CN103288304A - AO2 Method for Treating High Ammonia Nitrogen Industrial Wastewater - Google Patents

AO2 Method for Treating High Ammonia Nitrogen Industrial Wastewater Download PDF

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CN103288304A
CN103288304A CN2013102679737A CN201310267973A CN103288304A CN 103288304 A CN103288304 A CN 103288304A CN 2013102679737 A CN2013102679737 A CN 2013102679737A CN 201310267973 A CN201310267973 A CN 201310267973A CN 103288304 A CN103288304 A CN 103288304A
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waste water
nitrogen industrial
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李相昆
周合喜
马凯丽
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Harbin Institute of Technology Shenzhen
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Harbin Institute of Technology Shenzhen
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Abstract

AO2处理高氨氮工业废水的方法，它涉及一种高氨氮工业废水处理方法。本发明是要解决传统完全硝化反硝化中溶解氧（DO）消耗大，废水自身碳源不足，需要外加碳源以及带来的处理费用高的问题。本发明通过如下步骤来实现：一、高氨氮废水经预处理后进入进水池；二、由进水池进入缺氧池；三、由缺氧池进入微氧段；四、由微氧段进入好氧段；五、由好氧段进入二沉池。本发明可用于高氨氮工业废水尤其合成氨废水处理工程领域。

Figure 201310267973

The invention relates to a method for treating high ammonia nitrogen industrial wastewater by AO 2 , which relates to a method for treating high ammonia nitrogen industrial wastewater. The invention aims to solve the problems of large consumption of dissolved oxygen (DO) in traditional complete nitrification and denitrification, insufficient carbon source of waste water itself, need for additional carbon source and high treatment cost. The present invention is realized through the following steps: 1. High ammonia nitrogen wastewater enters the water inlet pool after being pretreated; 2. Enters the anoxic pool from the water inlet pool; Oxygen section; Fifth, enter the secondary sedimentation tank from the aerobic section. The invention can be used in the field of high ammonia nitrogen industrial waste water, especially synthetic ammonia waste water treatment engineering.

Figure 201310267973

Description

AO 2Handle the method for industrial waste water with high ammoniac nitrogen
Technical field
The invention belongs to the Industrial Wastewater Treatment field, special in the high sewage water treatment method of present industrial waste water with high ammoniac nitrogen processing cost.
Background technology
For a long time, no matter be at wastewater biological denitrificaion in theory or in the waste water treatment engineering practice, people think always, realize that wastewater biological denitrificaion just must make
Figure BDA00003430026100011
Experience typical nitration denitrification process, this approach also can be referred to as whole process (or fully) nitration denitrification biological denitrificaion.Biological denitrification process was divided into for 2 steps: the 1st step was nitrification, and namely under the condition of oxygen supply abundance, the ammonia nitrogen in the water at first is oxidized to nitrite under the effect of nitrite bacteria, further is oxidized to nitrate again under the effect of nitrobacteria; The 2nd step was denitrification, and under anaerobic namely, denitrifying bacterium will under the situation that essential carbon source is arranged Be reduced to.A series of bio-denitrification technologies have been made up in traditional biological denitrogenation theoretical basis, as A/O, A 2/ O etc.But a series of problems that traditional wastewater biological denitrificaion technology reflects: (1) energy consumption height, nitration reaction are aerobic processes, and oxygen supply needs power consumption, and for the Prepositive denitrification biological denitrification system, the setting of internal reflux has also increased energy consumption; (2) organism (organic carbon) must be arranged as electron donor in the denitrification process, though the Prepositive denitrification system can utilize organism in useless as carbon source, if C/N deficiency in the waste water, also can influence denitrification effect, the rear-mounted denitrification system has to add additional carbons such as methyl alcohol, certainly will cause the waste of resource, therefore needs the dosage of strict control organic carbon, too much can influence water outlet BOD5, crossing influences denitrification effect at least; 3) nitration reaction is acid process, and anti-nitration reaction in order to keep the normal operation of system, must add a large amount of acid-base neutralisation reagent for producing the alkali process, has increased the working cost of biological denitrification system.
In the processing of industrial waste water with high ammoniac nitrogen, the removal of the ammonia nitrogen bottleneck of handling this class wastewater treatment that often becomes up to standard.And, along with the serious day by day and people of water quality eutrophication problem to the going deep into of nitrogen harm quality of water environment understanding, in the wastewater treatment to the processing standard of nitrogen also increasingly stringent.And the waste water nitrogen content of discharging in the industrial production is higher, and the C/N value is lower, and effluent quality is difficult to meet the demands when adopting conventional complete nitrification art breading, and because the ammonia nitrogen concentration height needs to increase aeration to satisfy the dissolved oxygen requirement of ammonia nitrogen oxidation.In addition, the low C/N character of waste water causes the denitrifying carbon source deficiency, and nitric efficiency is low, needs additional carbon.Therefore, the processing costs of waste water is high and be accompanied by the problem of high energy consumption.
Summary of the invention
The present invention be to solve tradition fully in the nitration denitrification dissolved oxygen (DO) consume big, waste water self carbon source deficiency, the high problem of processing costs that needs additional carbon and bring, and propose AO 2The method that industrial waste water with high ammoniac nitrogen is handled.
AO among the present invention 2Handling the method for industrial waste water with high ammoniac nitrogen carries out according to the following steps:
One, industrial waste water with high ammoniac nitrogen enters pump sump after pretreatment system is handled, and enters biochemical system through pump sump;
Two, the industrial waste water with high ammoniac nitrogen that enters biochemical system at first enters anoxic pond, and with the nitrosification liquid that refluxes, nitrification liquid and second pond returned sluge mix, under the effect of stirring, mix, wherein the HRT of anoxic pond is 1.5h～2.5h, and DO is 0mg/L～0.5mg/L;
Three, the waste water after step 2 is handled enters little oxygen section, under the stirring of little aerating system, after mixing, the water outlet 90%～110% of little oxygen section is back in the anoxic pond, the effluent recycling amount of wherein said little oxygen section is identical with the flooding quantity that step 1 adds industrial waste water with high ammoniac nitrogen, wherein, the HRT of little oxygen section is 1.5h～2.5h, and DO is 0.3mg/L～1mg/L;
Four, the waste water after the little oxygen section of step 3 is handled, enter aerobic section after in medium sediment pool, stopping 20min～40min, carry out oxidation and nitration reaction, reacted nitrification liquid 90%～110% is back to anoxic pond, wherein said nitrification liquid quantity of reflux is identical with the flooding quantity that step 1 adds industrial waste water with high ammoniac nitrogen, wherein HRT is 5.5h～6.5h in the aerobic section, and DO is 2mg/L～4mg/L;
Five, remaining nitrification liquid entered second pond after step 4 refluxed, the post precipitation discharging, and wherein the HRT of second pond is 1.5h～2.5h;
Six, the mud of second pond discharge is back to anoxic pond, and wherein reflux ratio is 20%～50%, discharges after the back excess sludge that refluxes advances subsequent disposal, namely finishes AO 2Handle the process of industrial waste water with high ammoniac nitrogen.
The theoretical basis of technical solution of the present invention: the Sewage treatment systems that the inventive method adopts comprises: pump sump, biochemical system and second pond, wherein biochemical system comprises: anoxic pond, little oxygen pond and Aerobic Pond.
In recent years, nitrogenous compound causes the phenomenon of water pollution and water quality eutrophication serious day by day.In the face of the global wastewater discharge standard of strictness day by day, the energy-efficient denitrogenation of waste water technology of development and application has become the research focus in current water pollution control field.In 20 end of the centurys, the wastewater biological denitrificaion latest development has broken through traditional theoretical and understanding, and some results of study show, can Be oxidized to After directly carry out anti-nitration reaction, Here it is part nitration denitrification.
The process of biological denitrificaion comprises two stages of nitrification and denitrification, and nitrifying process mainly contains two kinds of microorganisms and forms ammonia oxidation bacteria (AOB) and nitrite nitrogen oxidation bacterium (NOB).And the theoretical core of part nitration denitrification is to make nitration reaction rest on the nitrosification stage, carries out denitrification denitrogenation subsequently.Therefore generally, the DO saturation constant of AOB is 0.3mg/L, and NOB is 1.1mg/L, as DO during less than 1mg/L, can utilize the dynamics difference of these two kinds of bacterium to achieve the goal.For realizing the part nitration denitrification of industrial waste water with high ammoniac nitrogen waste water, the dissolved oxygen in the control biological tank makes AOB become the dominant bacteria of nitrifier in active sludge, suppresses NOB, avoids the complete nitrification reaction.The new bio denitrification process AO of Ti Chuing on this basis 2Dissolved oxygen (DO) consumes greatly in the complete nitration denitrification of solution tradition, waste water self carbon source deficiency, and the high problem of processing costs that needs additional carbon and bring is particularly suitable for handling industrial waste water with high ammoniac nitrogen.
The present invention includes following beneficial effect:
1, the generation cycle of ammonia oxidation bacteria (AOB) is shorter than nitrite nitrogen oxidation bacterium (NOB) generation cycle, proliferative speed is fast, control little oxygen pond the nitrosification stage subsequently denitrification denitrogenation can improve microorganism in the system with nitration reaction speed, shorten the nitration reaction time, thereby can reduce reactor volume, save initial cost;
2, according to the nitrosification bioprocesses, control can be saved nitrous acid nitrogen to the oxygen requirement of nitrate nitrogen and save the needed organic carbon source of a part of denitrification in the nitrosification stage, compare traditional technology, the part nitration denitrification can be saved 25% DO and 40% carbon source, the character that is fit to the low C/N of waste water, reduce additional carbon, can save working cost;
3, nitrite nitrogen is that nitrate nitrogen is 1.5～2 times of substrate as the denitrification rate of denitrification substrate, therefore saves 50% denitrification reactor volume, and in addition, sludge yield is low, the mud growing amount of minimizing 50% and the throwing alkali number in nitrated stage;
4, hold back AOB by medium sediment pool and be back to little oxygen pond, can guarantee the reaction system biomass, improve the nitrosification rate as much as possible, undesirable owing to relying on DO to control nitrosifying Continuous Flow operating performance merely simultaneously, realize that by the series connection Aerobic Pond oxidation of ammonia nitrogen is protected;
Description of drawings
Fig. 1 is AO of the present invention 2Handle the schematic flow sheet of industrial waste water with high ammoniac nitrogen treatment process.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with Fig. 1 and embodiment.
Embodiment one: the AO of present embodiment 2Handling the method for industrial waste water with high ammoniac nitrogen carries out according to the following steps:
One, industrial waste water with high ammoniac nitrogen enters pump sump after pretreatment system is handled, and enters biochemical system through pump sump;
Two, the industrial waste water with high ammoniac nitrogen that enters biochemical system at first enters anoxic pond, and with the nitrosification liquid that refluxes, nitrification liquid and second pond returned sluge mix, under the effect of stirring, mix, wherein the HRT of anoxic pond is 1.5h～2.5h, and DO is 0mg/L～0.5mg/L;
Three, the waste water after step 2 is handled enters little oxygen section, under the stirring of little aerating system, after mixing, the water outlet 90%～110% of little oxygen section is back in the anoxic pond, the effluent recycling amount of wherein said little oxygen section is identical with the flooding quantity that step 1 adds industrial waste water with high ammoniac nitrogen, wherein, the HRT of little oxygen section is 1.5h～2.5h, and DO is 0.3mg/L～1mg/L;
Four, the waste water after the little oxygen section of step 3 is handled, enter aerobic section after in medium sediment pool, stopping 20min～40min, carry out oxidation and nitration reaction, reacted nitrification liquid 90%～110% is back to anoxic pond, wherein said nitrification liquid quantity of reflux is identical with the flooding quantity that step 1 adds industrial waste water with high ammoniac nitrogen, wherein HRT is 5.5h～6.5h in the aerobic section, and DO is 2mg/L～4mg/L;
Five, remaining nitrification liquid entered second pond after step 4 refluxed, the post precipitation discharging, and wherein the HRT of second pond is 1.5h～2.5h;
Six, the mud of second pond discharge is back to anoxic pond, and wherein reflux ratio is 20%～50%, discharges after the back excess sludge that refluxes advances subsequent disposal, namely finishes AO 2Handle the process of industrial waste water with high ammoniac nitrogen.
The theoretical basis of technical solution of the present invention: the Sewage treatment systems that the inventive method adopts comprises: pump sump, biochemical system and second pond, wherein biochemical system comprises: anoxic pond, little oxygen pond and Aerobic Pond.
In recent years, nitrogenous compound causes the phenomenon of water pollution and water quality eutrophication serious day by day.In the face of the global wastewater discharge standard of strictness day by day, the energy-efficient denitrogenation of waste water technology of development and application has become the research focus in current water pollution control field.In 20 end of the centurys, the wastewater biological denitrificaion latest development has broken through traditional theoretical and understanding, and some results of study show, can
Figure BDA00003430026100041
Be oxidized to
Figure BDA00003430026100042
After directly carry out anti-nitration reaction, Here it is part nitration denitrification.
The process of biological denitrificaion comprises two stages of nitrification and denitrification, and nitrifying process mainly contains two kinds of microorganisms and forms ammonia oxidation bacteria (AOB) and nitrite nitrogen oxidation bacterium (NOB).And the theoretical core of part nitration denitrification is to make nitration reaction rest on the nitrosification stage, carries out denitrification denitrogenation subsequently.Therefore generally, the DO saturation constant of AOB is 0.3mg/L, and NOB is 1.1mg/L, as DO during less than 1mg/L, can utilize the dynamics difference of these two kinds of bacterium to achieve the goal.For realizing the part nitration denitrification of industrial waste water with high ammoniac nitrogen waste water, the dissolved oxygen in the control biological tank makes AOB become the dominant bacteria of nitrifier in active sludge, suppresses NOB, avoids the complete nitrification reaction.The new bio denitrification process AO of Ti Chuing on this basis 2Dissolved oxygen (DO) consumes greatly in the complete nitration denitrification of solution tradition, waste water self carbon source deficiency, and the high problem of processing costs that needs additional carbon and bring is particularly suitable for handling industrial waste water with high ammoniac nitrogen.
Present embodiment comprises following beneficial effect:
1, the generation cycle of ammonia oxidation bacteria (AOB) is shorter than nitrite nitrogen oxidation bacterium (NOB) generation cycle, proliferative speed is fast, control little oxygen pond the nitrosification stage subsequently denitrification denitrogenation can improve microorganism in the system with nitration reaction speed, shorten the nitration reaction time, thereby can reduce reactor volume, save initial cost;
2, according to the nitrosification bioprocesses, control can be saved nitrous acid nitrogen to the oxygen requirement of nitrate nitrogen and save the needed organic carbon source of a part of denitrification in the nitrosification stage, compare traditional technology, the part nitration denitrification can be saved 25% DO and 40% carbon source, the character that is fit to the low C/N of waste water, reduce additional carbon, can save working cost;
3, nitrite nitrogen is that nitrate nitrogen is 1.5～2 times of substrate as the denitrification rate of denitrification substrate, therefore saves 50% denitrification reactor volume, and in addition, sludge yield is low, the mud growing amount of minimizing 50% and the throwing alkali number in nitrated stage;
4, hold back AOB by medium sediment pool and be back to little oxygen pond, can guarantee the reaction system biomass, improve the nitrosification rate as much as possible, undesirable owing to relying on DO to control nitrosifying Continuous Flow operating performance merely simultaneously, realize that by the series connection Aerobic Pond oxidation of ammonia nitrogen is protected;
Embodiment two: what present embodiment and embodiment one were different is: the HRT of anoxic pond is 1.8h～2.2h in the step 2, and DO is 0.1mg/L～0.4mg/L.Other step is identical with embodiment one with parameter.
Embodiment three: what present embodiment and embodiment one were different is: the HRT of anoxic pond is 2h in the step 2, and DO is 0.25mg/L.Other step is identical with embodiment one with parameter.
Embodiment four: what present embodiment was different with one of embodiment one to three is: the HRT in little oxygen pond is 1.8h～2.2h in the step 3, and DO is 0.5mg/L～0.8mg/L, and nitrosification liquid 90%～110% is back to anoxic pond.Other step is identical with one of embodiment one to three with parameter.
Embodiment five: what present embodiment was different with one of embodiment one to three is: the HRT in little oxygen pond is 2h in the step 3, and DO is 0.6mg/L, and nitrosification liquid 100% is back to anoxic pond.Other step is identical with one of embodiment one to three with parameter.
Embodiment six: what present embodiment was different with one of embodiment one to five is: enter Aerobic Pond after stopping 25min～35min in the step 4 in medium sediment pool, Aerobic Pond HRT is 5.8h～6.2h, DO is 2.2mg/L～3.8mg/L, water outlet, and nitrification liquid 90%～110% is back to anoxic pond.Other step is identical with one of embodiment one to five with parameter.
Embodiment seven: what present embodiment was different with one of embodiment one to five is: enter Aerobic Pond after stopping 30min in the step 4 in medium sediment pool, Aerobic Pond HRT is 6h, and DO is 3mg/L, water outlet, and nitrification liquid 100% is back to anoxic pond.Other step is identical with one of embodiment one to five with parameter.
Embodiment eight: what present embodiment was different with one of embodiment one to seven is: the HRT of second pond is 1.8h～2.2h in the step 5.Other step is identical with one of embodiment one to seven with parameter.
Embodiment nine: what present embodiment was different with one of embodiment one to seven is: the HRT of second pond is 2h in the step 5.Other step is identical with one of embodiment one to seven with parameter.
Embodiment ten: what present embodiment was different with one of embodiment one to nine is: the mud part that second pond is discharged in the step 6 is back to anoxic pond, and reflux ratio is 30%～40%.Other step is identical with one of embodiment one to nine with parameter.
Embodiment 11: what present embodiment was different with one of embodiment one to nine is: the mud part that second pond is discharged in the step 6 is back to anoxic pond, and reflux ratio is 35%.Other step is identical with one of embodiment one to nine with parameter.
Verify beneficial effect of the present invention by following examples:
Embodiment 1
The AO of present embodiment 2Handling the method for industrial waste water with high ammoniac nitrogen carries out according to the following steps:
One, industrial waste water with high ammoniac nitrogen is mainly removed suspended matter and a part of organism in the sewage through pretreatment system, then enters pump sump, enters biochemical system through pump sump;
Two, the industrial waste water with high ammoniac nitrogen that enters biochemical system at first enters anoxic pond, and with the nitrosification liquid that refluxes, nitrification liquid and second pond returned sluge mix, and under the effect of stirring, reach complete admixture, and wherein the HRT of anoxic pond is 2h, and DO is 0.5mg/L;
Mainly carry out denitrification denitrogenation in the anoxic pond, the organism in nitrosification liquid and the nitrification liquid utilization water inlet is as carbon source;
Three, the waste water after step 2 is handled enters little oxygen section, under the stirring of little aerating system, ammonia nitrogen in the waste water can fully contact with AOB, water outlet 100% is back to anoxic pond, the effluent recycling amount of wherein said little oxygen section is identical with the flooding quantity that step 1 adds industrial waste water with high ammoniac nitrogen, the HRT of little oxygen section is 2h, and DO is 0.8mg/L;
Waste water is mainly used in realizing nitrosification in this section, for anoxic pond provides nitrosification liquid;
Four, the waste water after step 3 is handled, enter aerobic section after in medium sediment pool, stopping 30min, carry out oxidation and nitration reaction, reacted nitrification liquid 100% is back to anoxic pond, wherein said nitrification liquid quantity of reflux is identical with the flooding quantity that step 1 adds industrial waste water with high ammoniac nitrogen, wherein HRT is 6h in the Aerobic Pond, and DO is 2mg/L～4mg/L;
Medium sediment pool is mainly used in the quantity of the AOB of additional little oxygen section, and improving system's oxidation ammonia nitrogen is the ability of nitrite, reduces the ammonia nitrogen concentration of aerobic section, is conducive to the carrying out of nitrosation reaction;
Aerobic Pond can be removed remaining organism and be ammonia nitrogen and nitrous acid nitrogen transformation nitrate nitrogen, finishes nitration reaction;
Five, remaining nitrification liquid entered second pond after step 4 refluxed, the post precipitation discharging, and wherein the HRT of second pond is 2h;
Six, the mud of second pond discharge is back to anoxic pond, and reflux ratio is 35%, discharges after the back excess sludge that refluxes advances subsequent disposal; Namely finish AO 2Handle the process of industrial waste water with high ammoniac nitrogen.
The effect of present embodiment is as follows:
1, the generation cycle of ammonia oxidation bacteria (AOB) is shorter than nitrite nitrogen oxidation bacterium (NOB) generation cycle, proliferative speed is fast, control little oxygen pond the nitrosification stage subsequently denitrification denitrogenation can improve microorganism in the system with nitration reaction speed, shorten the nitration reaction time, thereby can reduce reactor volume, save initial cost;
2, according to the nitrosification bioprocesses, control can be saved nitrous acid nitrogen to the oxygen requirement of nitrate nitrogen and save the needed organic carbon source of a part of denitrification in the nitrosification stage, compare traditional technology, the part nitration denitrification can be saved 25% DO and 40% carbon source, the character that is fit to the low C/N of waste water, reduce additional carbon, can save working cost;
3, nitrite nitrogen is that nitrate nitrogen is 1.5～2 times of substrate as the denitrification rate of denitrification substrate, therefore saves 50% denitrification reactor volume, and in addition, sludge yield is low, the mud growing amount of minimizing 50% and the throwing alkali number in nitrated stage;
4, hold back AOB by medium sediment pool and be back to little oxygen pond, can guarantee the reaction system biomass, improve the nitrosification rate as much as possible, undesirable owing to relying on DO to control nitrosifying Continuous Flow operating performance merely simultaneously, realize that by the series connection Aerobic Pond oxidation of ammonia nitrogen is protected.

Claims (10)

1.AO2处理高氨氮工业废水的方法，其特征在于所述的处理方法是按以下步骤进行：1. AO 2 process the method for high ammonia nitrogen industrial waste water, it is characterized in that described processing method is to carry out according to the following steps: 一、高氨氮工业废水经预处理系统处理后，进入进水池，经进水池进入生化系统；1. After the high ammonia nitrogen industrial wastewater is treated by the pretreatment system, it enters the water inlet pool, and then enters the biochemical system through the water inlet pool; 二、进入生化系统的高氨氮工业废水首先进入缺氧池，与回流的亚硝化液，硝化液以及二沉池回流污泥混合，在搅拌的作用下，进行混合，其中缺氧池的HRT为1.5h～2.5h，DO为0mg/L～0.5mg/L；2. The high-ammonia-nitrogen industrial wastewater entering the biochemical system first enters the anoxic tank, mixes with the returning nitrosating liquid, nitrifying liquid and the return sludge of the secondary sedimentation tank, and mixes under the action of stirring. The HRT of the anoxic tank is: 1.5h～2.5h, DO is 0mg/L～0.5mg/L; 三、经步骤二处理后的废水进入微氧段，在微曝气系统的搅拌下，进行混合后，将微氧段的出水90%～110%回流至缺氧池内，其中所述的微氧段的出水回流量与步骤一加入高氨氮工业废水的进水量相同，其中，微氧段的HRT为1.5h～2.5h，DO为0.3mg/L～1mg/L；3. The wastewater treated in step 2 enters the micro-oxygen section, and after being mixed under the agitation of the micro-aeration system, 90% to 110% of the effluent from the micro-oxygen section is returned to the anoxic pool, wherein the micro-oxygen The effluent return flow of the section is the same as the inflow of high ammonia nitrogen industrial wastewater added in step 1, wherein the HRT of the micro-oxygen section is 1.5h to 2.5h, and the DO is 0.3mg/L to 1mg/L; 四、经步骤三微氧段处理后的废水，在中沉池内停留20min～40min后进入好氧段，进行氧化和硝化反应，反应后的硝化液90%～110%回流至缺氧池，其中所述的硝化液回流量与步骤一加入高氨氮工业废水的进水量相同，其中好氧段中HRT为5.5h～6.5h，DO为2mg/L～4mg/L；4. The waste water treated in the micro-oxygen section of step 3, stays in the middle sedimentation tank for 20min to 40min and then enters the aerobic section for oxidation and nitrification reactions. After the reaction, 90% to 110% of the nitrification liquid is returned to the anoxic tank, of which The reflux rate of the nitrifying liquid is the same as that of the high-ammonia-nitrogen industrial wastewater added in step 1, wherein the HRT in the aerobic section is 5.5h-6.5h, and the DO is 2mg/L-4mg/L; 五、步骤四回流后剩余的硝化液进入二沉池，沉淀后排放，其中二沉池的HRT为1.5h～2.5h；5. After the reflux in step 4, the remaining nitrification liquid enters the secondary settling tank, and is discharged after sedimentation. The HRT of the secondary settling tank is 1.5h to 2.5h; 六、二沉池排出的污泥回流至缺氧池，其中回流比为20%～50%，回流后剩余污泥进过后续处理后排放，即完成AO2处理高氨氮工业废水的过程。6. The sludge discharged from the secondary sedimentation tank is returned to the anoxic tank, and the reflux ratio is 20% to 50%. After the reflux, the remaining sludge is discharged after subsequent treatment, that is, the process of AO 2 treatment of high ammonia nitrogen industrial wastewater is completed. 2.如权利要求1所述的AO2处理高氨氮工业废水的方法，其特征在于步骤二中所述的缺氧池的HRT为1.8h～2.2h，DO为0.1mg/L～0.4mg/L。2. AO as claimed in claim 1 The method for treating high ammonia nitrogen industrial waste water, it is characterized in that the HRT of the anoxic pool described in step 2 is 1.8h～2.2h, DO is 0.1mg/L～0.4mg/ L. 3.如权利要求2所述的AO2处理高氨氮工业废水的方法，其特征在于步骤二中所述的缺氧池的HRT为2h，DO为0.25mg/L。3. AO as claimed in claim 2 The method for treating high ammonia nitrogen industrial waste water, it is characterized in that the HRT of the anoxic pond described in step 2 is 2h, and DO is 0.25mg/L. 4.如权利要求1所述的AO2处理高氨氮工业废水的方法，其特征在于步骤三中所述的微氧段的HRT为1.8h～2.2h，DO为0.5mg/L～0.8mg/L，且亚硝化液100%回流至缺氧池。4. AO as claimed in claim 1 The method for treating high-ammonia-nitrogen industrial wastewater is characterized in that the HRT of the micro-oxygen section described in step 3 is 1.8h～2.2h, and DO is 0.5mg/L～0.8mg/L L, and 100% of the nitrosating solution is returned to the anoxic pool. 5.如权利要求4所述的AO2处理高氨氮工业废水的方法，其特征在于步骤三中所述的微氧段的HRT为2h，DO为0.6mg/L，亚硝化液100%回流至缺氧池。5. AO as claimed in claim 4 The method for processing high ammonia nitrogen industrial waste water, it is characterized in that the HRT of the micro-oxygen section described in step 3 is 2h, and DO is 0.6mg/L, and 100% nitrosation liquid is backflowed to Anoxic pool. 6.如权利要求1所述的AO2处理高氨氮工业废水的方法，其特征在于步骤四中所述的在中沉池内停留25min～35min后进入好氧段，好氧段HRT为5.8h～6.2h，DO为2.2mg/L～3.8mg/L，硝化液100%回流至缺氧池。6. AO as claimed in claim 1 The method for treating high-ammonia-nitrogen industrial wastewater is characterized in that after staying in the intermediate sedimentation tank for 25min to 35min in step 4, it enters the aerobic section, and the HRT of the aerobic section is 5.8h～ 6.2h, DO is 2.2mg/L～3.8mg/L, and 100% of the nitrification solution is returned to the anoxic pool. 7.如权利要求6所述的AO2处理高氨氮工业废水的方法，其特征在于步骤四中在中所述的沉池内停留30min后进入好氧段，好氧段HRT为6h，DO为3mg/L，硝化液100%回流至缺氧池。7. AO as claimed in claim 6 The method for processing high ammonia-nitrogen industrial waste water, it is characterized in that step 4 enters the aerobic section after staying in the sedimentation tank described in 30min, the aerobic section HRT is 6h, and DO is 3mg /L, 100% of the nitrification solution is returned to the anoxic pool. 8.如权利要求1所述的AO2处理高氨氮工业废水的方法，其特征在于步骤五中所述的二沉池的HRT为1.8h～2.2h。8. The method for treating high-ammonia-nitrogen industrial wastewater with AO2 as claimed in claim 1, characterized in that the HRT of the secondary settling tank described in step 5 is 1.8h-2.2h. 9.如权利要求8所述的AO2处理高氨氮工业废水的方法，其特征在于步骤五中所述的二沉池的HRT为2h。9. AO as claimed in claim 8 The method for treating high ammonia nitrogen industrial waste water, it is characterized in that the HRT of the secondary settling tank described in step 5 is 2h. 10.如权利要求1所述的AO2处理高氨氮工业废水的方法，其特征在于步骤六中所述的二沉池排出的污泥回流至缺氧池，回流比为30%～40%。10. The method for treating high-ammonia-nitrogen industrial wastewater with AO2 as claimed in claim 1, characterized in that the sludge discharged from the secondary settling tank described in step 6 is returned to the anoxic tank, and the reflux ratio is 30% to 40%.
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CN109133513A (en) * 2018-09-12 2019-01-04 泰山学院 Septic tank wastewater recycling centralized processing system after a kind of transformation of rural pit toilet
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CN112645545A (en) * 2020-12-31 2021-04-13 福建恒嘉环保设备有限公司 Garbage transfer station leachate treatment system and treatment method thereof
CN112851052A (en) * 2021-03-24 2021-05-28 厦门中创水务有限公司 Automatic integrated OAO bioreactor

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