CN108117220A - A kind of integrated conduct method of high slat-containing wastewater - Google Patents

A kind of integrated conduct method of high slat-containing wastewater Download PDF

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Publication number
CN108117220A
CN108117220A CN201611072016.9A CN201611072016A CN108117220A CN 108117220 A CN108117220 A CN 108117220A CN 201611072016 A CN201611072016 A CN 201611072016A CN 108117220 A CN108117220 A CN 108117220A
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fstb
microbial inoculum
concentration
salt tolerant
method described
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郭志华
高会杰
孙丹凤
赵胜楠
陈明翔
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China Petroleum and Chemical Corp
Sinopec Fushun Research Institute of Petroleum and Petrochemicals
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China Petroleum and Chemical Corp
Sinopec Fushun Research Institute of Petroleum and Petrochemicals
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/048—Purification of waste water by evaporation
    • 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
    • C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • 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
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/445—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by forward osmosis
    • 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
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2305/00—Use of specific compounds during water treatment
    • C02F2305/06—Nutrients for stimulating the growth of microorganisms
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/02—Softening water by precipitation of the hardness

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The present invention relates to a kind of integrated conduct method of high slat-containing wastewater, including（1）Pretreatment：Salt tolerant microbial inoculum and growth promoter are added in existing membrane bioreactor；（2）Coagulating sedimentation：Coagulating sedimentation is carried out using lime soda ash softening method；（3）Minimizing is handled：Minimizing processing is carried out to waste water after precipitation using reverse osmosis；（4）Biochemical treatment adds step（1）The salt tolerant microbial inoculum and growth promoter；（5）Concentration；（6）Crystallization treatment.Compared with prior art, the present invention in membrane bioreactor and biochemical treatment system using salt tolerant microbial inoculum and growth promoter by realizing the efficient removals of the pollutants such as COD and total nitrogen, fouling membrane can be effectively reduced, increases the service life of film, ensures system stable operation.

Description

A kind of integrated conduct method of high slat-containing wastewater
Technical field
The invention belongs to environment-protection wastewater processing technology fields, and in particular to a kind of integrated conduct method of high slat-containing wastewater.
Background technology
The either circulation of the industries such as coal chemical industry, petrochemical industry or oil gas field, DW system demineralized water system, discharging of boiler System and reuse water treatment system etc. can all discharge substantial amounts of brine waste.The usually total saliferous mass fraction of these brine wastes >= 1%, typically belong to used water difficult to degradate.In this waste water in addition to the inorganic salinity containing high concentration, also have containing refractory organics Machine object or noxious material, will necessarily be to aqueous bio, Drinking Water and workers and peasants if unprocessed be directly discharged into natural water body Industry industrial water generates greatly harm, huge pressure will be caused to ecological environment.In particular with shortage of water resources and dirt Water discharge standard it is stringent, it is many to build and proposed coal chemical industry enterprises be subject to water resource due to being limited, the sewage all to generation Propose " near-zero release " requirement；Some place integrated wastewater discharge standards are also to draining TDS（Total dissolved solid）It proposes Limit value causes some oil refining enterprise's needs to implement " near-zero release " processing to part high-salt sewage.
Saline sewage near-zero release at present mainly handles three monotechnicses by pretreatment, embrane method minimizing and dope It is combined what is realized.Existing preconditioning technique, which includes softening, coagulating sedimentation etc., can effectively remove hardness in waste water, colloid Substance and suspended solid particles etc., to COD and ammonia nitrogen almost without removal effect.Fluid bed light electrolysis+Fenton reactions, micro-filtration Although the technologies such as film fluid bed softening can remove the pollutants such as COD and ammonia nitrogen, often because processing cost is high, operation is complicated, It is not easy to be received by enterprise.Preferable processing is not achieved because of the high salt concentration not being resistant in sewage in conventional bioanalysis Effect.Either common filtration-reverse osmosis still using special membrane as the reverse osmosis membrane concentration technology of core, is belonged at physics Reason process is only separated by object and realizes that water quality changes, and cannot fundamentally cut down water pollutant, while desalination It is the process concentrated to pollutant.It is particularly stringent to entering organic matter of water content requirement as the equipment of core using film, be more than Certain density organic matter easily cause fouling membrane, equipment blocking, fluctuation of service, cleaning frequently, increase operating cost.Therefore, Organic matter therein and nitrogen-containing pollutant must be pre-processed before desalination, increase the service life of desalter.Meanwhile If untreated to COD, COD concentration increases in the carnallite generated after evaporative crystallization, the quality of carnallite is influenced, to the comprehensive of carnallite It closes processing and recycling brings difficulty, can not realize real near-zero release.Therefore how suitable technique to high-efficiency is used The COD in saline sewage is handled, is to ensure that subsequent film minimizing unit is capable of the premise of stable operation, only reduces as far as possible dense Pollutant concentration in contracting liquid can just make it possible that the carnallite finally generated realizes comprehensive utilization.
CN200810171744.4 discloses the method and purposes of a kind of high slat-containing wastewater processing or reuse, mainly uses What " pretreatment+high-efficiency aeration biological filter tank+advanced treating " group technology was realized, the U.S. is inoculated in high-efficiency aeration biological filter tank The Mixed cultures that company provides.Qualified discharge or reuse of the invention suitable for concentrate before membrane separation process film, are also applied for High slat-containing wastewater treatment for reuse and existing engineered upgrading.But this method needs the Mixed cultures for adding the U.S. just may be used To realize, using being subject to certain restrictions.
The content of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of integrated conduct methods of high slat-containing wastewater.The present invention is logical It crosses and realizes the efficient of the pollutants such as COD and total nitrogen using salt tolerant microbial inoculum and microbial growth promoters in membrane bioreactor Removal, can effectively reduce fouling membrane, increase the service life of film, ensure system stable operation.
The integrated conduct method of high slat-containing wastewater of the present invention, it is main to include with lower unit：
（1）Pretreatment：Salt tolerant microbial inoculum and growth promoter are added in existing membrane bioreactor, is contained in the salt tolerant microbial inoculum Secondary coccus FSTB-2, north are shown at least one of microbacterium FSTB-4, Pseudomonas stutzeri FSTB-5, simultaneously containing denitrogenation pair ball Bacterium (Paracoccus denitrificans) DN-3 and Methylobacterium (Methylobacterium phyllosphaerae) At least one of SDN-3；The growth promoter includes glycolipid, sugar alcohol and acylate；
（2）Coagulating sedimentation：Coagulating sedimentation is carried out using lime-soda ash softening method；
（3）Minimizing is handled：Minimizing processing is carried out to waste water after precipitation using reverse osmosis；
（4）Biochemical treatment：Step is added in existing biochemical treatment system（1）The salt tolerant microbial inoculum and growth promoter；
（5）Concentration：Concentration is carried out to strong brine using positive infiltration or vaporising device；
（6）Crystallization treatment：Crystallization treatment is carried out using mechanical centrifugal mode or multiple-effect evaporation mode, the carnallite finally generated carries out Integrated treatment or utilization.
In the present invention, step（1）Mainly by using membrane bioreactor and add specific salt tolerant microbial inoculum and growth rush The removal to organic pollution in high slat-containing wastewater is realized into agent.Existing membrane bioreactor such as can be aeration and biological Filter tank（BAF）, common membrane bioreactor（MBR）, moving bed membrane bioreactor（MBBR）Deng, it is preferred to use BAF.Film biology The operating condition of reactor is：Temperature is 20-40 DEG C, pH 7-9, dissolved oxygen concentration 0.5-1.5mg/L.
In the present invention, step（1）In used salt tolerant microbial inoculum, microbacterium FSTB-4, Amur are seen in secondary coccus FSTB-2, north Pseudomonad FSTB-5 was preserved in " China Committee for Culture Collection of Microorganisms's common micro-organisms on June 1st, 2015 " center ", deposit number are respectively CGMCC No.10938, CGMCC No.10939, CGMCC No.10940, preservation address：North No. 3 Institute of Microorganism, Academia Sinica of institute of Jing Shi Chaoyang Districts North Star West Road 1.Wherein pair coccus FSTB-2 exists Disclosure is applied in CN201510737219.4, and has had submitted preservation and survival to prove；North sees that microbacterium FSTB-4 exists Disclosure is applied in CN201510737150.5, and has had submitted preservation and survival to prove；Pseudomonas stutzeri FSTB-5 exists Disclosure is applied in CN201510737176.X, and has had submitted preservation and survival to prove.Paracoccus denitrificans DN-3, Methylobacterium The deposit number of SDN-3 is respectively CGMCC No.3658 and CGMCC No.3660, in CN102465104A, Disclosed in CN102465103.
In salt tolerant microbial inoculum of the present invention, " secondary coccus FSTB-2, north are shown in microbacterium FSTB-4, Pseudomonas stutzeri FSTB-5 At least one ", " at least one of Paracoccus denitrificans DN-3 and Methylobacterium SDN-3 ", the volume ratio of two bacteroids is 1: 1-5.（By thalline stereometer, thalline volume is centrifuges under the conditions of 10,000 turns per minute obtaining after five minutes after culture Thalline volume, similarly hereinafter）.Paracoccus denitrificans DN-3 and Methylobacterium SDN-3 can be therein a kind of or two kinds arbitrary The mixing thalline of ratio.It is preferred that simultaneously containing secondary coccus FSTB-2, Pseudomonas stutzeri FSTB-5.More preferably contain denitrogenation simultaneously Microbacterium FSTB-4 and Pseudomonas stutzeri FSTB-5 five are seen in secondary coccus DN-3, Methylobacterium SDN-3, secondary coccus FSTB-2, north Strain bacterium.Match somebody with somebody with specific reference to the requirements such as the stability selection salt tolerant microbial inoculum of influent quality, effluent index requirement, whole set process device Side.
In salt tolerant microbial inoculum of the present invention, secondary coccus FSTB-2 colony colours are ecru, and bacterial strain individual is spherical, gram dye Color is feminine gender, and oxidase positive, catalase is negative, and decomposable asymmetric choice net utilizes several kinds of carbon source, has nitrate reduction activity.Microbot is seen in north Bacterium FSTB-4 colony colours are shallower taupe brown, and bacterial strain is individual for rod-shaped, Gram-positive, oxidase negative, catalase sun Property, decomposable asymmetric choice net utilizes several kinds of carbon source, has nitrate reduction characteristic.Pseudomonas stutzeri FSTB-5 colony colours are shallow turmeric Color, bacterial strain individual are rod-shaped, Gram-negative, and oxidase negative contacts enzyme positive, has nitrate reduction performance, decomposable asymmetric choice net Utilize several kinds of carbon source.The pair coccus FSTB-2, north see that microbacterium FSTB-4 and Pseudomonas stutzeri FSTB-5 can be independent Applied to the efficient removal of COD and total nitrogen in the brine waste of salt content 10000-50000mg/L.
In salt tolerant microbial inoculum of the present invention, microbacterium FSTB-4 and Pseudomonas stutzeri FSTB-5 tri- are seen in secondary coccus FSTB-2, north The seed liquor of kind bacterium is amplified culture after can individually amplifying culture or the seed liquor mixing of three kinds of bacterium.Denitrogenation pair The seed liquor of coccus DN-3 and Methylobacterium SDN-3 can individually amplify culture or the seed liquor mixing of two kinds of bacterium is common With amplification culture.
In the present invention, step（1）The dosage of the salt tolerant microbial inoculum according to handled wastewater volume per hour 0.1%- 1.0%, preferably 0.05%-0.5% is added.In the present invention, step（1）In the growth promoter, in parts by weight, glycolipid Content is 0.5-15 parts by weight, preferably 2-10 parts by weight；Content of sugar alcohol is 0.5-15 parts by weight, preferably 2-10 parts by weight；It is organic Hydrochlorate is 5-30 parts by weight, is preferably 10-20 parts by weight.The glycolipid is in seaweed glycolipid, sophorolipid and rhamnolipid etc. At least one, preferably lactone type sophorolipid；Sugar alcohol be selected from mannitol, xylitol, lactitol, ribitol, galactitol, inositol and One or more of erythrite etc., preferably lactitol；Acylate is one in sodium acetate, sodium succinate and sodium citrate etc. Kind is several, preferably sodium acetate.
In the present invention, step（1）The dosage of the salt tolerant microbial inoculum according to handled wastewater volume per hour 0.1%- 1.0%, preferably 0.05%-0.5% is added.The dosage of the growth promoter is dense according to accelerating agent in sewage disposal system 0.01-10mg/L is spent, preferably 0.1-1.0mg/L is added.Specifically can according to water quality and handle water outlet index request into Row adjustment.
In the present invention, step（2）Coagulating sedimentation be mainly metal ions, the colloid substances such as calcium and magnesium removed in brine waste Matter and solid suspended particle and microorganism.Organic Pollutants in Wastewater handled by unit requirement is more low better, having in waste water The presence of machine object can influence coagulating sedimentation effect, influence the removal of hardness.Waste water is controlled in the residence time of coagulating sedimentation unit For 10-60min, pH 9-12.
In the present invention, step（3）Minimizing processing the light membrane reverse osmosis system in sea or extraordinary membrane reverse osmosis may be employed System, preferably special membrane counter-infiltration system.The purpose of minimizing is to be lowered into the sewage quantity of subsequent cell as far as possible, is reduced into This.The operating pressure of reverse osmosis units is 2-10MPa, and saline sewage realizes 5-10 times of concentration, and reverse-osmosis treated obtains pure Water enters the utilization of reuse water tank, and concentrated water enters step（4）Processing.
In the present invention, step（4）It is to add step in existing biochemical treatment system（1）The salt tolerant microbial inoculum and growth promote Into agent, so as to improve the treatment effect of biochemical treatment unit, dosage is step（1）1-5 times.
In the present invention, step（5）It is preferred that being handled using positive infiltration, the operation temperature of liquid recovery unit is drawn in positive process of osmosis It spends for 60-110 DEG C.The production water of positive permeation unit can be utilized directly, and the TDS of generation enters next unit up to 25% concentrated water Carry out crystallization treatment.
In the present invention, step（6）Crystallization treatment preferably using multiple-effect evaporation crystallization mode obtain crystal salt, preferred dual action Crystallization, at 70-110 DEG C, the temperature of two effect evaporations is controlled at 50-100 DEG C for the temperature control of an effect evaporation.
In the present invention, the high slat-containing wastewater refers to that salt content is more than the waste water of 5000mg/L, wherein COD（Cr methods, under Together）Concentration is 100-300mg/L, total nitrogen concentration 15-150mg/L.
The present invention by respectively setting a biochemical treatment unit before and after the processing in minimizing, and by adding specific salt tolerant microbial inoculum With the COD and total nitrogen in growth promoter treated sewage, the unit to the stable operation of entire saline sewage Zero discharging system all Guaranteeing role can be played.Salt tolerant microbial inoculum and growth promoter are added in pretreatment membrane bioreactor, can be realized with high salt Under the conditions of hardly degraded organic substance and total nitrogen efficient removal, ensure Biological Pretreatment unit stable operation.Meanwhile the micro- life of salt tolerant Object can utilize the calcium ions and magnesium ions in sewage, on the one hand can improve the filter effect of membrane bioreactor；On the other hand can drop The hardness of low sewage reduces the hard pharmaceutical use of follow-up deliming；The removal of nitrate can also improve the quality of carnallite.
The method of the present invention can ensure the stability of subsequent film system operation, reduce fouling membrane, improve the service life of film, And then the maintenance cost of operating cost and system is reduced, while the intractability of carnallite sub-prime can be reduced, really realize saliferous The zero discharge treatment of sewage.
Description of the drawings
Fig. 1 is a kind of flow diagram of high slat-containing wastewater processing of the present invention；
Wherein, 1- biological aerated filter, 2- coagulating sedimentation units, 3- minimizing units, 4- biochemical treatment units, at 5- just infiltrations Manage unit, 6- crystallization treatment units.
Specific embodiment
Below in conjunction with the accompanying drawings 1 and embodiment the specific embodiment and effect of the present invention are illustrated, but therefore do not make Into limiting the scope of the invention.
Using attached process flow shown in FIG. 1, high slat-containing wastewater is initially entered in biological aerated filter 1, in aeration and biological Salt tolerant microbial inoculum and growth promoter are added simultaneously in filter tank, COD concentration is reduced to below 60mg/L, total in pretreated water outlet Nitrogen concentration is reduced to below 15mg/L, and water outlet enters in coagulating sedimentation unit 2, using lime-soda ash softening method, by processing After can use the water hardness+basicity≤100mg/L, turbidity≤5NTU, SS≤10mg/L, silica≤50mg/L.By coagulation Waste water after precipitation enters in minimizing unit 3, and saline sewage realizes 5-10 times of concentration, and concentrated water TDS reaches ten thousand mg/L of 5-10, COD concentration reaches 50-100mg/L up to 200-500mg/L, total nitrogen concentration.The concentrated water goes successively to biochemical treatment unit 4 and carries out COD With the removal of total nitrogen, step is added（1）The salt tolerant microbial inoculum and growth promoter.Subsequently into follow-up positive infiltration processing unit Carry out concentration again in 5, the TDS in concentrated water can reach ten thousand mg/L of 15-25, concentrated water enter crystallization treatment unit 6 realize it is miscellaneous Salt recycles, so as to fulfill the zero-emission of waste water.
Growth promoter used in the embodiment of the present invention is prepared according to the ratio and formula of table 1.The promoter concentration is 0.5g/L。
The formula and ratio of 1 growth promoter of table
Salt tolerant microbial inoculum used in the present invention is prepared using CN201510737425.5 the methods, and secondary coccus FSTB-2, north are seen FSTB Liquid Culture based formulas used in microbacterium FSTB-4 and Pseudomonas stutzeri FSTB-5 is：FeSO4•7H2O 25mg/L, NH4NO3286mg/L, KCl 929mg/L, CaCl22769mg/L, NaCl 21008mg/L, beef extract 5g/L, peptone 10g/ L, pH value 6.0-8.0；FSTB solid mediums are the agar of addition 2% in liquid medium.The liquid of Paracoccus denitrificans DN-3 Body culture medium prescription is：KNO3:1g/L, sodium succinate:8g/L, KH2PO4:1g/L, FeCL2:0.5g/L；Solid medium adds in The agar of 20g/L.The Liquid Culture based formulas of Methylobacterium SDN-3 is：Ammonium sulfate:0.5g/L, methanol:0.75mL/L, KH2PO4:1g/L, FeCL2:0.5g/L；Solid medium adds in 2% agar.Specifically follow the steps below：
（1）Secondary coccus FSTB-2, north are seen that microbacterium FSTB-4 and Pseudomonas stutzeri FSTB-5 are inoculated in FSTB solids respectively It is activated on culture medium；Paracoccus denitrificans DN-3 and Methylobacterium SDN-3 is inoculated on corresponding solid medium and carries out respectively Activation；Temperature is placed on after coating uniformly to be activated in 35 DEG C of constant incubators.
（2）See microbacterium FSTB-4 and Pseudomonas stutzeri FSTB- with make even secondary coccus FSTB-2 on plate, north of collarium is connect 5 bacterium colonies are inoculated in respectively in corresponding FSTB fluid nutrient mediums, with Paracoccus denitrificans DN-3 and the methyl for connecing collarium and making even on plate Bacillus SDN-3 bacterium colonies are inoculated in respectively in corresponding fluid nutrient medium, and shake culture 48 is small under the conditions of 30 DEG C of temperature, 150rpm Up to exponential phase, liquid bacterial agent seed liquor is obtained.
（3）Microbacterium is shown in secondary coccus FSTB-2, north respectively in the reactor with good aeration and stirring condition FSTB-4, Pseudomonas stutzeri FSTB-5, Paracoccus denitrificans DN-3 and Methylobacterium SDN-3 seed liquors are amplified culture, training In nutrient solution COD concentration be 2000mg/L, total nitrogen concentration 100mg/L, salt content 2.5wt%, pH value 8.0.Condition of culture is equal For：Temperature is 30 DEG C, dissolved oxygen 2.0-3.0mg/L, when incubation time 72 is small, is derived from the dense bacterium solution of five plants of bacterium.
Above-mentioned dense bacterium solution is collected, is prepared according to the ratio described in table 2, concrete composition and with such as 2 institute of table Show.
The composition and ratio of 2 salt tolerant microbial inoculum of table
Embodiment 1
Certain high slat-containing wastewater is handled using the method for the present invention, waste water quality is：COD concentration be 100-150 mg/L, total nitrogen concentration For 40-60mg/L, TDS 5500mg/L.
Sewage is initially entered in biological aerated filter, and operating condition is：Temperature is 27 DEG C, pH 7.5, and dissolved oxygen concentration is 1.0mg/L left and right.0.5% according to handled wastewater volume per hour in biological aerated filter adds salt tolerant microbial inoculum 1#, simultaneously Growth promoter A is added according to promoter concentration 0.5mg/L in sewage disposal system, COD concentration drops in pretreated water outlet Below 10mg/L is reduced to down to below 40mg/L, total nitrogen concentration.Effluent of aeration biological filter enters in coagulating sedimentation unit, adopts With lime-soda ash softening method, residence time 30min, pH are controlled in 9-10, can use the water hardness+basicity after treatment ≤ 100mg/L, turbidity≤5NTU, SS≤10mg/L, silica≤50mg/L.Waste water after coagulating sedimentation enters decrement To change in unit, operating pressure 5MPa, saline sewage realizes 9 times of concentration, and concentrated water TDS reaches 50,000 mg/L, while in dope COD concentration reaches 60-70mg/L up to 200-300mg/L, total nitrogen concentration.The concentrated water continue through biochemical treatment unit carry out COD and The removal of total nitrogen adds salt tolerant microbial inoculum 1# according to the 1% of handled wastewater volume per hour, while according in sewage disposal system Promoter concentration 1.0mg/L adds growth promoter A, and COD and nitrogen removal rate are up to more than 90% after treatment.Then into Enter in follow-up positive infiltration processing unit and carry out concentration again, the operation temperature that liquid recovery unit is drawn in positive process of osmosis is 90-100 DEG C, the TDS in concentrated water reaches 220,000 mg/L, and concentrated water enters crystallization treatment unit, and an effect evaporating temperature control is in 70- 100 DEG C, two effect evaporating temperature controls are at 50-80 DEG C, the final zero-emission for realizing saline sewage.After device is run one month, medicine The unit producing water ratio of agent cost reduction 4%, minimizing unit and positive infiltration processing unit does not substantially change, device fortune Row is stablized, and the membrane flux of two units does not change substantially.It can be seen that it is removed using the method for the present invention in saline sewage COD and total nitrogen after, processing cost can be substantially reduced, improve device operation stability, extend the service life of film.
Embodiment 2
The processing waste water identical with embodiment 1, the operating condition of biological aerated filter is with embodiment 1, except that being aerated 0.3% salt tolerant microbial inoculum 2# is added according to handled wastewater volume per hour in biofilter, while according in sewage disposal system Promoter concentration 0.5mg/L adds growth promoter B, and it is dense to be down to below 40mg/L, total nitrogen for COD concentration in pretreated water outlet Degree is reduced to below 10mg/L.Effluent of aeration biological filter enters in coagulating sedimentation unit, using lime-soda ash softening method, Residence time is 30min, pH controls in 9-10, can use after treatment the water hardness+basicity≤100mg/L, turbidity≤5NTU, SS≤10mg/L, silica≤50mg/L.Waste water after coagulating sedimentation enters in minimizing unit, and operating pressure is 5MPa, saline sewage realize 9 times of concentration, and concentrated water TDS reaches 50,000 mg/L, while the COD concentration in dope reaches 200-300mg/ L or so, total nitrogen concentration reach 60-70mg/L.The concentrated water continues through the removal that biochemical treatment unit carries out COD and total nitrogen, according to The 0.5% of handled wastewater volume adds salt tolerant microbial inoculum 2# per hour, while according to promoter concentration in sewage disposal system 1.0mg/L adds growth promoter B, and COD and nitrogen removal rate are up to more than 90% after treatment.Subsequently into subsequently just Concentration again is carried out in infiltration processing unit, the operation temperature that liquid recovery unit is drawn in positive process of osmosis is 90-100 DEG C, the TDS in concentrated water can reach 220,000 mg/L, and concentrated water enters crystallization treatment unit, and the effect evaporating temperature control is in 70- 100 DEG C, two effect evaporating temperature controls are at 50-80 DEG C, the final near-zero release for realizing saline sewage.After device is run one month, Reagent cost reduces 7%, and minimizing unit and the positive unit producing water ratio for permeating processing unit do not change substantially, device Stable, the flux of two unit membranes does not change substantially.It can be seen that saline sewage is removed using the method for the present invention In COD and total nitrogen after, processing cost can be substantially reduced, improve device operation stability, extend the service life of film.
Embodiment 3
Certain high slat-containing wastewater is handled using the method for the present invention, waste water quality is：COD concentration is 160-250mg/L, and total nitrogen concentration is 50-100mg/L, TDS 9000mg/L.
Sewage is initially entered in biological aerated filter, and operating condition is：Temperature is 35 DEG C, pH 8.2, and dissolved oxygen concentration is 1.5mg/L.0.5% according to handled wastewater volume per hour in biological aerated filter adds salt tolerant microbial inoculum 3#, while according to Promoter concentration 0.5mg/L adds growth promoter C in sewage disposal system, and COD concentration is reduced in pretreated water outlet Below 50mg/L, total nitrogen concentration are reduced to below 15mg/L.Effluent of aeration biological filter enters in coagulating sedimentation unit, using stone Ash-soda ash softening method, residence time 50min, pH control in 10-11, can use after treatment the water hardness+basicity≤ 100mg/L, turbidity≤5NTU, SS≤10mg/L, silica≤50mg/L.Waste water after coagulating sedimentation enters minimizing In unit, operating pressure 10MPa, saline sewage realizes 7 times of concentration, and concentrated water TDS reaches 60,000 mg/L, while in dope COD concentration reaches 70-80mg/L up to 450-500mg/L or so, total nitrogen concentration.The concentrated water continues through the progress of biochemical treatment unit The removal of COD and total nitrogen, biochemical unit is interior to add salt tolerant microbial inoculum 3# according to the 1.0% of handled wastewater volume per hour, presses simultaneously Growth promoter C is added according to promoter concentration 1.5mg/L in sewage disposal system, COD and nitrogen removal rate are equal after treatment Up to more than 90%.Subsequently into concentration again is carried out in follow-up positive infiltration processing unit, liquid is drawn in positive process of osmosis and is returned The operation temperature of unit is received as 100-110 DEG C, the TDS in concentrated water can reach 250,000 mg/L, and concentrated water enters crystallization treatment unit, and one Evaporating temperature control is imitated at 100-110 DEG C, two effect evaporating temperature controls are at 90-100 DEG C, the final nearly zero-emission for realizing saline sewage It puts.After device is run one month, reagent cost reduces 10%, minimizing unit and just the unit producing water ratio of infiltration processing unit Substantially do not change, device is stable, and the flux of two unit membranes does not change substantially.It can be seen that using After COD in the method for the present invention removal saline sewage, processing cost can be substantially reduced, device operation stability is improved, extends Film service life.
Comparative example 1
With embodiment 1, difference is for treatment process and operating condition：Salt tolerant microbial inoculum 1# is only added in biological aerated filter, no Add growth promoter A.COD concentration is reduced to 50mg/L, total nitrogen concentration 25-30mg/L in pretreated water outlet.By Concentrated water COD concentration reaches 150-180mg/L up to 400mg/L, total nitrogen concentration after minimizing cell processing.The concentrated water continues through biochemistry Processing unit carries out the removal of COD and total nitrogen, and for COD removal rates up to 70% or so, nitrogen removal rate only has 60% or so.Device is transported After row one month, the unit producing water ratio of minimizing unit and positive permeation unit reduces by 15% and 12% respectively, two unit membranes it is clear Water flux reduces by 12% and 10% respectively.
Comparative example 2
With embodiment 1, difference is for treatment process and operating condition：：Salt tolerant microbial inoculum 1# is not added in biological aerated filter, only Add growth promoter A.COD concentration is reduced to 70mg/L in pretreated water outlet, total nitrogen concentration decreases below 20mg/L. Concentrated water COD is up to 100-150mg/L at concentrations up to 600mg/L, total nitrogen concentration after minimizing cell processing, which continues The removal of COD and total nitrogen is carried out by biochemical treatment unit, COD removal rates only have 70% or so, and nitrogen removal rate only has 80% left side It is right.After device is run one month, the unit producing water ratio of minimizing unit and positive infiltration processing unit reduces by 10% and 8% respectively, and two The clear water flux of a unit membrane reduces by 10% and 5% respectively.

Claims (13)

1. a kind of integrated conduct method of high slat-containing wastewater, it is characterised in that comprise the following steps：
（1）Pretreatment：Salt tolerant microbial inoculum and growth promoter are added in existing membrane bioreactor, is contained in the salt tolerant microbial inoculum Secondary coccus FSTB-2, north are shown at least one of microbacterium FSTB-4, Pseudomonas stutzeri FSTB-5, simultaneously containing denitrogenation pair ball At least one of bacterium DN-3 and Methylobacterium SDN-3；Microbacterium FSTB-4, Pseudomonas stutzeri are seen in secondary coccus FSTB-2, north The deposit number of FSTB-5 is respectively CGMCC No.10938, CGMCC No.10939, CGMCC No.10940；Paracoccus denitrificans DN-3, the deposit number of Methylobacterium SDN-3 are respectively CGMCC No.3658, CGMCC No.3660；The growth promoter Including glycolipid, sugar alcohol and acylate；
（2）Coagulating sedimentation：Coagulating sedimentation is carried out using lime-soda ash softening method；
（3）Minimizing is handled：Minimizing processing is carried out to waste water after precipitation using reverse osmosis；
（4）Biochemical treatment：Step is added in existing biochemical treatment system（1）The salt tolerant microbial inoculum and growth promoter；
（5）Concentration：Concentration is carried out to strong brine using positive infiltration or vaporising device；
（6）Crystallization treatment：Crystallization treatment is carried out using mechanical centrifugal or multiple-effect evaporation mode, the carnallite finally generated is integrated Processing utilizes.
2. according to the method described in claim 1, it is characterized in that：Step（1）The membrane bioreactor of use be BAF, MBR or MBBR, the operating condition of membrane bioreactor are：Temperature is 20-40 DEG C, pH 7-9, dissolved oxygen concentration 0.5-1.5mg/L.
3. according to the method described in claim 1, it is characterized in that：Step（1）In used salt tolerant microbial inoculum, " secondary coccus FSTB-2, north are shown at least one of microbacterium FSTB-4, Pseudomonas stutzeri FSTB-5 " and " Paracoccus denitrificans DN-3 and first At least one of base shaft bacterium SDN-3 ", the volume ratio of two bacteroids is 1:1-5.
4. according to the method described in claim 3, it is characterized in that：In salt tolerant microbial inoculum, microbacterium is seen in secondary coccus FSTB-2, north After the seed liquor of tri- kinds of bacterium of FSTB-4 and Pseudomonas stutzeri FSTB-5 individually amplifies culture or the seed liquor mixing of three kinds of bacterium It is amplified culture；The seed liquor of Paracoccus denitrificans DN-3 and Methylobacterium SDN-3 individually amplify culture or two kinds of bacterium The common amplification culture of seed liquor mixing.
5. according to the method described in claim 1, it is characterized in that：Step（1）In the growth promoter, in parts by weight, Glycolipid content is 0.5-15 parts by weight, and content of sugar alcohol is 0.5-15 parts by weight, and acylate is 5-30 parts by weight.
6. method according to claim 1 or 5, it is characterised in that：Step（1）The glycolipid is seaweed glycolipid, sophorolipid At least one of with rhamnolipid；Sugar alcohol is selected from mannitol, xylitol, lactitol, ribitol, galactitol, inositol and red One or more of moss alcohol etc.；Acylate is one or more of sodium acetate, sodium succinate and sodium citrate etc..
7. according to the method described in claim 1, it is characterized in that：Step（1）The dosage of the salt tolerant microbial inoculum is according to every small When handled wastewater volume 0.1%-1.0% added；The dosage of the growth promoter is according in sewage disposal system Promoter concentration 0.01-10mg/L is added.
8. according to the method described in claim 1, it is characterized in that：Step（2）Coagulating sedimentation mainly remove brine waste In calcium and magnesium metal ion, colloidal substance and solid suspended particle and microorganism, control waste water coagulating sedimentation unit stop Time is 10-60min, pH 9-12.
9. according to the method described in claim 1, it is characterized in that：Step（3）Minimizing processing using the light membrane reverse osmosis in sea System or special membrane counter-infiltration system, the operating pressures of reverse osmosis units are 2-10MPa, and saline sewage realizes 5-10 times dense Contracting.
10. according to the method described in claim 1, it is characterized in that：Step（4）It is that step is added in existing biochemical treatment system Suddenly（1）Salt tolerant microbial inoculum, dosage is step（1）1-5 times.
11. according to the method described in claim 1, it is characterized in that：Step（5）It is handled using positive infiltration, in positive process of osmosis The operation temperature for drawing liquid recovery unit is 60-110 DEG C.
12. according to the method described in claim 1, it is characterized in that：Step（6）Crystallization treatment using double-effect evaporation crystallize, At 70-110 DEG C, the temperature of two effect evaporations is controlled at 50-100 DEG C for the temperature control of one effect evaporation.
13. according to the method described in claim 1, it is characterized in that：The high slat-containing wastewater refers to that salt content is more than 5000mg/ The waste water of L, wherein COD concentration are 100-300mg/L, total nitrogen concentration 15-150mg/L.
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