CN103241902A - Waste water biological treatment technology and biological treatment system using same - Google Patents
Waste water biological treatment technology and biological treatment system using same Download PDFInfo
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- CN103241902A CN103241902A CN201310190092XA CN201310190092A CN103241902A CN 103241902 A CN103241902 A CN 103241902A CN 201310190092X A CN201310190092X A CN 201310190092XA CN 201310190092 A CN201310190092 A CN 201310190092A CN 103241902 A CN103241902 A CN 103241902A
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Abstract
The invention discloses a waste water biological treatment technology. After passing through a pretreatment unit, waste water enters an aerobiotic unit for aerobic treatment under the action of a first adsorbent and activated sludge, then the mixture of the activated sludge and the first adsorbent is obtained; and the mixture flows back to the pretreatment unit and is taken as the adsorbent of the pretreatment unit for pretreatment of the waste water, wherein the mass concentration of the first adsorbent in the aerobiotic unit is between 50mg/L and 2000mg/L. The invention further provides an industrial waste water biological treatment system which comprises the pretreatment unit and a biochemical treatment unit, wherein the pretreatment unit comprises an adsorption pool, the biochemical treatment unit comprises an aerobiotic pool, the first adsorbent is added into the aerobiotic pool, and the mixture of the first adsorbent and the activated sludge in the aerobiotic pool is recycled by the adsorption pool. The amount of the adsorbent used by the industrial waste water biological treatment technology and the system is less, the treatment cost is low, the technology process is simple, the floor area is small, and the operation and management are simple.
Description
Technical field
The present invention relates to a kind of waste water treatment process, be specifically related to a kind of biological treatment of trade effluent and utilize the biological treatment system of this technology, belong to sewage treatment area.
Background technology
Trade effluent refers to the waste water, sewage and the waste liquid that produce in the Industrial processes, wherein contains the pollutent that produces in the industrial production materials, intermediate product and the product that lose with current and the production process.Along with developing rapidly of industry, kind and the quantity of waste water rapidly increase, and is also extensive and serious day by day to the pollution of water body, threatens human beings'health and safety.Therefore, for the protection environment, the processing of trade effluent is more even more important than municipal sewage treatment.
In the prior art, Chinese patent literature CN1454852A discloses a kind of Zeolite-bio combined adsorption regenerative sewage treating process, and this technology relates to removal and the processing of organism and the ammonia nitrogen of municipal effluent, sanitary sewage and industrial organic waste water; This technology realizes that to waste water the core cell of handling is adsorption tank, it is by adding zeolite or zeolite powder at adsorption tank, cultivate domestication through certain hour and form zeolite or zeolite powder mud, utilize the physics, chemistry of high density and highly active zeolite or zeolite powder mud, biological synergy, at adsorption tank internal adsorption pollutent, waste water through adsorption treatment is realized solid-liquid separation in settling tank, water outlet gets final product qualified discharge, and sorbent material reuse again after manipulation of regeneration of adding of adsorption tank.But the water outlet that this sewage treatment process is generally used for low concentration sewage ensures processing; And, put down in writing according to document embodiment, above-mentioned sewage treatment process is applicable to that into water COD is that 150mg/L, ammonia nitrogen are the processing of the sewage of low concentration about 30mg/L, even if handle the sewage of so low COD level, in order to realize the water outlet qualified discharge, its amount that need add zeolite or zeolite powder is 5000mg/L.
In the actual industrial environment, common COD concentration if adopt the operational path of putting down in writing in this patent documentation, can't arrive discharging up to standard up to the high-concentration industrial-water of 3000-5000mg/L with wastewater treatment; COD is that 3000mg/L is example with water inlet, under the certain situation of conditions such as initial COD Pressure, Concentration, Temperature, the loading capacity of zeolite is definite value, after the water inlet process one-level adsorption treatment, suppose that its water outlet COD reaches 2500mg/L, because the restriction of adsorption equilibrium, even continue to add new sorbent material in adsorption tank, water outlet COD can not descend yet again; In addition, suppose to adopt multistage absorption (a plurality of adsorption tanks are used in conjunction) to handle, 3000mg/L when adsorbing back COD by water inlet through one-level is reduced to 2500mg/L, COD reduces to 2000mg/L by 2500mg/L after secondary absorption (second adsorption tank handled) again, successively through three grades, after level Four etc. are handled, water outlet is reduced to 1600mg/L successively by 2000mg/L again, 1300mg/L, want qualified discharge then to need to be used in conjunction a plurality of adsorption tanks, and under the identical situation of other conditions, initial COD concentration is more low, the loading capacity of sorbent material is more low, the spoke degree that the water outlet COD of every grade of processing of process more backward descends is more little, this not only floor space increase, and the consumption of sorbent material also is countless.
In addition, utilize microorganism that zeolite or zeolite powder are carried out bio-regeneration, its running cost is higher, this is owing to passing through the isolated zeolite of settling tank or zeolite powder mud based on the inorganics zeolite, heavier to the wearing and tearing of transportation equipments such as pipeline and pump, therefore require very high to transportation equipment materials such as pump and pipelines, investment and the maintenance cost of easy increase equipment, therefore, above-mentioned waste water treatment process is to the Pollutant levels height, toxicity is big, and trade effluents such as the coal chemical industrial waste water of biodegradability difference, pharmacy waste water, dyeing waste water are also inapplicable.
Generally speaking, to the Pollutant levels height, toxicity is big, the coal chemical industrial waste water of biodegradability difference, pharmacy waste water, trade effluents such as dyeing waste water, treatment process commonly used can be divided into pre-treatment, biochemical treatment and aftertreatment three parts, but contain high density phenols organic pollutant in the trade effluent, toxic pollutants such as cyanogen pollutent, to the toxic shock action of Sludge System, cause problems such as sludge bulking easily, and general secondary biochemical water outlet COD and ammonia nitrogen are difficult to up to standard, need carry out advanced treatment, comprise electrochemical process, coagulant sedimentation, advanced oxidation processes, membrane separation process and absorption method etc.
Chinese patent literature CN101560045A discloses a kind of coal chemical industrial waste water treatment process, comprise coal chemical industrial waste water is carried out pre-treatment by air-floating apparatus, Fenton reagent is added pretreated waste water carry out secondary treatment, waste water after the secondary treatment is passed through the active sludge aeration tank, and advanced treatment is carried out at adding gac end in the pond, waste water after the advanced treatment is separated by ultra-filtration membrane, reuse water after obtaining separating, carry out reverse osmosis by the selectivity semi-permeable membranes again, obtain reuse water after the reverse osmosis and carry out namely finishing behind the evaporative crystallization processing to waste water.This technical scheme adds the activated carbon powder in the active sludge aeration tank, utilize organism and dissolved oxygen in the activity charcoal powder absorption waste water, but Fenton reagent, activated carbon, ultra-filtration membrane, reverse osmosis membrane price height, just the cycle of changing is short, cause processing cost to increase greatly, and technical process is long, floor space is big, the operational management complexity, pretreated Fenton oxidizing process complicated operation, the ultrafiltration of advanced treatment, reverse osmosis membrane assembly need often to clean and change, and cause operational management inconvenience.
Summary of the invention
The problem or the Industrial Wastewater Treatment cost that are unsuitable for the high-concentration organic industrial waste water processing for sorbent material consumption in the Industrial Wastewater Treatment process in the solution prior art greatly are big, technical process is long, floor space is big, the operational management complicated problems, and then provide that a kind of sorbent material consumption is few, processing cost is low, technical process is simple, floor space is little, the biological treatment system of the simple trade effluent of operational management.
For this reason, the technical scheme taked of the present invention is:
A kind of biological treatment of waste water comprises the steps: that waste water enters aerobic unit behind pretreatment unit, under first sorbent material and active sludge effect waste water is carried out aerobic treatment; Obtain the mixture of active sludge and first sorbent material after aerobic treatment, described mixture is back to described pretreatment unit and as the sorbent material of pretreatment unit waste water is carried out pre-treatment.
In the biological treatment of above-mentioned waste water, be 50mg/L to 2000mg/L in the mass concentration of first sorbent material described in the aerobic unit.
In the biological treatment of above-mentioned waste water, described first sorbent material is one or more in activated coke, semicoke and the brown coal.
In the biological treatment of above-mentioned waste water, comprise that also acidication handles, through the pretreated waste water acidification that at first is hydrolyzed, enter aerobic unit again and carry out aerobic treatment.
In the biological treatment of above-mentioned waste water, also comprise anaerobic treatment, through pretreated waste water be hydrolyzed successively acidification, anaerobic treatment, enter aerobic unit again and carry out aerobic treatment.
In the biological treatment of above-mentioned waste water, described aerobic unit comprises floated active sewage sludge reactors such as aerobic thermopnore, ordinary activated sludge aeration tank, sbr reactor pond, CASS aeration tank or oxidation ditch.
The present invention also provides a kind of biological treatment system of waste water, comprise pretreatment unit and biochemical treatment unit, described pretreatment unit comprises adsorption tank, described biochemical treatment unit comprises Aerobic Pond, added first sorbent material in the described Aerobic Pond, the mixture of the active sludge in wherein said first sorbent material and the Aerobic Pond is back to adsorption tank and as the sorbent material of adsorption tank waste water is carried out adsorption treatment.
In the biological treatment system of above-mentioned waste water, described first sorbent material is one or more in activated coke, semicoke and the brown coal, is 50mg/L to 2000mg/L in the mass concentration of first sorbent material described in the Aerobic Pond.
The biological treatment system of above-mentioned waste water also comprises hydrolysis acidification pool, and described adsorption tank, described hydrolysis acidification pool are connected along water (flow) direction successively with described Aerobic Pond.
The biological treatment system of above-mentioned waste water also comprises anoxic pond, and described adsorption tank, described hydrolysis acidification pool, described anoxic pond are connected along water (flow) direction successively with described Aerobic Pond.
In the biological treatment system of above-mentioned waste water, described Aerobic Pond is floated active sewage sludge reactors such as aerobic thermopnore, ordinary activated sludge aeration tank, sbr reactor pond, CASS aeration tank or oxidation ditch.
Compared with prior art, the present invention has following advantage:
(1) waste water treatment process of the present invention and biological treatment of waste water system, the excess sludge that aerobic unit is discharged and the mixture of first sorbent material are back to pretreatment stage and as sorbent material the former water of high-concentration industrial are carried out adsorption treatment.The mixing sludge that aerobic unit is discharged with first sorbent material be the core cohesion form compact, closely knit Black Liquor with Efficient Bacteria micelle, macromolecule contaminant in the former water and toxic pollutant are carried out flocculation sediment, reduce toxicant in the industrial former water and macromole hard-degraded substance to greatest extent to the influence of follow-up biochemical system, save the consumption of first sorbent material in the whole process treatment process, reduced running cost.
(2) biological process of wastewater treatment of the present invention and biological treatment of waste water system, in aerobic unit, add sorbent material, strengthened the removal effect of conventional activated sludge process, at first sorbent material is as microorganism carrier, form microbial film on the surface, realized that microorganism holds back, increased the effective microbe concentration in the reactor; Next microbial film that adheres to is followed successively by anaerobism, anoxic, aerobic microbiological from inside to outside, can carry out the classification degraded to the macromolecular substance of adsorbent common aerobic microbiological difficult degradation, also be equivalent to prolong simultaneously the duration of contact of microorganism and pollutent; Sorbent material is as the core of zoogloea cohesion in addition, form compact, closely knit Black Liquor with Efficient Bacteria micelle, increased microorganism active and concentration, the degradation capability of enhancement microbiological; The excess sludge that Aerobic Pond is discharged and the mixed-liquor return of sorbent material adsorb the former water of high-concentration industrial to the front end adsorption tank, and absorption back waste water enters biochemical system and handles, and mixing sludge is through discharge system behind the coagulating sedimentation.The mixing sludge that Aerobic Pond is discharged exists with zoogleic form, has good flocculence, can carry out flocculation sediment to the macromolecule contaminant in the former water, plays the effect of biological flocculant; The sorbent material of discharging at the bottom of the Aerobic Pond and the mixture of active sludge are refluxed and directly add sorbent material in the adsorption tank and compare, significantly reduced the sorbent material consumption, saved running cost, and the absorption coagulation that takes full advantage of mixture reduces toxicant in the industrial former water and macromole hard-degraded substance to greatest extent to the influence of follow-up biochemical system.
(3) mass concentration of first sorbent material is 50mg/L to 2000mg/L in biological process of wastewater treatment of the present invention and the biological treatment of waste water system, aerobic unit, and namely entering the waste water of aerobic unit and the mass ratio of first sorbent material is 20000:1 to 500:1.Make sorbent material and effectively combination of active sludge in the Aerobic Pond, avoid taking place the sorbent material dosage and make the active sludge suspension amount in the reactor too many very little, or the sorbent material dosage causes sorbent material that the phenomenon of precipitation takes place in reactor too much.
(4) sorbent materials such as activated coke, semicoke, brown coal are cheap, mesopore is flourishing, can effectively absorb macromole hard-degraded substance and toxic substance in the trade effluent, reduce trade effluent toxicity, improve the biodegradability of waste water, for subsequent biological treatment is created good condition.
(5) biological process of wastewater treatment of the present invention and biological treatment of waste water system also comprise the acidication processing, and larger molecular organics is changed into small organic molecule, improve the biodegradability of waste water.
Description of drawings
Content of the present invention is easier clearly to be understood in order to make, and below according to a particular embodiment of the invention and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the particular flow sheet of a kind of trade effluent biological treatment of the present invention;
Fig. 2 is the particular flow sheet of the another kind of trade effluent biological treatment of the present invention;
Fig. 3 is the particular flow sheet of Comparative Examples 1 water technology of the present invention;
Fig. 4 is the particular flow sheet of Comparative Examples 2 water technologies of the present invention;
Fig. 5 is the particular flow sheet of Comparative Examples 3 water technologies of the present invention.
Embodiment
Embodiment 1
Be illustrated in figure 1 as the schema of a kind of embodiment of trade effluent biological treatment system of the present invention, (1) trade effluent at first passes through adsorption tank, remove macromole hardly degraded organic substance and toxicant in the waste water, minimizing is to impact and the toxicity inhibition of follow-up biochemical system, and the sorbent material of employing is the excess sludge of Aerobic Pond backflow and the mixture of activated coke.(2) waste water after adsorption treatment enters biochemical system, and described waste water is carried out a biological disposal upon through hydrolysis acidification pool, anoxic pond, Aerobic Pond successively in the present embodiment.In Aerobic Pond, add activated coke, strengthen aerobic microbiological to organic degradation property in the waste water, guarantee the stable effluent quality qualified discharge, wherein the mass concentration of Aerobic Pond internal adsorption agent is that 100mg/L(is that the mass ratio of waste water and sorbent material is 10000:1 in the Aerobic Pond).Nitrification liquid is back to anoxic pond and carries out denitrification denitrogenation in the Aerobic Pond, the backflow water yield that wherein said Aerobic Pond is back to described anoxic pond is 2:1 with the ratio of the flooding quantity of described anoxic pond, the mixture of excess sludge and sorbent material all is back to adsorption tank the former water of industry is adsorbed, discharge system behind the mixing sludge coagulating sedimentation after the absorption.
Aerobic Pond is thermopnore in the present embodiment, described anoxic pond is complete hybrid activated sludge tank, and water inlet COD is 3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L, water outlet COD＜80mg/L, ammonia nitrogen＜5mg/L after treatment, total nitrogen＜30mg/L.Its COD clearance 〉=95%, ammonia nitrogen removal frank 〉=97%, nitrogen removal rate 〉=80%.Water outlet reaches the corresponding requirements in " recirculated cooling water reuse water water quality standard ".
Embodiment 2
The technical process of present embodiment is identical with technical process shown in Figure 1, (1) trade effluent at first passes through adsorption tank, remove macromole hardly degraded organic substance and toxicant in the waste water, minimizing is to impact and the toxicity inhibition of follow-up biochemical system, and the sorbent material of employing is the excess sludge alive of Aerobic Pond backflow and the mixture of activated coke.(2) waste water after adsorption treatment enters biochemical system, described waste water is carried out a biological disposal upon through hydrolysis acidification pool, anoxic pond, Aerobic Pond successively in the present embodiment, in Aerobic Pond, add activated coke, strengthen aerobic microbiological to organic degradation property in the waste water, guarantee the stable effluent quality qualified discharge, wherein the mass concentration of Aerobic Pond internal adsorption agent is that 50mg/L(is equivalent to namely that the mass ratio of waste water and sorbent material is 20000:1 in the Aerobic Pond), trade effluent water inlet COD concentration is 2000-3000mg/L.Nitrification liquid is back to anoxic pond and carries out denitrification denitrogenation in the Aerobic Pond, the backflow water yield that wherein said Aerobic Pond is back to described anoxic pond and the ratio of the flooding quantity of described anoxic pond are that the mixture of 2:1 excess sludge and sorbent material all is back to adsorption tank and the former water of industry is adsorbed discharge system behind the mixing sludge coagulating sedimentation after the absorption.
Aerobic Pond is thermopnore in the present embodiment, described anoxic pond is gallery formula activated sludge tank, and water inlet COD is 2000-3000mg/L, ammonia nitrogen 50-150mg/L, total nitrogen 100-200mg/L, water outlet COD＜80mg/L, ammonia nitrogen＜5mg/L after treatment, total nitrogen＜30mg/L.Its COD clearance 〉=95%, ammonia nitrogen removal frank 〉=97%, nitrogen removal rate 〉=80%.Water outlet reaches the corresponding requirements in " recirculated cooling water reuse water water quality standard ".
Embodiment 3
As shown in Figure 2, (1) trade effluent at first passes through adsorption tank, remove macromole hardly degraded organic substance and toxicant in the waste water, reduce impact and toxicity inhibition to follow-up biochemical system, the sorbent material of employing is the excess sludge of Aerobic Pond backflow and the mixture of brown coal.(2) waste water after adsorption treatment enters the AO system, and namely waste water is carried out a biological disposal upon through anoxic pond, Aerobic Pond successively.In Aerobic Pond, add brown coal, strengthen aerobic microbiological to organic degradation property in the waste water, guarantee the stable effluent quality qualified discharge, wherein the mass concentration of Aerobic Pond internal adsorption agent is that 2000mg/L(is equivalent to namely that the mass ratio of waste water and sorbent material is 500:1 in the Aerobic Pond).Nitrification liquid is back to anoxic pond and carries out denitrification denitrogenation in the Aerobic Pond, the backflow water yield that wherein said Aerobic Pond is back to described anoxic pond is 2:1 with the ratio of the flooding quantity of described anoxic pond, the mixture of excess sludge and sorbent material all is back to adsorption tank the former water of industry is adsorbed, discharge system behind the mixing sludge coagulating sedimentation after the absorption.
Aerobic Pond is thermopnore in the present embodiment, described anoxic pond is complete hybrid activated sludge tank, and water inlet COD is 3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L, water outlet COD＜80mg/L, ammonia nitrogen＜5mg/L after treatment, total nitrogen＜30mg/L.Its COD clearance 〉=95%, ammonia nitrogen removal frank 〉=97%, nitrogen removal rate 〉=80%.Water outlet reaches the corresponding requirements in " recirculated cooling water reuse water water quality standard ".
Embodiment 4
(1) trade effluent at first passes through adsorption tank, removes macromole hardly degraded organic substance and toxicant in the waste water, reduces impact and toxicity inhibition to follow-up biochemical system, and the sorbent material of employing is the excess sludge of Aerobic Pond backflow and the mixture of semicoke.(2) waste water after adsorption treatment enters biochemical system, and described waste water is carried out a biological disposal upon through hydrolysis acidification pool, anoxic pond, Aerobic Pond successively in the present embodiment.In Aerobic Pond, add semicoke, strengthen aerobic microbiological to organic degradation property in the waste water, guarantee the stable effluent quality qualified discharge, wherein the mass concentration of Aerobic Pond internal adsorption agent is that 1g/L(is that the mass ratio of waste water and sorbent material is 1000:1 in the Aerobic Pond).Nitrification liquid is back to anoxic pond and carries out denitrification denitrogenation in the Aerobic Pond, the backflow water yield that wherein said Aerobic Pond is back to described anoxic pond is 2:1 with the ratio of the flooding quantity of described anoxic pond, the mixture of excess sludge and sorbent material all is back to adsorption tank the former water of industry is adsorbed, discharge system behind the mixing sludge coagulating sedimentation after the absorption.
Aerobic Pond is oxidation ditch in the present embodiment, described anoxic pond is the plug-flow type active sludge pond, water inlet COD is 3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L, water outlet COD＜80mg/L, ammonia nitrogen＜5mg/L after treatment, total nitrogen＜30mg/L, water outlet reaches the corresponding requirements in " recirculated cooling water reuse water water quality standard ".
Embodiment 5
(1) trade effluent at first passes through adsorption tank, remove macromole hardly degraded organic substance and toxicant in the waste water, minimizing is to impact and the toxicity inhibition of follow-up biochemical system, and the sorbent material of employing is the active excess sludge of Aerobic Pond backflow and the mixture of brown coal.(2) waste water after adsorption treatment enters biochemical system, and described waste water is carried out a biological disposal upon through hydrolysis acidification pool, anoxic pond, Aerobic Pond successively in the present embodiment.Add brown coal in Aerobic Pond, strengthen aerobic microbiological to organic degradation property in the waste water, guarantee the stable effluent quality qualified discharge, wherein the mass concentration of Aerobic Pond internal adsorption agent is 1.2g/L.Nitrification liquid is back to anoxic pond and carries out denitrification denitrogenation in the Aerobic Pond, the backflow water yield that wherein said Aerobic Pond is back to described anoxic pond is 2:1 with the ratio of the flooding quantity of described anoxic pond, the mixture of excess sludge and sorbent material all is back to adsorption tank the former water of industry is adsorbed, discharge system behind the mixing sludge coagulating sedimentation after the absorption.
Aerobic Pond is the ordinary activated sludge aeration tank in the present embodiment, described anoxic pond is the plug-flow type active sludge pond, and water inlet COD is 3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L, water outlet COD＜80mg/L, ammonia nitrogen＜5mg/L after treatment, total nitrogen＜30mg/L.Water outlet reaches the corresponding requirements in " recirculated cooling water reuse water water quality standard ".
Comparative Examples 1
As shown in Figure 3, (1) trade effluent at first passes through adsorption tank, the sorbent material that adopts is activated coke, wherein the mass concentration of adsorption tank internal adsorption agent is that 10g/L(is equivalent to namely that the mass ratio of waste water and sorbent material is 100:1 in the Aerobic Pond), remove macromole hardly degraded organic substance and toxicant in the waste water, discharge system behind the mixing sludge coagulating sedimentation after the absorption.(2) waste water after adsorption treatment enters biochemical system, and described waste water is carried out a biological disposal upon through hydrolysis acidification pool, anoxic pond, Aerobic Pond successively in the present embodiment.Nitrification liquid is back to anoxic pond and carries out denitrification denitrogenation in the Aerobic Pond, and the backflow water yield that wherein said Aerobic Pond is back to described anoxic pond is 2:1 with the ratio of the flooding quantity of described anoxic pond, and active sludge is discharged at the bottom of by the Aerobic Pond pond in the Aerobic Pond.
Aerobic Pond is thermopnore in the present embodiment, described anoxic pond is complete hybrid activated sludge tank, and water inlet COD is 3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L, water outlet COD after treatment〉200mg/L, ammonia nitrogen〉30mg/L, total nitrogen〉60mg/L.
Comparative Examples 2
As shown in Figure 4, (1) trade effluent at first passes through adsorption tank, remove macromole hardly degraded organic substance and toxicant in the waste water, minimizing is to impact and the toxicity inhibition of follow-up biochemical system, the sorbent material that adopts is activated coke, wherein the mass concentration of adsorption tank internal adsorption agent is that 8g/L((is that the mass ratio of waste water and sorbent material is 125:1 in the adsorption tank)), discharge system behind the mixing sludge coagulating sedimentation after the absorption.(2) waste water after adsorption treatment enters biochemical system, and described waste water is carried out a biological disposal upon through hydrolysis acidification pool, anoxic pond, Aerobic Pond successively in the present embodiment.Add activated coke in Aerobic Pond, strengthen aerobic microbiological to organic degradation property in the waste water, wherein the mass concentration of Aerobic Pond internal adsorption agent is that 100mg/L(is that the mass ratio of waste water and sorbent material is 10000:1 in the Aerobic Pond).Nitrification liquid is back to anoxic pond and carries out denitrification denitrogenation in the Aerobic Pond, and the backflow water yield that wherein said Aerobic Pond is back to described anoxic pond is 2:1 with the ratio of the flooding quantity of described anoxic pond.
Aerobic Pond is thermopnore in the present embodiment, described anoxic pond is complete hybrid activated sludge tank, and water inlet COD is 3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L, water outlet COD＜80mg/L, ammonia nitrogen＜5mg/L after treatment, total nitrogen＜30mg/L.Water outlet reaches the corresponding requirements in " recirculated cooling water reuse water water quality standard ".
Comparative Examples 3
As shown in Figure 5, (1) trade effluent improves the biodegradability of waste water at first through hydrolysis acidification pool, larger molecular organics is changed into small organic molecule, through the waste water of acidication enter anoxic pond successively again, Aerobic Pond is carried out a biological disposal upon.Wherein in Aerobic Pond, add activated coke, strengthen aerobic microbiological to organic degradation property in the waste water, guarantee the stable effluent quality qualified discharge, wherein the mass concentration of Aerobic Pond internal adsorption agent is that 100mg/L(is that the mass ratio of waste water and sorbent material is 10000:1 in the Aerobic Pond).In the Aerobic Pond behind the mixing sludge coagulating sedimentation by discharging system at the bottom of the Aerobic Pond pond.Nitrification liquid is back to anoxic pond and carries out denitrification denitrogenation in the Aerobic Pond, and the backflow water yield that wherein said Aerobic Pond is back to described anoxic pond is 2:1 with the ratio of the flooding quantity of described anoxic pond.
Aerobic Pond is thermopnore in the present embodiment, described anoxic pond is complete hybrid activated sludge tank, water inlet COD is 3000-5000mg/L, ammonia nitrogen 50-200mg/L, total nitrogen 100-300mg/L, the index of intaking in the present embodiment is with embodiment 1, water outlet COD after treatment〉150mg/L, ammonia nitrogen〉5mg/L, total nitrogen〉30mg/L.
Can go out later on the contrast of Comparative Examples 1 and Comparative Examples 2 by embodiment 1, under identical main technology, add the position difference of sorbent material, and the mode difference of spoil disposal, the consumption of sorbent material is different fully under identical water inlet condition.Employing has added sorbent material to described Aerobic Pond, be back to adsorption tank from the sorbent material of Aerobic Pond discharge and the mixture of active sludge, the sorbent material that adsorption tank precipitation produces and the mixture of active sludge by the adsorption tank pond at the bottom of discharge, saved the consumption of sorbent material greatly.
Obviously, above-described embodiment only is for example clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being extended out thus or change still are among the protection domain of the invention.
Claims (11)
1. the biological treatment of a waste water comprises the steps:
Waste water enters aerobic unit behind pretreatment unit, under first sorbent material and active sludge effect waste water is carried out aerobic treatment;
Obtain the mixture of active sludge and first sorbent material after aerobic treatment, described mixture is back to described pretreatment unit and as the sorbent material of pretreatment unit waste water is carried out pre-treatment.
2. the biological treatment of waste water according to claim 1 is characterized in that, is 50mg/L to 2000mg/L in the mass concentration of first sorbent material described in the aerobic unit.
3. the biological treatment of waste water according to claim 1 and 2 is characterized in that, described first sorbent material is one or more in activated coke, semicoke and the brown coal.
4. according to the biological treatment of the arbitrary described waste water of claim 1-3, it is characterized in that, comprise that also acidication handles, through the pretreated waste water acidification that at first is hydrolyzed, enter aerobic unit again and carry out aerobic treatment.
5. the biological treatment of waste water according to claim 4 is characterized in that, also comprises anaerobic treatment, through pretreated waste water be hydrolyzed successively acidification, anaerobic treatment, enters aerobic unit again and carries out aerobic treatment.
6. the biological treatment of waste water according to claim 5 is characterized in that, described aerobic unit comprises aerobic thermopnore, ordinary activated sludge aeration tank, sbr reactor pond, CASS aeration tank or oxidation ditch.
7. the biological treatment system of a waste water comprises pretreatment unit and biochemical treatment unit, and described pretreatment unit comprises adsorption tank, and described biochemical treatment unit comprises Aerobic Pond, has added first sorbent material in the described Aerobic Pond, it is characterized in that,
The mixture of the active sludge in described first sorbent material and the Aerobic Pond is back to adsorption tank and as the sorbent material of adsorption tank waste water is carried out adsorption treatment.
8. the biological treatment system of waste water according to claim 7 is characterized in that, described first sorbent material is one or more in activated coke, semicoke and the brown coal, is 50mg/L to 2000mg/L in the mass concentration of first sorbent material described in the Aerobic Pond.
9. according to the biological treatment system of claim 7 or 8 described waste water, it is characterized in that, also comprise hydrolysis acidification pool, described adsorption tank, described hydrolysis acidification pool are connected along water (flow) direction successively with described Aerobic Pond.
10. the biological treatment system of waste water according to claim 9 is characterized in that, described biochemical treatment system also comprises anoxic pond, and described adsorption tank, described hydrolysis acidification pool, described anoxic pond are connected along water (flow) direction successively with described Aerobic Pond.
11. the biological treatment system of waste water according to claim 10 is characterized in that, described Aerobic Pond is aerobic thermopnore, ordinary activated sludge aeration tank, sbr reactor pond, CASS aeration tank or oxidation ditch.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104556372A (en) * | 2013-10-11 | 2015-04-29 | 中国石油化工股份有限公司 | Method for adsorption separation of organic matters by residual sludge |
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