filters the permeate. The concentrated liquid flows back into the bioreactor 32 through the return pipe to continue to participate in the biological reaction, and the filtrate filtered by the biofilm column 35 enters the disc-type reverse osmosis system 4 to continue processing, and the submersible pump at the inlet end of the raw water tank 402 transfers the filtrate Pumped into the raw water tank 402. When the filtrate enters the raw water tank 402, sulfuric acid is added from the acid storage tank 404 through the acid pump 403 to adjust the pH value. Both the inlet end of the raw water tank 402 and the raw water tank 402 have pH sensors, and the PLC (not shown in the figure) judges the pH value of the raw water and automatically adjusts the frequency of the acid pump 403 to adjust the amount of acid added, and finally enters the reverse osmosis membrane The pH value of the permeate before the column reaches 6-6.5. The outlet water of the raw water storage tank is supplied by the raw water pump 405 to the sand filter 415, and the booster pump of the sand filter 415 provides pressure for the leachate. The sand filter 415 has pressure sensors at the water inlet and outlet to automatically detect the pressure difference. When the pressure difference exceeds 3bar, the cleaning procedure is performed. The filtration accuracy of the sand filter 415 is 50 μm in diameter. After passing through the sand filter 415, the permeate directly enters the core filter The device 417 provides the last protective barrier for the reverse osmosis membrane column system. The precision of the core filter 417 is 10 μm in diameter, and the leachate passing through the core filter 417 directly enters the high-pressure plunger pump 418, and each high-pressure plunger pump 418 There is a shock absorber (not shown in the figure) at the back, which is used to absorb the pulse generated by the high-pressure plunger pump 418 and provide stable pressure to the reverse osmosis membrane column. The water from the high-pressure plunger pump 418 enters the reverse osmosis membrane column system. The first group of reverse osmosis membrane column components 408 can generate sufficient flow and velocity because the high-pressure plunger pump 418 directly supplies water. Other reverse osmosis membrane column components require an online pump 410 Pressurization is required to provide the necessary flow rate. The outlet water of the reverse osmosis membrane column is divided into two parts, and the permeate is discharged into the clean water tank 406, where the pH is adjusted to neutral and then discharged or used for cleaning of the disc-type reverse osmosis system 4. The output of the clean water pump 407 passes through the water valve Control the pipeline connected to the front side of the input end of the sand filter 415 to clean the sand filter 415, the core filter 417, the high-pressure plunger pump 418, the reverse osmosis membrane column system and other equipment. The pressure regulating valve 411 is used to control the pressure in the reverse osmosis membrane column to produce a clean water recovery rate of about 80%. The concentrated solution is discharged into the concentrated solution storage tank 5, and the concentrated solution is landfilled after coagulation and pressure filtration.

Claims (7)

1. refuse leachate treatment unit; Comprise the membrane bio-reaction system (3) and the disc tube reverse osmosis (dt-ro) system (4) that connect successively; It is characterized in that; Said membrane bio-reaction system (3) comprises bio-reactor (32), recycle pump (34), the microbial film column piece (35) that connects successively through pipeline; Bio-reactor (32) one sides be connected with can be in it roots blower (31) of supplemental oxygen; Also be connected with between biological mould column piece and the bio-reactor (32) the liquid concentrator backspace after the biological mould column piece filtration is flow to the reflux line (36) in the bio-reactor (32); Said disc tube reverse osmosis (dt-ro) system (4) comprises former water pot (402), raw water pump (405), sand filtration topping-up pump (414), sand-bed filter (415), core formula strainer (417), high pressure plunger pump (418), the reverse osmosis membrane column system that connects successively through pipeline; Former water pot (402) one sides also are connected with acid storage tank (404) through pipeline; The pipeline enclosure of acid storage tank (404) and former water pot (402) is provided with the acid solution in the acid storage tank (404) is evacuated to and adds sour pump (403) in the former water pot (402), and former water pot (402) front end also is provided with the effusive filtered liq of microbial film column piece (35) is evacuated to the submersible pump (401) in the former water pot (402).

2. refuse leachate treatment unit as claimed in claim 1 is characterized in that, is provided with whisking appliance (33) in the said bio-reactor (32).

3. refuse leachate treatment unit as claimed in claim 1; It is characterized in that; The liquid outlet that sees through of said reverse osmosis membrane column system has clear water jar (406) through pipe connection; Be connected with fresh water pump (407) on the pipeline of clear water jar (406) exit end rear side, the output terminal of fresh water pump (407) can be communicated in the pipeline of sand-bed filter (415) input terminus front side through water valve control.

4. refuse leachate treatment unit as claimed in claim 1; It is characterized in that; Said disc tube reverse osmosis (dt-ro) system (4) also comprises scavenging pump A (412) and scavenging pump B (413), and the output terminal of scavenging pump A (412) and scavenging pump B (413) is connected to respectively in the pipeline of sand filtration topping-up pump (414) input terminus front side side by side.

5. refuse leachate treatment unit as claimed in claim 1; It is characterized in that; Said disc tube reverse osmosis (dt-ro) system (4) also comprises scavenging pump C (416), and the output terminal of scavenging pump C (416) is connected in the pipeline of core formula strainer (417) input terminus front side.

6. refuse leachate treatment unit as claimed in claim 1; It is characterized in that; Said reverse osmosis membrane column system comprises the reverse osmosis membrane column piece that at least two groups are arranged side by side; First group of reverse osmosis membrane column piece (408) directly supplied water by high pressure plunger pump (418), also is connected with online pump (410) on the pipeline of the input terminus of other reverse osmosis membrane column piece (409) respectively.

7. refuse leachate treatment unit as claimed in claim 1 is characterized in that, the pipeline of the liquid concentrator output terminal of said reverse osmosis membrane column system is provided with pressure regulator valve (411).

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