CN108083581A - A kind of low energy consumption autotrophic denitrification municipal sewage system and method - Google Patents

A kind of low energy consumption autotrophic denitrification municipal sewage system and method Download PDF

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CN108083581A
CN108083581A CN201711464238.XA CN201711464238A CN108083581A CN 108083581 A CN108083581 A CN 108083581A CN 201711464238 A CN201711464238 A CN 201711464238A CN 108083581 A CN108083581 A CN 108083581A
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tank
water
anaerobism
chemical dephosphorization
mud
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CN108083581B (en
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吴绍斌
刘希强
邱国勤
姚义
付长明
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Beijing Sound Environmental Engineering Co Ltd
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F2001/007—Processes including a sedimentation step
    • 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
    • C02F2101/105—Phosphorus compounds
    • 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
    • C02F2101/38—Organic compounds containing nitrogen
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/007—Modular design
    • 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
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • 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
    • C02F3/28—Anaerobic digestion processes
    • C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
    • 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

Abstract

The invention discloses a kind of low energy consumption autotrophic denitrification municipal sewage systems and method, system to include：Anaerobism decarburizing reaction device desilts tank, self-supported denitrification reactor, settling tank, chemical dephosphorization agitator tank, chemical dephosphorization settling tank, tourie, chemical dephosphorization chemicals dosing plant, micro- aerator and water-distributing device.Method includes：Anaerobic environment removal overwhelming majority BOD is first passed through, organic nitrogen is made to be converted into ammonia nitrogen, and releases phosphorus；Enter autotrophic denitrification after removing suspended matter, aeration CANON reactors carry out partial nitrification and Anammox by integrally declining, to reach autotrophic denitrification effect；Then final process effect is reached by chemical dephosphorization, realizes anaerobism except carbon adds autotrophic denitrification that chemical dephosphorization is added to handle municipal wastewater.The system and method handles municipal wastewater by anaerobism, micro- oxygen environment, can substantially reduce the aeration energy consumption of traditional handicraft, while the surplus sludge volume of anaerobic technique is relatively low, saves excess sludge disposal and takes, cuts operating costs.

Description

A kind of low energy consumption autotrophic denitrification municipal sewage system and method
Technical field
The present invention relates to sewage treatment field more particularly to a kind of low energy consumption autotrophic denitrification municipal sewage system and sides Method.
Background technology
Municipal wastewater treatment technology has been developed more than 100 years, existing many highly developed municipal wastewater processing works Skill, such as oxidation ditch, SBR, A2O etc..But these existing maturation process mainly (contain anaerobism and simultaneous using aerobic activated sludge process Oxygen region), it is necessary to be largely aerated to sewage, energy consumption is higher；In addition, microbial growth speed in aerobic activated sludge technique Rate is fast, generates a large amount of excess sludges, and excess sludge not only aggravates environmental pressure, the operation of sewage treatment plant is also greatly improved Cost；In addition, the C/N of municipal wastewater is compared for traditional denitrification process based on nitration denitrification, in denitrification link carbon source It is slightly insufficient, cause water outlet total nitrogen higher.
It is alive with the Wageningen University professor Ka Cilaitingge (Gatze Lettinga) that anaerobic technology is famous Boundary various regions establish the Engineering Projects of some UASB reactors (i.e. anaerobism decarburizing reaction device) processing municipal wastewater (sanitary sewage), It is good that these anaerobism engineerings show that anaerobic technology has the municipal wastewater for removing low COD concentration after a period of time is run Effect has reached 50~80%, BOD removal rates with raw water quality difference COD removal rates and has reached 70~80%, is reacted in UASB Device is followed by the biochemical process such as oxidation pond, has reached preferable treatment effect.But oxidation pond hydraulic detention time is up to 1 in the technique My god, whole hydraulic detention time is long, takes up a large area；And UASB reactors are followed by traditional nitration denitrification technique, then anti-nitre Change link and there are problems that carbon source wretched insufficiency.
Anammox is the new autotrophic denitrification technique that organic carbon source (COD) is not required in one kind.Dutch Paques B. V. exists The plum blossom monosodium glutamate of Tongliao, Inner Mongolia has built occupation of land 6700m3ANAMMOX bioreactors, processing food additives production is useless Water, ammonia nitrogen concentration has reached more than 95% higher than 600mg/L, ammonia nitrogen removal efficiency in waste water.Ammonia nitrogen in water is subjected to anaerobism ammonia Oxidation reaction, it is necessary to 50~60% ammonia nitrogen carry out nitrosation, that is, form nitrite nitrogen and ammonia nitrogen about 1.0~1.3:1.0 ratio Example relation.2002, Dutch Deft polytechnical universities proposed the complete autotrophic denitrification CANON techniques based on nitrite (completely autotrophic nitrogen removal over nitrite), basic principle is aerobic ammonia oxidation About 50% ammonium oxidation is nitrite nitrogen under aerobic conditions by bacterium (Nitrosomas), and anaerobic ammonia oxidizing bacteria is then under anaerobic Ammonia and nitrous acid are converted into nitrogen, realize nitrogen removal purpose.Since Nitrosomas and anaerobic ammonia oxidizing bacteria are all autotrophic types Bacterium, therefore the technique can carry out under the conditions of inorganic or low COD.On the other hand, Nitrosomas needs oxygen, and anaerobism Ammonia oxidation bacteria is to oxygen sensitive, therefore CANON techniques must be implemented in low-oxygen environment.Sliekers et al. is gentle using batch-type It carries two kinds of reactors of formula and small-scale trial operation has been carried out to CANON techniques, as a result well, but municipal wastewater is for CANON techniques For, there are organic carbon source concentration it is too high the problem of.
The content of the invention
Based on the problems of prior art, the object of the present invention is to provide a kind of low energy consumption autotrophic denitrification municipal wastewaters Processing system and method, can high energy consumption, sludge yield existing for existing conventional municipal sewage treatment process be big, water outlet total nitrogen is exceeded The problems such as.
The purpose of the present invention is what is be achieved through the following technical solutions：
Embodiment of the present invention provides a kind of low energy consumption autotrophic denitrification municipal sewage system, including：
Anaerobism decarburizing reaction device desilts tank, self-supported denitrification reactor, settling tank, chemical dephosphorization agitator tank, chemical dephosphorization and sinks Shallow lake tank, tourie, chemical dephosphorization chemicals dosing plant, micro- aerator and water-distributing device；Wherein,
The anaerobism decarburizing reaction device is equipped with total water inlet, and the water outlet of the anaerobism decarburizing reaction device, which is sequentially connected with, to be desilted Tank, self-supported denitrification reactor, settling tank, chemical dephosphorization agitator tank and chemical dephosphorization settling tank, the chemical dephosphorization settling tank are set There is total water outlet；
The tourie is connected with the biogas mouth at the top of the anaerobism decarburizing reaction device；
Micro- aerator and water-distributing device are each provided at the bottom in the self-supported denitrification reactor, the water-distributing device It is connected with the water inlet of the self-supported denitrification reactor；
The chemical dephosphorization chemicals dosing plant is connected with the chemical dephosphorization agitator tank；
Described to desilt equipped with mud scum device is scraped in tank, this desilts tank top and is equipped with mud discharging mouth equipped with mud mud discharging mouth, bottom is scraped；
Tail gas overfall is equipped at the top of the self-supported denitrification reactor；
The precipitation pot bottom is equipped with mud discharging mouth, which returns through mud return line is connected to the autotrophic denitrification reaction Device；
The chemical dephosphorization precipitation pot bottom is equipped with mud discharging mouth.
Embodiment of the present invention also provides a kind of low energy consumption autotrophic denitrification municipal wastewater processing method, and use is of the present invention Low energy consumption autotrophic denitrification municipal sewage system, comprise the following steps：
The anaerobism decarburizing reaction device of raw water into the processing system after physics coagulation carries out anaerobism except at carbon Reason removes the part COD in sewage, organic nitrogen is partially converted into ammonia nitrogen, organophosphor is converted into inorganic phosphate radical ion；
The biogas generated during the anaerobism decarburizing reaction device anaerobism carbon removal treatment is absorbed by tourie；
The water outlet well water of the anaerobism decarburizing reaction device is desilted by floating and sinking to carrying out mud-water separation in tank, after separation Clear water gravity flow into self-supported denitrification reactor, arranged outside sludge；
It is formed in agitaion and micro- oxygen environment and carried out under the effect of micro- aerator in the self-supported denitrification reactor Reaction, 50~60% mineralized nitrogen are nitrite nitrogen, and Anammox reaction occurs with remaining ammonia nitrogen, generate nitrogen and a small amount of Nitrate nitrogen, nitrogen are discharged through tail gas overfall, and nitrate nitrogen occurs anti-nitration reaction with rest COD and completes denitrogenation and COD removals；
The water outlet of the self-supported denitrification reactor enters settling tank and carries out mud-water separation, and the settling tank takes off to the autotrophy Returned sludge in Analysis；
After the Dephosphorization reagent mixing that the water outlet of the settling tank and chemical dephosphorization chemicals dosing plant add in, stirred into chemical dephosphorization It mixes tank and carries out quick stirring and form rich phosphorus precipitation, precipitate the clear water isolated and enter chemical dephosphorization settling tank and precipitated, muddy water Water outlet after separation.
As seen from the above technical solution provided by the invention, low energy consumption autotrophic denitrification city provided in an embodiment of the present invention Political affairs sewage disposal system and method, its advantage are：
By by anaerobism decarburizing reaction device, desilt tank, self-supported denitrification reactor, settling tank, chemical dephosphorization agitator tank, chemistry Dephosphorization settling tank, tourie, chemical dephosphorization chemicals dosing plant and micro- aerator organic linking, formation is a kind of to realize that anaerobism removes carbon Autotrophic denitrification is added to add the system of chemical dephosphorization organic assembling treated sewage, compared with the conventional municipal sewage based on well foster sludge Treatment process, the present invention due to reduce 62.5% aeration quantity, can reduce 50% energy expenditure；Anaerobe and autotrophy Type microbial growth rate is slow, can reduce by more than 75% surplus sludge volume；Recyclable portion of energy (such as biogas)；It can solve to pass Technique of uniting carbon source deficiency, total nitrogen problem not up to standard.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment Attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only some embodiments of the present invention, for this For the those of ordinary skill in field, without creative efforts, other are can also be obtained according to these attached drawings Attached drawing.
Fig. 1 is low energy consumption autotrophic denitrification municipal sewage system schematic diagram provided in an embodiment of the present invention；
In figure：1- anaerobism decarburizing reactions device (i.e. UASB reactors)；2- desilts tank；3- self-supported denitrification reactors (i.e. CANON Reactor)；4- settling tanks；5- chemical dephosphorization agitator tanks；6- chemical dephosphorization settling tanks；7- touries；The micro- aerators of 8-；9-ization Learn dephosphorization chemicals dosing plant；The total water inlet of A- anaerobism decarburizing reaction devices；The tail gas overfall of B- self-supported denitrification reactors；C- chemistry Total water outlet of dephosphorization settling tank；D- excess sludge discharge pipes.
Specific embodiment
With reference to the particular content of the present invention, the technical solution in the embodiment of the present invention is clearly and completely retouched It states, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.Based on the present invention Embodiment, those of ordinary skill in the art's all other embodiments obtained without making creative work, Belong to protection scope of the present invention.The content not being described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field The well known prior art.
As shown in Figure 1, the embodiment of the present invention provides a kind of low energy consumption autotrophic denitrification municipal sewage system, it is a kind of energy Realize the processing system that anaerobism adds autotrophic denitrification to add chemical dephosphorization process integration treated sewage except carbon, which can solve existing biography The drawbacks such as high energy consumption, sludge yield are big existing for municipal wastewater treatment process of uniting, water outlet total nitrogen is exceeded, including：
Anaerobism decarburizing reaction device desilts tank, self-supported denitrification reactor, settling tank, chemical dephosphorization agitator tank, chemical dephosphorization and sinks Shallow lake tank, tourie, chemical dephosphorization chemicals dosing plant, micro- aerator and water-distributing device；Wherein,
The anaerobism decarburizing reaction device is equipped with total water inlet, and the water outlet of the anaerobism decarburizing reaction device, which is sequentially connected with, to be desilted Tank, self-supported denitrification reactor, settling tank, chemical dephosphorization agitator tank and chemical dephosphorization settling tank, the chemical dephosphorization settling tank are set There is total water outlet；
The tourie is connected with the biogas mouth at the top of the anaerobism decarburizing reaction device；
Micro- aerator and water-distributing device are each provided at the bottom in the self-supported denitrification reactor, the water-distributing device It is connected with the water inlet of the self-supported denitrification reactor；Both micro- aerator and water-distributing device position are adjacent, micro- aerator Aeration opening it is identical with the water distribution mouth quantity of water-distributing device；
The chemical dephosphorization chemicals dosing plant is connected with the chemical dephosphorization agitator tank；What the chemical dephosphorization chemicals dosing plant added in Dephosphorization reagent is aluminium polychloride or poly-ferric chloride；
Described to desilt equipped with mud scum device is scraped in tank, this desilts tank top and is equipped with mud discharging mouth equipped with mud mud discharging mouth, bottom is scraped； This desilts tank top equipped with mud scraper；
Tail gas overfall is equipped at the top of the self-supported denitrification reactor；
The precipitation pot bottom is equipped with mud discharging mouth, which returns through mud return line is connected to the autotrophic denitrification reaction Device；
The chemical dephosphorization precipitation pot bottom is equipped with mud discharging mouth.
Above-mentioned municipal sewage system further includes：Excess sludge discharge pipe, respectively with the mud discharging mouth for desilting tank, institute The mud discharging mouth for stating settling tank is connected with the mud discharging mouth of the chemical dephosphorization settling tank；Desilt tank top dress mud scraper；
The sludge reflux amount that the mud discharging mouth of the settling tank is back to the self-supported denitrification reactor through mud return line is： Flow back 0.4m per 12h3Sludge, reflux type are intermittent sludge reflux.
In above-mentioned municipal sewage system, the total water inlet of anaerobism decarburizing reaction device lower part, top sets water outlet, is Lower water inlet upper water-out structure.
In above-mentioned municipal sewage system, the bottom of tank is desilted as vertebral body structure, this desilts tank lower part and sets water inlet, Above the vertebral body structure of bottom, which sets water outlet for the water inlet.
In above-mentioned municipal sewage system, the lower part of self-supported denitrification reactor sets water inlet, and top sets water outlet, For lower water inlet upper water-out structure.
In above-mentioned municipal sewage system, the bottom of settling tank is vertebral body structure, and the top of the settling tank sets water inlet Mouthful, upper side sets water outlet.
In above-mentioned municipal sewage system, the lower part of chemical dephosphorization agitator tank sets water inlet, and top sets water outlet, Agitating device is equipped in the chemical dephosphorization agitator tank.
In above-mentioned municipal sewage system, the top of chemical dephosphorization settling tank sets water inlet, and upper side is set out The mouth of a river, the bottom of the chemical dephosphorization agitator tank is vertebral body structure.
The embodiment of the present invention also provides a kind of low energy consumption autotrophic denitrification municipal wastewater processing method, using above-mentioned low energy consumption Autotrophic denitrification municipal sewage system, comprises the following steps：
The anaerobism decarburizing reaction device of raw water into the processing system after physics coagulation carries out anaerobism except at carbon Reason removes the part COD in sewage, organic nitrogen is partially converted into ammonia nitrogen, organophosphor is converted into inorganic phosphate radical ion；
The biogas generated during the anaerobism decarburizing reaction device anaerobism carbon removal treatment is absorbed by tourie；In tourie If lye absorbs hydrogen sulfide；
The water outlet well water of the anaerobism decarburizing reaction device is desilted by floating and sinking to carrying out mud-water separation in tank, after separation Clear water gravity flow into self-supported denitrification reactor, arranged outside sludge；
It is formed in agitaion and micro- oxygen environment and carried out under the effect of micro- aerator in the self-supported denitrification reactor Reaction, 50~60% mineralized nitrogen are nitrite nitrogen, and Anammox reaction occurs with remaining ammonia nitrogen, generate nitrogen and a small amount of Nitrate nitrogen, nitrogen are discharged through tail gas overfall, and nitrate nitrogen occurs anti-nitration reaction with rest COD and completes denitrogenation and COD removals；
The water outlet of the self-supported denitrification reactor enters settling tank and carries out mud-water separation, and the settling tank takes off to the autotrophy Returned sludge in Analysis；
After the Dephosphorization reagent mixing that the water outlet of the settling tank and chemical dephosphorization chemicals dosing plant add in, stirred into chemical dephosphorization It mixes tank and carries out quick stirring and form rich phosphorus precipitation, precipitate the clear water isolated and enter chemical dephosphorization settling tank and precipitated, muddy water Water outlet after separation.
In above-mentioned processing method, the anaerobism in processing system is except carbon reactor is using water inlet, standing, three ranks of intaking again The Starting mode of section starts；
The tank that desilts scrapes mud, lower part spoil disposal, the mud-water separation mode of middle and upper part water outlet using top；
The self-supported denitrification reactor is started using first anaerobism, rear micro- two stage Starting mode of oxygen；
By the way that DO values is strictly controlled to make realization partial nitrification inside the self-supported denitrification reactor for 0.2~0.4mg/L The reactive mode of the reaction coupling of Anammox denitrification three；
Settling tank returned sludge into the self-supported denitrification reactor uses to flow back by intermittent, interval return time For 6 it is small when or 12 it is small when.
The embodiment of the present invention is specifically described in further detail below.
As shown in Figure 1, the flow of the low energy consumption autotrophic denitrification municipal sewage system processing municipal wastewater of the present embodiment It is as follows：Enter anaerobism decarburizing reaction device (then be known as UASB reactors) by the raw water of physics coagulation, carry out anaerobism and remove carbon； Organic pollution is cleared up in anaerobic reactor, is removed most COD, and is generated biogas；Most of organic nitrogen is converted into ammonia nitrogen, Organophosphor is converted into inorganic phosphate radical ion；Biogas by lye absorb hydrogen sulfide after, torch can be lighted on the spot, also collect into One step utilizes；The water outlet of removal most COD can avoid producing bigger effect follow-up autotrophic denitrification；In UASB reactor water outlets A small amount of sludge is carried, completes mud-water separation by floating and sinking effect in tank is desilted, clear water enters self-supported denitrification reactor (being known as CANON reactors afterwards)；In micro- oxygen environment of CANON reactors, 50~60% mineralized nitrogen is nitrite nitrogen, and with Anammox reaction occurs for remaining ammonia nitrogen, generates nitrogen and a small amount of nitrate nitrogen, nitrogen are discharged through exhaust outlet, nitrate nitrogen and rest COD Denitrogenation and COD removal process are further completed in generation denitrification；Water inlet and micro- aeration are collectively formed to sludge in reactor Agitaion, be sufficiently mixed muddy water, avoid short stream, mud-water separation is completed in water outlet in subsequent settling tank and sludge returns Stream；The Dephosphorization reagent that water outlet is added with chemical dephosphorization chemicals dosing plant is mixed into chemical dephosphorization agitator tank and quickly stirs, and is formed rich Phosphorus precipitates, and mud-water separation is completed in subsequent chemical dephosphorization settling tank, forms final outflow water, and all excess sludges and precipitation collect Middle outward transport.
With flow of inlet water 1m3Exemplified by/h, each equipment size such as following table in above-mentioned processing system：
In upper table：1. tourie uses hydrogen sulfide absorption tank, the specific polyethylene drum for using 50 liters of volume；
2. the aeration opening for the aerator that CANON reactor bottoms are set is adjacent with the water distribution mouth position of cloth apparatus, quantity It is identical；
3. above-mentioned processing system is equipped with power set and operating index (DO, temperature, pH etc.) detection device.
The specific implementation flow that above-mentioned processing system carries out sewage disposal is as follows：
(1) start anaerobism and remove carbon reactor (i.e. UASB reactors)：
Using common sewage disposal plant excess sludge as seed sludge, inoculum density 5000mg/L, initial flow of inlet water is 0.8m3/h；After water inlet 15 days, stop water inlet, 12 days are stood, again with 0.8m3/ h flows are intake, and water outlet begins with muddiness, and holds 15 days or so continuous, all muddiness water outlets exhaust；Dregs are reduced in water outlet afterwards, and are gradually clarified, and after water outlet status is stablized, are carried High flow of inlet water is to 0.9m3/ h, after stablizing again, flow of inlet water is promoted to predetermined amount of flow 1.0m3/ h stablizes 10 days, has started Into；It is 60~90 days to start the time；
Contain toxic gas hydrogen sulfide in the biogas of generation, the sodium hydroxide solution of 0.1mol/L is configured, as tourie Interior hydrogen sulfide absorption liquid monitors hydrogen sulfide absorption liquid pH, when pH value is down to 8.0, reconfigures hydrogen sulfide absorption liquid, waste liquid Specially treated is done in taking-up, and remaining biogas lights torch.
The a small amount of suspended matter contained in the water outlet of UASB reactors is realized and suspended by desilting the floating of tank and sinking effect The separation of object and water discharges sinking sludge, scrapes mud scum machine (scraping mud scum device) and scrape floating sludge, it is ensured that be not required one daily In line mud.
The start-up course of the UASB reactors need not add other medicaments, will not since municipal wastewater COD concentration is relatively low There is sludge acidification phenomenon；Carbocyclic ring section is removed by anaerobism, COD concentration is down to 100~130mg/L from 300~500mg/L in water, Ammonia nitrogen concentration rises to 40~50mg/L from 35~45mg/L, and total nitrogen concentration is basically unchanged, and total phosphorus concentration rises to 4 from 3~8mg/L~ 10mg/L, pH value are down to 7.3~7.4 from 7.6 or so.
(2) self-supported denitrification reactor (i.e. CANON reactors) is started：
The seed sludge of CANON reactors starts bag using the anaerobic ammonium oxidation sludge and nitrosation sludge cultivated in advance Include two stages of anaerobism and micro- oxygen；Wherein,
The anaerobic stages of startup are first inoculated with the anaerobic ammonium oxidation sludge of 3000mg/L, and 50mg/L nitrous is added in water inlet The sodium nitrite of nitrogen equivalent and the saleratus of 300mg/L are as inorganic carbon source and pH adjusting agent, and pH value is about in water at this time 7.6~7.9；With 0.5m3The flow water inlet of/h, continues 30 days, seed sludge is made to shake down, whenever ammonia nitrogen removal frank reaches When 80%, flow of inlet water is improved into 0.1m3/ L, until rising to 1.0m3/ h, and stable operation 15 days；
Being intake due to settling tank to CANON reactors returned sludge to CANON reactors has diluting effect, to keep as far as possible Influent ammonium concentration, using intermittent sludge reflux, flow back 0.4m per 12h3Sludge；
Anaerobic stages after a period of stabilisation, are transferred to micro- oxygen stage, stop addition sodium nitrite and saleratus, input 2000mg/L is directly adjusted to 1.0m by broken nitrosation sludge, flow of inlet water3/ h carries out micro- aeration, dissolved oxygen concentration profit 0.3mg/L or so is strict controlled in DO control systems, DO value bounds are respectively 0.2,0.4mg/L.Utilize two in aeration Carbonoxide rises to pH value automatically as inorganic carbon source, and using the biological oxidation of a small amount of hydrogen sulfide dissolved in water inlet More than 7.5, to provide anaerobic ammonia oxidizing bacteria suitable living environment；In micro- oxygen stage, the broken gradual adhesion of nitrosation sludge On original anaerobic ammonium oxidation sludge surface, make to form anaerobism microenvironment inside sludge, ammonia nitrogen partly turns near Sludge Surface Nitrite nitrogen is turned to, and nitrogen and a small amount of nitrate nitrogen are converted by internal anaerobic ammonia oxidizing bacteria with remaining ammonia nitrogen, nitrate nitrogen removes carbon with anaerobism Remaining COD carries out denitrification in micro- oxygen environment, ultimately forms partial nitrification Anammox denitrification coupling effect It should；The stage, flowed back 0.3m per 6h equally using intermittent sludge reflux3Sludge；
Through adaptability culture after a while, the startup of CANON reactors is completed in stable operation after 30 days, and the CANON is anti- Device is answered, which to start, needs 90~120 days.Due to being mainly autotrophic type microorganism in reactor, growing multiplication rate is slower, and early period opens The dynamic stage, after stable operation, every month discharged a small amount of sludge (100- according to specific sludge concentration and treatment effect without spoil disposal 300L)；
Sewage is handled by autotrophic denitrification link, and COD concentration is down to below 50mg/L, ammonia nitrogen from 100~130mg/L in water Concentration is down to 1~3mg/L from 40~50mg/L, and total nitrogen is down to 10mg/L or so, and total phosphorus concentration maintains 4~10mg/L, pH substantially Value rises to 7.5~7.8 from 7.3~7.4.
(3) chemical dephosphorization：
Chemical dephosphorization is carried out as Dephosphorization reagent using the polymeric ferrous sulphate solution of mass fraction 10%, with 15~20mg/L Sulfuric acid concentration of iron be added in chemical dephosphorization agitator tank, in agitating device with 200s-1Stirring intensity (G) stirred It mixes, Dephosphorization reagent is uniformly mixed with water and enters chemical dephosphorization settling tank after generating flco, is stopped in chemical dephosphorization settling tank After settling 1h, supernatant becomes final outflow water, and sediment enters the discharge of total surplus sludge discharge pipe.Total phosphorus is down to by the stage Below 0.3mg/L.
The anaerobism of processing system of the present invention is each except the Inlet and outlet water of carbon+autotrophic denitrification+chemical dephosphorization group technology treated sewage Item index such as following table.
Project COD NH4+-N TN TP pH
Water inlet mg/L 300~500 35~45 45~55 3~8 7.3~7.6
Water outlet mg/L 50 1~3 10 0.3 7.0~7.8
In the processing system and method for the advantageous effect that technical solution of the present invention is brought, based on well foster sludge Conventional municipal sewage treatment process, the technical solution due to reduce 62.5% aeration quantity, can reduce 50% energy expenditure； Anaerobe and autotrophic type microbial growth rate are slow, can reduce by more than 75% surplus sludge volume；Recyclable portion of energy (biogas)；It can solve traditional handicraft carbon source deficiency, total nitrogen problem not up to standard.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art is in the technical scope of present disclosure, the change or replacement that can readily occur in, It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims Subject to enclosing.

Claims (10)

1. a kind of low energy consumption autotrophic denitrification municipal sewage system, which is characterized in that including：
Anaerobism decarburizing reaction device desilts tank, self-supported denitrification reactor, settling tank, chemical dephosphorization agitator tank, chemical dephosphorization precipitation Tank, tourie, chemical dephosphorization chemicals dosing plant, micro- aerator and water-distributing device；Wherein,
The anaerobism decarburizing reaction device be equipped with total water inlet, the water outlet of the anaerobism decarburizing reaction device be sequentially connected with desilt tank, from Denitrification reactor, settling tank, chemical dephosphorization agitator tank and chemical dephosphorization settling tank are supported, the chemical dephosphorization settling tank is equipped with always to go out The mouth of a river；
The tourie is connected with the biogas mouth at the top of the anaerobism decarburizing reaction device；
Micro- aerator and water-distributing device are each provided at the bottom in the self-supported denitrification reactor, the water-distributing device and institute State the water inlet connection of self-supported denitrification reactor；
The chemical dephosphorization chemicals dosing plant is connected with the chemical dephosphorization agitator tank；
Described to desilt equipped with mud scum device is scraped in tank, this desilts tank top and is equipped with mud discharging mouth equipped with mud mud discharging mouth, bottom is scraped；
Tail gas overfall is equipped at the top of the self-supported denitrification reactor；
The precipitation pot bottom is equipped with mud discharging mouth, which returns through mud return line and be connected to the self-supported denitrification reactor；
The chemical dephosphorization precipitation pot bottom is equipped with mud discharging mouth.
2. low energy consumption autotrophic denitrification municipal sewage system according to claim 1, which is characterized in that further include：It is surplus Remaining sludge discharge pipe, respectively with the mud discharging mouth for desilting tank, the mud discharging mouth of the settling tank and the chemical dephosphorization settling tank Mud discharging mouth connection；
The sludge reflux amount that the mud discharging mouth of the settling tank is back to the self-supported denitrification reactor through mud return line is：Often 12h reflux 0.4m3Sludge, reflux type are intermittent sludge reflux.
3. low energy consumption autotrophic denitrification municipal sewage system according to claim 1 or 2, which is characterized in that described to detest The total water inlet of oxygen decarburizing reaction device lower part, top set water outlet, for lower water inlet upper water-out structure.
4. low energy consumption autotrophic denitrification municipal sewage system according to claim 1 or 2, which is characterized in that described to remove The bottom of mud tank is vertebral body structure, this desilts tank lower part and sets water inlet, which, should above the vertebral body structure of bottom The middle and upper part for desilting tank sets water outlet.
5. low energy consumption autotrophic denitrification municipal sewage system according to claim 1 or 2, which is characterized in that it is described from The lower part for supporting denitrification reactor sets water inlet, and top sets water outlet, for lower water inlet upper water-out structure.
6. low energy consumption autotrophic denitrification municipal sewage system according to claim 1 or 2, which is characterized in that described heavy The bottom of shallow lake tank is vertebral body structure, and the top of the settling tank sets water inlet, and upper side sets water outlet.
7. low energy consumption autotrophic denitrification municipal sewage system according to claim 1 or 2, which is characterized in that describedization The lower part for learning dephosphorization agitator tank sets water inlet, and top sets water outlet, agitating device is equipped in the chemical dephosphorization agitator tank.
8. low energy consumption autotrophic denitrification municipal sewage system according to claim 1 or 2, which is characterized in that describedization The top for learning dephosphorization settling tank sets water inlet, and upper side sets water outlet, and the bottom of the chemical dephosphorization agitator tank is centrum Structure.
9. a kind of low energy consumption autotrophic denitrification municipal wastewater processing method, which is characterized in that using any one of claim 1 to 8 institute The low energy consumption autotrophic denitrification municipal sewage system stated, comprises the following steps：
The anaerobism decarburizing reaction device of raw water into the processing system after physics coagulation carries out anaerobism carbon removal treatment, goes Except the part COD in sewage, organic nitrogen is partially converted into ammonia nitrogen, organophosphor is converted into inorganic phosphate radical ion；
The biogas generated during the anaerobism decarburizing reaction device anaerobism carbon removal treatment is absorbed by tourie；
The water outlet well water of the anaerobism decarburizing reaction device is desilted by floating and sinking to carrying out mud-water separation in tank, clear after separation Water gravity flow is arranged outside into self-supported denitrification reactor, sludge；
It is formed in agitaion and micro- oxygen environment and is reacted under the effect of micro- aerator in the self-supported denitrification reactor, 50~60% mineralized nitrogen is nitrite nitrogen, and Anammox reaction occurs with remaining ammonia nitrogen, generates nitrogen and a small amount of nitrate nitrogen, Nitrogen is discharged through tail gas overfall, and nitrate nitrogen occurs anti-nitration reaction with rest COD and completes denitrogenation and COD removals；
The water outlet of the self-supported denitrification reactor enters settling tank and carries out mud-water separation, and the settling tank is anti-to the autotrophic denitrification Answer returned sludge in device；
After the Dephosphorization reagent mixing that the water outlet of the settling tank and chemical dephosphorization chemicals dosing plant add in, into chemical dephosphorization agitator tank It carries out quick stirring and forms rich phosphorus precipitation, precipitate the clear water isolated and enter chemical dephosphorization settling tank and precipitated, mud-water separation Water outlet afterwards.
10. low energy consumption autotrophic denitrification municipal wastewater processing method according to claim 9, which is characterized in that the method In, the anaerobism in processing system is except carbon reactor is using water inlet, standing, triphasic Starting mode startup of intaking again；
The tank that desilts scrapes mud, lower part spoil disposal, the mud-water separation mode of middle and upper part water outlet using top；
The self-supported denitrification reactor is started using first anaerobism, rear micro- two stage Starting mode of oxygen；
By the way that DO values is strictly controlled to make formation partial nitrification anaerobism ammonia in the self-supported denitrification reactor for 0.2~0.4mg/L Aoxidize the reactive mode of the reaction coupling of denitrification three；
Into the self-supported denitrification reactor, for returned sludge using flowing back by intermittent, interval return time is 6 to the settling tank Hour or 12 it is small when.
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CN109502748A (en) * 2018-11-20 2019-03-22 江苏科技大学 Based on nitrosation-anaerobic ammoxidation-induction crystallization phosphorus recycling sewage disposal system and method
CN110156157A (en) * 2019-05-08 2019-08-23 哈尔滨工业大学（威海） It is a kind of for carbon source in sewage and phosphorus recycling and autotrophic denitrification process
CN110885160A (en) * 2018-09-07 2020-03-17 斗山重工业建设有限公司 Water treatment apparatus and method for removing nitrogen contained in water to be treated
CN115571982A (en) * 2022-10-08 2023-01-06 中国电建集团华东勘测设计研究院有限公司 Biological denitrification method of bacteria-algae symbiotic system based on pH and DO control
CN115611428A (en) * 2022-11-04 2023-01-17 山东生态家园环保股份有限公司 Anaerobic ammonia oxidation denitrification device suitable for breeding sewage

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CN106242162A (en) * 2016-08-18 2016-12-21 南方创业（天津）科技发展有限公司 The dirt of livestock and poultry farms in scale excrement and the recycling treatment process of waste water

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CN106242162A (en) * 2016-08-18 2016-12-21 南方创业（天津）科技发展有限公司 The dirt of livestock and poultry farms in scale excrement and the recycling treatment process of waste water

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110885160A (en) * 2018-09-07 2020-03-17 斗山重工业建设有限公司 Water treatment apparatus and method for removing nitrogen contained in water to be treated
CN110885160B (en) * 2018-09-07 2022-04-19 斗山重工业建设有限公司 Water treatment apparatus and method for removing nitrogen contained in water to be treated
CN109502748A (en) * 2018-11-20 2019-03-22 江苏科技大学 Based on nitrosation-anaerobic ammoxidation-induction crystallization phosphorus recycling sewage disposal system and method
CN110156157A (en) * 2019-05-08 2019-08-23 哈尔滨工业大学（威海） It is a kind of for carbon source in sewage and phosphorus recycling and autotrophic denitrification process
CN115571982A (en) * 2022-10-08 2023-01-06 中国电建集团华东勘测设计研究院有限公司 Biological denitrification method of bacteria-algae symbiotic system based on pH and DO control
CN115611428A (en) * 2022-11-04 2023-01-17 山东生态家园环保股份有限公司 Anaerobic ammonia oxidation denitrification device suitable for breeding sewage

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