CN105967445A - Biochemical treatment system and method of waste water through conny pressure gasification - Google Patents
Biochemical treatment system and method of waste water through conny pressure gasification Download PDFInfo
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- CN105967445A CN105967445A CN201610460729.6A CN201610460729A CN105967445A CN 105967445 A CN105967445 A CN 105967445A CN 201610460729 A CN201610460729 A CN 201610460729A CN 105967445 A CN105967445 A CN 105967445A
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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
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- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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- 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
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- 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
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2813—Anaerobic digestion processes using anaerobic contact processes
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
- C02F3/2873—Particular arrangements for anaerobic reactors with internal draft tube circulation
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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
Abstract
The invention discloses a biochemical treatment system and method of waste water through conny pressure gasification and belongs to the field of waste water treatment. The system comprises a lift pump, a bicirculating anaerobic filler reaction system, an anoxic-multistage aerobiotic system, a coagu-flocculation reaction tank, a coagulative precipitation tank and a clear water tank connected in sequence, wherein a defoaming water pipe is arranged between the clear water tank and the anoxic-multistage aerobiotic system; the lift pump is provided with a water inlet pipe for introducing conny pressure gasification waste water pretreatment effluent; the clear water tank is provided with a water outlet pipe for discharging treated effluent. In the system, the bicirculating anaerobic filler reaction system hydrolyzes macromolecular organic matters into low molecular organic matters to improve biodegradability of waste water; the anoxic-multistage aerobiotic system can realize decarburization and denitrification functions to greatly reduce effluent COD, ammonia nitrogen and total nitrogen. The system is excellent in treatment effect, low in operating cost, and simple to operate.
Description
Technical field
The present invention relates to field of waste water treatment, particularly relate to biochemical treatment system and the side of a kind of crushed coal pressure gasifying waste water
Method.
Background technology
Crushed coal pressure gasifying technique (with lurgi gasifier as representative) is a kind of coal being widely used in coal gasification particularly natural gas from coal
Gasifying process.This technical maturity, investment and operating cost are relatively low, but its waste water processes the application constraining this technology.
Containing biodegradable organic compoundses such as substantial amounts of phenols, arene, heterocyclic compounds in crushed coal pressure gasifying waste water；And
Oil containing high concentration, ammonia nitrogen, salt；Biodegradability is very poor, and microorganism is had inhibitory action, adds this waste water quality ripple
Dynamic amplitude reaches, and the biochemical treatment treatment effeciency therefore using routine is low, and capacity of resisting impact load is poor, is difficult to effectively process such
Waste water.Therefore develop efficient, practical biochemical processing process to be particularly important.
The most common crushed coal pressure gasifying wastewater biochemical processes and mainly uses anaerobism+AO technique, but due to high in waste water
The difficult degradation of concentration and toxic pollutant, make biochemical system be suppressed, and sludge activity is low, poor processing effect, adds coal
Gasification waste water variation water quality is big, and in causing system, microorganism is difficult to growth and breeding, and treatment effect is more difficult to ensure.
Summary of the invention
Based on the problem existing for above-mentioned prior art, the present invention provide a kind of crushed coal pressure gasifying biochemical treatment of wastewater and
Method, can solve crushed coal pressure gasifying waste water because of toxicity greatly, and biodegradability is poor, and variation water quality is big, and routine biochemistry system is because of place
Decarburization during reason crushed coal pressure gasifying waste water, the problem that denitrification effect is poor, impact resistance is poor.
For solving above-mentioned technical problem, the present invention provides a kind of crushed coal pressure gasifying biochemical treatment of wastewater, including:
Elevator pump, double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system, coagulation reaction tank, coagulative precipitation tank,
Clear water reserviors, return duct, reflux pump, froth breaking water pump, froth breaking water pipe and aerating system；Wherein；
Described elevator pump sinks with double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system, coagulation reaction tank, coagulation
Pond, shallow lake and clear water reserviors are sequentially connected with；
Described clear water reserviors return be connected to described anoxia-multi-stage aerobic system by being provided with the froth breaking water pipe of froth breaking water pump；
Described clear water reserviors return be connected to described double-cycling anaerobic filler response system by being provided with the return duct of reflux pump；
Described elevator pump is provided with the water inlet pipe introducing crushed coal pressure gasifying Wastewater Pretreatment water outlet；Described clear water reserviors are provided with at discharge
The outlet pipe of water outlet after reason.
The embodiment of the present invention also provides for a kind of crushed coal pressure gasifying biochemical procss for treating waste water, uses at biochemistry of the present invention
Reason system, comprises the following steps:
Through the crushed coal pressure gasifying waste water described biochemical treatment system of entrance of breakdown of emulsion pretreatment, boosted pump sequentially enters after promoting
Described double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system, coagulation reaction tank, coagulative precipitation tank process,
After the water outlet of described coagulative precipitation tank enters clear water reserviors, standard water discharge is discharged or carries out advanced treating.
The invention have the benefit that by by elevator pump, double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system,
Coagulation reaction tank, coagulative precipitation tank organic linking, form one and crushed coal pressure gasifying waste water can carry out reinforced anaerobic life successively
Thing processes, strengthening Anoxybiotic-aerobic biologic processes and the biochemical treatment system of coagulating kinetics.Crushed coal pressure gasifying waste water contains
A large amount of hardly degraded organic substances such as heterocycle, polycyclic aromatic hydrocarbon, high saliferous, high ammonia nitrogen, high oil-containing, biodegradability is poor.The present invention's
Processing system can be lowered into double-cycling anaerobic by the setting of effluent recycling and double-cycling anaerobic filler response system outer circulation
The pollutant levels of filler response system, reduce the noxious substance adverse effect to system；Reacted by double-cycling anaerobic filler
In system, the setting of circulation can improve the mass transfer in reactor, and the collision accelerated between biochemical reaction, the most beneficially carrier rubs
Wipe, it is simple to the biofilm detachment on carrier and continuous renewal；The interpolation of bio-carrier can be with the micro-life of anaerobism that enrichment and growth is slower
Thing, improves the sludge concentration in reactor, reinforced anaerobic biochemical reaction；Filling and the replacing of carrier is easy in the setting of carrier cage,
Carrier is prevented to run off.Anoxia-multi-stage aerobic system makes each pond realize different functions by the control of function carrier and dissolved oxygen,
Function carrier can strengthen every pollutant removal function, thus realizes the efficient removal to organic and ammonia nitrogen.Coagulation reaction tank and
The float arranged in removable water of coagulative precipitation tank and colloid, reduce water outlet COD further.In sum, the present invention
Accepting/ordering system, by double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system and the combination of mixed sinking system, is root
The selection process determined according to the character of crushed coal pressure gasifying waste water, has decarburization, nitric efficiency height；Capacity of resisting impact load is strong,
The advantage that sludge output is low, operating cost is low.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, in describing embodiment below, required use is attached
Figure is briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the present invention, for ability
From the point of view of the those of ordinary skill in territory, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings attached
Figure.
Fig. 1 is the schematic diagram of the crushed coal pressure gasifying biochemical treatment of wastewater that the embodiment of the present invention provides；
In Fig. 1: 1-elevator pump；2-double-cycling anaerobic filler response system (i.e. BACB system)；21-internal circulating anaerobic carries
Reactor according；22-circulating tank；23-circulating pump；3-anoxia-multi-stage aerobic system (i.e. AOnSystem) 31-A pond；32-O1
Pond；33-O2 pond；34-O3 pond；35-sedimentation tank；36-mixed-liquor return pump；37-sludge reflux pump；4-coagulation reaction tank；
5-coagulative precipitation tank；6-clear water reserviors；7-froth breaking water pump；8-reflux pump；9-froth breaking water pipe；10-return duct；A-water inlet pipe；
B-outlet pipe；
Fig. 2 is the schematic diagram of the internal circulating anaerobic carrier reactor of the processing system that the embodiment of the present invention provides；
In Fig. 2: 211-water inlet pipe；212-water distribution system；213-guide shell；214-cage；215-bio-carrier；216-three-phase
Separator；217-collecting system；218-outlet pipe.
Detailed description of the invention
Below the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only
It is only a part of embodiment of the present invention rather than whole embodiments.Based on embodiments of the invention, ordinary skill
The every other embodiment that personnel are obtained under not making creative work premise, broadly falls into protection scope of the present invention.
Below in conjunction with specific embodiment, processing system and the method for the present invention are described further.
As it is shown in figure 1, the embodiment of the present invention provides a kind of crushed coal pressure gasifying biochemical treatment of wastewater, it is possible to resolve conventional raw
The problem that change system processes decarburization when processing crushed coal pressure gasifying waste water, denitrification effect is poor, impact resistance is poor, this system bag
Include:
Elevator pump, double-cycling anaerobic filler response system (i.e. BACB system), anoxia-multi-stage aerobic system (i.e. AOnSystem),
Coagulation reaction tank, coagulative precipitation tank, clear water reserviors, reflux pump, return duct, froth breaking water pump, froth breaking water pipe and aerating system；
Wherein；
Elevator pump and double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system, coagulation reaction tank, coagulative precipitation tank
It is sequentially connected with clear water reserviors；
Clear water reserviors return be connected to anoxia-multi-stage aerobic system by being provided with the froth breaking water pipe of froth breaking water pump；
Clear water reserviors return be connected to double-cycling anaerobic filler response system by being provided with the return duct of reflux pump；
Elevator pump is provided with the water inlet pipe introducing crushed coal pressure gasifying Wastewater Pretreatment water outlet；Clear water reserviors are provided with water outlet after discharge processes
Outlet pipe.
In above-mentioned biochemical treatment system, double-cycling anaerobic filler response system includes:
Internal circulating anaerobic carrier reactor, circulating tank and circulating pump；Wherein,
Internal circulating anaerobic carrier reactor is sequentially connected with circulating tank, and circulating tank is connected to internal circulating anaerobic with circulation blowback by the road
At the water inlet of carrier reactor, clear water reserviors water outlet is back to double-cycling anaerobic filler response system water inlet end by reflux pump, can
Anaerobic system is diluted, alleviates the impact of toxicant；
As in figure 2 it is shown, internal circulating anaerobic packed column reactor is cylindrical reactor, this reactor bottom is provided with water inlet pipe, enters
The water distribution system that water pipe is arranged with this reactor inner bottom part is connected, and in this reactor, middle part is provided with guide shell, in guide shell
Being filled with bio-carrier, bio-carrier may be provided in cage, is fixed in guide shell by cage, and this reactor internal upper part is provided with three
Phase separator, collecting system (can use effluent weir) and gas gathering system (not shown in Fig. 2), this reactor top is provided with
Outlet pipe.
The internal circulating anaerobic carrier reactor of above-mentioned this structure, is loaded on bio-carrier in cage, it is simple to load and change.Cloth
Water system is positioned at below guide shell, and the setting of guide shell circulates in being formed in making reactor.Circulating tank water outlet is by circulation blowback
In anaerobism carrier reactor, upflow velocity certain in guide shell can being realized by the control of circulating load.
In above-mentioned biochemical treatment system, anoxia-multi-stage aerobic system includes: A pond, O1, O2, O3 pond, sedimentation tank, mixing
Liquid reflux pump and sludge reflux pump；Wherein, A pond, O1, O2, O3 pond and sedimentation tank are sequentially connected with, and O3 pond by the road and is mixed
Closing liquid backflow blowback and be connected to A pond, O3 pond mud mixed liquid is returned A pond by mixed-liquor return pump；Sedimentation tank returns with mud by the road
Stream blowback is connected to A pond, and partly precipitated pond mud is returned A pond by sludge reflux pump；
The carrier of fixing different microorganisms it is respectively equipped with in A pond, O1, O2 and O3 pond, concrete, A pond, O1, O2 and O3 pond
Different carriers is added, with fixing different microorganism, A pond, exit, O1, O2 and O3 pond according to its function to be realized
It is respectively provided with the grid of intercepting padding material；A is provided with diving mixer in pond；O1, O2 and O3 pond inner bottom part is provided with and external blower
The aerating pipelines connected and micro-hole aerator, aerator, aerating pipelines and micro-hole aerator constitute aerating system；
Clear water reserviors return respectively be connected to O1, O2 and O3 pond of anoxia-multi-stage aerobic system by being provided with the froth breaking water pipe of froth breaking water pump,
Clear water reserviors water outlet enters the Aerobic Pond of anoxia-multi-stage aerobic system by froth breaking water pump, for eliminating the bubble of generation, simultaneously
Also function to diluting effect, alleviate the impact of toxicant.
In above-mentioned biochemical treatment system, in coagulation reaction tank, it is provided with the mixing pit and reaction tank being sequentially connected with, mixing pit and reaction
Mechanical stirring device it is equipped with in pond；Reaction tank uses thtee-stage shiplock structure, is equipped with mechanical stirring device in every order reaction pond,
And reaction tank stir speed (S.S.) the most at different levels reduces step by step.
In above-mentioned biochemical treatment system, coagulative precipitation tank uses horizontal sedimentation tank, radial-flow sedimentation tank or vertical sedimentation basin.
In above-mentioned biochemical treatment system, double-cycling anaerobic filler response system under anaerobic makes larger molecular organics be hydrolyzed into
Small organic molecule, improves wastewater biodegradability；In anoxia-multi-stage aerobic system, A pond can realize denitrification and hydrolysis acidification
Function, O1 pond realizes oxidation of coal and synchronizes short-cut nitrification-denitrification function, and O2 pond realizes oxidation of coal and nitrification function, O3 pond
Mainly realize nitrification function.AOnSystem can realize decarburization and denitrification functions, makes water outlet COD, ammonia nitrogen and total nitrogen be greatly reduced.
This system high treating effect, operating cost are low, simple to operate.
The embodiment of the present invention also provides for a kind of crushed coal pressure gasifying biochemical procss for treating waste water, uses above-mentioned biochemical treatment system,
Comprise the following steps:
Through the crushed coal pressure gasifying waste water entrance biochemical treatment system of breakdown of emulsion pretreatment, boosted pump sequentially enters double following after promoting
Ring anaerobism filler response system, anoxia-multi-stage aerobic system, coagulation reaction tank, coagulative precipitation tank process, and coagulation sinks
After the water outlet in pond, shallow lake enters clear water reserviors, standard water discharge is discharged or carries out advanced treating；
Wherein, in O1, O2, O3 pond of anoxia-multi-stage aerobic system, it is passed through air and carries out biochemical reaction；To coagulating
Pond dosing coagulant and flocculant carry out coagulating；The coagulant added in coagulation reaction tank can use aluminium polychlorid,
The inorganic polymers such as bodied ferric sulfate, the flocculant added can use the organic high molecular polymers such as polyacrylamide；
The dosage of coagulant is 100～500mg/L；The dosage of flocculant is 1～5mg/L.
In above-mentioned biochemical processing method, crushed coal pressure gasifying waste water enters the process of double-cycling anaerobic filler response system and is:
The breakdown of emulsion pretreatment crushed coal pressure gasifying waste water carried by elevator pump and waste water and backflow in the circulating tank of circulating pump conveying
In the clear water reserviors of transport pump after waste water three mixing, enter the internal circulating anaerobic of double-cycling anaerobic filler response system through water inlet pipe
The water distribution system of carrier reactor；
Below the water distribution guide shell of water distribution system, rise inside guide shell, decline outside guide shell, at internal circulating anaerobic
Circulation in being formed in carrier reactor；Owing to water distribution system is positioned at below guide shell, three bursts of water mixed traffics are big, add and lead
The setting of flow cartridge so that the mass transfer in upflow velocity can maintain higher level, beneficially system in guide shell, adds fast-growing
Change reaction, the most beneficially collision friction between carrier, it is simple to the biofilm detachment on carrier and the widest renewal.
Anaerobic activated sludge in the anaerobe adhered on carrier in internal circulating anaerobic carrier reactor and this reactor is altogether
Under same-action, the larger molecular organics in waste water is hydrolyzed acidifying, is degraded to small organic molecule, improves wastewater biochemical,
Being beneficial to subsequent biochemical process, part small organic molecule is converted into methane and carbon dioxide by the effect of methanogen and discharges,
Mud mixed liquid and the gas of generation in internal circulating anaerobic carrier reactor enter at the three phase separator of this reactor internal upper part
Circulation of qi promoting solid-liquor separation, gas enters gas gathering system after-combustion discharge, and mud returns in this internal circulating anaerobic carrier reactor
Portion continues biochemical reaction, and waste water then enters collecting system and then enters circulating tank through outlet pipe.In circulating tank, water is beaten through circulating pump
Enter internal circulating anaerobic carrier reactor, water inlet is diluted.And carry the suppression of system with reduction difficult degradation toxic pollutant
The ability of high system anti-shock loading.
In above-mentioned biochemical processing method, in double-cycling anaerobic filler response system, dissolved oxygen is less than 0.2mg/L, following of circulating pump
Circular rector is the 200～2000% of flow of inlet water, and the capacity of returns of reflux pump is 50～200%, double-cycling anaerobic filler response system
Hydraulic detention time is 20～50h.
In above-mentioned biochemical processing method, crushed coal pressure gasifying waste water in the intrasystem process of anoxia-multi-stage aerobic is:
The circulating tank water outlet of double-cycling anaerobic filler response system enters anoxia-multi-stage aerobic system, flow through successively A pond, O1 pond,
O2 pond, O3 pond and sedimentation tank；Wherein, clarifier sludge part is back to A pond by sludge reflux pump, and excess sludge is through dehydration
Rear disposal；Mud mixed liquid blended liquid reflux pump in O3 pond is back to A pond；
A pond, O1, O2 and O3 pond add the different carriers of fixing different microorganisms, by the control realization of dissolved oxygen not syngenesis
Thing degradation reaction, wherein A pond carries out denitrification and hydrolysis acidification reaction, and O1 pond carries out oxidation of coal and synchronizes short distance nitration-anti-nitre
Changing reaction, O2 pond carries out oxidation of coal and nitration reaction, and O3 pond carries out nitration reaction.
Concrete, the water outlet of BACB system circulating tank enters AOnSystem, flows through A pond, O1 pond, O2 pond, O3 pond successively and sinks
Pond, shallow lake.Clarifier sludge part is returned A pond by sludge reflux pump, and excess sludge is disposed after dehydration.The mud mixing of O3 pond
Liquid blended liquid reflux pump returns A pond.A pond, O1, O2 and O3 pond add different carriers according to its function to be realized, logical
Crossing the interception of water outlet grid, carrier is present in single pond, with fixing different microorganism and real by the control of dissolved oxygen
Existing different biological degradation function.AOnIn system, each pond is overall in plug-flow, but single pond is complete mixing flow, and mixed-liquor return realizes tradition
The nitrification of AO system, denitrification function.A pond can realize the function of denitrification and hydrolysis acidification, O1 pond realize oxidation of coal and with
Step short-cut nitrification-denitrification function, O2 pond realizes oxidation of coal and nitrification function, and O3 pond mainly realizes nitrification function.Function carries
The interpolation of body makes that some growths are slow, the microorganism of mud length in age is enriched with, and enhances the decarburization of anaerobic-aerobic system and de-
Nitrogen function, adds intrasystem sludge concentration simultaneously, reduces sludge loading, improves system impact resistance, decreases
The discharge of excess sludge.
In above-mentioned biochemical processing method, the dissolved oxygen in the A pond of anoxia-multi-stage aerobic system is less than the dissolving in 0.5mg/L, O1 pond
Oxygen is 0.3～1mg/L, and the dissolved oxygen in O1 pond is 1～2mg/L, and the dissolved oxygen in O2 pond is 2～4mg/L；Anoxia-multi-stage aerobic
The bio-carrier of system uses suspension type filler or suspending carrier, and the carrier with particular organisms degradation function needs to use before adding
Functional microorganism carries out pre-biofilm；The hydraulic detention time of anoxia-multi-stage aerobic system is 120～300h；
The hydraulic detention time of coagulation reaction tank is 15～45min；
The hydraulic detention time of coagulative precipitation tank is 2～6h.
The processing system of the present invention and method take to control difficult degradation and the technology of toxic pollutant of high concentration, and improve system
The mode of the Biomass of specific flora in system, reduces load and effectively solves the process to such waste water.
Below in conjunction with Fig. 1, to using the said system biochemical treatment process to crushed coal pressure gasifying waste water, it is specifically described,
Comprise the following steps:
Crushed coal pressure gasifying waste water is lifted into BACB system through elevator pump after breakdown of emulsion processes, and waste water is by anaerobism carrier reactor
Bottom enters, and the existence of guide shell makes waste water form interior circulation at anaerobism carrier inside reactor.Carrier cage is set in guide shell,
Bio-carrier it is filled with in cage.Also have anaerobism activity dirty in adhering to anaerobe, reactor on carrier in anaerobism carrier reactor
Mud；Under the two jointly effect, first the larger molecular organics in waste water is hydrolyzed acidifying, is degraded to small organic molecule, makes
Wastewater biodegradability improves, and beneficially subsequent biochemical processes.Part small organic molecule is converted into first by the effect of methanogen
Alkane and carbon dioxide are discharged.Anaerobism carrier reactor water outlet enters circulating tank, and the water in circulating tank returns anaerobism by circulating pump
Carrier reactor, so that waste water forms outer circulation.The setting of outer circulation can be lowered into the pollutant levels of BACB system,
Reduce the noxious substance adverse effect to system；The mass transfer in reactor can be improved by the setting of circulation in BACB system, add
Speed collision friction between biochemical reaction, the most beneficially carrier, it is simple to the biofilm detachment on carrier and the widest renewal.BACB
System water outlet enters AOnSystem.Flow through A pond, O1 pond, O2 pond, O3 pond and sedimentation tank successively.Clarifier sludge part is by dirt
Mud reflux pump returns A pond, and excess sludge is disposed after dehydration.Mud mixed liquid blended liquid reflux pump in O3 pond returns A pond.
AOnIn system, each pond is overall in plug-flow, but single pond is complete mixing flow, and mixed-liquor return realizes the tradition nitrification of AO system, denitrification
Function.Adding different carriers in A pond, O1, O2 and O3 pond, by the interception of water outlet grid, carrier is present in list simultaneously
In individual pond, with fixing different microorganism, and by the control realization difference biological degradation function of dissolved oxygen.Described A pond can
Realizing the function of denitrification and hydrolysis acidification, O1 pond realizes oxidation of coal and synchronizes short-cut nitrification-denitrification function, and O2 pond realizes
Oxidation of coal and nitrification function, O3 pond mainly realizes nitrification function.AOnSystem can realize decarburization and denitrification functions, make water outlet COD,
Ammonia nitrogen and total nitrogen are greatly reduced.Sedimentation tank water outlet enters adding of coagulation reaction tank, coagulant and flocculant and makes hanging in waste water
Float, colloid form big flocculating body, then carry out mud-water separation through coagulative precipitation tank, reduce waste water COD and turbidity further,
Improve effluent characteristics.Coagulative precipitation tank water outlet enters clear water reserviors, is discharged by outlet pipe or carries out Treatment for Reuse.Clear water reserviors
Water is back to BACB system, dilution water inlet pollutant levels by reflux pump, reduces high density pollution thing to micro-in BACB system
Biological inhibitory action, improves the ability of system anti-shock loading.Froth breaking water pump is also fetched water AO from clear water reserviorsnSystem aerobic
Pond, to eliminate a large amount of foams that aerobic system produces, froth breaking water may also function as diluting effect simultaneously, reduces system internal contamination thing
Suppression to aerobic system microorganism.
It is exemplified below embodiment so that the advanced treating effect of the present invention to be described, but scope of the presently claimed invention is not limited only to
This.
Embodiment 1
Processing certain coal gasification waste water with crushed coal pressure gasifying biochemical treatment of wastewater, treating capacity is 0.8m3/ h, temperature is
35℃.BACB system HRT is about 50h, AOnThe HRT of system is about 300h, and circulating pump circulating load is 800%, and mixed liquor returns
Stream is 300%, and reflux pump capacity of returns is 100%.Biochemical system influent COD is about 7000mg/L, and ammonia nitrogen is about 500mg/L,
After BACB system processes, water outlet COD is about 190mg/L, and ammonia nitrogen is less than 10mg/L, can reach " integrated wastewater discharge standard "
(GB8978-1996) secondary discharge standard.
Embodiment 2
Processing certain coal gasification waste water with crushed coal pressure gasifying biochemical treatment of wastewater, treating capacity is 1.2m3/ h, temperature is
35℃.BACB system HRT is about 33h, AOnThe HRT of system is about 200h, and circulating pump circulating load is 600%, mixed liquor
Backflow is 300%, and reflux pump capacity of returns is 100%.Biochemical system influent COD is about 6700mg/L, and ammonia nitrogen is about 450mg/L,
Through BACB system process after water outlet COD be about 270mg/L, ammonia nitrogen be less than 10mg/L, can discharge after ozone advanced treating or
Reuse.
The biochemical treatment system of the present invention is big for crushed coal pressure gasifying wastewater toxicity, and biodegradability is poor, the spy that variation water quality is big
Point, routine biochemistry system decarburization, denitrification effect are poor, the problem of impact resistance difference, propose a kind of carrier and strengthen function district
The biochemical treatment system of crushed coal pressure gasifying waste water and method.This biochemical treatment system includes anaerobism, anoxia, aerobic biochemical system
System, can be respectively processed for pollutant different in waste water.The anaerobic system of the first step is by bicirculating design and whole
Individual system flowback designs, dilution water inlet, reduces pollutant levels in water inlet, reduces high density pollution thing to anaerobic biological system
Suppression, improve system anti-shock loading ability.The anaerobe that bio-carrier can make growth slow simultaneously is enriched with in a large number, improves
Biomass and biochemical treatment efficiency.Anaerobic system water outlet enters " anoxia-multi-stage aerobic " system, controlled by dissolved oxygen step,
Mixed-liquor return and the setting of unit difference bio-carrier, realize hydrolysis acidification, denitrification, short inside each unit
The functions such as journey nitrification-denitrification, oxidation of coal, nitrification, effectively realize decarburization and denitrification functions.High treating effect of the present invention,
Operating cost is low, simple to operate, is the effective ways of crushed coal pressure gasifying waste water process.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, and appoints
How those familiar with the art is in the technical scope of present disclosure, the change that can readily occur in or replacement, all
Should contain within protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection domain of claims
It is as the criterion.
Claims (10)
1. a crushed coal pressure gasifying biochemical treatment of wastewater, it is characterised in that including:
Elevator pump, double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system, coagulation reaction tank, coagulative precipitation tank,
Clear water reserviors, return duct, reflux pump, froth breaking water pump, froth breaking water pipe and aerating system；Wherein；
Described elevator pump sinks with double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system, coagulation reaction tank, coagulation
Pond, shallow lake and clear water reserviors are sequentially connected with；
Described clear water reserviors return be connected to described anoxia-multi-stage aerobic system by being provided with the froth breaking water pipe of froth breaking water pump；
Described clear water reserviors return be connected to described double-cycling anaerobic filler response system by being provided with the return duct of reflux pump；
Described elevator pump is provided with the water inlet pipe introducing crushed coal pressure gasifying Wastewater Pretreatment water outlet；Described clear water reserviors are provided with at discharge
The outlet pipe of water outlet after reason.
Crushed coal pressure gasifying biochemical treatment of wastewater the most according to claim 1, it is characterised in that described Two-way Cycle
Anaerobism filler response system includes:
Internal circulating anaerobic carrier reactor, circulating tank and circulating pump；Wherein,
Described internal circulating anaerobic carrier reactor is sequentially connected with described circulating tank, described circulating tank by the road with described circulating pump
Return and be connected at the water inlet of described internal circulating anaerobic carrier reactor；
Described internal circulating anaerobic packed column reactor is cylindrical reactor, and this reactor bottom is provided with water inlet pipe, described water inlet pipe
The water distribution system arranged with this reactor inner bottom part is connected, and in this reactor, middle part is provided with guide shell, in described guide shell
Being filled with bio-carrier, this reactor internal upper part is provided with three phase separator, collecting system and gas gathering system, this reactor top
It is provided with outlet pipe；
Described clear water reserviors return be connected to the interior circulation of described double-cycling anaerobic filler response system by being provided with the return duct of reflux pump
At the water inlet of anaerobism carrier reactor.
Crushed coal pressure gasifying biochemical treatment of wastewater the most according to claim 1 and 2, it is characterised in that described scarce
Oxygen-multi-stage aerobic system includes: A pond, O1, O2, O3 pond, sedimentation tank, mixed-liquor return pump and sludge reflux pump；Wherein,
Described A pond, O1, O2, O3 pond and sedimentation tank are sequentially connected with, and described O3 pond is connected to described A with mixed-liquor return blowback by the road
Pond；Described sedimentation tank is connected to described A pond by the road with sludge reflux blowback；
The carrier of fixing different microorganisms, described A pond, O1, O2 and O3 it is respectively equipped with in described A pond, O1, O2 and O3 pond
Exit, pond is respectively provided with the grid of intercepting padding material；It is provided with diving mixer in described A pond；Described O1, O2 and O3 pond inner bottom part
It is provided with the aerating pipelines and micro-hole aerator being connected with external blower；
Described clear water reserviors by be provided with the froth breaking water pipe of froth breaking water pump respectively with the described O1 of described anoxia-multi-stage aerobic system,
O2 and O3 pond connects.
Crushed coal pressure gasifying biochemical treatment of wastewater the most according to claim 1 and 2, it is characterised in that described mixed
It is provided with, in solidifying reaction tank, the mixing pit and reaction tank being sequentially connected with, in described mixing pit and reaction tank, is equipped with mechanical agitation dress
Put；Described reaction tank uses thtee-stage shiplock structure, is equipped with mechanical stirring device in every order reaction pond, and the most at different levels
Reaction tank stir speed (S.S.) reduces step by step.
Crushed coal pressure gasifying biochemical treatment of wastewater the most according to claim 1 and 2, it is characterised in that described mixed
Solidifying sedimentation tank uses horizontal sedimentation tank, radial-flow sedimentation tank or vertical sedimentation basin.
6. a crushed coal pressure gasifying biochemical procss for treating waste water, it is characterised in that use any one of claim 1 to 5 institute
The biochemical treatment system stated, comprises the following steps:
Through the crushed coal pressure gasifying waste water described biochemical treatment system of entrance of breakdown of emulsion pretreatment, boosted pump sequentially enters after promoting
Described double-cycling anaerobic filler response system, anoxia-multi-stage aerobic system, coagulation reaction tank, coagulative precipitation tank process,
After the water outlet of described coagulative precipitation tank enters clear water reserviors, standard water discharge is discharged or carries out advanced treating.
Crushed coal pressure gasifying biochemical procss for treating waste water the most according to claim 6, it is characterised in that described broken coal adds
Pressure gasification waste water enters the process of described double-cycling anaerobic filler response system:
The breakdown of emulsion pretreatment crushed coal pressure gasifying waste water carried by described elevator pump is useless with in the circulating tank of described circulating pump conveying
In the clear water reserviors of water and the conveying of described reflux pump after waste water three mixing, enter the reaction of described double-cycling anaerobic filler through water inlet pipe
The water distribution system of the internal circulating anaerobic carrier reactor of system；
Below the water distribution guide shell of water distribution system, rise inside guide shell, decline outside guide shell, in described interior circulation
Circulation in being formed in anaerobism carrier reactor；
Anaerobism activity in the anaerobe adhered on carrier in described internal circulating anaerobic carrier reactor and this reactor is dirty
Mud acts on down jointly, and the larger molecular organics in waste water is hydrolyzed acidifying, is degraded to small organic molecule, improves wastewater biochemical
Property, mud mixed liquid in described internal circulating anaerobic carrier reactor and the gas of generation are at the three-phase separate of this reactor internal upper part
Carrying out gas-liquid-solid separation from device, gas enters gas gathering system after-combustion discharge, and it is anti-that mud returns to this internal circulating anaerobic carrier
Answering device internal continuation biochemical reaction, waste water then enters collecting system and then enters described circulating tank through outlet pipe.
8. according to the crushed coal pressure gasifying biochemical procss for treating waste water described in claim 6 or 7, it is characterised in that described double
In circulation anaerobic filler response system dissolved oxygen be less than 0.2mg/L, the circulating load of described circulating pump be flow of inlet water 200～
2000%, the capacity of returns of described reflux pump is 50～200%, the hydraulic detention time of described double-cycling anaerobic filler response system
It is 20～50h.
Crushed coal pressure gasifying biochemical procss for treating waste water the most according to claim 6, it is characterised in that described broken coal adds
Pressure gasification waste water in the described intrasystem process of anoxia-multi-stage aerobic is:
The circulating tank water outlet of described double-cycling anaerobic filler response system enters described anoxia-multi-stage aerobic system, flows through A successively
Pond, O1 pond, O2 pond, O3 pond and sedimentation tank；Wherein, clarifier sludge part is back to A pond by sludge reflux pump, residue
Mud is disposed after dehydration；Mud mixed liquid blended liquid reflux pump in O3 pond is back to A pond；
Described A pond, O1, O2 and O3 pond add the different carriers of fixing different microorganisms, by the control realization of dissolved oxygen not
Same bio-degradation reactions, wherein said A pond carries out denitrification and hydrolysis acidification reaction, and O1 pond carries out oxidation of coal and synchronizes short distance
Nitrification-denitrification reaction, O2 pond carries out oxidation of coal and nitration reaction, and O3 pond carries out nitration reaction.
10. according to the crushed coal pressure gasifying biochemical procss for treating waste water described in claim 6 or 9, it is characterised in that described scarce
The dissolved oxygen in the A pond of oxygen-multi-stage aerobic system is 0.3～1mg/L less than the dissolved oxygen in 0.5mg/L, O1 pond, the dissolving in O1 pond
Oxygen is 1～2mg/L, and the dissolved oxygen in O2 pond is 2～4mg/L；The bio-carrier of anoxia-multi-stage aerobic system uses suspension type to fill out
Material or suspending carrier；The hydraulic detention time of described anoxia-multi-stage aerobic system is 120～300h；
The hydraulic detention time of described coagulation reaction tank is 15～45min；
The hydraulic detention time of described coagulative precipitation tank is 2～6h.
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| WO2018094622A1 (en) * | 2016-11-23 | 2018-05-31 | 李静 | Serially-connected type wastewater biochemical treatment device |
| CN109110921A (en) * | 2018-10-09 | 2019-01-01 | 浙江海拓环境技术有限公司 | A kind of waste water denitrification denitrogenation reactor |
| CN111847809A (en) * | 2019-12-30 | 2020-10-30 | 重庆大学 | Kitchen waste fermentation wastewater treatment device and method |
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Application publication date: 20160928 |