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CN108996848B - A kind of sewage-treatment plant and method - Google Patents

A kind of sewage-treatment plant and method Download PDF

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Publication number
CN108996848B
CN108996848B CN201811039977.9A CN201811039977A CN108996848B CN 108996848 B CN108996848 B CN 108996848B CN 201811039977 A CN201811039977 A CN 201811039977A CN 108996848 B CN108996848 B CN 108996848B
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sewage
tank
anoxic
clear liquid
aeration
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CN108996848A (en
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杨镒玮
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/281Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/34Treatment of water, waste water, or sewage with mechanical oscillations
    • C02F1/36Treatment of water, waste water, or sewage with mechanical oscillations ultrasonic vibrations
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/722Oxidation by peroxides
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention belongs to sewage treatment fields, specifically disclose a kind of sewage-treatment plant and method, the present invention is by carrying out anoxic adjusting to sewage, anoxic denitrification, aeration, oxidative nitration, precipitating filtering, ultrasonic oxidation, bentonite and composite diatomite processing, aluminium polychloride coagulating sedimentation, the continuous processing of physical absorption, it can be effectively by the nitrogen in sewage, phosphorus element and antibiotic are sufficiently discharged into sewage, and by nitrogen, phosphorus element and antibiotic are effectively removed, realize the harmless treatment to sewage, prevent further pollution of the sewage to existing freshwater resources in short supply.

Description

A kind of sewage-treatment plant and method
Technical field
The present invention relates to sewage treatment field, in particular to a kind of sewage-treatment plant and method.
Background technique
China is very big using water number purpose total amount, but occupancy volume per person is seldom, according to per capita water resource number, Slight water shortage, moderate water shortage, severe water shortage and unusual water shortage can be divided into.China belongs to the country of moderate water shortage.Although China The living standard of the people is become better and better under the economic drive of high speed development, but largely but using welding as cost , for example freshwater resources are contaminated and increasingly severe, or even have part ocean also to receive different degrees of pollution, use The increase of water causes level of ground water also constantly declining, this make people gradually recognize water resource be not it is inexhaustible, It is nexhaustible.
With water resource worsening shortages, the substances such as nitrogen, phosphorus and antibiotic contained in sewage to the pollution of Natural Water so that This is further deteriorated with freshwater resources in short supply;Wherein, eutrophication generates serious harm to water body, and direct result is to cause Some water plants increase sharply, and consume oxygen in water rapidly, cause numerous Shui nationality animals dead due to anoxic, certain shellfishes can The toxin enrichment that some algae are generated, and the mankind often eat these aquatic products, have virtually influenced the body of the mankind again Health.And remaining antibiotic more causes damages to resident's human health and hydro-ecological safety in water source.Therefore, sewage is harmless Change is handled also gradually by the growing interest of people.It goes to denitrogenate in sanitary sewage, the method for the substances such as phosphorus and antibiotic mainly has Bioanalysis and chemical method, but biological phosphate-eliminating is sensitive to influent quality and other technological parameters, is relatively easy in treatment process It is influenced by other factors, causes the stability of dephosphorization poor.
Currently, the purifying treatment method of eutrophication and antibiotic for water body have been relatively mature, but due to dirt The features such as the moisture content of water is high, and volume is big, bring bigger difficulty for stacking, transport and subsequent processing, lead to the improvement of sewage Have become the problem of water environment treatment.Meanwhile treated how sewage is utilized, and is allowed to no longer become pollution, is current The hot and difficult issue of research.
Summary of the invention
A kind of sewage-treatment plant and method proposed the purpose of the present invention is to solve background technique, by dirt Water carries out anoxic adjusting, anoxic denitrification, aeration, oxidative nitration, precipitating filtering, ultrasonic oxidation, bentonite and composite diatomite Processing, aluminium polychloride coagulating sedimentation, physical absorption continuous processing, can be effectively by nitrogen, phosphorus element and the antibiosis in sewage Plain sufficiently release is effectively removed into sewage, and by nitrogen, phosphorus element and antibiotic, realizes the harmless treatment to sewage, Prevent sewage from having broad application prospects to the further pollution of existing freshwater resources in short supply.
To achieve the goals above, present invention employs following technical solutions:
A kind of sewage-treatment plant, it is characterised in that: including adjusting tank, the anti-nitre of anoxic by the sequentially connected anoxic of pipeline Change tank, aeration tank, oxidator, sedimentation basin, filtering ponds, ultrasonic treatment oxidation tank, blending tank, settling tank, adsorption tower;It is lacked described Oxygen denitrification tank is internally provided with motor and agitating device, is provided with airlift pump and stripping tube outside the anoxic denitrification tank Road, the air demand by controlling the airlift pump quantitatively promote the sewage in the anoxic denitrification tank into the aeration tank; The aeration tank is internally provided with hydrolysis blender and aerator, the uniform stomata that the aerator is arranged by surface to Oxygen is supplied in the aeration tank, the hydrolysis blender passes through the motor driven agitating shaft being arranged at the top of the aeration tank and turns It is dynamic;The oxidator bottom is provided with evenly arranged drainage hole, and the drainage hole is connect with drainpipe, and the drainpipe passes through Water pump is connect with the anoxic denitrification tank;It is provided with the detour baffle for stopping drainage flow in the sedimentation basin, sewage and mixed It closes liquid and the anoxic adjusting tank is back to by pipeline;The both sides external of the ultrasonic treatment oxidation tank is provided with ultrasonic wave Device is provided with solution adding mouth at the top of the ultrasonic treatment oxidation tank;There are two agitating device, institutes for setting in the blending tank Stating agitating device includes agitating shaft and stirring blade, has the paddle by the motor driven belts being arranged at the top of the blending tank The agitating shaft of piece rotates, and one lateral roof of blending tank is provided with adding mouth;The settling tank is internally provided with spray thrower, Reagent is added into the settling tank by the spray thrower, the precipitating pot bottom is provided with motor-driven agitating shaft, institute It states and is provided with filter in the middle part of settling tank side, the clear liquid through the filter passes through pipeline to the adsorption tower;Institute It states and is filled with adsorbent in adsorption tower, the clear water after the adsorbent adsorption treatment is discharged by pipeline.
As further restriction of the invention, anoxic denitrification pot sidewall is provided with biologic packing material, utilizes the life Pollutant biochemical in the microorganism initial breakdown removal sewage of apposition growth on object filler.
As further restriction of the invention, it is provided with three layer filtration layer in filtering ponds, from top to bottom successively are as follows: be used for Filter the first filter layer of bulky grain, the filter bed of essence of filter small particles and the ultrafiltration layer for filtering molecule;It is arranged in the first filter layer There is quartz sand, soft material fiber and particulate filler are provided in the filter bed of essence, is provided with ceramic filter plate in the ultrafiltration layer.
As further restriction of the invention, oxidator includes cabinet, horizontal baffle, micropore aeration pipe, exhaust level, electricity Machine, retarder and aerator;The horizontal baffle is set in the middle part of cabinet, for realizing the laminar flow of sewage;The motor, Retarder and the aerator are all set in the cabinet top, and the aerator passes through revolution several ceramic disks of axis connection, The rotating shaft rotation is driven to drive the ceramic disk rotation by the motor and retarder;The horizontal baffle side is set Exhaust level is set, the gas after aeration reaction is discharged;The bottom of box is arranged several micropore aeration pipes, in Xiang Suoshu oxidator Input oxygen.
As further restriction of the invention, horizontal baffle width is equal with box width, the horizontal baffle length More slightly shorter than cabinet length, there are water space is crossed between the horizontal baffle both ends and cabinet, sewage is in cabinet around described Horizontal baffle obstructs to be circulated in the vertical cyclic loop to be formed.
The oxidator of above structure through the invention considerably increases oxidation by overlapping to oxide regions The depth in region, saves system footprint to the greatest extent, oxidator due to being provided with horizontal baffle in centre, avoid because The problem for the bottom velocity deficiency that depth is too big and causes;Oxidator of the invention simultaneously provides two kinds of oxygen lead-in modes, can With the oxygen-supplying amount of revolving speed and bottom micropore aeration pipe by adjusting ceramic disk, the dissolved oxygen flexibly controlled in oxidator is dense Degree;Furthermore, it is possible to increase agitating device in bottom as needed, the more flexible intracorporal water velocity of adjusting tank is prevented miscellaneous Matter deposition.
Meanwhile the invention also discloses a kind of sewage water treatment methods, method includes the following steps:
1) sewage is imported the anoxic by pipeline to adjust in tank, sewage is adjusted in tank in the anoxic by can in sewage What the carbon source in biological decomposition organic matter released, and preformed precipitate is carried out to the impurity in sewage, it is passed through after stopping 10~12h In the anoxic denitrification tank;
2) the microorganism initial breakdown of apposition growth on the biologic packing material on the anoxic denitrification pot sidewall is utilized The pollutant in sewage is removed, while using the organic matter in sewage as denitrifying carbon source, to oxidator reflux Nitrification liquid carries out denitrification denitrogenation;Meanwhile the air demand by controlling the airlift pump quantifies the sewage in lift pot to described Aeration tank buffers the fluctuation of sewage quality water;
3) solution after denitrification is imported in the aeration tank and carries out Air Exposure, be aerated 3~5h, initial breakdown sewage In organic matter, and by mineralized nitrogen be nitrate nitrogen;
4) nitration reaction is carried out to sewage by the oxidator, is further nitrate nitrogen by ammonium oxidation, meanwhile, pass through Nitrification liquid is flowed back into the anoxic denitrification tank by the pipeline of the oxidator bottom setting, makes nitrification liquid in the anti-nitre of the anoxic Change and the total nitrogen that anti-nitration reaction is gone in water removal occurs in tank;
5) sewage after denitrogenating is passed through 2~3h of standing in the sedimentation basin, sewage and mixed liquor is back to described lack Oxygen adjusts in tank and carries out circular treatment again, and the clear liquid after precipitating is passed through in the filtering ponds and is filtered, and removes residual in clear liquid The impurity stayed;
6) filtered clear liquid is imported in the ultrasonic treatment oxidation tank, clear liquid is ultrasonically treated, be ultrasonically treated After a period of time, aqueous hydrogen peroxide solution is added into tank, the phosphorus element in clear liquid aoxidizes under the action of aqueous hydrogen peroxide solution;
7) clear liquid after ultrasound, oxidation is imported in the blending tank, bentonite and diatom earth mixtures is added into tank, And mechanical stirring is carried out, mixing speed is 20~30r/min, and after stirring a period of time, reaction solution stops 5h;
8) supernatant in the blending tank is imported in the settling tank, pH value regulation is added in Xiang Suoshu settling tank Agent, adjusting the settling tank pH is 8.5~9.5;Then polymeric aluminum chlorides solution is sprayed into the blending tank, and controls stirring Speed is 300~500 r/min, and the clear liquid after reaction is filtered by the filter of the settling tank side;
9) it is passed through in the adsorption tower through precipitating, filtered clear liquid, clear liquid is carried out at absorption by the adsorbent Reason, can be discharged after processing.
It has been found that be bonded due to being formed between the part phosphorus element meeting contained in sewage and organic matter, and antibiotic Natural degradation speed is slower.In order to weaken the bonding action between solid phase phosphorus element and organic matter, convenient for being fully dissolved out for phosphorus element, together The degradation speed of antibiotic, the clear liquid after denitrification, oxidation processes is ultrasonically treated in Shi Tigao sewage mixed liquor, Phosphorus element and the direct bonding action of organic matter can be weakened, be easy to improve subsequent oxidation release phosphorus and convert the effect of phosphorus;Meanwhile Ultrasonic treatment, which generates high temperature pyrolysis effect and mechanical effect of ultrasound and ultrasonic wave to organic matter in clear liquid, makes polarity point in liquid Son generates high speed rotation and generates fuel factor, the activation energy of reaction and the chemical bond strength of molecule is reduced, so as to accelerate liquid The degradation of antibiotic in body.
In clear liquid after sonicated and oxidation, phosphorus element is released effectively, and antibiotic initial breakdown, at this time The removal that phosphorus element can be carried out to clear liquid is handled.
It is usually both individually to make although bentonite and diatomite can be used for the purified treatment to water body With.Compound is made by the proportion to bentonite and diatomite, can be obviously improved to phosphorus element in mud mixed liquid and antibiosis Effective removing of element.
From the figure 3, it may be seen that the removal effect of total phosphorus is preferable when bentonite and diatomite mass ratio are 60%:40%, it is subsequent Processing processing provides preferable basis.
Also contain minimal residue object in treated clear liquid, in order to sufficiently remove above-mentioned residue, to after processing Clear liquid in pH value adjusting control agent is added, adjusting pH is 8.5~9.5, and polyaluminium is then sprayed into settling tank by spray thrower Aluminum solutions react to form coagulating sedimentation, and control stirring for tank base blender by aluminium polychloride with phosphorus element in mixed liquor Mixing speed is 300~500r/min.
Due to directly adding aluminium polychloride into sewage and carrying out flocculation dephosphorization, can not only deteriorate its settling property, also can Reduce dephosphorization efficiency.Different pH value are affected to flocculation precipitation reaction, pass through the continuous research to reaction rate, application People's discovery, as pH < 9, as pH is increased, tp removal rate is increased;As pH > 9, pH is further increased, tp removal rate reduces, But reduce amplitude very little.In pH<6 and pH>10, pH is little to the flocculation sedimentation influential effect of aluminium polychloride.Therefore, pH is Dephosphorization efficiency highest of the aluminium polychloride to clear liquid when 9.
In addition, suitable speed of agitator can make aluminium polychloride rapidly diffuse into the top of clear liquid, temperature in clear liquid and Concentration more evenly, promotes aluminium ion to contact to form precipitating dephosphorization with phosphorus, but speed of agitator crosses conference and smashes wadding body, hinders precipitating It is formed, reduces tp removal rate.By the continuous research to reaction rate, it has been found that mixing speed is in 50~500 r/min In the range of, with the increase of mixing speed, tp removal rate is slightly increased, but it is little to influence variation.
By analysis, Al/P ion molar concentration rate, pH value and speed of agitator during aluminium polychloride dephosphorization in clear liquid To the function and effect of phosphor-removing effect, the impact effect size of clear liquid dephosphorization process condition be Al/P ion molar concentration rate > pH value > Mixing speed.
As the concentration of phosphorus element in clear liquid gradually decreases, the phosphorus element of low concentration can not the reaction was continued is purged, this hair The bright clear liquid by after aluminium polychloride flocculation sedimentation is passed through in adsorption tower after being filtered, can be into one using adsorbent Step adsorbs phosphorus element, and can effectively remove to antibiotic remaining in sewage.
As further restriction of the invention, parameter is ultrasonically treated in step 6) are as follows: 60~120W of power, frequency 20~ 40MHz;The volume ratio of aqueous hydrogen peroxide solution and clear liquid is (5~10): 100;The mass fraction of aqueous hydrogen peroxide solution is 20% ~30%.
It is limited as of the invention further, bentonite and diatomite in bentonite and diatom earth mixtures in step 7) Mass ratio be 60%:40%, bentonite and diatom earth mixtures dosage are 500mg/L, stir 1-2d, are stopped after stir 5h。
As further restriction of the invention, polymeric aluminum chlorides solution is added into settling tank in step 8), controls institute The molar concentration rate for stating Al/P ion in settling tank is 2.4~2.7:1.
As seen from Figure 4, the ferric ion molar concentration of iron-based material under the same conditions, the adsorbent of preparation Sequence to the removal rate of Levofloxacin and Ciprofloxacin is ferric nitrate highest, is secondly ferric sulfate, and worst is iron chloride.Cause This, in order to improve effective removing to residual antibiotic in clear liquid, the iron-based material in selected adsorbent is carried out using ferric nitrate Preparation.
Limited as of the invention further, adsorbent the preparation method is as follows: take 5 grams of biomass carbons, be added ultrapure Water impregnates and ultrasound 10min, dries to constant weight at washing 3 times, 110 DEG C repeatedly;To by being added in pretreated biomass carbon The concentration of 20mL is the iron nitrate solution of 1mol/L, after stirring for 24 hours at room temperature, is transferred in evaporator, heating temperature is set as 12h is reacted under 60 DEG C and vacuumized conditions, solid material is cooling after taking out, and is washed with deionized water, and is dried in vacuo at 25 DEG C 24 h。
The beneficial effects of the present invention are:
1, the present invention is by effectively combining hypoxia response and aerobic reaction, by the way of aerobic after first anoxic, setting Two sections of hypoxia responses adjust degradation sewage, and sewage is adjusted in tank and anoxic denitrification tank in anoxic longer residence time, energy The organic concentration of sewage is enough effectively reduced.
2, biologic packing material is set in anoxic denitrification tank, utilizes the microorganism initial breakdown of apposition growth on biologic packing material The pollutant in sewage is removed, while making full use of the organic matter in sewage as denitrifying carbon source, at through aerobic nitrification The reflux nitrification liquid of reason carries out denitrification denitrogenation.
3, the oxidator of above structure of the present invention considerably increases zoneofoxidation by overlapping to oxide regions The depth in domain, saves system footprint to the greatest extent;Oxidator of the invention provides two kinds of oxygen lead-in modes simultaneously, can be with By adjusting the revolving speed of ceramic disk and the oxygen-supplying amount of bottom micropore aeration pipe, the dissolved oxygen concentration in oxidator is flexibly controlled; Furthermore, it is possible to increase agitating device in bottom as needed, the more flexible intracorporal water velocity of adjusting tank prevents impurity heavy Product.
4, the clear liquid after denitrification, oxidation processes is ultrasonically treated, it is direct with organic matter that phosphorus element can be weakened Bonding action, be easy to improve subsequent oxidation release phosphorus and convert phosphorus effect;Meanwhile the preliminary of antibiotic in liquid can be accelerated Degradation.
5, compound is made by the proportion to bentonite and diatomite, can be obviously improved to phosphorus element in sewage mixed liquor With effective elimination effect of antibiotic.
6, it by addition aluminium polychloride, reacts to form coagulating sedimentation and can further remove mixing with phosphorus element in mixed liquor The phosphorus element of minimal residue in liquid.
7, by treated, mixed liquor is passed through in adsorption tower the present invention, can be further to free state and solid phase using adsorbent Phosphorus element is adsorbed, and can overcome the problems, such as that phosphorus element is easy to be lost low with recycling efficiency in liquid phase.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of sewage-treatment plant proposed by the present invention.
Fig. 2 is the structural schematic diagram of oxidator in a kind of sewage-treatment plant proposed by the present invention.
Fig. 3 is that bentonite and diatomite different quality match the comparison diagram for comparing phosphor-removing effect influence.
Fig. 4 is the comparison diagram that different iron-based materials influence antibiotic in adsorbent removal liquid.
Specific embodiment
It is next combined with specific embodiments below that the present invention is further described.
Referring to Fig.1-2, a kind of sewage-treatment plant, including tank, the anti-nitre of anoxic are adjusted by the sequentially connected anoxic of pipeline Change tank, aeration tank, oxidator, sedimentation basin, filtering ponds, ultrasonic treatment oxidation tank, blending tank, settling tank, adsorption tower;It is lacked described Oxygen denitrification tank is internally provided with motor and agitating device, is provided with airlift pump and stripping tube outside the anoxic denitrification tank Road, the air demand by controlling the airlift pump quantitatively promote the sewage in the anoxic denitrification tank into the aeration tank; The aeration tank is internally provided with hydrolysis blender and aerator, the uniform stomata that the aerator is arranged by surface to Oxygen is supplied in the aeration tank, the hydrolysis blender passes through the motor driven agitating shaft being arranged at the top of the aeration tank and turns It is dynamic;The oxidator bottom is provided with evenly arranged drainage hole, and the drainage hole is connect with drainpipe, and the drainpipe passes through Water pump is connect with the anoxic denitrification tank;It is provided with the detour baffle for stopping drainage flow in the sedimentation basin, sewage and mixed It closes liquid and the anoxic adjusting tank is back to by pipeline;The both sides external of the ultrasonic treatment oxidation tank is provided with ultrasonic wave Device is provided with solution adding mouth at the top of the ultrasonic treatment oxidation tank;There are two agitating device, institutes for setting in the blending tank Stating agitating device includes agitating shaft and stirring blade, has the paddle by the motor driven belts being arranged at the top of the blending tank The agitating shaft of piece rotates, and one lateral roof of blending tank is provided with adding mouth;The settling tank is internally provided with spray thrower, Reagent is added into the settling tank by the spray thrower, the precipitating pot bottom is provided with motor-driven agitating shaft, institute It states and is provided with filter in the middle part of settling tank side, the clear liquid through the filter passes through pipeline to the adsorption tower;Institute It states and is filled with adsorbent in adsorption tower, the clear water after the adsorbent adsorption treatment is discharged by pipeline.
Wherein, anoxic denitrification pot sidewall is provided with biologic packing material, using on the biologic packing material apposition growth it is micro- Biochemical pollutant in biological initial breakdown removal sewage.
Wherein, three layer filtration layer is provided in filtering ponds, from top to bottom successively are as follows: for filter bulky grain first filter layer, The filter bed of essence of filter small particles and the ultrafiltration layer of filtering molecule;Quartz sand, the filter bed of essence are provided in the first filter layer In be provided with soft material fiber and particulate filler, be provided with ceramic filter plate in the ultrafiltration layer.
Wherein, oxidator specifically include cabinet, horizontal baffle 4, micropore aeration pipe 3, exhaust level 5, motor 2, retarder and Aerator 1;Horizontal baffle 4 is set in the middle part of cabinet, for realizing the laminar flow of sewage;Motor, retarder and aerator 1 are set It is placed in cabinet top, aerator drives rotating shaft rotation by revolution several ceramic disks of axis connection, by motor and retarder Drive ceramic disk rotation;Exhaust level 5 is arranged in 4 side of horizontal baffle, and the gas after aeration reaction is discharged;Bottom of box setting Several micropore aeration pipes 3, oxygen is inputted into oxidator.
Wherein, 4 width of horizontal baffle is equal with box width, and 4 baffle length of horizontal flow is more slightly shorter than cabinet length, horizontal There are water space is crossed between baffle both ends and cabinet, sewage obstructs to be formed vertical cyclic annular time in cabinet around horizontal baffle It is circulated in road.
A kind of sewage water treatment method, method includes the following steps:
1) sewage is imported the anoxic by pipeline to adjust in tank, sewage is adjusted in tank in the anoxic by can in sewage What the carbon source in biological decomposition organic matter released, and preformed precipitate is carried out to the impurity in sewage, it is passed through after stopping 10~12h In the anoxic denitrification tank;
2) the microorganism initial breakdown of apposition growth on the biologic packing material on the anoxic denitrification pot sidewall is utilized The pollutant in sewage is removed, while using the organic matter in sewage as denitrifying carbon source, to oxidator reflux Nitrification liquid carries out denitrification denitrogenation;Meanwhile the air demand by controlling the airlift pump quantifies the sewage in lift pot to described Aeration tank buffers the fluctuation of sewage quality water;
3) solution after denitrification is imported in the aeration tank and carries out Air Exposure, be aerated 3~5h, initial breakdown sewage In organic matter, and by mineralized nitrogen be nitrate nitrogen;
4) nitration reaction is carried out to sewage by the oxidator, is further nitrate nitrogen by ammonium oxidation, meanwhile, pass through Nitrification liquid is flowed back into the anoxic denitrification tank by the pipeline of the oxidator bottom setting, makes nitrification liquid in the anti-nitre of the anoxic Change and the total nitrogen that anti-nitration reaction is gone in water removal occurs in tank;
5) sewage after denitrogenating is passed through 2~3h of standing in the sedimentation basin, sewage and mixed liquor is back to described lack Oxygen adjusts in tank and carries out circular treatment again, and the clear liquid after precipitating is passed through in the filtering ponds and is filtered, and removes residual in clear liquid The impurity stayed;
6) filtered clear liquid is imported in the ultrasonic treatment oxidation tank, clear liquid is ultrasonically treated, be ultrasonically treated After a period of time, aqueous hydrogen peroxide solution is added into tank, the phosphorus element in clear liquid aoxidizes under the action of aqueous hydrogen peroxide solution;
7) clear liquid after ultrasound, oxidation is imported in the blending tank, bentonite and diatom earth mixtures is added into tank, And mechanical stirring is carried out, mixing speed is 20~30r/min, and after stirring a period of time, reaction solution stops 5h;
8) supernatant in the blending tank is imported in the settling tank, pH value regulation is added in Xiang Suoshu settling tank Agent, adjusting the settling tank pH is 8.5~9.5;Then polymeric aluminum chlorides solution is sprayed into the blending tank, and controls stirring Speed is 300~500 r/min, and the clear liquid after reaction is filtered by the filter of the settling tank side;
9) it is passed through in the adsorption tower through precipitating, filtered clear liquid, clear liquid is carried out at absorption by the adsorbent Reason, can be discharged after processing.
Wherein, parameter is ultrasonically treated in step 6) are as follows: 60~120W of power, 20~40MHz of frequency;Aqueous hydrogen peroxide solution with The volume ratio of clear liquid is (5~10): 100;The mass fraction of aqueous hydrogen peroxide solution is 20%~30%.
Wherein, the mass ratio of bentonite and diatomite is 60%:40% in bentonite and diatom earth mixtures in step 7), Bentonite and diatom earth mixtures dosage are 500mg/L, stir 1-2d, stop 5h after having stirred.
Wherein, polymeric aluminum chlorides solution is added into settling tank in step 8), control Al/P ion in the settling tank Molar concentration rate is 2.4~2.7:1.
Wherein, adsorbent the preparation method is as follows: take 5 grams of biomass carbons, ultrapure water is added and impregnates and ultrasound 10min, instead After backwashing is washed 3 times, is dried to constant weight at 110 DEG C;The nitre for being 1mol/L to the concentration by 20mL is added in pretreated biomass carbon Sour ferrous solution after stirring for 24 hours at room temperature, is transferred in evaporator, and heating temperature is set as reacting under 60 DEG C and vacuumized conditions 12h, solid material is cooling after taking out, and is washed with deionized water, and 24 h are dried in vacuo at 25 DEG C.
The present invention is by carrying out anoxic adjusting, anoxic denitrification, aeration, oxidative nitration, precipitating filtering, ultrasonic oxygen to sewage Change, bentonite and composite diatomite processing, aluminium polychloride coagulating sedimentation, physical absorption continuous processing, can effectively by Nitrogen, phosphorus element and antibiotic in sewage are sufficiently discharged into sewage, and nitrogen, phosphorus element and antibiotic are effectively removed, It realizes the harmless treatment to sewage, prevents further pollution of the sewage to existing freshwater resources in short supply.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto, Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.

Claims (10)

1. a kind of sewage-treatment plant, it is characterised in that: including adjusting tank, anoxic denitrification by the sequentially connected anoxic of pipeline Tank, aeration tank, oxidator, sedimentation basin, filtering ponds, ultrasonic treatment oxidation tank, blending tank, settling tank, adsorption tower;In the anoxic Denitrification tank is internally provided with motor and agitating device, is provided with airlift pump and stripping tube outside the anoxic denitrification tank Road, the air demand by controlling the airlift pump quantitatively promote the sewage in the anoxic denitrification tank into the aeration tank; The aeration tank is internally provided with hydrolysis blender and aerator, the uniform stomata that the aerator is arranged by surface to Oxygen is supplied in the aeration tank, the hydrolysis blender passes through the motor driven agitating shaft being arranged at the top of the aeration tank and turns It is dynamic;The oxidator bottom is provided with evenly arranged drainage hole, and the drainage hole is connect with drainpipe, and the drainpipe passes through Water pump is connect with the anoxic denitrification tank;It is provided with the detour baffle for stopping drainage flow in the sedimentation basin, sewage and mixed It closes liquid and the anoxic adjusting tank is back to by pipeline;The both sides external of the ultrasonic treatment oxidation tank is provided with ultrasonic wave Device is provided with solution adding mouth at the top of the ultrasonic treatment oxidation tank;There are two agitating device, institutes for setting in the blending tank Stating agitating device includes agitating shaft and stirring blade, has the paddle by the motor driven belts being arranged at the top of the blending tank The agitating shaft of piece rotates, and one lateral roof of blending tank is provided with adding mouth;The settling tank is internally provided with spray thrower, Reagent is added into the settling tank by the spray thrower, the precipitating pot bottom is provided with motor-driven agitating shaft, institute It states and is provided with filter in the middle part of settling tank side, the clear liquid through the filter passes through pipeline to the adsorption tower;Institute It states and is filled with adsorbent in adsorption tower, the clear water after the adsorbent adsorption treatment is discharged by pipeline.
2. a kind of sewage-treatment plant according to claim 1, it is characterised in that: the anoxic denitrification pot sidewall setting There is biologic packing material, biochemical pollution in the microorganism initial breakdown removal sewage using apposition growth on the biologic packing material Object.
3. a kind of sewage-treatment plant according to claim 1, it is characterised in that: be provided with three layers of mistake in the filtering ponds Filtering layer, from top to bottom successively are as follows: for filtering the filter bed of essence and filtering molecule of the first filter layer of bulky grain, filter small particles Ultrafiltration layer;It is provided with quartz sand in the first filter layer, soft material fiber and particulate filler, the ultrafiltration are provided in the filter bed of essence Ceramic filter plate is provided in layer.
4. a kind of sewage-treatment plant according to claim 1, it is characterised in that: the oxidator includes cabinet, level Baffle, micropore aeration pipe, exhaust level, motor, retarder and aerator;The horizontal baffle is set in the middle part of cabinet, for real The laminar flow of existing sewage;The motor, retarder and the aerator are set to the cabinet top, and the aerator passes through Several ceramic disks of axis connection are turned round, drive the rotating shaft rotation to drive the ceramic disk by the motor and retarder Rotation;Exhaust level is arranged in the horizontal baffle side, and the gas after aeration reaction is discharged;The bottom of box setting is several micro- Hole aeration tube inputs oxygen in Xiang Suoshu oxidator.
5. a kind of sewage-treatment plant according to claim 4, it is characterised in that: the horizontal baffle width and cabinet are wide To spend equal, the horizontal baffle length is more slightly shorter than cabinet length, there are crossing water space between the horizontal baffle both ends and cabinet, Sewage obstructs in cabinet around the horizontal baffle to be circulated in the vertical cyclic loop to be formed.
6. the method that sewage-treatment plant according to claim 1 carries out sewage treatment, it is characterised in that: including following step It is rapid:
1) sewage is imported the anoxic by pipeline to adjust in tank, sewage is adjusted in tank in the anoxic by can biology in sewage What the carbon source in decomposing organic matter released, and preformed precipitate is carried out to the impurity in sewage, it is passed through after 10~12h of stop described In anoxic denitrification tank;
2) it is removed using the microorganism initial breakdown of apposition growth on the biologic packing material on the anoxic denitrification pot sidewall Pollutant in sewage, while using the organic matter in sewage as denitrifying carbon source, to the nitrification of oxidator reflux Liquid carries out denitrification denitrogenation;Meanwhile the air demand by controlling the airlift pump quantifies the sewage in lift pot to the aeration Pond buffers the fluctuation of sewage quality water;
3) solution after denitrification is imported in the aeration tank and carries out Air Exposure, be aerated 3~5h, in initial breakdown sewage Organic matter, and be nitrate nitrogen by mineralized nitrogen;
4) nitration reaction is carried out to sewage by the oxidator, is further nitrate nitrogen by ammonium oxidation, meanwhile, by described Nitrification liquid is flowed back into the anoxic denitrification tank by the pipeline of oxidator bottom setting, makes nitrification liquid in the anoxic denitrification tank The middle total nitrogen that anti-nitration reaction occurs and goes in water removal;
5) sewage after denitrogenating is passed through 2~3h of standing in the sedimentation basin, sewage and mixed liquor is back to the anoxic tune Circular treatment again is carried out in section tank, the clear liquid after precipitating is passed through in the filtering ponds and is filtered, and removes remaining in clear liquid Impurity;
6) filtered clear liquid is imported in the ultrasonic treatment oxidation tank, clear liquid is ultrasonically treated, be ultrasonically treated one section After time, aqueous hydrogen peroxide solution is added into tank, the phosphorus element in clear liquid aoxidizes under the action of aqueous hydrogen peroxide solution;
7) clear liquid after ultrasound, oxidation is imported in the blending tank, bentonite and diatom earth mixtures is added into tank, is gone forward side by side Row mechanical stirring, mixing speed is 20~30r/min, and after stirring a period of time, reaction solution stops 5h;
8) supernatant in the blending tank is imported in the settling tank, pH value adjusting control agent is added in Xiang Suoshu settling tank, adjusted Saving the settling tank pH is 8.5~9.5;Then polymeric aluminum chlorides solution is sprayed into the blending tank, and controls mixing speed For 300~500 r/min, the clear liquid after reaction is filtered by the filter of the settling tank side;
9) it is passed through in the adsorption tower through precipitating, filtered clear liquid, adsorption treatment, place is carried out to clear liquid by the adsorbent It can be discharged after reason.
7. according to the method described in claim 6, it is characterized by: being ultrasonically treated parameter in the step 6) are as follows: power 60~ 120W, 20~40MHz of frequency;The volume ratio of aqueous hydrogen peroxide solution and clear liquid is (5~10): 100;The matter of aqueous hydrogen peroxide solution Measuring score is 20%~30%.
8. according to the method described in claim 6, it is characterized by: swollen in bentonite and diatom earth mixtures in the step 7) The mass ratio of profit soil and diatomite is 60%:40%, and bentonite and diatom earth mixtures dosage are 500mg/L, stirs 1-2d, 5h is stopped after having stirred.
9. according to the method described in claim 6, it is characterized by: adding aluminium polychloride into settling tank in the step 8) Solution, the molar concentration rate for controlling Al/P ion in the settling tank is 2.4~2.7:1.
10. according to the method described in claim 6, it is characterized by: the adsorbent the preparation method is as follows: taking 5 grams of biologies Matter charcoal is added ultrapure water and impregnates simultaneously ultrasound 10min, dries to constant weight at washing 3 times, 110 DEG C repeatedly;To by pretreated biology The concentration that 20mL is added in matter charcoal is the iron nitrate solution of 1mol/L, after stirring for 24 hours at room temperature, is transferred in evaporator, heats Temperature setting is that 12h is reacted under 60 DEG C and vacuumized conditions, and solid material is cooling after taking out, and is washed with deionized water, 25 DEG C 24 h of lower vacuum drying.
CN201811039977.9A 2018-09-06 2018-09-06 A kind of sewage-treatment plant and method Expired - Fee Related CN108996848B (en)

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