CN105984991B - A kind of sewerage advanced treatment process - Google Patents

A kind of sewerage advanced treatment process Download PDF

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Publication number
CN105984991B
CN105984991B CN201510054611.9A CN201510054611A CN105984991B CN 105984991 B CN105984991 B CN 105984991B CN 201510054611 A CN201510054611 A CN 201510054611A CN 105984991 B CN105984991 B CN 105984991B
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water
baf
biofilter
aerobic
anoxic
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CN105984991A (en
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张卫东
魏国栋
张宁
姚俊
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JIANGSU ZONJIN ENVIRONMENT TECHNOLOGY Co Ltd
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JIANGSU ZONJIN ENVIRONMENT TECHNOLOGY Co Ltd
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Abstract

The invention discloses a kind of sewerage advanced treatment process, a variety of sewage disposal systems such as the process integration biofilter anoxic BAF, the aerobic biofilter BAF, ozone contact reaction pond and aerobic biofilter BAC.This process operating management is convenient, high degree of automation, low energy consumption, and handling the direct operating cost of water per ton is only 1.2 yuan/ton of waste water, can handle 200~20000 cubic metres of RO concentrated water daily, COD≤50mg/L is discharged after processing, NH3-N≤5mg/L, TN≤15mg/L, PH are 6~9, noresidue chlorine residue and other oxidizing substances in water, water outlet can directly qualified discharge or reuses.

Description

A kind of sewerage advanced treatment process
Technical field
The present invention relates to the sewage treatments of environment protection field, and in particular to a kind of to use the biofilter anoxic BAF+aerobic BAF The joint sewerage advanced treatment process of the biofilter+ozone contact reaction pond+biofilter aerobic BAC ".
Background technique
In the prior art, COD, NH are removed3There are many method of-N and total nitrogen, generally use A/O method, chemical oxidization method, Which kind of method the methods of BAF, BAC specifically use, need to be depending on specific water quality.A/O method is commonly except COD, denitrogenation side Method is chiefly used in handling the waste water of higher COD concentration, and waste water has certain biochemical;Chemical oxidization method, which is chiefly used in processing, to be had The processing of the very poor organic matter of the organic matter or biodegradability of toxicity, is not handled individually generally, the pretreatment for other techniques; There are many forms by BAF: anaerobism, anoxic, aerobic 3 kinds of forms are chiefly used in the advanced treating of waste water, have and preferably remove COD, denitrogenation Function is a kind of relatively new water process mode;BAC is a kind of microorganism and the novel water process work that active carbon combines Skill makes full use of the synergistic effect of microorganism and filler, can sufficiently remove COD, SS, NH in water removal3The pollutants such as-N and total nitrogen, Effluent quality is excellent, is mainly used for the advanced treating of difficult water.
Biological aerated filter BAF is a kind of fixed film phase reactor of high load capacity submerged, in late 1970s 20 The beginning of the eighties in century uses successfully in France first, is then promoted and applied on Europe, America, Japan and other places.Biology exposes Air filter pond is mainly characterized by using the lesser bulk material of partial size as filtrate, and filtrate is submerged in water, utilizes blast aeration Oxygen supply.The effect of filtrate can retain a large amount of microorganism first is that as microorganism carrier, especially when having ammonia nitrogen to deposit in waste water When, wherein the longer nitrifier of a large amount of generation times retained has vital effect to denitrogenation;Second is that can be used as Filter medium, the biosolids for retaining the suspended solid in water inlet and newly being formed, to save secondary in other biological facture Sedimentation basin obtains good water outlet.
When handling the RO concentrated water with salt content height, COD, TN high and B/C low (estimation is below 0.1), difficult biochemistry, because of water In organic pollutant passed through the biochemical system intensive treatment of prime, remaining COD shows to be difficult biochemical degradation, such as uses General A/O method handles it, then is difficult to gather effect, must carry out chemical oxidation treatment to it, improve the B/C ratio of waste water, and It is more suitable to carry out biochemical treatment again afterwards, to can ensure that standard water discharge is discharged, it is necessary to which searching can be to sewerage advanced treatment process.
Summary of the invention
It is raw using the biofilter anoxic BAF+aerobic BAF that in order to compensate for the shortcomings of the prior art, the present invention provides a kind of The joint sewerage advanced treatment process in the object filter tank+ozone contact reaction pond+biofilter aerobic BAC ".The technique includes following several A step:
1), RO concentrated water is cached in RO concentrated water pond, and regulating water quality and water;
2), the water outlet in RO concentrated water pond passes through water inlet manifold road system improving to the biofilter anoxic BAF, on the one hand, lacks Larger molecular organics in water are degraded to small organic molecule by the facultative hydrolysis acidification bacterium in the biofilter oxygen BAF, are improved useless The B/C ratio of water, another aspect denitrifying bacterium by waste water nitrate, Nitrite transformation at nitrogen, thus go water removal in TN and part COD;For normal growth, the metabolism for ensuring denitrifying bacterium, it is connected in RO concentrated water pond with the biofilter anoxic BAF Carbon source dosing system is provided on the pipeline of water inlet manifold road system;
3), the water outlet in the biofilter anoxic BAF is set the aerobic BAF water inlet pipe on the biofilter anoxic BAF top Road system enters the aerobic biofilter BAF, while being aerated air inlet pipe is the aerobic biofilter BAF aeration oxygen replenishing, utilizes aerobic BAF Organic pollutant COD degradation in water is water, the simple nothing of carbon dioxide by the metabolic activity of the aerobic microbiological in object filter tank Machine object;
4), water outlet a part of the aerobic biofilter BAF enters ozone contact by the aerobic biofilter BAF outlet pipeline Oxidation pond, another part are back to the biofilter anoxic BAF by nitrification liquid return line, carry out denitrification denitrogenation;In ozone In haptoreaction pond, using the strong oxidation of ozone, on the one hand long-chain difficult to degrade in water, heterocycle type organic are broken Chain, open loop are degraded to biochemical organic matter, remove conducive to depth of the rear class BAC to COD, another aspect ozone can also be by water In part COD directly or indirectly oxygenolysis Cheng Shui, carbon dioxide inorganic substances;
5), treated in O3 contacted oxidation pond water enters intermediate pool by O3 contacted oxidation pond outlet pipeline, will Remaining ozone resolves into oxygen in water, eliminates the influence to rear class biochemistry, and can provide oxygen source into water, plays preaeration Effect;
6), the water outlet of intermediate pool is raw into aerobic BAC through intermediate pool elevator pump and intermediate pool outlet pipeline system Object filter tank carries out biochemical reaction, further removes COD, NH in water removal3-N,TN;
7), the water outlet of the aerobic biofilter BAC enters discharge bay through the aerobic biofilter BAC outlet pipeline system, then It is discharged overflow qualified discharge.
Further, the filtrate in the biofilter anoxic BAF and the aerobic biofilter BAF be zeolite or haydite, Filtrate in the aerobic biofilter BAC is biological carbon leaching material.
Further, the biofilter anoxic BAF, the aerobic biofilter BAF, the aerobic biofilter BAC configure , it can be achieved that fully automatic operation, backwash etc. operate, the ozone contact reaction pond configuration is pneumatic for pneumatic operated valve, flowmeter, pressure gauge Valve, liquidometer, flowmeter, pressure gauge are, it can be achieved that fully automatic operation.
Further, the carbon source dosing system includes dosing metering pump, nutrient solution dissolution case, agitating device and magnetic turning plate Liquidometer.
Further, it is the quantity for ensuring dominant bacteria in the biofilter anoxic BAF, can be added when necessary into it appropriate Obligate bacterium, to increase the degradation to COD and the removal to nitrogen.
The biofilter the use anoxic BAF+biofilter aerobic BAF+ozone contact reaction pond of the invention+aerobic BAC is raw The joint sewerage advanced treatment process in object filter tank " has the advantages that
One, process flow is short, occupied area is small, can handle 200~20000 cubic metres of RO concentrated water daily, when water inlet water Matter is COD≤350mg/L, NH3- N≤35g/L, TN≤60mg/L, when PH6~9, system effluent quality energy stably reaching standard, i.e., COD≤50mg/L, NH3- N≤5mg/L, TN≤15mg/L, PH are 6~9, and water outlet can direct qualified discharge;
Two, this technological operation is simple, operational management is convenient, and high degree of automation, no sludge generates, and system equipment need to only be determined Phase backwash;
Three, this technique electricity consumption is few, and low energy consumption, and handling the direct operating cost of water per ton is only 0.924 yuan+medicament expense of the electricity charge With 0.284 yuan=1.2 yuan/ton waste water.
Detailed description of the invention
Attached drawing is used to provide further understanding of the present invention, and constitutes part of specification, with type of the present invention Embodiment is used to explain the present invention together, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is process flow chart of the invention.
Specific embodiment
Hereinafter, preferred embodiments of the present invention will be described, it should be understood that preferred embodiment described herein is only used In the description and interpretation present invention, it is not intended to limit the present invention.
A kind of sewerage advanced treatment process, including the following steps:
1), RO concentrated water is cached in RO concentrated water pond 1, and regulating water quality and water;
2), the water outlet in RO concentrated water pond 1 is promoted to the biofilter anoxic BAF 2, a side by water inlet manifold road system 20 Larger molecular organics in water are degraded to small organic molecule by face, the facultative hydrolysis acidification bacterium in the biofilter anoxic BAF 2, Improve waste water B/C ratio, another aspect denitrifying bacterium by waste water nitrate, Nitrite transformation at nitrogen, to remove TN and part COD in water;To ensure the normal growth of denitrifying bacterium, being metabolized, in RO concentrated water pond 1 and the biofilter anoxic BAF 2 Carbon source dosing system 22 is provided on the pipeline for the water inlet manifold road system 20 being connected;
3), the water outlet in the biofilter anoxic BAF 2 is set the aerobic BAF water inlet on 2 top of the biofilter anoxic BAF Pipe-line system 3 enters the aerobic biofilter BAF 4, while being aerated air inlet pipe 18 is aerobic 4 aeration oxygen replenishing of the biofilter BAF, is utilized Organic pollutant COD degradation in water is water, carbon dioxide by the metabolic activity of the aerobic microbiological in aerobic BAF object filter tank 3 Simple inorganic matter;
4), water outlet a part of the aerobic biofilter BAF 3 is connect by the aerobic biofilter BAF outlet pipeline 6 into ozone Oxidation pond 7 is touched, another part is back to the biofilter anoxic BAF 2 by nitrification liquid return line 19, carries out denitrification denitrogenation; It is on the one hand that long-chain difficult to degrade in water, heterocyclic is organic using the strong oxidation of ozone in ozone contact reaction pond 7 Object carries out chain rupture, open loop, is degraded to biochemical organic matter, removes conducive to depth of the rear class BAC to COD, another aspect ozone It can also be by the part COD in water directly or indirectly oxygenolysis Cheng Shui, carbon dioxide inorganic substances;
5), treated in O3 contacted oxidation pond 7 water enters intermediate pool by O3 contacted oxidation pond outlet pipeline 10 11, ozone remaining in water is resolved into oxygen, the influence to rear class biochemistry is eliminated, and oxygen source can be provided into water, plays pre- The effect of aeration;
6), the water outlet of intermediate pool 11 enters aerobic through intermediate pool elevator pump 12 and intermediate pool outlet pipeline system 13 The biofilter BAC 14 carries out biochemical reaction, further removes COD, NH in water removal3-N,TN;
7), the water outlet of the aerobic biofilter BAC 14 enters discharge bay through the aerobic biofilter BAC outlet pipeline system 15 16, then it is discharged overflow qualified discharge.
Wherein the specification in RO concentrated water pond is 6m × 6m × 5m, and dischargeable capacity is 200 cubic metres, and material is steel concrete;RO concentrated water Pond is configured with 1 set of ultrasonic level gage;The specification of the biofilter anoxic BAF and the aerobic biofilter BAF be 7.5m × 3.5m × 6.5m, effective stay time are 3h or so, 115 cubic metres of filler;The dischargeable capacity in ozone contact reaction pond is 100 cubic metres, Effective stay time is 1h or so, 3 sets of micro-hole aerator configured with ceramic diamond spar material, the aeration general pipeline 3 of SS304 material Set, tail gas collection system, water distribution system;The dischargeable capacity of intermediate pool is 150 cubic metres, and effective stay time is 1.5h left It is right;The specification of the biofilter BAC is 7.5m × 3.5m × 5.5m, and effective stay time is 2h or so, is provided with 115 cubes of filler Rice;The dischargeable capacity for discharging pond is 300 cubic metres.
The direct operating cost of this technique is only mainly 1.2 yuan/ton of waste water by power consumption and reagent consumption, and wherein the electricity charge (are pressed 0.6 yuan/KW meter), then handle water power consumption per ton are as follows: 154 × 0.6 ÷ 100=0.924 yuan/ton waste water;
Medicament expense:
A, methanol (being calculated by 2.3 yuan/Kg, dosage is based on 80mg/L): 0.08 × 2.3=0.184 yuan/ton of water
B, other medicament expenses about (such as nutritional agents, microbial inoculum): 0.1 yuan
It is total then to handle the direct operating cost of water per ton are as follows:
0.924+0.1+0.184=1.2 yuan/ton of waste water.
When influent quality is COD≤350mg/L, NH3- N≤35g/L, TN≤60mg/L, when PH6~9, by this system After processing, effluent quality COD≤50mg/L, NH3- N≤5mg/L, TN≤15mg/L, PH are 6~9, and water outlet can direct row up to standard It puts or reuse.
Finally, it should be noted that the foregoing is only a preferred embodiment of the present invention, it is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features. All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims (4)

1. a kind of sewerage advanced treatment process, which is characterized in that including the following steps:
1), RO concentrated water is cached in RO concentrated water pond, and regulating water quality and water;
2), the water outlet in RO concentrated water pond passes through water inlet manifold road system improving to the biofilter anoxic BAF, on the one hand, anoxic BAF Larger molecular organics in water are degraded to small organic molecule by the facultative hydrolysis acidification bacterium in biofilter, improve the B/ of waste water C ratio, another aspect denitrifying bacterium by waste water nitrate, Nitrite transformation at nitrogen, thus go water removal in TN and portion Divide COD;To ensure the normal growth of denitrifying bacterium, being metabolized, in total water inlet that RO concentrated water pond is connected with the biofilter anoxic BAF Carbon source dosing system is provided on the pipeline of pipe-line system;
3), the water outlet in the biofilter anoxic BAF is set the aerobic BAF inlet pipeline system on the biofilter anoxic BAF top System enters the aerobic biofilter BAF, while being aerated air inlet pipe is the aerobic biofilter BAF aeration oxygen replenishing, is filtered using aerobic BAF object Organic pollutant COD degradation in water is that water, carbon dioxide are simply inorganic by the metabolic activity of the aerobic microbiological in pond Object;
4), water outlet a part of the aerobic biofilter BAF enters O3 contacted oxidation by the aerobic biofilter BAF outlet pipeline Pond, another part are back to the biofilter anoxic BAF by nitrification liquid return line, carry out denitrification denitrogenation;It is contacted in ozone In reaction tank, using the strong oxidation of ozone, on the one hand by long-chain difficult to degrade in water, heterocycle type organic carry out chain rupture, Open loop is degraded to biochemical organic matter, removes conducive to rear class BAC to the depth of COD, and another aspect ozone can also will be in water Part COD directly or indirectly oxygenolysis Cheng Shui, carbon dioxide inorganic substances;
5), treated in O3 contacted oxidation pond water enters intermediate pool by O3 contacted oxidation pond outlet pipeline, will be in water Remaining ozone resolves into oxygen, eliminates the influence to rear class biochemistry, and can provide oxygen source into water, plays the function of preaeration Effect;
6), the water outlet of intermediate pool enters aerobic BAC biological filter through intermediate pool elevator pump and intermediate pool outlet pipeline system Pond carries out biochemical reaction, further removes COD, NH in water removal3-N,TN;
7), the water outlet of the aerobic biofilter BAC enters discharge bay through the aerobic biofilter BAC outlet pipeline system, is then discharged Overflow qualified discharge.
2. a kind of sewerage advanced treatment process as described in claim 1, which is characterized in that the biofilter anoxic BAF It is zeolite or haydite with the filtrate in the aerobic biofilter BAF.
3. a kind of sewerage advanced treatment process as described in claim 1, which is characterized in that the aerobic biofilter BAC In filtrate be biological carbon leaching material.
4. a kind of sewerage advanced treatment process as described in claim 1, which is characterized in that periodically to the biofilter anoxic BAF Obligate bacterium is inside added, the obligate bacterium is the flora that can increase degradation and the removal to nitrogen of COD after taming.
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CN106865908A (en) * 2017-03-31 2017-06-20 大连碧水蓝天环保科技工程有限公司 The processing system and processing method of a kind of waster water of alkaline residul from oil refinery
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CN103253824A (en) * 2013-05-03 2013-08-21 华南理工大学 Method for treating cyanogen-containing electroplating wastewater by combining ozone and biological aerated filter
CN104261640A (en) * 2014-10-24 2015-01-07 中国地质大学(北京) Treatment equipment of non-degradable organic wastewater with high concentration

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JP2697561B2 (en) * 1993-02-03 1998-01-14 日立化成工業株式会社 Sewage septic tank
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CN102491588A (en) * 2011-12-06 2012-06-13 上海广联建设发展有限公司 Method and device for sewage treatment
CN103253824A (en) * 2013-05-03 2013-08-21 华南理工大学 Method for treating cyanogen-containing electroplating wastewater by combining ozone and biological aerated filter
CN104261640A (en) * 2014-10-24 2015-01-07 中国地质大学(北京) Treatment equipment of non-degradable organic wastewater with high concentration

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