CN107857424A - A kind of method for removing black and odorous water - Google Patents

A kind of method for removing black and odorous water Download PDF

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Publication number
CN107857424A
CN107857424A CN201710985787.5A CN201710985787A CN107857424A CN 107857424 A CN107857424 A CN 107857424A CN 201710985787 A CN201710985787 A CN 201710985787A CN 107857424 A CN107857424 A CN 107857424A
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water
black
groove
ammonia nitrogen
processing
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李鹏
刘羽翼
史学峰
谭坚
宾震东
韩凤
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Aerospace Kay Environmental Polytron Technologies Inc
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Aerospace Kay Environmental Polytron Technologies Inc
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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
    • C02F1/52Treatment 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
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • 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
    • C02F1/58Treatment of water, waste water, or sewage by removing specified dissolved compounds
    • C02F1/586Treatment of water, waste water, or sewage by removing specified dissolved compounds by removing ammoniacal nitrogen
    • 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
    • C02F1/76Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • 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
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/02Odour removal or prevention of malodour
    • 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
    • C02F3/02Aerobic processes
    • C02F3/12Activated sludge processes
    • C02F3/1236Particular type of activated sludge installations
    • C02F3/1268Membrane bioreactor systems
    • C02F3/1273Submerged membrane bioreactors
    • 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
    • C02F3/302Nitrification and denitrification treatment
    • 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
    • C02F3/302Nitrification and denitrification treatment
    • C02F3/303Nitrification and denitrification treatment characterised by the nitrification

Abstract

The invention discloses a kind of method for removing black and odorous water, its concrete processing procedure is water leg processing, coagulating treatment, biologic integration processing, chemical dephosphorization processing, precipitation process, ammonia nitrogen advanced treating and pH adjustment processing, this method energy depth removes the organic matter and nitrogen phosphorus compound in sewage, is higher than discharge water《Town sewage plant pollutant emission standard》The one-level A standards of (GB18918 2002), and whole processing procedure does not produce secondary pollution, equipment is simple, and floor space is small, automatically controls stabilization, resistance to overload shock ability is strong, and sludge yield is few, stable effluent quality, is advantageous to popularization and application.

Description

A kind of method for removing black and odorous water
Technical field
The present invention relates to a kind of method for removing black and odorous water, belong to water-treatment technology field.
Background technology
River course Hei Choushi China city environmental pollution and the representative disastrous effect of ecological disruption.In recent years, with China city Economic and industrialized fast development, environmental infrastructure is increasingly insufficient, and quantity of wastewater effluent is continuously increased, and a large amount of pollutants enter River, the pollutant concentration such as COD, nitrogen, phosphorus is exceeded in water body, and River Water Pollution is serious, and water body occurs seasonal or eventually Year is black smelly.At present, urban water-body black smelly phenomenon in China's is on the rise, and compromises the existence health of human body and the appearance in city.
At present, the improvement of part black and odorous water has been carried out.Mainly there are peripheral doses, chemical remediation and ecological management etc. Method, it is conventional have cut a dirt, bed mud desilting, oxygenation aeration, add biological inoculum and medicament, planting aquatic plants etc. and combine Technology etc..Peripheral pollutant can only be controlled by cutting dirt, it is impossible to eliminate the original pollution of water body.Desilting cost is high, easily causes secondary Pollution.Oxygenation aeration can increase the dissolved oxygen in water body, enhance the transparency, but aerator high energy consumption, oxygen-transfer efficiency are low is Universal phenomenon, and can not go to denitrogenate, the pollutant such as phosphorus.Although adding strain and medicament efficiency high, short time effect is good, holds Destructible ecologic structure, causes secondary pollution.The technologies such as planting aquatic plants are using more, by absorbing nutrients in water body Matter, so as to remove the materials such as Water phosphorus, but easily by seasonal effect, having that processing time is long, effect is unstable etc. lacks Point.As Chinese patent (publication number CN102424446A) discloses a kind of method for administering urban rivers and lakes black and odorous water, its A kind of special sediment repairing agent is mainly employed, by the mixed of zeolite powder, activated carbon, oxygenation agent, flocculant and adhesive Compound, using sediment repairing agent of the present invention, the black smelly phenomenon of water body can be effectively reduced or even eliminated, water can be prevented Body turns over black mud phenomenon, can lift water transparency.Chinese patent (publication number CN103570140A) one kind quickly improves small-sized The black smelly method in river, nitrate anion and denitrifying bacterium are added to water body, while water pH value is adjusted to 5~6, this method can be fast Speed improves black and odorous water phenomenon, has the advantages that reduced investment, quick, effect is good, easy to operate.These methods rely primarily on addition Chemical reagent reparation, easily cause secondary pollution, destroy ecological environment.Chinese patent (CN 102701519A) discloses one kind Using the method in electrochemistry combination ecological control on black-odor river course, including following measures:1) bio-contact oxidation, at electrochemistry Reason, oxygenation aeration processing;2) microbial bacterial agent is put into, terminates electrochemical treatments before this, while keep oxygenation aeration to handle; 3) bed mud bacteria agent is sprinkled into, while keeps oxygenation aeration to handle;4) be spaced a distance placement biofilm system;5) people is set Work chinampa, the plantation very water water plant on artificial floating island.This method uses electrochemistry combination biological treatment, economy, actual effect, reaches Administered to quick, eliminate black and odorous water, extend river course biological chain, increase aqueous bio diversity, improve river water body from net energy Power.But aerator high energy consumption, oxygen-transfer efficiency are low, and by plant go to denitrogenate, the pollutant such as phosphorus, it is less efficient, with season Section fluctuation is big.
The content of the invention
For prior art to insufficient existing for the treatment technology of black and odorous water, the purpose of the present invention is to be to provide one kind Organic matter and nitrogen phosphorus in water body can be effectively removed, and generation sludge is few, does not cause secondary pollution to environment, makes the side of water stabilization Method, this method can reach urban river sewage《Town sewage plant pollutant emission standard》(GB18918-2002) one-level A Standard.
Compared with the prior art, the invention provides a kind of method for removing black and odorous water, this method to comprise the following steps:
1) pretreating sewage carries out homogeneous into water leg and measures regulation;
2) water outlet of water leg enters coagulation tank progress flocculation sediment;
3) water outlet of coagulation tank enters biologic integration processing system;The biologic integration processing system by A/O grooves and MBR films groove forms;The water outlet of coagulation tank passes sequentially through A/O grooves and MBR film grooves;
4) water outlet of biologic integration processing system enters chemical dephosphorization groove progress coagulation for phosphorus removal;
5) water outlet of chemical dephosphorization groove enters stillpot progress separation of solid and liquid;
6) water outlet of stillpot removes ammonia nitrogen into ammonia nitrogen advanced treating groove by Chemical deep;
7) water outlet of ammonia nitrogen advanced treating groove is discharged after entering pH adjustment tank regulating water quality pH to 6~9.
Preferable scheme, the flocculant that the flocculation sediment process uses are made up of aluminium polychloride and polyacrylamide. More preferably scheme, concentration of the aluminium polychloride in aqueous systems are 30~50mg/L, and the polyacrylamide is in water body Concentration in system is 5~15mg/L.
Preferable scheme, the pH value of A section grooves is 6~8 in the A/O grooves, and dissolved oxygen is 0.2~0.4mg/L, O section grooves PH value is 6.8~7.8, and dissolved oxygen is 2~3mg/L.
More preferably scheme, the interior addition alkaline matter of the O sections groove is to ensure O sections basicity as 80~150mg/L.
Further preferred scheme, the alkaline matter combine for solid sodium carbonate or sodium hydroxide solution or both.
More preferably scheme, the MBR films groove are provided with immersion MBR films;The immersion MBR films are suction pump, aeration Device and the membrane bioreactor of bio-reaction system integration.
Preferable scheme, the coagulant that the coagulation for phosphorus removal uses is molysite.More preferably scheme, the molysite is in water body Concentration in system is 40~60mg/L.
Preferable scheme, the stillpot use tube settling formula, and its inclined tube is honeycomb inclined-tube.More preferably scheme, institute The surface loading for stating stillpot is 0.9~1.2m3/m2·h。
Preferable scheme, the Chemical deep remove ammonia nitrogen reagent except ammonia nitrogen is used as using liquor natrii hypochloritis.More preferably Scheme, the mass percent concentration of liquor natrii hypochloritis is 10%, and its dosage in aqueous systems is 10~20L/h.
Preferable scheme, pretreating sewage residence time in water leg are 4~8h, the residence time in coagulation tank For 10~15min, residence time is 8~10h in biologic integration processing system, the residence time in chemical dephosphorization groove For 15~20min, residence time is 1.5~2.0h in stillpot, and residence time is 1.0 in ammonia nitrogen advanced treating groove ~1.3h, residence time is 20~30min in pH adjustment tanks.
The method of the removal black and odorous water of the present invention, including step in detail below:
1) water leg is handled:Water quality and quantity is adjusted to pretreating sewage in water leg, obtains the sewage of water quality sum;Collection Hydraulic detention time is 4~8h in tank;
2) coagulating treatment:After water quality sewage lifting to the coagulation tank of sum as obtained by sewage pump by step 1), throw Add flocculant, flocculant is aluminium polychloride and polyacrylamide composite reagent, wherein, the dosage of aluminium polychloride for 30~ 50mg/L, the dosage of polyacrylamide is 5~15mg/L, and the colloidal substance of the suspension in sewage and difficult sedimentation is converted into Bulky grain floccule, it is removed after forming scum silica frost;Hydraulic detention time is 10~15min in coagulation tank;
3) biologic integration processing system:The sewage handled by step 2) enters biologic integration processing system, biology A/O grooves and MBR film grooves are provided with integrated processing system;Sewage after coagulating initially enters A/O grooves, wherein, A section grooves pH It is worth for 6~8, dissolved oxygen is 0.2~0.4mg/L;The O sections groove pH value is 6.8~7.8, and dissolved oxygen is 2~3mg/L, is mainly removed Most ammonia nitrogen and organic pollution are removed, is further increased water quality;After recycling MBR films mainly to retain nitrification/denitrification Suspension, MBR films groove are immersion, are characterized in integrating suction pump, aerator and bio-reaction system, membrane module is direct It is put in bioreactor, flow velocity is provided by the stirring of air in film;Alkali is added into the aerobic section (O sections) of A/O grooves simultaneously, with Ensure that (basicity maintains 80~150mg/L, and alkali is soda ash sodium carbonate or liquid caustic soda for the pH value in aerobic section and basicity (mass concentration 30%), or the mixed liquor of soda ash and liquid caustic soda);In biologic integration treatment trough hydraulic detention time be 8~ 10h;
4) chemical dephosphorization is handled:The sewage handled by step 3) enters chemical dephosphorization groove, dosing coagulant, removes total Phosphorus;Hydraulic detention time in chemical dephosphorization groove is 15~20min;Coagulant is molysite, and molysite includes bodied ferric sulfate, chlorination Iron, ferric sulfate etc., the dosage of the coagulant is 40~60mg/L;
5) stillpot:Enter stillpot by the sewage 4) handled, by precipitating separation of solid and liquid, most of phosphorus forms precipitation Thing, remove, be present in sludge from water;Hydraulic detention time is 1.5~2.0h in stillpot;Stillpot uses tube settling Formula, wherein, inclined tube is the honeycomb inclined-tube of polypropylene material, and the surface loading of the stillpot is 0.9~1.2m3/(m2·h);
6) ammonia nitrogen advanced treating:The sewage handled by step 5) enters ammonia nitrogen advanced treating groove, by adding hypochlorous acid Sodium further removes ammonia nitrogen, and sodium hypochlorite mass concentration is 10%, and dosage is 10~20L/h, while contains time chlorine in water Acid group, also there is the effect of disinfection to water body;The ammonia nitrogen advanced treating trough inner water power residence time is 1.0~1.3h;
7) acid-base accommodation is handled, and the water handled by step 6) enters pH adjustment tanks, and adding the chemical agents such as soda acid makes water Qualified discharge after matter pH maintains 6~9;Hydraulic detention time in pH adjustment tanks is 20~30min;Acid is hydrochloric acid, sulfuric acid etc. Conventional inorganic acid.
Compared with the prior art, the beneficial effect that technical scheme is brought:
(1) method provided by the invention for removing black and odorous water, coagulation is carried out, using A/ using flocculation sediment technique O techniques and MBR membrane treatment process carry out two stage treatment and combined using chemical reagent progress advanced treating, ensure that effluent quality is strict in 《Town sewage plant pollutant emission standard》(GB18918-2002) one-level A standards, it is ensured that standard water discharge is discharged.
(2) method provided by the invention for removing black and odorous water, is consolidated using A/O technique combination immersion MBR treatment technologies Liquid separative efficiency is high, and without two deep gouges, equipment is simple, and it is small that structures occupy space, automatically controls stabilization, resistance to overload shock ability By force, sludge yield is few, stable effluent quality;Relatively conventional activated sludge process, whole process do not produce secondary pollution.
(3) method provided by the invention for removing black and odorous water, front end are nitrified preceding using the processing of A/O methods, denitrification Afterwards, if interior circulation, using the organic substrates in raw sewage as carbon source, effect is good, and anti-nitration reaction is abundant;Aeration tank makes anti-rear Nitrification residue is further removed, and improves processing water water quality;A sections stir, and only play a part of to make sludge suspension, and avoid DO increase;The leading portion of O sections is reduced tolerance, is made the DO contents of interior circulation fluid reduce, to ensure A sections using strong aeration, back segment Anaerobic condition.
(4) method provided by the invention for removing black and odorous water, using immersion MBR membrane separation processes, it utilizes UF membrane Equipment retains the activated sludge in A/O grooves and larger molecular organicses, and hydraulic detention time and sludge retention time can divide Do not control, and the material of difficult degradation constantly reacts, degraded in the reactor;On the one hand, film has retained the microorganism in reaction tank, Greatly increase the activated sludge concentration in pond, make degraded sewage biochemical reaction be proceeded more quickly it is more thorough;On the other hand, Due to the high filtering precision of film, it ensure that water outlet is as clear as crystal so as to saving two deep gouges.
(5) method provided by the invention for removing black and odorous water, using rearmounted chemical dephosphorization method, because front end employs A/O denitrification process, pond body is built with biologic packing material, if using synchronous dephosphorization method, returned sludge can cause not to A/O techniques Good influence, so as to reduce nitric efficiency, therefore technical scheme uses rearmounted dephosphorization method.
(6) method provided by the present invention for removing black and odorous water, ammonia nitrogen discharge is ensured using rearmounted break point chlorination method Concentration is lower, and the method has that the haptoreaction time is short, and treatment effect is high, effect stability, and not by Water Temperature, it is excellent that investment is less etc. Point.
Brief description of the drawings
【Fig. 1】For the schematic diagram of the sewage treatment process of removal black and odorous water provided by the present invention.
Embodiment
Following examples are intended to be described further the present invention with reference to accompanying drawing, rather than limitation the claims in the present invention Protection domain.
As shown in figure 1, the method that the present invention removes black and odorous water, comprises the following steps successively:
1) water leg processing 11, homogeneous is carried out to pretreated waste water and measures regulation, obtains the sewage of equal sum;
2) coagulating treatment 12, after water quality as obtained by sewage pump by step 1) sewage lifting to the coagulation tank of sum, Flocculant is added, the colloidal substance of the suspension in sewage and difficult sedimentation is converted into bulky grain floccule, forms quilt after scum silica frost Remove;
3) biologic integration processing system 13, the sewage handled by step 2) enter biologic integration processing system, are A/O grooves and MBR film grooves are provided with system.Sewage after coagulating initially enters A/O grooves, removes most ammonia nitrogen and organic dirt Thing is contaminated, is further increased water quality;MBR films mainly retain the suspension after nitrification/denitrification;Simultaneously into the aerobic section of A/O grooves Alkali is added, to ensure the pH value and basicity in aerobic section;
4) chemical dephosphorization processing 14, the sewage handled by step 3) enter chemical dephosphorization groove, dosing coagulant, removed total Phosphorus;
5) settling system 15, stillpot is entered by the sewage 4) handled, by precipitating separation of solid and liquid, most of phosphorus is formed Sediment, remove, be present in sludge from water;
6) ammonia nitrogen advanced treating 16, handled by step 3) and remove most ammonia-nitrogen pollutant, handled by step 5) Sewage enters ammonia nitrogen advanced treating groove, and ammonia nitrogen is further removed by adding sodium hypochlorite, while contains hypochlorite in water, Also there is the effect of disinfection to water body;
7) acid-base accommodation processing 17, the water handled by step 6) enters pH adjustment tanks, and adding the chemical agents such as soda acid makes Water quality pH is discharged after maintaining 6-9.
Embodiment 1
Landscape River in the city in certain city, its water quality characteristic is as shown in table 1, black using removal water body provided by the present invention Smelly sewage treatment process is handled.
Wherein, waste water residence time in water leg be 5h, the hydraulic detention time in coagulation tank be 11min, in life Hydraulic detention time is 10h in thing integrative treatment trough, the hydraulic detention time in chemical dephosphorization groove is 17min, precipitating Hydraulic detention time in groove is 1.55h, hydraulic detention time is 1.13h, in pH adjustment tanks in ammonia nitrogen advanced treating groove Hydraulic detention time be 26min.It is 35mg/L that polyaluminium aluminum amount is added in coagulation tank, and the polyacrylamide amount added is 5mg/L;It is 7.3 in O sections pH value in A sections pH most 6.7, the dissolved oxygen 0.26mg/L of biologic integration processing system, dissolving Oxygen is 2.2mg/L;The coagulant of chemical dephosphorization uses bodied ferric sulfate, dosage 45mg/L;Ammonia nitrogen advanced treating is using folding Point chlorination, sodium hypochlorite mass concentration are 10%, dosage 13L/h.
In processing procedure, free from extraneous odour, non-secondary pollution, water quality is as clear as crystal, and the sewage handled by this invented technology is arranged Enter neighbouring river, water body occurs without the smelly phenomenon that blacks.Outlet effect is shown in Table 1.
The water body of Landscape River water quality contrast table before and after treatment in certain the city city of table 1
Unit:Except mg/L, pH
Water quality index PH value CODcr BOD5 SS NH3-N TP TN Colourity
Before processing 7.29 228 115 100 42 6.5 65 75
After processing 7.85 21.1 5.5 6.1 0.83 0.11 0.80 4
Standard limited value 6~9 50 10 10 5(8) 0.5 15 30
Note:1. standard limited value reference《Town sewage plant pollutant emission standard》(GB18918-2002) one-level A standards; Con trolling index when 2. the outer numerical value of bracket is 12 DEG C of water temperature >, numerical value in bracket, Con trolling index when being water temperature≤12 DEG C.
It was found from the data of table 1, a kind of sewage treatment process for removing black and odorous water provided by the present invention, at sewage Reason effect is good, and the pollutant concentration after processing is reduced, and water quality is limpid, and water quality is substantially better than after processing《Town sewage plant pollutes Thing discharge standard》Middle one-level A standards, it is discharged into neighbouring river without black smelly phenomenon.
Above-mentioned above is the preferred embodiment of the present invention, is not intended to limit the invention, all in spiritual principles of the present invention Interior, any modification, equivalent substitution and improvements done etc., it should be included in the scope of the protection.
Comparative example 1
Using the contaminant water of the black and odorous river in certain city, wherein, waste water residence time in water leg is 4.2h, in coagulation Hydraulic detention time in groove is 13min, hydraulic detention time is 8.5h in A/O grooves, the waterpower in chemical dephosphorization groove stops It is 15min to stay the time, the hydraulic detention time in stillpot is 1.5h, hydraulic detention time is in ammonia nitrogen advanced treating groove 1.0h, the hydraulic detention time in pH adjustment tanks are 22min.It is 31mg/L that polyaluminium aluminum amount is added in coagulation tank, is thrown The polyacrylamide amount added is 8.5mg/L;It is 6.3, dissolved oxygen 0.31mg/L in the A sections pH value of A/O grooves, is in O section pH value 6.9, dissolved oxygen 2.7mg/L;The coagulant of chemical dephosphorization uses ferric sulfate, dosage 40mg/L;Ammonia nitrogen advanced treating is adopted With break point chlorination method, the sodium hypochlorite dosage that mass concentration is 10% is 11L/h.
Table 2 certain black and odorous water water quality contrast table before and after treatment
Unit:Except mg/L, pH
Water quality index PH value CODcr BOD5 SS NH3-N TP TN Colourity
Before processing 7.06 210 92 87 36 4.3 49 57
After processing 7.41 43.7 10.2 13.4 4.5 0.67 4.3 12
Standard limited value 6-9 50 10 10 5(8) 0.5 15 30
Note:1. standard limited value reference《Town sewage plant pollutant emission standard》(GB18918-2002) one-level A standards; Con trolling index when 2. the outer numerical value of bracket is 12 DEG C of water temperature >, numerical value in bracket, Con trolling index when being water temperature≤12 DEG C.
The water quality situation of polluted-water before and after the processing is shown in Table 2.
Compared with Example 1, the handling process is without MBR film grooves, i.e., the bar of the handling process parameter provided in technical scheme Under part, sewage passes through " water leg processing-coagulating treatment-A/O grooves-chemical dephosphorization processing-precipitation process-ammonia nitrogen depth It is directly outer to arrange after reason-pH adjustment processing ".In effluent quality, in addition to pH value, every main pollutant consistence increased, Wherein BOD5The standard limited value in table 2 can not be stably reached, SS, TP exceed the standard limited value of table 2, and effluent quality does not reach《Cities and towns Sewage plant pollutant emission standard》(GB18918-2002) one-level A standards, but the water quality after processing can meet《Town sewage Factory's pollutant emission standard》(GB18918-2002) one-level B standard.MBR is one kind in activated sludge process, is to utilize biology Reactive tank (aeration tank) includes the organic pollution in the activated sludge absorption water body of microorganism species, and using it as nutriment Or fertile material, the organic pollution in water body is decomposed the purpose for reaching purification sewage.It has further remove COD, BOD5It is preferable to SS rejection effect with TP function.
Comparative example 2
Using the sewage in embodiment, in addition to rearmounted dephosphorization, other processing methods are carried out according to explanation in embodiment.Its In, waste water residence time in water leg is 5.9h, the hydraulic detention time in coagulation tank is 10min, in biologic integration In treatment trough hydraulic detention time be 9.0h, the hydraulic detention time in stillpot be 1.8h, in ammonia nitrogen advanced treating groove Hydraulic detention time is 1.2h, the hydraulic detention time in pH adjustment tanks is 20min.Aluminium polychloride is added in coagulation tank Measure as 34mg/L, the polyacrylamide amount added is 6.5mg/L;It is molten in the A sections pH most 7.1 of biologic integration processing system Solution oxygen is 0.21mg/L, is 7.0 in O sections pH value, dissolved oxygen 2.5mg/L;Ammonia nitrogen advanced treating uses break point chlorination method, secondary chlorine Sour sodium mass concentration is 10%, dosage 15L/h.
The water body of Landscape River water quality contrast table before and after treatment in certain the city city of table 3
Unit:Except mg/L, pH
Water quality index PH value CODcr BOD5 SS NH3-N TP TN Colourity
Before processing 7.38 231 112 109 40 7.3 70 70
After processing 7.63 20.4 5.8 5.3 1.06 0.81 2.3 7
Standard limited value 6-9 50 10 10 5(8) 0.5 15 30
Note:1. standard limited value reference《Town sewage plant pollutant emission standard》(GB18918-2002) one-level A standards; Con trolling index when 2. the outer numerical value of bracket is 12 DEG C of water temperature >, numerical value in bracket, Con trolling index when being water temperature≤12 DEG C.
The water quality situation of polluted-water before and after the processing is shown in Table 3.
Compared with Example 1, the handling process is without chemical dephosphorization groove, i.e., the handling process parameter provided in technical scheme Under the conditions of, sewage passes through " water leg processing-coagulating treatment-A/O+MBR films groove processing-precipitation process-ammonia nitrogen depth It is directly outer to arrange after reason-pH adjustment processing ".In effluent quality, in addition to TP, every main pollutant consistence stably reaches《City Town sewage plant pollutant emission standard》(GB18918-2002) one-level A standards, but exceeded 0.6 times of TP.Meet water outlet TP≤ 0.5mg/L, clearance need to reach 93.2%, although and coagulating treatment, A/O+MBR films groove processing can remove most of TP, go Except rate is generally less than 90%, so lacking chemical dephosphorization groove, TP can not reach《Town sewage plant pollutant emission standard》 (GB18918-2002) one-level A standards.
Comparative example 3
Using the sewage in embodiment, chemical dephosphorization technique is changed into A/O grooves leading portion and carried out i.e. in coagulation tank, other processing Method illustrates to carry out according to embodiment.
Wherein, waste water residence time in water leg be 5.0h, the hydraulic detention time in coagulation tank be 25min, Hydraulic detention time is 7.5h in biologic integration treatment trough, the hydraulic detention time in stillpot is 1.70h, deep in ammonia nitrogen Spend treatment trough in hydraulic detention time be 1.1h, the hydraulic detention time in pH adjustment tanks be 24min.Added in coagulation tank Polyaluminium aluminum amount is 43mg/L, and the polyacrylamide amount added is 10.5mg/L;In the A sections pH of biologic integration processing system Most 6.5, dissolved oxygen 0.32mg/L, it is 7.0 in O sections pH value, dissolved oxygen 2.3mg/L;Ammonia nitrogen advanced treating uses break Chlorination, sodium hypochlorite mass concentration are 10%, dosage 13L/h.
The water body of Landscape River water quality contrast table before and after treatment in certain the city city of table 4
Unit:Except mg/L, pH
Water quality index PH value CODcr BOD5 SS NH3-N TP TN Colourity
Before processing 7.32 235 122 105 54 6.1 72 75
After processing 7.46 24.5 6.3 4.9 1.16 0.59 1.39 5
Standard limited value 6~9 50 10 10 5(8) 0.5 15 30
Note:1. standard limited value reference《Town sewage plant pollutant emission standard》(GB18918-2002) one-level A standards; Con trolling index when 2. the outer numerical value of bracket is 12 DEG C of water temperature >, numerical value in bracket, Con trolling index when being water temperature≤12 DEG C.
The water quality situation of polluted-water before and after the processing is shown in Table 4.
Compared with Example 1, rearmounted chemical dephosphorization groove is changed to front end chemical dephosphorization by the handling process, i.e., in technical scheme Under conditions of the handling process parameter of offer, sewage passes through " water leg processing-coagulating treatment-chemical dephosphorization processing-A/O+ It is directly outer to arrange after MBR films groove processing-precipitation process-ammonia nitrogen advanced treating-pH adjustment processing ".In effluent quality, except TP Outside, every main pollutant consistence stably reaches《Town sewage plant pollutant emission standard》(GB18918-2002) one-level A standards, but exceeded 0.18 times of TP.Although TP concentration is less than comparative example 2 in water outlet, it is far above embodiment 1.Will be rearmounted After dephosphorization is changed to front end dephosphorization, not only phosphor-removing effect is deteriorated, and also creates substantial amounts of sludge, adds processing cost.Handle work Skill front end is provided with PAC, PAM adding of agent system, eliminates a part of total phosphorus in sewage, and A/O grooves are built with biology Filler, if using front end, synchronous dephosphorization method, returned sludge can have undesirable effect to A/O techniques, so as to reduce denitrogenation effect Rate.Meanwhile the adding of agent of rearmounted dephosphorization can be controlled by the change of phosphorus load, and caused phosphate sludge can be single Solely discharge, and can be used.
Embodiment 1 and comparative example 2,3 show that the rearmounted dephosphorization method that technical scheme uses can make TP stably reach cities and towns Sewage plant pollutant emission standard》(GB18918-2002) one-level A standards.

Claims (10)

  1. A kind of 1. method for removing black and odorous water, it is characterised in that:Comprise the following steps:
    1) pretreating sewage carries out homogeneous into water leg and measures regulation;
    2) water outlet of water leg enters coagulation tank progress flocculation sediment;
    3) water outlet of coagulation tank enters biologic integration processing system;The biologic integration processing system is by A/O grooves and MBR films Groove forms;The water outlet of coagulation tank passes sequentially through A/O grooves and MBR film grooves;
    4) water outlet of biologic integration processing system enters chemical dephosphorization groove progress coagulation for phosphorus removal;
    5) water outlet of chemical dephosphorization groove enters stillpot progress separation of solid and liquid;
    6) water outlet of stillpot removes ammonia nitrogen into ammonia nitrogen advanced treating groove by Chemical deep;
    7) water outlet of ammonia nitrogen advanced treating groove is discharged after entering pH adjustment tank regulating water quality pH to 6~9.
  2. 2. the method according to claim 1 for removing black and odorous water, it is characterised in that:What the flocculation sediment process used Flocculant is made up of aluminium polychloride and polyacrylamide;Concentration of the aluminium polychloride in aqueous systems is 30~50mg/ L, concentration of the polyacrylamide in aqueous systems are 5~15mg/L.
  3. 3. the method according to claim 1 for removing black and odorous water, it is characterised in that:The pH value of A section grooves in the A/O grooves For 6~8, dissolved oxygen is 0.2~0.4mg/L, and the pH value of O section grooves is 6.8~7.8, and dissolved oxygen is 2~3mg/L.
  4. 4. the method according to claim 3 for removing black and odorous water, it is characterised in that:Addition basic species in the O sections groove Matter is to ensure O sections basicity as 80~150mg/L.
  5. 5. the method according to claim 4 for removing black and odorous water, it is characterised in that:The alkaline matter is solid carbonic acid Sodium or sodium hydroxide solution or both combine.
  6. 6. the method according to claim 1 for removing black and odorous water, it is characterised in that:The MBR films groove is provided with immersion MBR films;The immersion MBR films are the membrane bioreactor of suction pump, aerator and bio-reaction system integration.
  7. 7. the method according to claim 1 for removing black and odorous water, it is characterised in that:The coagulation that the coagulation for phosphorus removal uses Agent is molysite;Concentration of the molysite in aqueous systems is 40~60mg/L.
  8. 8. the method according to claim 1 for removing black and odorous water, it is characterised in that:The stillpot uses tube settling Formula, its inclined tube are honeycomb inclined-tube;The surface loading of the stillpot is 0.9~1.2m3/m2·h。
  9. 9. the method according to claim 1 for removing black and odorous water, it is characterised in that:The Chemical deep uses except ammonia nitrogen Liquor natrii hypochloritis is used as and removes ammonia nitrogen reagent;The mass percent concentration of liquor natrii hypochloritis is 10%, and it is in aqueous systems Dosage is 10~20L/h.
  10. 10. the method for the removal black and odorous water according to any one of claim 1~9, it is characterised in that:Pretreating sewage exists Residence time is 4~8h in water leg, and residence time is 10~15min in coagulation tank, in biologic integration processing system Residence time is 8~10h in system, and residence time is 15~20min in chemical dephosphorization groove, stopped in stillpot when Between be 1.5~2.0h, residence time is 1.0~1.3h in ammonia nitrogen advanced treating groove, the residence time in pH adjustment tanks For 20~30min.
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