CN103641272A - High-concentration organic wasted water and refuse leachate zero discharge treatment system - Google Patents

High-concentration organic wasted water and refuse leachate zero discharge treatment system Download PDF

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CN103641272A
CN103641272A CN201310628869.6A CN201310628869A CN103641272A CN 103641272 A CN103641272 A CN 103641272A CN 201310628869 A CN201310628869 A CN 201310628869A CN 103641272 A CN103641272 A CN 103641272A
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pipeline
nanofiltration
pump
ultrafiltration
denitrification
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CN103641272B (en
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李启龙
孔慧
吴文培
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SHANGHAI KANGSHENG ENVIRONMENTAL PROTECTION ENERGY TECH CO LTD
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SHANGHAI KANGSHENG ENVIRONMENTAL PROTECTION ENERGY TECH CO LTD
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Abstract

The invention discloses a high-concentration organic wasted water and refuse leachate zero discharge treatment system, and belongs to the field of sewage treatment. The main structure of the high-concentration organic wasted water and refuse leachate zero discharge treatment system comprises a pretreatment system, an anaerobic system, a nitration and denitrification system, a tube-type ultrafiltration MBR (Meane Biological Reactor) system, a nanofiltration system, a gas-liquid contact type evaporation system, and the like, wherein the pretreatment system is connected with the anaerobic system through a pipeline; an anaerobic circulation pool inside the anaerobic system and a denitrification pool inside the nitration and denitrification system are parallelly fixed and connected; the nitration and denitrification system is connected with the tube-type ultrafiltration MBR system through the pipeline; the tube-type ultrafiltration MBR system is connected with the nanofiltration system through the pipeline; the nanofiltration system is connected with the gas-liquid contact type evaporation system through the pipeline; the tube-type ultrafiltration MBR system is connected with a residual sludge treatment system through the pipeline. The high-concentration organic wasted water and refuse leachate zero discharge treatment system disclosed by the invention is simple in treatment process, greatly increases volume loading, is easy to install and debug, shortened in treatment time and low in energy consumption; the treated second pollutent achieves a three-stage standard, so that the zero discharge of the pollutant is realized.

Description

High concentrated organic wastewater and percolate zero-discharge treatment system
Technical field
The present invention relates to a kind for the treatment of system for waste water, rubbish, belong to environmental protection industry (epi) sewage treatment area, be specifically related to a kind of high concentrated organic wastewater and percolate zero-discharge treatment system.
Technical background
Over nearly 10 years, China's industrialization and urbanization process are accelerated.Municipal wastes total amount is with annual more than 10% speed increment, and within 2010, China's domestic waste reaches more than 200,000,000 ton.Percolate is a kind of high density, polycomponent, the labile sewage producing in garbage processing procedure, and 1 ton of percolate is approximately equivalent to the concentration of 300 tons of contained pollutents of municipal effluent.
Percolated liquid in city refuse landfill complicated component, be one of universally acknowledged the most unmanageable high concentrated organic wastewater, main manifestations is that BOD5, CODcr concentration content high, ammonia nitrogen is higher, water quality and quantity mobility scale is quite large, microbial nutrition element ratio imbalance etc.Percolate is the secondary pollution source in landfill process, if do not add processing, directly enters environment, can cause serious environmental pollution.In recent years, percolate has caused severe contamination to the underground water in rubbish place, soil and surface water.The control of percolate from garbage filling field and processing are the key factors that guarantees long-term, the safe disposal of solid waste.
At present, it is that China's landfill yard is built and managed compared with one of weak link that Landfill Leachate is processed, country has formulated again percolate new standard GB16889-2008, percolate site disposal qualified discharge, require more complicated treatment process, higher level of management and higher cost.But the percolate treating process that so far, is applicable to China's national situation, meets " efficient, low consumption " cleanup standard is still in development.Therefore the reasonableness of, inquiring into garbage leachate treatment process to modernization, standardized garbage sanitary filling field and economy, high-efficiency refuse percolate process engineering construction, implement significant.
In recent years, along with the development of new separation technology, membrane separation technique obtains Preliminary Applications in percolate is processed, convenient operation and management, second pond is not set, and water outlet can reach reuse standard, has realized gas-liquid contact type vapo(u)rization system or the technique polluted and has been worth promoting.But although the existing organic membrane cost being applied to is low and filling area is high, in use procedure, be easy to occur withstand voltage, scale resistance is all bad, and vulnerable to pollution, regenerates more difficult, the life-span of film is generally shorter, effluent quality is unstable etc.
Summary of the invention
In order to solve deficiency of the prior art, the invention provides a kind of high concentrated organic wastewater and percolate zero-discharge treatment system, treatment process is simple, volumetric loading strengthens, installs, debugs simple greatly, treatment time shortens, and has reduced energy consumption, has reduced occupation of land, and two pollutants after processing reach grade III Standard, realize the zero-emission of pollution substance, can not cause secondary pollution to environment.
The present invention is achieved by the following technical solutions:
High concentrated organic wastewater and percolate zero-discharge treatment system, its primary structure is by preprocessing system, anaerobic system, nitration denitrification system, tubular type ultrafiltration MBR system, nanofiltration system, gas-liquid contact type vapo(u)rization system, excess sludge treatment system, accident pool forms, wherein preprocessing system is connected by pipeline with anaerobic system, anaerobism circulatory pool in anaerobic system is fixed side by side and is connected with the denitrification pond in nitration denitrification system, nitration denitrification system is connected by pipeline with tubular type ultrafiltration MBR system, tubular type ultrafiltration MBR system is connected by pipeline with nanofiltration system, nanofiltration system is connected by pipeline with gas-liquid contact type vapo(u)rization system, tubular type ultrafiltration MBR system is connected by pipeline with excess sludge treatment system, accident pool is connected with the basket filter in preprocessing system by waste pipe.
Described preprocessing system, its structure comprises: basket filter, settling pit, equalizing tank, wherein basket filter is connected by pipeline with settling pit, settling pit is fixed side by side and is connected with equalizing tank, basket filter, can elimination large granular impurity, settling pit, further precipitated impurities, the equalizing tank regulating water quality water yield and acidification hydrolization.
Described system for anaerobic treatment, its structure consists of: anaerobism intake pump, EUASB anaerobic reactor, anaerobism circulatory pool, anaerobism recycle pump, wherein anaerobism intake pump is connected by pipeline with EUASB anaerobic reactor, EUASB anaerobic reactor is fixed side by side and is connected with anaerobism circulatory pool, anaerobism circulatory pool is connected by pipeline with anaerobism recycle pump, EUASB anaerobic reactor is removed and to be oozed most of organism in drop liquid, and anaerobism circulatory pool can mixing anaerobic pond clear liquid and regulated follow-up water inlet.
Described nitration denitrification system, its structure is by denitrification pond, nitrification tank, stirrer, aeration recycle pump, roots blower, jet aerator forms, wherein stirrer is fixedly installed in denitrification pond, denitrification pond is fixed side by side and is connected with nitrification tank, nitrification tank is connected by pipeline with aeration recycle pump, aeration recycle pump is connected by pipeline with jet aerator, jet aerator is fixedly installed in nitrification tank, roots blower is connected by pipeline with jet aerator, utilize the denitrification in denitrification pond to remove nitric nitrogen, and then utilize nitrification tank nitrification by mineralized nitrogen for nitric nitrogen and significantly remove organism, ultrafiltration MBR system, plays the effect of Separation of Water and mud on the one hand, on the other hand, plays the function of reservation and enhancement microbiological system.
Described tubular type ultrafiltration MBR system, its structure consists of: ultrafiltration intake pump, ultrafiltration MBR film group, ultrafiltration recycle pump, ultrafiltration scavenging pump, cleaning barrels, wherein ultrafiltration intake pump is connected by pipeline with ultrafiltration recycle pump, ultrafiltration recycle pump is connected by pipeline with ultrafiltration MBR film group, ultrafiltration scavenging pump is connected by pipeline with ultrafiltration recycle pump, cleaning barrels is connected by pipeline with ultrafiltration scavenging pump, and ultrafiltration membrane system adopts the 8 cun of external PVDF ultrafiltration of 3m MBR film groups.
Described nanofiltration system, its structure consists of: the former bucket of nanofiltration, nanofiltration intake pump, nanofiltration high-pressure pump, nanofiltration membrane group, cleaning barrels, nanofiltration scavenging pump, nanofiltration dope storage tank, wherein the former bucket of nanofiltration is connected by pipeline with nanofiltration intake pump, nanofiltration intake pump is connected by pipeline with nanofiltration high-pressure pump, cleaning barrels is connected by pipeline with nanofiltration scavenging pump, nanofiltration scavenging pump is connected by pipeline with nanofiltration high-pressure pump, nanofiltration high-pressure pump is connected by pipeline with nanofiltration membrane group, and nanofiltration membrane group is connected by pipeline with nanofiltration dope storage tank.Nanofiltration membrane treatment system plays the effect of the impurity that dams by nanofiltration membrane component.
Described gas-liquid contact type vapo(u)rization system, its structure consists of: vapo(u)rization system intake pump, gas-liquid contact type evaporation unit, wherein nanofiltration dope storage tank is connected by pipeline with vapo(u)rization system intake pump, vapo(u)rization system intake pump is connected by pipeline with gas-liquid contact type evaporation unit, thereby gas-liquid contact type vapo(u)rization system realizes by low-temperature evaporation the object that solid-liquid separation reaches pollution substance zero release.
Described excess sludge treatment system, its structure consists of: sludge thickener, dewatering centrifuge, medicine-adding bin, dosing pump, sludge pump, wherein sludge thickener is connected by pipeline with sludge pump, sludge pump is connected by pipeline with dewatering centrifuge, medicine-adding bin is connected by pipeline with dosing pump, and dosing pump is connected by pipeline with dewatering centrifuge.
The workflow of high concentrated organic wastewater of the present invention and percolate zero-discharge treatment system is as follows:
Oozing drop liquid and after basket filter elimination macrobead thing impurity, enter settling pit and further precipitate, enter afterwards the equalizing tank regulating water quality water yield pre-acidification hydrolization, is that subsequent disposal operation reduces pollutant load;
Sewage in equalizing tank is in anaerobism intake pump is promoted to EUASB anaerobic reactor, in EUASB anaerobic reactor by the organic substance in the metabolism Decomposition Wastewater of anaerobion, make deliquescent organic substance through a series of biological process, most of organism in drop liquid is oozed in removal, reduce COD, oozing majority of organic pollutants in drop liquid removes, in this stage, COD obtains reduction to a certain extent, the mode that anaerobism circulation adopts reaction zone circulation and effluent recycling to combine, for avoiding causing secondary pollution, the biogas producing is collected and sends into power plant's garbage warehouse,
Anaerobism circulatory pool water outlet gravity flow enters anoxic/aerobic membrane bioreactor, reactor is taked the form of Prepositive denitrification, in nitration denitrification system, due to stirrer in denitrification pond, after stirring action, make the water outlet of anaerobism circulatory pool fully mix with nitrated section of phegma, under low dissolved axygen state, through denitrification, remove nitric nitrogen, then enter nitrification tank; In nitrification tank, the jet-flow aeration of jet aerator makes mixed solution in pond be high-solubility oxygen state, and through sufficient nitration reaction, in water, mineralized nitrogen is nitric nitrogen, and the substrate concentration of organic contamination simultaneously significantly reduces; The mixed solution of nitrification tank enters external pipe type ultrafiltration MBR system, in system, establish large flow ultrafiltration recycle pump, by large flow, circulate in film surface and form high velocity turbulent flow, pollutent is difficult in film surface attachment, by recycle pump, form transmembrane pressure simultaneously, water component in muddy water mixed solution sees through film and forms through liquid discharge, see through liquid or qualified discharge or enter next processing unit and continue to process, mixed solution after concentrated is still back to denitrification pond and digester increases sludge concentration, and excess sludge drains into sludge thickener;
Ultrafiltration is produced water and is entered nanofiltration membrane system through nanofiltration intake pump and the pressurization of nanofiltration high-pressure pump, utilizes the crown_interception of nanofiltration membrane component to solute, and every contamination index is reduced, and nanofiltration dope processes by gas-liquid contact type vapo(u)rization system the zero release that realizes pollution substance;
The excess sludge that biochemical system produces enters sludge thickener and carries out concentration, and the residue that the mud after concentrating and gas-liquid contact type vapo(u)rization system produce is promoted to dewatering centrifuge centrifuge dehydration by sludge pump, and the backflow of desliming clear liquid enters biochemical system and continues to process; Because contained organism in mud is effective bioenergy, dry mud can produce the heat of 16.65-20.93MJ/t, for a kind of low calorie fuels, mud water ratio after concentration is 80% left and right, become mud cake shape, be about 0.6t every day, dehydrated sludge can not cause secondary pollution to environment in course of conveying, can be transported to incinerator and domestic garbage mixing burning disposal.
Owing to having adopted above technical scheme, the present invention compares with traditional product, has following advantage and advantage:
1) realize HRT separated with SRT: the follow-up tubular type MBR film biochemical reactor that arranges of anaerobic and aerobic, this process using the biochemical mode combining with ultra-filtration membrane, ultra-filtration membrane has replaced traditional second pond, realized the complete separated of the water in active sludge and microbial cells, both realized the complete separated of the water conservancy residence time (HRT) and sludge retention time (SRT), consequent highly active aerobic microbiological group has high degradation efficiency to the high loading organic pollutant oozing in drop liquid.
2) retain and domestication biological flora easy: microorganism species is trapped in is completely conducive to retain longer microorganism of generation cycle in membrane bioreactor, domestication produces microorganism species hardly degraded organic substance to stronger degradation capability, to oozing the organism of bio-refractory in drop liquid, also can effectively degrade, guaranteed good effluent quality, and water conditioning.
3) biological denitrificaion efficiency is high: the combined action by nitrobacteria and denitrifying bacterium makes the nitrogen-containing pollutant in sewage be converted into the process of nitrogen.Aerobic/anaerobic-MBR film biochemical reactor process using biological denitrificaion mode is that nitrification and denitrification is effectively removed and degrades ammonia nitrogen and total nitrogen, and ammonia nitrogen removal effect can reach 99%, and total nitrogen is reached to 75-90%; Biological denitrification process efficiency than traditional employing nitrification and denitrification only reaches 80-90%, and total nitrogen only reaches 50-60%.And a large amount of engineering practices proves its great superiority.
4) enriched microorganism: enrichment raw type flora-nitrite bacteria promote its growth and MBR membrane bioreactor is exactly the damming of mechanical membrane of use soon targetedly, can effectively retain nitrite bacteria small and Fast Growth.Not only improve surperficial upper raising activated sludge concentration, the more important thing is the microorganism most in enrichment active sludge with active and vitality; Built and be conducive to breed microorganism slowly, as the environment of nitrous acid and nitrobacteria growth, can improve the nitrification ability of system, be conducive to improve the processing efficiency of difficult degradation larger molecular organics and impel it to decompose thoroughly simultaneously; Retain and enhancement microbiological---as microorganism device, retain high efficiency engineering microorganism, can greatly reduce the catagen speed of high-efficiency strain.
5) EUASB efficiency is high and adjustable: the sludge quantity of high density in reactor, adopt the systemic circulation mode before triphase separator, and can avoid sludge loss in reactor.In the circular flow mode before triphase separator, the inoculation ability certainly that is conducive to reactor, shorten start time, be conducive to guarantee high concentration sludge amount and the activity in reactor, can not affect because of the variation of flow velocity in reactor the separation function of triphase separator.Particularly for the processing of the higher organic waste water of concentration ratio, should consider that internal recycle is to improve upflow velocity in reactor.From top, pond water distribution: very easily fouling of anaerobism pipeline long-time running, so water distributor adopts the mode of branch water distribution from Chi Ding, water distributor has sleeve pipe outward, maintains easily replacing.
6) jet-flow aeration high-level efficiency: the mud mixture in aeration tank, under relatively low pressure, is sent in the inner nozzle of jet aerator by circulating water main by water circulating pump, forms one liquid stream at a high speed, and air is admitted in outer nozzle simultaneously.Liquid stream at a high speed, by air cutting, is atomized into the bubble that diameter is extremely small, forms turbulent flow, gas-liquid mixed stream chopped.Transfer to quickly and effectively liquid phase and biophase, complete the fast transfer process of oxygen.Dissolved oxygen efficiency can reach 28.0 ~ 32.0%.
7) efficient low working cost denitrification A pond: denitrification removes oxynitride and organic carbon, loads by controlling the COD of anaerobic pond, guarantees to enter in the waste water of anoxic pond to contain enough carbon sources for denitrification utilization.Without additional carbon, reclaim the basicity that denitrification produces, reduce the working cost of engineering.HRT:43-60h;?MLSS:15~20g/L。
8) efficient denitrification decarburization O pond: adopt underload decarburization, nitrated Aerobic Pond, remove most ammonia-nitrogen by nitrification, remove most organic pollutant in water body by aerobic microbiological.HRT:170h;?MLSS:15~20g/L。
9) less energy-consumption ultrafiltration type MBR: solid-liquid separation and reservation flora.Nitrification liquid reflux ratio: 600% ~ 1200%; Return sludge ratio: 80% ~ 100%; Membrane flux: 70-80L/m2h(flat sheet membrane 20-20 L/m2h).
10) sludge concentration is high: sludge concentration height is one of advantage of MBR maximum, and Traditional Method is subject to the impact of sedimentation cannot too high (<5g).Tubular fibre immersion is subject to fracture of wire and dirty stifled problem can not too high (<8g).And tubular type MBR can be normally 15g up to MBR, can arrive 25g, even 40g.
11) solve sludge settling and expansion issues: the problem that conventional process is had a headache is most the problem of sedimentation and expansion.The biochemical muddy water mixed solution of tubular type MBR directly enters 8mm film pipe, and clear water is separated with mud, need not precipitate.
12) overcome easily stifled, disconnected problem of film silk: the problem that immersion MBR has a headache is most the problem of fracture of wire, and tubular membrane has very solid supporting layer, substantially can not break.Dirty blocking up is the common problem of embrane method sewage disposal.And tubular membrane passage large (8mm is even larger), surface velocity high (4m/s), pollutes littlely, and dirty stifled probability is little.And PVDF reinforcing line counterdie and the high flow rate of extraordinary form, greatly overcome fracture of wire, dirty stifled and flux decline problem.
13) problem of cleaning and flux recovery: embrane method sewage disposal, cleaning is inevitably, cleans trouble, complexity, cleaning performance is bad, the rear flux recovery of cleaning is not good is the problem of having a headache most.Tubular type MBR film only need be shut down clear water and be rinsed (2-5 minute), regular matting (1-6 month is once), and on-line operation is easy, and cleaning recovery effects is good.Tubular membrane is due to rete very thin (about 30um), so resistance is little, operating flux 65-140LMH.In sewage disposal, be high high-throughput, and flux easily recover to reach to 100%.
14) mud water ratio after concentration is 80% left and right, becomes mud cake shape, is about 0.6t every day.Dehydrated sludge can not cause secondary pollution to environment in course of conveying, can be transported to incinerator and domestic garbage mixing burning disposal.
15) gas-liquid contact type vapo(u)rization system is processed the zero release that realizes pollution substance, the sheet flow that liquid runs down tilts, and because cavatition flat board below produces small negative pressure, there is tang in dull and stereotyped upper surface; Negative pressure makes air enter flowing fluid from dull and stereotyped below, after long bubble and liquid Long contact time, becomes saturated steam, exchanges solute or heat in other liquid; Fan with low voltage is carried air and is strengthened the contact of gas-liquid, improves reaction efficiency.Whole process can be used useless dust and useless remaining steam to provide gas-liquid contact type vapo(u)rization system power loss as energy.
16) volumetric loading greatly strengthens, installs, debugs simply, and the treatment time shortens, and has reduced energy consumption, has reduced occupation of land, and two pollutants after processing reach firsts and seconds relevant national standard.
Accompanying drawing explanation
Fig. 1, be structural representation of the present invention.
Fig. 2, be workflow diagram of the present invention.
In Fig. 1: 1-preprocessing system, 2-anaerobic system, 3-nitration denitrification system, 4-tubular type ultrafiltration MBR system, 5-nanofiltration system, 6-gas-liquid contact type vapo(u)rization system, 7-excess sludge treatment system, 8-accident pool, 11-basket filter, 12-settling pit, 13-equalizing tank, 21-anaerobism intake pump, 22-EUASB anaerobic reactor, 23-anaerobism circulatory pool, 24-anaerobism recycle pump, 31-denitrification pond, 32-nitrification tank, 33-stirrer, 34-aeration recycle pump, 35-roots blower, 36-jet aerator, 41-ultrafiltration intake pump, 42-ultrafiltration MBR film group, 43-ultrafiltration recycle pump, 44-ultrafiltration scavenging pump, 45-cleaning barrels, the former bucket of 51-nanofiltration, 52-nanofiltration intake pump, 53-nanofiltration high-pressure pump, 54-nanofiltration membrane group, 55-cleaning barrels, 56-nanofiltration scavenging pump, 57-nanofiltration dope storage tank, 61-vapo(u)rization system intake pump, 62-gas-liquid contact type evaporation unit, 71-sludge thickener, 72-dewatering centrifuge, 73-medicine-adding bin, 74-dosing pump, 75-sludge pump.
embodiment
As shown in Figure 1, high concentrated organic wastewater and percolate zero-discharge treatment system, its primary structure is by preprocessing system, anaerobic system, nitration denitrification system, tubular type ultrafiltration MBR system, nanofiltration system, gas-liquid contact type vapo(u)rization system, excess sludge treatment system, accident pool forms, wherein preprocessing system is connected by pipeline with anaerobic system, anaerobism circulatory pool in anaerobic system is fixed side by side and is connected with the denitrification pond in nitration denitrification system, nitration denitrification system is connected by pipeline with tubular type ultrafiltration MBR system, tubular type ultrafiltration MBR system is connected by pipeline with nanofiltration system, nanofiltration system is connected by pipeline with gas-liquid contact type vapo(u)rization system, tubular type ultrafiltration MBR system is connected by pipeline with excess sludge treatment system, accident pool is connected with the basket filter in preprocessing system by waste pipe.
Described preprocessing system, its structure comprises: basket filter, settling pit, equalizing tank, wherein basket filter is connected by pipeline with settling pit, settling pit is fixed side by side and is connected with equalizing tank, basket filter, can elimination large granular impurity, settling pit, further precipitated impurities, the equalizing tank regulating water quality water yield and acidification hydrolization.
Described system for anaerobic treatment, its structure consists of: anaerobism intake pump, EUASB anaerobic reactor, anaerobism circulatory pool, anaerobism recycle pump, wherein anaerobism intake pump is connected by pipeline with EUASB anaerobic reactor, EUASB anaerobic reactor is fixed side by side and is connected with anaerobism circulatory pool, anaerobism circulatory pool is connected by pipeline with anaerobism recycle pump, EUASB anaerobic reactor is removed and to be oozed most of organism in drop liquid, and anaerobism circulatory pool can mixing anaerobic pond clear liquid and regulated follow-up water inlet.
Described nitration denitrification system, its structure is by denitrification pond, nitrification tank, stirrer, aeration recycle pump, roots blower, jet aerator forms, wherein stirrer is fixedly installed in denitrification pond, denitrification pond is fixed side by side and is connected with nitrification tank, nitrification tank is connected by pipeline with aeration recycle pump, aeration recycle pump is connected by pipeline with jet aerator, jet aerator is fixedly installed in nitrification tank, roots blower is connected by pipeline with jet aerator, utilize the denitrification in denitrification pond to remove nitric nitrogen, and then utilize nitrification tank nitrification by mineralized nitrogen for nitric nitrogen and significantly remove organism, ultrafiltration MBR system, plays the effect of Separation of Water and impurity.
Described tubular type ultrafiltration MBR system, its structure consists of: ultrafiltration intake pump, ultrafiltration MBR film group, ultrafiltration recycle pump, ultrafiltration scavenging pump, cleaning barrels, wherein ultrafiltration intake pump is connected by pipeline with ultrafiltration recycle pump, ultrafiltration recycle pump is connected by pipeline with ultrafiltration MBR film group, ultrafiltration scavenging pump is connected by pipeline with ultrafiltration recycle pump, cleaning barrels is connected by pipeline with ultrafiltration scavenging pump, and ultrafiltration membrane system adopts the 8 cun of external PVDF ultrafiltration of 3m MBR film groups.
Described nanofiltration system, its structure is by nanofiltration former bucket, nanofiltration intake pump, nanofiltration high-pressure pump, nanofiltration membrane group, cleaning barrels, nanofiltration scavenging pump, nanofiltration dope storage tank forms, wherein the former bucket of nanofiltration is connected by pipeline with nanofiltration intake pump, nanofiltration intake pump is connected by pipeline with nanofiltration high-pressure pump, cleaning barrels is connected by pipeline with nanofiltration scavenging pump, nanofiltration scavenging pump is connected by pipeline with nanofiltration high-pressure pump, nanofiltration high-pressure pump is connected by pipeline with nanofiltration membrane group, nanofiltration membrane group is connected by pipeline with nanofiltration dope storage tank, nanofiltration membrane treatment system plays the effect of the impurity that dams by nanofiltration membrane component.
Described gas-liquid contact type vapo(u)rization system, its structure consists of: vapo(u)rization system intake pump, gas-liquid contact type evaporation unit, wherein nanofiltration dope storage tank is connected by pipeline with vapo(u)rization system intake pump, vapo(u)rization system intake pump is connected by pipeline with gas-liquid contact type evaporation unit, thereby gas-liquid contact type vapo(u)rization system realizes by low-temperature evaporation the object that solid-liquid separation reaches pollution substance zero release.
Described excess sludge treatment system, its structure consists of: sludge thickener, dewatering centrifuge, medicine-adding bin, dosing pump, sludge pump, wherein sludge thickener is connected by pipeline with sludge pump, sludge pump is connected by pipeline with dewatering centrifuge, medicine-adding bin is connected by pipeline with dosing pump, and dosing pump is connected by pipeline with dewatering centrifuge.
As shown in Figure 1, 2, the workflow of high concentrated organic wastewater of the present invention and percolate zero-discharge treatment system is as follows:
Oozing drop liquid and after the basket filter elimination macrobead thing impurity in preprocessing system, enter settling pit and further precipitate, enter afterwards the equalizing tank regulating water quality water yield pre-acidification hydrolization, is that subsequent disposal operation reduces pollutant load;
Equalizing tank sewage is in anaerobism intake pump is promoted to EUASB anaerobic reactor, interior by the organic substance in the metabolism Decomposition Wastewater of anaerobion, make deliquescent organic substance through a series of biological process, most of organism in drop liquid is oozed in removal, reduce COD, oozing majority of organic pollutants in drop liquid removes, in this stage, COD obtains reduction to a certain extent, the mode that anaerobism circulation adopts reaction zone circulation and effluent recycling to combine, for avoiding causing secondary pollution, the biogas of generation is collected and sends into power plant's garbage warehouse;
Anaerobism circulatory pool water outlet gravity flow enters nitration denitrification and tubular type ultrafiltration MBR system, take the form of Prepositive denitrification, in nitration denitrification system, because making the water outlet of anaerobism circulatory pool, fully mixes with nitrated section of phegma stirrer stirring action in denitrification pond, under low dissolved axygen state, through denitrification, remove nitric nitrogen, then enter nitrification tank, in nitration reaction section, under high-solubility oxygen state, through sufficient nitration reaction, in water, mineralized nitrogen is nitric nitrogen, the substrate concentration of organic contamination simultaneously significantly reduces, the mixed solution of nitrated section enters external pipe type ultrafiltration MBR system, in tubular type ultrafiltration MBR system, establish large flow ultrafiltration recycle pump, by large flow, circulate in film surface and form high velocity turbulent flow, pollutent is difficult in film surface attachment, by recycle pump, form transmembrane pressure simultaneously, water component in muddy water mixed solution sees through film and forms through liquid discharge, see through liquid or qualified discharge or enter next processing unit and continue to process, mixed solution after concentrated is still back to denitrification denilrification system increases sludge concentration, excess sludge drains into sludge thickener.
Ultrafiltration is produced water and is entered nanofiltration membrane treatment system through nanofiltration intake pump and the pressurization of nanofiltration high-pressure pump, utilizes the crown_interception of nanofiltration membrane component to solute, and every contamination index is reduced; Nanofiltration dope processes by gas-liquid contact type vapo(u)rization system the zero release that realizes pollution substance.
The excess sludge that biochemical system produces enters sludge thickener and carries out concentration, and the residue that the mud after concentrating and gas-liquid contact type vapo(u)rization system produce is promoted to dewatering centrifuge centrifuge dehydration by sludge pump, and the backflow of desliming clear liquid enters biochemical system and continues to process.Because contained organism in mud is effective bioenergy, dry mud can produce the heat of 16.65-20.93MJ/t, is a kind of low calorie fuels.This mud water ratio after concentration is 80% left and right, becomes mud cake shape, is about 0.6t every day, and dehydrated sludge can not cause secondary pollution to environment in course of conveying, can be transported to incinerator and domestic garbage mixing burning disposal.
[0046] two pollutant reaches < < integrated wastewater discharge standard > > (GB 8978-1996) grade III Standard, and specific targets see the following form:
Water outlet Pollutant emission concentration limit value
In table: UF is that tubular type ultrafiltration MBR system is processed, NF is that nanofiltration system is processed.

Claims (9)

1. high concentrated organic wastewater and percolate zero-discharge treatment system, its primary structure is by preprocessing system, anaerobic system, nitration denitrification system, tubular type ultrafiltration MBR system, nanofiltration system, gas-liquid contact type vapo(u)rization system, excess sludge treatment system, accident pool forms, it is characterized in that: wherein preprocessing system is connected by pipeline with anaerobic system, anaerobism circulatory pool in anaerobic system is fixed side by side and is connected with the denitrification pond in nitration denitrification system, nitration denitrification system is connected by pipeline with tubular type ultrafiltration MBR system, tubular type ultrafiltration MBR system is connected by pipeline with nanofiltration system, nanofiltration system is connected by pipeline with gas-liquid contact type vapo(u)rization system, tubular type ultrafiltration MBR system is connected by pipeline with excess sludge treatment system, accident pool is connected with the basket filter in preprocessing system by waste pipe.
2. high concentrated organic wastewater as claimed in claim 1 and percolate zero-discharge treatment system, it is characterized in that: described preprocessing system, its structure comprises: basket filter, settling pit, equalizing tank, wherein basket filter is connected by pipeline with settling pit, and settling pit is fixed side by side and is connected basket filter with equalizing tank, can elimination large granular impurity, settling pit, further precipitated impurities, the equalizing tank regulating water quality water yield and acidification hydrolization.
3. high concentrated organic wastewater as claimed in claim 1 and percolate zero-discharge treatment system, it is characterized in that: described system for anaerobic treatment, its structure is by anaerobism intake pump, EUASB anaerobic reactor, anaerobism circulatory pool, anaerobism recycle pump forms, wherein anaerobism intake pump is connected by pipeline with EUASB anaerobic reactor, EUASB anaerobic reactor is fixed side by side and is connected with anaerobism circulatory pool, anaerobism circulatory pool is connected by pipeline with anaerobism recycle pump, EUASB anaerobic reactor is removed and is oozed most of organism in drop liquid, anaerobism circulatory pool can mixing anaerobic pond clear liquid and is regulated follow-up water inlet.
4. high concentrated organic wastewater as claimed in claim 1 and percolate zero-discharge treatment system, it is characterized in that: described nitration denitrification system, its structure is by denitrification pond, nitrification tank, stirrer, aeration recycle pump, roots blower, jet aerator forms, wherein stirrer is fixedly installed in denitrification pond, denitrification pond is fixed side by side and is connected with nitrification tank, nitrification tank is connected by pipeline with aeration recycle pump, aeration recycle pump is connected by pipeline with jet aerator, jet aerator is fixedly installed in nitrification tank, roots blower is connected by pipeline with jet aerator, utilize the denitrification in denitrification pond to remove nitric nitrogen, and then utilize nitrification tank nitrification by mineralized nitrogen for nitric nitrogen and significantly remove organism, ultrafiltration MBR system, plays the effect of Separation of Water and mud on the one hand, on the other hand, plays the function of reservation and enhancement microbiological system.
5. high concentrated organic wastewater as claimed in claim 1 and percolate zero-discharge treatment system, it is characterized in that: described tubular type ultrafiltration MBR system, its structure is by ultrafiltration intake pump, ultrafiltration MBR film group, ultrafiltration recycle pump, ultrafiltration scavenging pump, cleaning barrels forms, wherein ultrafiltration intake pump is connected by pipeline with ultrafiltration recycle pump, ultrafiltration recycle pump is connected by pipeline with ultrafiltration MBR film group, ultrafiltration scavenging pump is connected by pipeline with ultrafiltration recycle pump, cleaning barrels is connected by pipeline with ultrafiltration scavenging pump, ultrafiltration membrane system adopts the 8 cun of external PVDF ultrafiltration of 3m MBR film groups.
6. high concentrated organic wastewater as claimed in claim 1 and percolate zero-discharge treatment system, it is characterized in that: described nanofiltration system, its structure is by nanofiltration former bucket, nanofiltration intake pump, nanofiltration high-pressure pump, nanofiltration membrane group, cleaning barrels, nanofiltration scavenging pump, nanofiltration dope storage tank forms, wherein the former bucket of nanofiltration is connected by pipeline with nanofiltration intake pump, nanofiltration intake pump is connected by pipeline with nanofiltration high-pressure pump, cleaning barrels is connected by pipeline with nanofiltration scavenging pump, nanofiltration scavenging pump is connected by pipeline with nanofiltration high-pressure pump, nanofiltration high-pressure pump is connected by pipeline with nanofiltration membrane group, nanofiltration membrane group is connected by pipeline with nanofiltration dope storage tank.
7. high concentrated organic wastewater as claimed in claim 1 and percolate zero-discharge treatment system, it is characterized in that: described gas-liquid contact type vapo(u)rization system, its structure consists of: vapo(u)rization system intake pump, gas-liquid contact type evaporation unit, wherein nanofiltration dope storage tank is connected by pipeline with vapo(u)rization system intake pump, vapo(u)rization system intake pump is connected by pipeline with gas-liquid contact type evaporation unit, thereby gas-liquid contact type vapo(u)rization system realizes by low-temperature evaporation the object that solid-liquid separation reaches pollution substance zero release.
8. high concentrated organic wastewater as claimed in claim 1 and percolate zero-discharge treatment system, it is characterized in that: described excess sludge treatment system, its structure consists of: sludge thickener, dewatering centrifuge, medicine-adding bin, dosing pump, sludge pump, wherein sludge thickener is connected by pipeline with sludge pump, sludge pump is connected by pipeline with dewatering centrifuge, medicine-adding bin is connected by pipeline with dosing pump, and dosing pump is connected by pipeline with dewatering centrifuge.
9. high concentrated organic wastewater as claimed in claim 1 and percolate zero-discharge treatment system, it is characterized in that: the workflow of high concentrated organic wastewater of the present invention and percolate zero-discharge treatment system is as follows: ooze drop liquid and after basket filter elimination macrobead thing impurity, enter settling pit and further precipitate, enter afterwards the equalizing tank regulating water quality water yield pre-acidification hydrolization, for subsequent disposal operation reduces pollutant load;
Sewage in equalizing tank is in anaerobism intake pump is promoted to EUASB anaerobic reactor, in EUASB anaerobic reactor by the organic substance in the metabolism Decomposition Wastewater of anaerobion, make deliquescent organic substance through a series of biological process, most of organism in drop liquid is oozed in removal, reduce COD, oozing majority of organic pollutants in drop liquid removes, in this stage, COD obtains reduction to a certain extent, the mode that anaerobism circulation adopts reaction zone circulation and effluent recycling to combine, for avoiding causing secondary pollution, the biogas producing is collected and sends into power plant's garbage warehouse,
Anaerobism circulatory pool water outlet gravity flow enters anoxic/aerobic membrane bioreactor, reactor is taked the form of Prepositive denitrification, in nitration denitrification system, due to stirrer in denitrification pond, after stirring action, make the water outlet of anaerobism circulatory pool fully mix with nitrated section of phegma, under low dissolved axygen state, through denitrification, remove nitric nitrogen, then enter nitrification tank; In nitrification tank, the jet-flow aeration of jet aerator makes mixed solution in pond be high-solubility oxygen state, and through sufficient nitration reaction, in water, mineralized nitrogen is nitric nitrogen, and the substrate concentration of organic contamination simultaneously significantly reduces; The mixed solution of nitrification tank enters external pipe type ultrafiltration MBR system, in system, establish large flow ultrafiltration recycle pump, by large flow, circulate in film surface and form high velocity turbulent flow, pollutent is difficult in film surface attachment, by recycle pump, form transmembrane pressure simultaneously, water component in muddy water mixed solution sees through film and forms through liquid discharge, see through liquid or qualified discharge or enter next processing unit and continue to process, mixed solution after concentrated is still back to denitrification pond and digester increases sludge concentration, and excess sludge drains into sludge thickener;
Ultrafiltration is produced water and is entered nanofiltration membrane system through nanofiltration intake pump and the pressurization of nanofiltration high-pressure pump, utilizes the crown_interception of nanofiltration membrane component to solute, and every contamination index is reduced, and nanofiltration dope processes by gas-liquid contact type vapo(u)rization system the zero release that realizes pollution substance;
The excess sludge that biochemical system produces enters sludge thickener and carries out concentration, and the residue that the mud after concentrating and gas-liquid contact type vapo(u)rization system produce is promoted to dewatering centrifuge centrifuge dehydration by sludge pump, and the backflow of desliming clear liquid enters biochemical system and continues to process; Because contained organism in mud is effective bioenergy, dry mud can produce the heat of 16.65-20.93MJ/t, for a kind of low calorie fuels, mud water ratio after concentration is 80% left and right, become mud cake shape, be about 0.6t every day, dehydrated sludge can not cause secondary pollution to environment in course of conveying, can be transported to incinerator and domestic garbage mixing burning disposal.
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