CN106186320A - A kind of denitrification process of dyeing waste water - Google Patents

A kind of denitrification process of dyeing waste water Download PDF

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Publication number
CN106186320A
CN106186320A CN201610671749.8A CN201610671749A CN106186320A CN 106186320 A CN106186320 A CN 106186320A CN 201610671749 A CN201610671749 A CN 201610671749A CN 106186320 A CN106186320 A CN 106186320A
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denitrification
waste water
pond
fixed film
film reactor
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CN106186320B (en
Inventor
李超
操家顺
周仕华
薛朝霞
冯骞
方芳
费罗兰
虞筠霄
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Hohai University HHU
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C02F3/302—Nitrification and denitrification treatment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/16—Nitrogen compounds, e.g. ammonia
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/30—Organic compounds
    • C02F2101/308—Dyes; Colorants; Fluorescent agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/16—Total nitrogen (tkN-N)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/22—O2
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/04—Flow arrangements
    • C02F2301/046—Recirculation with an external loop
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/06—Sludge reduction, e.g. by lysis

Abstract

The invention discloses the denitrification process of a kind of dyeing waste water, comprise the steps: step 1, build the denitrification system of dyeing waste water: include anaerobic fixed film reactor, hypoxia pond, Aerobic Pond and the denitrification filter pool being sequentially communicated；Step 2, dyeing waste water to be degraded enters anaerobic fixed film reactor from the water inlet of anaerobic fixed film reactor, and the sewage 5～10% after hydrolysis is directly entered denitrification filter pool, and remainder flows into hypoxia pond；Step 3, sewage flows into through hypoxia pond again and carries out nitration treatment in Aerobic Pond, the excess sludge that Aerobic Pond produces, together with nitrification liquid in 25～35% ratio be back in anaerobic fixed film reactor, residue nitrification liquid flows in denitrification filter pool；Step 4, the mud mixture obtained through denitrification filter pool backwash in 15～25% ratio be also back to anaerobic fixed film reactor, residue sewage is after denitrification filters outside discharge system.The advantage that present invention process has high treating effect, sludge output is low, system footprint area is little and operation cost is low.

Description

A kind of denitrification process of dyeing waste water
Technical field
The present invention relates to the denitrification process of a kind of dyeing waste water, belong to technical field of waste water processing.
Background technology
Dyeing waste water is the waste water that nitrogen content is the highest, and the discharge beyond standards of nitrogenous effluent is the main cause causing water pollution One of, its harm bringing water body is mainly manifested in eutrophication, black and odorous water." urban wastewater treatment firm pollutant emission Standard " (GB18918-2002) to nitrogen, etc. the emission control of nutrient increasingly stricter, owing to employing in dyeing process Substantial amounts of dyestuff and auxiliary agent, including substantial amounts of azo dye and carbamide, this adds organic nitrogen in waste water to a certain extent Content.Existing denitrification process, such as A2/O, UCT, CASS/CAST, SBR etc., is all based on traditional denitrogenation and buries opinion, i.e. ammonia nitrogen Carrying out denitrification denitrogenation again after being converted into nitrate nitrogen with organic nitrogen, these are time not only oxygen consumption is many, and the longest, the most just lead Causing reaction tank volume to increase, investment and operating cost will uprise therewith.
In recent years, about utilizing the hydrolyzate VFAs (volatile fatty acid) the carbon source research as denitrification denitrogenation to get over Coming the most deep, this technology can save a large amount of expenses adding outer carbon source；It addition, about utilizing the acid of excess sludge anaerobic hydrolysis Changing product VFA and the technology for denitrification process the most gradually comes into one's own, this is possible not only to solve current residual sludge problem, and In the case of Organic substance in water deficiency, available mud produces VFA and is used as carbon source, improves the efficiency of biological carbon and phosphorous removal, Effectively reduce sanitary sewage disposal cost, improve effluent quality, thus obtain multiple benefits, have a good application prospect.
In terms of Short-distance nitrification denitrification nitrogen removal technology research, take off nitrogen studies about short-cut nitrification and denitrification at present main The sequencing batch reactor of SBR form is carried out with SHARON technique for processing the process of sludge-digestion liquid, rarely have employing even Afterflow carries out the report of short-cut nitrification and denitrification research；Immobilized microorganism technique is utilized to carry out SND as nearly next life more than ten years One of focus of thing denitrogenation area research, its method is to use fixation support that nitrifier and denitrifying bacterium are layered embedding or mixed Closing embedding, aerobic nitrification bacterium concentrates on outer layer, and denitrifying bacterium concentrates on internal layer, provides suitable bar respectively for nitrification and denitrification Part, but there is an obstacle in this technology, when microorganism activity after operation after a while of embedding can reduce, accordingly Biological denitrificaion performance can decline.
Therefore, how while combining short-cut denitrification technology and synchronous nitration and denitrification techniques save energy consumption, utilize VFAs builds the internal carbon source " low-carbon type " dyeing waste water strengthened denitrification system from dispensing, asks solving following dyeing waste water polluted by nitrogen Topic has critically important Research Significance.
Summary of the invention
Goal of the invention: the technical problem to be solved is to provide the denitrification process of a kind of dyeing waste water, this technique Not only ensure that effluent quality nitrogen content stably reaching standard, greatly reduce again system energy consumption, there is high treating effect, sludge output Low, system footprint area is little, effect stability and the low advantage of operation cost.
For solving above-mentioned technical problem, the technical solution adopted in the present invention is:
The denitrification process of a kind of dyeing waste water, comprises the steps:
Step 1, builds the denitrification system of dyeing waste water: the anaerobic fixed film reactor that includes being sequentially communicated, hypoxia pond, Aerobic Pond and Denitrification filter pool；
Step 2, dyeing waste water to be degraded enters anaerobic fixed film reactor from the water inlet of anaerobic fixed film reactor, the sewage after hydrolysis 5～10% are directly entered denitrification filter pool, and remainder flows into hypoxia pond；
Step 3, sewage flows into through hypoxia pond again and carries out nitration treatment in Aerobic Pond, the excess sludge that Aerobic Pond produces, even With nitrification liquid together in 25～35% ratio be back in anaerobic fixed film reactor, residue nitrification liquid flows in denitrification filter pool；
Step 4, the mud mixture obtained through denitrification filter pool backwash in 15～25% ratio be also back to anaerobism water Xie Chi, residue sewage is after denitrification filters outside discharge system.
Wherein, in step 1, described anaerobic fixed film reactor is connected with hypoxia pond, Aerobic Pond and denitrification filter pool simultaneously.
Wherein, in step 1, the dissolved oxygen concentration in described hypoxia pond is 0.5mg/L, so that hypoxia pond is at suppression Nitromonas Growth and activity while can also be enriched with nitration denitrification microorganism specially good effect flora.
Wherein, in step 1, described Aerobic Pond dissolved oxygen concentration is 2～3mg/L, so that Aerobic Pond energy fast culture is also Enrichment autotrophic type nitrifier.
Compared with prior art, technical solution of the present invention uses multi-path carbon source useless from the process printing and dyeing of dispensing system process Water, has the beneficial effect that
The anaerobic hydrolysis water of different proportion is flowed directly into denitrification filter pool according to actual water quality situation by present invention process In, on the one hand hydrolyzate VFAs (volatile fatty acid) can be utilized as the carbon source of denitrification denitrogenation, save outside adding The cost of carbon source, on the other hand, cuts down carbon, the reasonable of nitrogen pollutant by adjusting short flow feasible system, specifically, if It is big that dyeing waste water COD removes pressure, suitably turns down short flow, if dyeing waste water total nitrogen removes pressure greatly, suitably heightens short flow； It addition, present invention process excess sludge that a certain proportion of Aerobic Pond nitrification water is produced together with reaction and denitrification filter pool anti- Rinse mud mixture to be back in anaerobic fixed film reactor, on the one hand realize part denitrification process, the opposing party at anaerobic fixed film reactor Face can utilize excess sludge to produce VFA, it is ensured that supplementing of system carbon source, also realizes the minimizing of total system sludge yield；The present invention Technique uses the energy-saving Aerobic biological process technology of " hypoxia-aerobic " gradient oxygen supply, makes microorganism rationalization partition in system, fills Separating/enriching, it is achieved microorganism multiple-effect denitrogenation；Dyeing waste water denitrification process of the present invention has that high treating effect, sludge output be low, system Floor space is little, effect stability and the low remarkable advantage of operation cost, has promotional value.
Accompanying drawing explanation
Fig. 1 is the process chart of dyeing waste water denitrification process of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings and embodiment, technical scheme is described in further detail.
Embodiment 1
Embodiment 1 Central Plains water takes from certain printworks waste water, and waste water includes pre-treatment waste water and dyeing waste-water, and pre-treatment is given up The waste water composition that water is mainly produced by desizing, kiering, rinsing process, dyeing waste-water is mainly by giving up that dyeing, printing technology produce Water.The most pending dyeing waste water is the composite waste of two strands of waste water, and after mixing, waste water quality is shown in Table one.
Table one waste water, dyeing waste-water composite waste water quality index
Being entered in the denitrification system that present invention process builds by above-mentioned pending waste water, pending waste water sequentially passes through anaerobism Hydrolytic tank, hypoxia pond, Aerobic Pond, denitrification filter pool；Finding according to water quality characteristics, it is relatively big that dyeing waste water COD removes pressure, total nitrogen Remove pressure less, so carrying out following regulation and control: the water outlet of anaerobic fixed film reactor is straight in 5% ratio (crossing hypoxia pond and Aerobic Pond) Connect and flow into follow-up denitrification filter pool, the carbon source of high-quality is provided for denitrification filter pool；The excess sludge that Aerobic Pond produces, together with nitre Change liquid and be back to anaerobic fixed film reactor in 25% ratio together, the mud mixture additionally obtained through denitrification filter pool backwash by 15% ratio is back to anaerobic fixed film reactor, on the one hand realizes part denitrification process at anaerobic fixed film reactor, on the other hand residue dirt Mud, as anaerobic hydrolysis substrate, carries out supplementing of system internal carbon source；Wherein, control hypoxia pond dissolved oxygen concentration about 0.5mg/L, Growth and the activity of suppression Nitromonas while, it is enriched with nitration denitrification microorganism specially good effect flora；Control Aerobic Pond dissolved oxygen dense Degree 2～about 3mg/L, fast culture is also enriched with autotrophic type nitrifier.
Through microorganism culturing after a while and enrichment, after system run all right, the treatment effect of present invention process is: Denitrification filter pool average effluent COD be 134mg/L, TN meansigma methods be 3.7mg/L, COD clearance more than 93.6%, TN removes Rate is more than 87.6%.
Embodiment 2
Embodiment 2 Central Plains water takes from certain printworks waste water, and waste water includes pre-treatment waste water and dyeing waste-water, and pre-treatment is given up The waste water composition that water is mainly produced by desizing, kiering, rinsing process, dyeing waste-water is mainly by giving up that dyeing, printing technology produce Water.The most pending dyeing waste water is the composite waste of two strands of waste water, and after mixing, waste water quality is shown in Table two.
Table two waste water, dyeing waste-water composite waste water quality index
Being entered in the denitrification system that present invention process builds by above-mentioned pending waste water, pending waste water sequentially passes through anaerobism Hydrolytic tank, hypoxia pond, Aerobic Pond, denitrification filter pool；Finding according to water quality characteristics, it is less that dyeing waste water COD removes pressure, total nitrogen Remove pressure relatively big, so carrying out following regulation and control: the water outlet of anaerobic fixed film reactor is in 10% ratio (crossing hypoxia pond and Aerobic Pond) Flow directly into follow-up denitrification filter pool, the carbon source of high-quality is provided for denitrification filter pool；The excess sludge that Aerobic Pond produces, together with Nitrification liquid is back to anaerobic fixed film reactor in 35% ratio together, the mud mixture additionally obtained through denitrification filter pool backwash by 25% ratio is back to anaerobic fixed film reactor, on the one hand realizes part denitrification process at anaerobic fixed film reactor, on the other hand residue dirt Mud, as anaerobic hydrolysis substrate, carries out supplementing of system internal carbon source；Wherein, control hypoxia pond dissolved oxygen concentration about 0.5mg/L, Growth and the activity of suppression Nitromonas while, it is enriched with nitration denitrification microorganism specially good effect flora；Control Aerobic Pond dissolved oxygen dense Degree 2～about 3mg/L, fast culture is also enriched with autotrophic type nitrifier.
Through microorganism culturing after a while and enrichment, after system run all right, the treatment effect of present invention process is: Denitrification filter pool average effluent COD be 141mg/L, TN meansigma methods be 4.2mg/L, COD clearance more than 91.8%, TN removes Rate is more than 89.5%.
Dyeing waste water denitrification process of the present invention use hydrolysis acidification-hypoxia aerobic-denitrification filter pool combination mode, result table Bright: this technique is to COD in dyeing waste waterCrGood removal effect, final outflow water COD is had with total nitrogenCr＜ 150mg/L, total nitrogen ＜ 5mg/L, dyeing waste water denitrification process of the present invention, have water outlet high treating effect, sludge output is low, system footprint area is little, effect The remarkable advantages such as fruit is stable, operation cost is low, have promotional value very much.
In technique, anaerobic hydrolysis water outlet is the shortest flow to follow-up denitrification unit, it is achieved the carbon source optimizing of denitrification process Dispensing, consolidation system denitrogenation effect, save the expense of additional carbon；Technique can be according to waste water quality practical situation and carbon, nitrogen dirt The reduction demand of dye thing, by regulating and controlling the parameters such as short flow ratio rate, it is achieved system carbon, the reasonable reduction of nitrogen pollutant；Aerobic Pond and Denitrification filter pool mud mixture is back to anaerobic fixed film reactor, not only can realize denitrification, and excess sludge is as anaerobism Hydrolysis substrate, utilizes excess sludge to produce VFA, it is ensured that supplementing of system carbon source, and then the follow-up denitrifying capacity of consolidation system, simultaneously Also the minimizing of total system sludge yield is realized；Present invention process can also by microorganism rationalization partition in system, Each performs its own functions, fully Enrichment, it is achieved microorganism multiple-effect denitrogenation, while saving system oxygen-supplying amount, it is achieved cut the strengthening of nitrogen in dyeing waste water Subtract；Waste water processes through hypoxia section, and carbon source is to a certain degree consumed, and BOD (Biochemical oxygen demand) concentration entering hyperoxia section reduces, Be beneficial to growth and the fast enriching of autotrophic type nitrifier, i.e. system Nitrification is strengthened, and underload environment is beneficial to save Hyperoxia section aeration rate and HRT (hydraulic detention time), it is achieved the energy-saving consumption-reducing of system.
Obviously, above-described embodiment is only for clearly demonstrating example of the present invention, and not to the present invention The restriction of embodiment.For those of ordinary skill in the field, can also be made it on the basis of the above description The change of its multi-form or variation, here without also cannot all of embodiment be given exhaustive, these changes extended out Change or variation is also among protection scope of the present invention.

Claims (4)

1. the denitrification process of a dyeing waste water, it is characterised in that comprise the steps:
Step 1, builds the denitrification system of dyeing waste water: include anaerobic fixed film reactor, hypoxia pond, Aerobic Pond and the anti-nitre being sequentially communicated Change filter tank；
Step 2, dyeing waste water to be degraded enters anaerobic fixed film reactor from the water inlet of anaerobic fixed film reactor, sewage 5 after hydrolysis～ 10% is directly entered denitrification filter pool, and remainder flows into hypoxia pond；
Step 3, sewage flows into through hypoxia pond again and carries out nitration treatment in Aerobic Pond, and the excess sludge that Aerobic Pond produces, together with nitre Change liquid together in 25～35% ratio be back in anaerobic fixed film reactor, residue nitrification liquid flows in denitrification filter pool；
Step 4, the mud mixture obtained through denitrification filter pool backwash in 15～25% ratio be also back to anaerobic fixed film reactor, Residue sewage is after denitrification filters outside discharge system.
The denitrification process of dyeing waste water the most according to claim 1, it is characterised in that: in step 1, described anaerobic fixed film reactor It is connected with hypoxia pond, Aerobic Pond and denitrification filter pool simultaneously.
The denitrification process of dyeing waste water the most according to claim 1, it is characterised in that: in step 1, described hypoxia pond molten Solution oxygen concentration is 0.5mg/L.
The denitrification process of dyeing waste water the most according to claim 1, it is characterised in that: in step 1, described Aerobic Pond dissolves Oxygen concentration is 2～3mg/L.
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108373240A (en) * 2018-04-11 2018-08-07 东华大学 A kind of cotton dyeing waste water dual treatment and the integrated technique of reuse
CN109534615A (en) * 2018-12-26 2019-03-29 河北旭杰环境工程有限公司 The processing method of high ammonia-nitrogen wastewater
CN110759607A (en) * 2019-11-29 2020-02-07 浙江三点水环保工程有限公司 Process for removing total nitrogen from printing and dyeing wastewater
CN110835207A (en) * 2019-12-05 2020-02-25 吉康宁 Small-sized integrated domestic sewage treatment device and sewage treatment method
CN114538704A (en) * 2022-02-17 2022-05-27 广州昭合环保科技有限公司 Water treatment facilities based on synchronous nitrification and denitrification technique

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102502959A (en) * 2011-12-20 2012-06-20 同济大学 Process for enhancing denitrogenation of membrane bioreactor by anaerobic fermentation acid production
CN105585122A (en) * 2016-02-29 2016-05-18 湖州环境科技创新中心 High-ammonia-nitrogen low-C/N-ratio wastewater treatment system and treatment technique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102502959A (en) * 2011-12-20 2012-06-20 同济大学 Process for enhancing denitrogenation of membrane bioreactor by anaerobic fermentation acid production
CN105585122A (en) * 2016-02-29 2016-05-18 湖州环境科技创新中心 High-ammonia-nitrogen low-C/N-ratio wastewater treatment system and treatment technique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108373240A (en) * 2018-04-11 2018-08-07 东华大学 A kind of cotton dyeing waste water dual treatment and the integrated technique of reuse
CN108373240B (en) * 2018-04-11 2021-07-27 东华大学 Quality-based treatment and recycling integrated process for cotton printing and dyeing wastewater
CN109534615A (en) * 2018-12-26 2019-03-29 河北旭杰环境工程有限公司 The processing method of high ammonia-nitrogen wastewater
CN110759607A (en) * 2019-11-29 2020-02-07 浙江三点水环保工程有限公司 Process for removing total nitrogen from printing and dyeing wastewater
CN110759607B (en) * 2019-11-29 2022-07-29 浙江三点水环保工程有限公司 Process for removing total nitrogen from printing and dyeing wastewater
CN110835207A (en) * 2019-12-05 2020-02-25 吉康宁 Small-sized integrated domestic sewage treatment device and sewage treatment method
CN114538704A (en) * 2022-02-17 2022-05-27 广州昭合环保科技有限公司 Water treatment facilities based on synchronous nitrification and denitrification technique

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