CN104230039B - A kind of city permitted discharge advanced treatment and reclamation method - Google Patents
A kind of city permitted discharge advanced treatment and reclamation method Download PDFInfo
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- CN104230039B CN104230039B CN201310233588.0A CN201310233588A CN104230039B CN 104230039 B CN104230039 B CN 104230039B CN 201310233588 A CN201310233588 A CN 201310233588A CN 104230039 B CN104230039 B CN 104230039B
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Abstract
The present invention open a kind of city permitted discharge advanced treatment and reclamation method, uses " simple pretreatment immersion ultra filtering reverse osmosis " group technology, municipal sewage up to standard is carried out advanced treating.It is not adapt to high COD water quality, pretreatment process complexity, ultra filtering reverse osmosis technological process are arranged multiple intermediate water tank, filtration etc. of ensuring public security for what existing pair of film device existed, and need to add a large amount of flocculant, antibacterial, reducing agent etc. and reduce suspension content and control microorganism to shortcomings such as the pollutions of membranous system, carry out innovation and improve.The present invention can be greatly simplified technological process, improve cycle of operation, reduction operating cost, improve the utilization rate of city standard discharge sewage, reduce wastewater discharge to greatest extent, there is the advantages such as treatment effeciency height, cycle of operation length, the water resource response rate are high, investment operating cost is low.
Description
Technical field
The present invention relates to a kind of city standard discharge advanced treatment of wastewater and the method for reuse, more
Say body, relate to a kind of using membrane technology to carry out city permitted discharge advanced treating and the side of reuse
Method.Belong to the further treatment technique field of municipal sewage.
Background technology
Water is that people live and indispensable valuable source in the development of the national economy, is to replace
The material in generation.Along with expanding economy, the growth of population and people's material and cultural life
Improving, all over the world to the demand of water growing, shortage of water resources has become many countries
Outstanding problem.
Municipal wastewater is city and organic town enters the general designation of water of sewerage system, including raw
Sewage alive, production waste water and the rainwater dammed in combined drainage system.The amount of municipal wastewater
Generally large, up to more than every day ton.Commonly reach country-level or two grades after treatment
Discharge standard, enters river course or ocean.Municipal sewage is short for alleviating hydropenia city water resource,
Reduce urban water resource and pollute significant.
In order to solve the problem of industry water resource short water supply, the regeneration of water and reuse, Jiang Zhongshui
Exploitation is the most increasingly subject to people's attention for second water source.For hydropenia city, city
Recycling sewage generated by making more even more important than mining new source of water, more meet the objective thing of China's poor-water
Real, have more the meaning of reality.Using the middle water after municipal sewage two stage treatment as former water, root
Carrying out advanced treating according to needs, supply commercial production, urban afforestation, municipal water use etc. are to solve
The most effective approach of shortage of water resources, is the imperative very important decision in hydropenia city.Such one
Aspect supplements the shortage of water resource, on the other hand decreases the consumption of city tap-water.
Meanwhile, municipal sewage is back to industry, agricultural etc. after treatment, and the row of decreasing is to the dirt in waters
The water yield, creates considerable environmental benefit, and this environmental benefit is unified with economic benefit
's；Eliminate water resources taxes, and the fetch water energy consumption with long-distance sand transport water and construction cost,
Just can be less than with Natural Water with the cost that middle water is former water in-depth further process is former water
Waterworks.Therefore, sewage recycling i.e. Treated sewage reusing, both can prevent pollution of harnessing the river, protection
Water environment, is also to solve the important channel that city water resource is not enough.
Within 2010, National urban displacement is up to 600 × 108m3, the dirt of whole nation the planned city
The equal handling rate of level is not less than 50%, key cities' wastewater reusing treatment rate 70%.This just gives
Reusing sewage creates primary condition.If whole nation reusing sewage rate averagely reaches 20%, year
Reuse amount is up to 40 × 108m3, it is normal year in time hydropenia 60 × 108m367%, the most logical
Cross reusing sewage, the more than half part of National urban water deficit, reuse scale and reuse potentiality can be solved
Big, can be to alleviate the water supply pressure in large quantities of hydropenia cities.
Recycling municipal sewage at present, major part is in landscape water as Treated sewage reusing, or industry is cold
But recirculated water.In a lot of areas, due to salinity height or Organic substance, suspension content height in sewage,
Permitted discharge through simple Treatment for Reuse still cannot meet reuse water quality (as circulating cooling make-up water,
Boiler replenishing water) requirement.Now need permitted discharge is carried out further advanced treating.At sewage
Further treatment technique in, membrane separation technique is presently the most economically viable method.
Double membrane technologies are by ultrafiltration/microfiltration (UF/MF) technology and reverse osmosis (RO) technology
The technique being combined together.Owing to reverse osmosis membrane requires the highest (usually requiring that to influent quality
Pollution index SDI≤5), the most contaminated blocking and reduce that even to lose it high-precision
Filtering function, and the product water water quality of ultrafiltration/microfiltration filtration system can meet reverse osmosis system completely
The system requirement to influent quality.Therefore, ultrafiltration/microfiltration systems is set before counter-infiltration system,
Pollution and the blocking of reverse osmosis membrane can be effectively prevented, extend the use longevity of reverse osmosis membrane
Life.At present bi-membrane method water technology can be widely applied to chemical industry, electric power, electronics, pharmacy,
Prepared by pure water and the ultra-pure water in the fields such as petrochemical industry, weaving, food, and desalinization, bitter salty
Water desalination and special separation process, particularly in terms of sewage recycling regeneration.Bi-membrane method
Can directly utilize the bio-chemical effluent of enterprise as former water, the water of boiler water-filling after process, can be reached
Matter requirement, for enterprise's saving water resource.
Chinese invention patent CN1796314A proposes a kind of employing and includes coagulation and filtration, ozone
Oxidation, biological oxidation at interior advanced treatment process, main remove difficulty remove micro-content organism,
Antibacterial, virus etc. are to reach reuse purpose, and technique is also possible that nanofiltration and reverse osmosis process enter
Row processes further.This technique is not provided with ultrafiltration before nanofiltration and reverse osmosis, for poor water
Matter is it is difficult to ensure that nanofiltration and the stable operation of reverse osmosis.
Chinese invention patent CN101209886A propose a kind of use membrane bioreactor with
Advanced treatment recycling technique of urban sewage associated with reverse osmosis.It is former water with city secondary effluent,
Enter membrane bioreactor MBR system and carry out Biological Pretreatment to remove BOD therein.Should
Technique needs secondary effluent is carried out further biochemistry, and operating cost is of a relatively high, and ultrafiltration runs
Flux is on the low side.
Chinese invention patent CN101544448A proposes a kind of employing moving bed biological reaction
Device-coagulating sedimentation-air supporting-multi-medium filtering-filtration-reverse osmosis technique, reuse water quality can reach to be followed
Ring water and the requirement of boiler of power plant make-up water.This technique pretreatment process is longer, and processing cost is relatively
High.
Chinese utility model patent CN201538718U proposes a kind of municipal wastewater and uses " throwing
Adding of germicide-dosing coagulant-multi-medium filtering-heat exchange-self-cleaning filtering-ultrafiltration-intermediate water tank
(acid adding/non oxidizing bactericide)-add reducing agent/antisludging agent-security personnel's filtration-reverse osmosis "
Degree of depth reclaiming system, water purification after treatment is as the supplementary water of cold rolling Enterprises water or desalination
The moisturizing of water station.
Chinese utility model patent CN201309866Y propose a kind of employing " video disc filters-
Ultrafiltration apparatus-intermediate water tank-security personnel's filtration-reverse osmosis " the waste water recycling processing means of technique, adopt
Effluent quality after processing with said apparatus reaches industry water standard requirement, thus realizes producing
Reuse.
Above-mentioned utility model patent and patent of invention, though all from combining different preprocess methods,
The method using ultrafiltration and reverse osmosis combination has carried out the advanced treating of city permitted discharge and has returned
With, but from the point of view of the situation of the industrial membrane plant running involved by above-mentioned patent, be primarily present as
Lower technical problem: the most existing industry ultrafiltration membrane system is to raw water quality (COD/ float/hard
Degree etc.) requirement higher, usual petroleum chemical enterprise permitted discharge water quality cannot meet into film requirement,
Need to carry out pretreatment before a series of film, thereby increase fixed investment and operating cost；②
Conventional reverse osmosis system has strict demand (less than 100mg/L) to influent COD, the most existing
Dual membrane system can only process bio-chemical effluent and the relatively low waste water system of COD value；The most existing
Dual membrane system needs to arrange intermediate water tank and cartridge filter, easily cause microbial growth and
The Severe blockage of cartridge filter so that cartridge filter need to often be changed；The most existing industry
Film device all uses and adds NaClO sterilization continuously, needs to add before entering reverse osmosis after sterilization
The NaHSO of amount3Reduce to prevent the excess chlorine residue destruction to reverse osmosis membrane, so since both increased
Having added reagent cost, there is destructive risk in the operation for reverse osmosis membrane again.Employing ultraviolet is killed
Bacterium method replaces original dosing sterilization, and not only sterilizing rate is high, and can effectively reduce reagent cost,
Secondary pollution will not be brought；5. counter-infiltration system needs to shut down clearly after running and reaching the cleaning frequency
Wash, it is impossible to realize dispersion and wash, and reverse osmosis membrane system series component is more, cause back segment anti-
The crossflow velocity of infiltration is on the low side and seriously polluted.
Summary of the invention
The invention discloses a kind of city permitted discharge advanced treatment and reclamation method, it is intended to for
The defect of prior art during commercial Application, it is provided that a kind of employing " simple pretreatment-submergence
Formula filtration-reverse osmosis " COMBINED PROCESS carries out advanced treating and reuse to municipal sewage up to standard
Method.Main purpose be for the existing pair of film device exist do not adapt to high COD water quality,
Pretreatment process complexity, ultra filtering reverse osmosis technological process arrange multiple intermediate water tank, ensured public security
Filter etc., and need to add a large amount of flocculant, antibacterial, reducing agent etc. reduce suspension content and
Control microorganism and the shortcomings such as the pollution of membranous system are carried out technological innovation and improvement.
The present invention adopts the following technical scheme that realization:
The main water quality characteristic of city of the present invention standard discharge sewage is: pH be 7.3～
8.2, colourity 10～30 times, conductance 2500～2800 μ s/cm, COD100～130mg/L,
TOC33～47mg/L, with calcium carbonate hardness 410～480mg/L, with calcium carbonate methyl
Orange base degree 600～800mg/L, Cl-200～300mg/L, NH4 +-N30～60mg/L, SO4 2-
250～350mg/L, content of microorganisms 7 × 104～4 × 105Cfu/ml, total ferrum 0.1～
0.3mg/L。
The advanced treatment and reclamation method of a kind of city permitted discharge warp includes following step:
(1) the city standard discharge sewage that carries by the road, uses pipeline dosing and mixes
Mode, carries out pH regulator to feedwater；
(2) by the standard discharge sewage after pH adjusted in step (1), it is delivered to bottom
Have micro-pore aeration, top has the air supporting sedimentation tank of cutoff board；
(3) mode of overflow is used, by the air supporting water outlet in step (2), through pipeline pump,
Submerged ultrafiltration unit is entered after being delivered to sterilizer；
(4) use self priming pump, water is produced in the ultrafiltration of step (3), after sterilizer processes,
Reverse osmosis membrane unit can be delivered to by high-pressure pump；
(5) mode of part dense water circulation is used, by a certain amount of reverse osmosis concentrated water, through increasing
After pressure, high pressure delivery side of pump can be entered through pipeline force (forcing) pump supercharging, with the water outlet of step (4)
Mixing, enters reverse osmosis membrane unit, and this process uses the mode of dense water circulation to improve reverse osmosis system
The crossflow velocity of system, to reduce fouling membrane；
(6) by the reverse osmosis produced water in step (5), through pipeline pump, it is delivered to use water spot,
Such as the boiler feed water system of refinery device, outer row's reverse osmosis concentrated water and remaining standard discharge city
Discharge after sewage mixing.
The technical characteristics of the present invention includes herein below:
PH regulator in step (1) be pH6.0～7.5, preferably pH be 6.5～7.0.
For regulating the acid of standard discharge sewage pH in step (1), sulphuric acid, salt can be used
Strong acid and the middle strong acid such as acid, oxalic acid, the concentration of the most all kinds of acid is unrestricted.
In step (2), air supporting sedimentation tank lower end has funnelform lower spoil disposal structure, uses certainly
The regular spoil disposal of movable valve control realization, it is simple to because staticly settling the mud amount caused at the bottom of air supporting sedimentation tank
Increase.
The cutoff board on the air supporting sedimentation tank top in step (2) has can open and close valve door
Downflow weir, under normal operation, valve closing intercepts the suspension class impurity that air supporting goes out, water outlet
Lower end overflow formation air supporting water outlet through cutoff board；The suspension class impurities accumulation gone out when air supporting is to one
Determine degree, when being 0.5-1.0cm such as float covering liquid level, can be real by valve opening
The outer row of now suspension class impurity.
Bottom micro-pore aeration in step (2) uses microporous diaphragm aerator, and diaphragm type
The position of riding position spoil disposal to be positioned at funnel top more than the 10cm of micro-pore aeration.
In step (2), standard discharge sewage is 2～6h in the time of staying of air supporting sedimentation tank,
The optimum time of staying is 3～4h.
Sterilizer in step (3) uses the mode of overflow-type ultraviolet-sterilization.
The air supporting water outlet in step (3) time of staying in overflow-type sterilizer be 5～
20sec, the optimum time of staying is 10～15sec.
The membrane module of the submerged ultrafiltration unit in step (3) can use hollow fiber column type
Membrane module, plate and frame assembly and hollow fiber curtain type membrane component, optimum is doughnut curtain type membrane
Assembly.
Submerged ultrafiltration material in step (3) be Kynoar, polysulfones, polyether sulfone,
The high-molecular organic material of polyacrylonitrile.
The membrane aperture scope of the submerged ultrafiltration unit in step (3) is 0.05～0.2 μm,
Optimum is 0.07～0.10 μm.
Submerged ultrafiltration unit operating flux size in step (4) is 10～30L/m2H,
Optimum operating flux size is 15～25L/m2h。
Submerged ultrafiltration unit in step (4), uses the side of external centrifugal pump circulation
Formula, carries out disturbance to the sewage in immersion water tank, and circulating load size is that water is produced in immersion ultrafiltration
3～6 times of amount, reduce fouling membrane and reduce the film silk fracture caused greatly because of aeration intensity.
The ultrafiltration membrane pool lower end of the submerged ultrafiltration unit in step (4) has funnelform
Lower spoil disposal structure, uses the regular spoil disposal of automatic valve control realization.
Sterilization processing device in step (4) uses the mode of overflow-type ultraviolet-sterilization, immersion
Water is produced in ultrafilter membrane unit ultrafiltration, and the time of staying in sterilization processing device is 10～30sec,
The excellent time of staying is 15～25sec, and the content of microorganisms after sterilization is less than 200cfu/ml.
The automatic running of submerged ultrafiltration unit in step (4) can realize dispersion wash,
Strengthening the periodical operation washed, wherein dispersion is washed and is respectively 15～60min into the water cycle, optimum
It is 20～40min；The backwash time is 60～120sec, and the backwash water yield is this group hyperfiltration membrane assembly
2～4 times of normal aquifer yield.
The submerged ultrafiltration unit chemistry cleaning frequency in step (4) is 4～12h, chemistry
Use reverse osmosis produced water preparation medicine to wash down washing liquid when strengthening washing, during pickling, control pH2～3, alkali
PH11～13 is controlled when washing.
The pickling that the chemistry of the submerged ultrafiltration unit in step (4) is strengthened washing can be selected for down
State one or more in acid: HCl, oxalic acid, citric acid, sulphuric acid and with the answering of EDTA
Join abluent.
In step (5), the reverse osmosis membrane arrangement of reverse osmosis membrane unit, uses 3～7 reverse osmosiss
The mode of membrane module series connection, preferably 4～6 reverse osmosis membrane series connection.
In step (5) reverse osmosis concentrated water circulating load is inflow 2～5 times, preferably 3～
4 times.
Reverse osmosis membrane unit membrane flux in step (5) is 10～25L/m2H, preferably 15～
20L/m2h。
The reverse osmosis membrane unit response rate in step (5) is 55～75%, preferably 60～70%.
Reverse osmosis membrane unit in step (5) has dense water end (W.E.) back flush function.
The automatic running of the reverse osmosis membrane unit in step (5) can realize dispersion wash,
Strengthening washing and soaking the periodical operation washed, wherein dispersion is washed and can be realized two ends alternately water inlet, enters
The water cycle is respectively 4～48h, and optimum is 12～24h；The back flush time is 5～20min.
The reinforcement of the reverse osmosis membrane unit in step (5) is washed and soaked the pickling during washing can
Select one or more in following acid: HCl, oxalic acid, citric acid, sulphuric acid and and EDTA thereof
Compounding abluent.
The standard discharge sewage main water quality after above-mentioned steps (1)～(5) process in city refers to
Be designated as: pH is 6.3～6.8, TOC < 2.3mg/L, conductance≤100 μ S/cm, Cl-<6mg/L、
Ca2+<0.3mg/L、Mg2+< 0.2mg/L, the system response rate are higher than 70%.
The Chemical cleaning cycle of the submerged ultrafiltration unit described in above-mentioned steps (1)～(5)
More than two months, Chemical cleaning cycle of reverse osmosis membrane unit was more than 3 months.
The present invention is with the essential distinction of prior art, the present invention relates to a kind of city up to standard
The method of advanced treatment of wastewater reuse, existing for city standard discharge advanced treatment of wastewater reuse
Most of Patents refer to use ultrafiltration and reverse osmosis combination method carried out city
The advanced treating of city's permitted discharge and reuse, but transport from the industrial membrane device involved by existing patent
From the point of view of market condition, it is complex that the degree of depth reuse described by existing patent all have employed technological process
The technical characteristic of pretreatment process, pressure type ultrafilter membrane technique and existing patent be both needed to arrange
Flocculant, antibacterial, reducing agent and the scale inhibition that intermediate water tank and cartridge filter, employing are more
Agent etc. control the microorganism of membranous system and pollute.
It is contemplated that use " simple pretreatment-immersion ultrafiltration-anti-for city permitted discharge
Infiltration " COMBINED PROCESS method that municipal sewage up to standard is carried out advanced treating and reuse.Should
The main purpose of technical method is that the pretreatment process for existing pair of film device is complicated, ultrafiltration is anti-
Osmosis process flow process arranges multiple intermediate water tank, security personnel's filtration etc., and needs to add a large amount of medicine
Agent etc. reduce suspension content and control technological innovation and the improvement that the shortcomings such as fouling membrane are carried out.With
The city permitted discharge advanced treatment recycling technique technology related in the present invention has substantive district
Not.
The invention has the beneficial effects as follows:
1, use Technology of the present invention can be greatly simplified existing city sewage deep to return
The cycle of operation with the technological process of system, improving membranous system and reduction city sewage deep treatment
The investment operating cost of reuse, improves the utilization rate of city standard discharge sewage, drops to greatest extent
Low wastewater discharge.
2, the pipeline by using ultrafiltration product water to be directly entered reverse osmosis units connects, and eliminates
It is connected to ultrafiltration and the intermediate water tank of reverse osmosis units and cartridge filter, eliminates microorganism and stop
The important place stayed and grow, reduces because the fortune that the filter element caused frequently is changed is polluted in microorganism
Row cost；
3, by changing the one-level multistage of original reverse osmosis, plural serial stage in counter-infiltration system
Reach the requirement of the system response rate, can return with the system of auto-control reverse osmosis according to water quality characteristics
Yield, reduces the hydraulic performance decline that the membranous system severe contamination caused because carrying out water slug causes；
4, ultrafiltration and reverse osmosis membrane division operation, it is achieved on-line cleaning, online disperse clean,
Online chemical immersion is washed, even if the most not affecting the product water of whole system during cleaning, i.e.
One group of cleaning, many groups are produced the operational mode of water, are improve product water efficiency；
5, using ultraviolet-sterilization method to replace original dosing sterilization, not only sterilizing rate is high, and
Can effectively reduce reagent cost, secondary pollution will not be brought.
6, use Technology of the present invention can be to city standard discharge sewage deep at
The middle low-pressure boiler makeup Water System of refining and petrochemical processing units it is back to, through work of the present invention after reason
Technology process after the main water quality index of product water be: pH is 6.3～6.8, TOC < 2.3mg/L,
Conductance≤100 μ S/cm, Cl-<6mg/L、Ca2+<0.3mg/L、Mg2+< 0.2mg/L, system are returned
Yield is higher than 70%.
7, present invention process have treatment effeciency height, cycle of operation length, the water resource response rate high,
The advantages such as investment operating cost is low.
Use Technology of the present invention can be greatly simplified existing city sewage deep reuse
The technological process of system, the cycle of operation improving membranous system and reduction city sewage deep treatment are returned
Investment operating cost, improve the utilization rate of city standard discharge sewage, reduce to greatest extent
Wastewater discharge.Use the Technology of the present invention can be deep to city standard discharge sewage
Degree is back to the middle low-pressure boiler makeup Water System of refining and petrochemical processing units, present invention process after processing
Have treatment effeciency height, cycle of operation length, the water resource response rate are high, investment operating cost is low
Advantage.
Accompanying drawing explanation
Fig. 1 is that the present invention processes municipal wastewater device technique schematic flow sheet up to standard；
Fig. 2 is ultrafilter membrane unit of the present invention and reverse osmosis membrane unit process chart.
Figure acceptance of the bid score not Biao Shi:
1-ultrafiltration water tank, 2-submerged ultrafiltration assembly, water pump, 4-buffering are produced in 3-ultrafiltration
Tank,
5-high-pressure pump, 6-reverse osmosis dosing mouth, 7-reverse osmosis module, 8-reverse osmosis concentrated water
Circulating pump,
The reverse osmosis concentrated water regulating valve of 9-, the reverse osmosis produced water tank of 10-, 11-cleanout fluid dosing mouth,
Pump washed by 12-medicine, and pump is cleaned in 13-reverse osmosis, and pump, 15-overflow-type are cleaned in 14-ultrafiltration
Ultraviolet sterilizer, 16-overflow-type ultraviolet sterilizer, 17-centrifugal circulating pump.
Detailed description of the invention
Below, in conjunction with the drawings and specific embodiments, the specific embodiment of the invention is made further
Explanation.
As shown in figure 1 and 2, the present invention uses " simple pretreatment-immersion ultrafiltration-reverse osmosis
Thoroughly " COMBINED PROCESS carries out advanced treating to municipal sewage up to standard.
Embodiment 1
City standard discharge sewerage advanced treatment process schematic flow sheet is as it is shown in figure 1, city reaches
The major parameter water quality of mark externally discharged waste water includes: pH8.2, colourity 10 times, conductance 2500 μ s/cm,
COD100mg/L, TOC33mg/L, hardness (calcium carbonate) 410mg/L, methyl orange base
Degree (calcium carbonate) 600mg/L, Cl-200mg/L, NH4 +-N30mg/L, SO4 2-
250mg/L, content of microorganisms 7 × 104Cfu/ml, total ferrum 0.1mg/L.
As in figure 2 it is shown, city standard discharge sewage uses dosing pump to carry out pipeline dosing, use
Certain density sulphuric acid regulation feedwater pH to 7.5, pH adjusted after waste water be delivered to diaphragm
Micro-porous aerator carries out having the air supporting of spoil disposal structure under funnel-form below aeration, aerating pipelines
Sedimentation tank, riding position spoil disposal to be positioned at funnel top more than the 10cm of microporous diaphragm aeration
Position；Flotation tank upper end cutoff board have can the downflow weir of open and close valve door, properly functioning
In the case of, valve closing intercepts the suspension class impurity that air supporting goes out, and water outlet is overflow through the lower end of cutoff board
Head piece forms air supporting water outlet；When the suspension class impurities accumulation that air supporting goes out to a certain extent time, can lead to
Cross valve opening and realize the outer row of suspension class impurity.During this air supporting, the hydraulics of design stops
Time is 2h.
The overflow water outlet of air supporting sedimentation tank is used to overflow-type ultraviolet sterilizer 15 through transport pump
The mode of ultraviolet-sterilization carries out sterilization treatment to the microorganism in the permitted discharge of city, and this is the most program control
The air supporting water outlet processed time of staying in overflow-type ultraviolet sterilizer 15 is 5sec, in water
Content of microorganisms content of microorganisms after sterilizer is down to 80cfu/ml.Air supporting after sterilized
Water outlet enters immersed ultrafiltration membrane pond ultrafiltration water tank 1, and this immersed ultrafiltration membrane pond lower end has leakage
Bucket-shaped lower spoil disposal structure, uses the regular spoil disposal of automatic valve control realization.Ultrafilter membrane uses leaching
Not having formula assembly 2, every cover system to have 4 groups of ultrafilter membranes, the form of submerged ultrafiltration assembly is adopted
With hollow fiber column type membrane module, ultrafiltration membrane material is PVDF, and pore size is 0.05 μm,
Often group ultrafilter membrane membrane area is 5000m2.When ultrafiltration runs, ultrafiltration is produced water pump 3 and is used suction
Mode is run, and the operating flux size of submerged ultrafiltration is 30L/m2h.In order to reduce submergence
The pollution of formula ultrafilter membrane and reduce the film silk caused greatly because of aeration intensity and damage, use external from
The mode of heart circulating pump 17 carries out zones of different suction and spray to the sewage in immersion water tank
Drenching, circulating load size is 6 times of immersion ultrafiltration aquifer yield.
Ultrafiltration is produced water and is cleaned for ultrafilter membrane self by surge tank 4 rear portion, another part
Then enter through high-pressure pump 5 supercharging after overflow-type ultraviolet sterilizer 16 carries out two-stage sterilization process
Counter-infiltration system, the water time of staying in overflow-type ultraviolet sterilizer 16 is produced in immersion ultrafiltration
For 10sec, the content of microorganisms of water outlet enters 4 groups after being down to below 20cfu/ml and individually controls
Counter-infiltration system, 6 8040 reverse osmosis modules, reverse osmosis are installed in every pressure vessel
Assembly 7 is all averagely arranged in parallel.Reverse osmosis produced water enters and produces water tank 10, reverse osmosis concentrated water
It is back to high-pressure pump 5 exit through reverse osmosis concentrated water-circulating pump 8 supercharging rear section surpass with immersion
Filter carries out circular treatment after producing water mixing, and the reverse osmosis concentrated water yield for circulation is actual aquifer yield
2 times, remainder and other sewage are blent dual disposal or process further.Regulation reverse osmosis
The aperture of saturating dense water regulating valve 9, the membrane flux size controlling counter-infiltration system is 25L/m2H and
Response rate size is 75%.
Cleaning under immersion ultrafiltration and reverse osmosis normal operation uses on-line cleaning mode.
Ultrafiltration carries out a waterpower for every 25 minutes and cleans.When waterpower is cleaned, ultrafiltration is used to produce water to super
Filter membrane is carried out.One of which ultrafilter membrane stops producing water, and ultrafiltration is cleaned pump 14 and started, slow
Rush the product water of the ultrafiltration in tank 4 and entered ultrafilter membrane by producing water end (W.E.), enter ultrafiltration membrane pool ultrafiltration water tank 1.
When ultrafiltration is cleaned, often group scavenging period is 60 seconds, and cleaning the water yield is that this group ultrafilter membrane normally produces
4 times of the water yield.
Immersion ultrafiltration carries out chemistry for every 4 hours and strengthens washing once, when chemistry is strengthened washing, uses
Reverse osmosis produced water configuration medicine washes down washing liquid, and using sulphuric acid regulation cleanout fluid pH is 2, uses hydrogen
Sodium oxide regulation pH is 12.Chemical drugs is washed pump 12 and is started, cleanout fluid dosing mouth 11 add
Corresponding cleanout fluid.Cleanout fluid is produced water end (W.E.) by film and enters ultrafilter membrane, enters ultrafiltration membrane pool ultrafiltration water
Case 1.
Reverse osmosis carries out a waterpower for every 4 hours and cleans.When waterpower is cleaned, ultrafiltration is used to produce water
Reverse osmosis membrane is carried out physics flushing.One of which reverse osmosis penetrates water valve and closes rapid with dense water valve
Closing, clean water intaking valve and cleaning drain valve is opened rapidly, reverse osmosis is cleaned pump 13 and is started,
Ultrafiltration in reverse osmosis produced water tank 10 is produced water and is entered by the water inlet end of reverse osmotic pressure force container, by
Dense water end (W.E.) is discharged into ultrafiltration membrane pool ultrafiltration water tank 1.When reverse osmosis is cleaned, often group scavenging period is 5
Minute, cleaning the water yield is often organize normal aquifer yield 2 times.
The main water quality of reverse osmosis water outlet after above-mentioned technical process processes is: pH is 6.3,
TOC is 1.1mg/L, conductance is 40 μ S/cm, Cl-For 2mg/L, Ca2+For 0.1mg/L,
Mg2+For 0.1mg/L.Above-mentioned water quality can fully meet Refining Chemical Industry middle low-pressure boiler make-up water
Water quality requirement.
Embodiment 2
City standard discharge sewerage advanced treatment process schematic flow sheet is as it is shown in figure 1, city reaches
The major parameter water quality of mark externally discharged waste water includes: pH7.3, colourity 30 times, conductance 2600 μ s/cm,
COD120mg/L, TOC40mg/L, hardness (calcium carbonate) 430mg/L, methyl orange base
Degree (calcium carbonate) 800mg/L, Cl-250mg/L, NH4 +-N40mg/L, SO4 2-
280mg/L, content of microorganisms 9 × 104Cfu/ml, total ferrum 0.3mg/L.
As in figure 2 it is shown, city standard discharge sewage uses dosing pump to carry out pipeline dosing, use
Certain density hydrochloric acid regulation feedwater pH to 6.0, pH adjusted after waste water be delivered to diaphragm
Micro-porous aerator carries out having the air supporting of spoil disposal structure under funnel-form below aeration, aerating pipelines
Sedimentation tank, riding position spoil disposal to be positioned at funnel top more than the 10cm of microporous diaphragm aeration
Position；Flotation tank upper end cutoff board have can the downflow weir of open and close valve door, properly functioning
In the case of, valve closing intercepts the suspension class impurity that air supporting goes out, and water outlet is overflow through the lower end of cutoff board
Head piece forms air supporting water outlet；When the suspension class impurities accumulation that air supporting goes out to a certain extent time, can lead to
Cross valve opening and realize the outer row of suspension class impurity.During this air supporting, the hydraulics of design stops
Time is 4h.
The overflow water outlet of air supporting sedimentation tank is used to overflow-type ultraviolet sterilizer 15 through transport pump
The mode of ultraviolet-sterilization carries out sterilization treatment to the microorganism in the permitted discharge of city, and this is the most program control
The air supporting water outlet processed time of staying in overflow-type ultraviolet sterilizer 15 is 10sec, in water
Content of microorganisms content of microorganisms after sterilizer is down to 100cfu/ml.Gas after sterilized
Emersion water enters immersed ultrafiltration membrane pond ultrafiltration water tank 1, and this immersed ultrafiltration membrane pond lower end has
Funnelform lower spoil disposal structure, uses the regular spoil disposal of automatic valve control realization.Ultrafilter membrane uses
Immersion assembly 2, every cover system has 4 groups of ultrafilter membranes, the form of submerged ultrafiltration assembly
Using plate type membrane component, ultrafiltration membrane material is PES, and pore size is 0.1 μm, often organizes ultrafiltration
Film membrane area is 5000m2.When ultrafiltration runs, ultrafiltration is produced water pump 3 and is used Smoking regime to run,
The operating flux size of submerged ultrafiltration is 10L/m2h.In order to reduce submerged ultrafiltration
Pollute and reduce the film silk caused greatly because of aeration intensity and damage, use external centrifugal circulating pump
The mode of 17 carries out zones of different suction and spray, circulating load to the sewage in immersion water tank
Size is 3 times of immersion ultrafiltration aquifer yield.
Ultrafiltration is produced water and is cleaned for ultrafilter membrane self by surge tank 4 rear portion, another part
Then enter through high-pressure pump 5 supercharging after overflow-type ultraviolet sterilizer 16 carries out two-stage sterilization process
Counter-infiltration system, the water time of staying in overflow-type ultraviolet sterilizer 16 is produced in immersion ultrafiltration
For 15sec, the content of microorganisms of water outlet enters 4 groups after being down to below 30cfu/ml and individually controls
Counter-infiltration system, 4 8040 reverse osmosis modules, reverse osmosis are installed in every pressure vessel
Assembly 7 is all averagely arranged in parallel.Reverse osmosis produced water enters reverse osmosis produced water tank 10, reverse osmosis
Saturating dense water is back to high-pressure pump 5 exit and leaching through reverse osmosis concentrated water-circulating pump 8 supercharging rear section
Carrying out circular treatment after not having the mixing of formula ultra-filtration water, the reverse osmosis concentrated water yield for circulation is actual
3 times of aquifer yield, remainder and other sewage are blent dual disposal or process further.Adjust
The aperture of joint reverse osmosis concentrated water control valve 9, the membrane flux size controlling counter-infiltration system is
20L/m2H and response rate size are 70%.
Cleaning under immersion ultrafiltration and reverse osmosis normal operation uses on-line cleaning mode.
Ultrafiltration carries out a waterpower for every 15 minutes and cleans.When waterpower is cleaned, ultrafiltration is used to produce water to super
Filter membrane is carried out.One of which ultrafilter membrane stops producing water, and ultrafiltration is cleaned pump 14 and started, slow
Rush the product water of the ultrafiltration in tank 4 and entered ultrafilter membrane by producing water end (W.E.), enter ultrafiltration membrane pool ultrafiltration water tank 1.
When ultrafiltration is cleaned, often group scavenging period is 120 seconds, and cleaning the water yield is that this group ultrafilter membrane normally produces
2 times of the water yield.
Immersion ultrafiltration carries out chemistry for every 12 hours and strengthens washing once, when chemistry is strengthened washing, adopts
Washing down washing liquid with reverse osmosis produced water configuration medicine, using hydrochloric acid regulation cleanout fluid pH is 2, uses
Sodium hydroxide regulation pH is 13.Chemical drugs is washed pump 12 and is started, cleanout fluid dosing mouth 11 add
Enter corresponding cleanout fluid.Cleanout fluid is produced water end (W.E.) by film and enters ultrafilter membrane, enters ultrafiltration membrane pool ultrafiltration
Water tank 1.
Reverse osmosis carries out a waterpower for every 12 hours and cleans.When waterpower is cleaned, ultrafiltration is used to produce
Water carries out physics flushing to reverse osmosis membrane.One of which reverse osmosis penetrates water valve and closes fast with dense water valve
Speed is closed, and cleans water intaking valve and cleaning drain valve is opened rapidly, and reverse osmosis is cleaned pump 13 and started,
Ultrafiltration in reverse osmosis produced water tank 10 is produced water and is entered by the water inlet end of reverse osmotic pressure force container, by
Dense water end (W.E.) is discharged into ultrafiltration membrane pool ultrafiltration water tank 1.When reverse osmosis is cleaned, often group scavenging period is 10
Minute, cleaning the water yield is often organize normal aquifer yield 3 times.
The main water quality of reverse osmosis water outlet after above-mentioned technical process processes is: pH is 6.7,
TOC is 1.5mg/L, conductance is 50 μ S/cm, Cl-For 3mg/L, Ca2+For 0.1mg/L,
Mg2+For 0.15mg/L.Above-mentioned water quality can fully meet the supply of Refining Chemical Industry middle low-pressure boiler
Water water quality requirement.
Embodiment 3
City standard discharge sewerage advanced treatment process schematic flow sheet is as it is shown in figure 1, city reaches
The major parameter water quality of mark externally discharged waste water includes: pH7.5, colourity 20 times, conductance 2800 μ s/cm,
COD110mg/L, TOC43mg/L, hardness (calcium carbonate) 480mg/L, methyl orange base
Degree (calcium carbonate) 650mg/L, Cl-220mg/L, NH4 +-N50mg/L, SO4 2-
350mg/L, content of microorganisms 4 × 105Cfu/ml, total ferrum 0.2mg/L.
As in figure 2 it is shown, city standard discharge sewage uses dosing pump to carry out pipeline dosing, use
Certain density hydrochloric acid regulation feedwater pH to 6.5, pH adjusted after waste water be delivered to diaphragm
Micro-porous aerator carries out having the air supporting of spoil disposal structure under funnel-form below aeration, aerating pipelines
Sedimentation tank, riding position spoil disposal to be positioned at funnel top more than the 10cm of microporous diaphragm aeration
Position；Flotation tank upper end cutoff board have can the downflow weir of open and close valve door, properly functioning
In the case of, valve closing intercepts the suspension class impurity that air supporting goes out, and water outlet is overflow through the lower end of cutoff board
Head piece forms air supporting water outlet；When the suspension class impurities accumulation that air supporting goes out to a certain extent time, can lead to
Cross valve opening and realize the outer row of suspension class impurity.During this air supporting, the hydraulics of design stops
Time is 3h.
The overflow water outlet of air supporting sedimentation tank is used to overflow-type ultraviolet sterilizer 15 through transport pump
The mode of ultraviolet-sterilization carries out sterilization treatment to the microorganism in the permitted discharge of city, and this is the most program control
The air supporting water outlet processed time of staying in overflow-type ultraviolet sterilizer 15 is 20sec, in water
Content of microorganisms content of microorganisms after sterilizer is down to 200cfu/ml.Gas after sterilized
Emersion water enters immersed ultrafiltration membrane pond ultrafiltration water tank 1, and this immersed ultrafiltration membrane pond lower end has
Funnelform lower spoil disposal structure, uses the regular spoil disposal of automatic valve control realization.Ultrafilter membrane uses
Immersion assembly 2, every cover system has 4 groups of ultrafilter membranes, the form of submerged ultrafiltration assembly
Using hollow fiber curtain type membrane component, ultrafiltration membrane material is PSF, and pore size is 0.07 μm,
Often group ultrafilter membrane membrane area is 5000m2.When ultrafiltration runs, ultrafiltration is produced water pump 3 and is used suction
Mode is run, and the operating flux size of submerged ultrafiltration is 25L/m2h.In order to reduce submergence
The pollution of formula ultrafilter membrane and reduce the film silk caused greatly because of aeration intensity and damage, use external from
The mode of heart pump 17 circulation carries out zones of different suction and spray to the sewage in immersion water tank
Drenching, circulating load size is 5 times of immersion ultrafiltration aquifer yield.
Ultrafiltration is produced water and is cleaned for ultrafilter membrane self by surge tank 4 rear portion, another part
Then enter through high-pressure pump 5 supercharging after overflow-type ultraviolet sterilizer 16 carries out two-stage sterilization process
Counter-infiltration system, the immersion ultra-filtration water time of staying in overflow-type ultraviolet sterilizer 16
For 30sec, the content of microorganisms of water outlet enters 4 groups after being down to below 60cfu/ml and individually controls
Counter-infiltration system, 3 8040 reverse osmosis modules, reverse osmosis are installed in every pressure vessel
Assembly 7 is all averagely arranged in parallel.Reverse osmosis produced water enters and produces water tank 10, reverse osmosis concentrated water
It is back to high-pressure pump 5 exit through reverse osmosis concentrated water-circulating pump 8 supercharging rear section surpass with immersion
Filter carries out circular treatment after producing water mixing, and the reverse osmosis concentrated water yield for circulation is actual aquifer yield
5 times, remainder and other sewage are blent dual disposal or process further.Regulation reverse osmosis
The aperture of saturating dense water regulating valve 9, the membrane flux size controlling counter-infiltration system is 10L/m2H and
Response rate size is 55%.
Cleaning under immersion ultrafiltration and reverse osmosis normal operation uses on-line cleaning mode.
Ultrafiltration carries out a waterpower for every 20 minutes and cleans.When waterpower is cleaned, ultrafiltration is used to produce water to super
Filter membrane is carried out.One of which ultrafilter membrane stops producing water, and ultrafiltration is cleaned pump 14 and started, slow
Rush the product water of the ultrafiltration in tank 4 and entered ultrafilter membrane by producing water end (W.E.), enter ultrafiltration membrane pool ultrafiltration water tank 1.
When ultrafiltration is cleaned, often group scavenging period is 110 seconds, and cleaning the water yield is that this group ultrafilter membrane normally produces
3 times of the water yield.
Immersion ultrafiltration carries out chemistry for every eight hours and strengthens washing once, when chemistry is strengthened washing, uses
Reverse osmosis produced water configuration medicine washes down dilution, and using hydrochloric acid regulation cleanout fluid pH is 2.5, adopts
It is 12.5 with sodium hydroxide regulation pH.Chemical drugs is washed pump 12 and is started, by cleanout fluid dosing mouth
11 add corresponding cleanout fluid.Cleanout fluid is produced water end (W.E.) by film and enters ultrafilter membrane, enters ultrafilter membrane
Pond ultrafiltration water tank 1.
Reverse osmosis carries out a waterpower for every 48 hours and cleans.When waterpower is cleaned, ultrafiltration is used to produce
Water carries out physics flushing to reverse osmosis membrane.One of which reverse osmosis penetrates water valve and closes fast with dense water valve
Speed is closed, and cleans water intaking valve and cleaning drain valve is opened rapidly, and reverse osmosis is cleaned pump 13 and started,
Ultrafiltration in reverse osmosis produced water tank 10 is produced water and is entered by the water inlet end of reverse osmotic pressure force container, by
Dense water end (W.E.) is discharged into ultrafiltration membrane pool ultrafiltration water tank 1.When reverse osmosis is cleaned, often group scavenging period is 20
Minute, cleaning the water yield is often organize normal aquifer yield 4 times.
The main water quality of reverse osmosis water outlet after above-mentioned technical process processes is: pH is 6.5,
TOC is 2.0mg/L, conductance is 90 μ S/cm, Cl-For 5mg/L, Ca2+For 0.2mg/L,
Mg2+For 0.1mg/L.Above-mentioned water quality can fully meet Refining Chemical Industry middle low-pressure boiler make-up water
Water quality requirement.
Embodiment 4
City standard discharge sewerage advanced treatment process schematic flow sheet is as it is shown in figure 1, city reaches
The major parameter water quality of mark externally discharged waste water includes: pH8.0, colourity 15 times, conductance 2700 μ s/cm,
COD130mg/L, TOC47mg/L, hardness (calcium carbonate) 460mg/L, methyl orange base
Degree (calcium carbonate) 750mg/L, Cl-300mg/L, NH4 +-N60mg/L, SO4 2-
310mg/L, content of microorganisms 2 × 105Cfu/ml, total ferrum 0.1mg/L.
As in figure 2 it is shown, city standard discharge sewage uses dosing pump to carry out pipeline dosing, use
Certain density oxalic acid regulation feedwater pH to 7.0, pH adjusted after waste water be delivered to diaphragm
Micro-porous aerator carries out having the air supporting of spoil disposal structure under funnel-form below aeration, aerating pipelines
Sedimentation tank, riding position spoil disposal to be positioned at funnel top more than the 10cm of microporous diaphragm aeration
Position；Flotation tank upper end cutoff board have can the downflow weir of open and close valve door, properly functioning
In the case of, valve closing intercepts the suspension class impurity that air supporting goes out, and water outlet is overflow through the lower end of cutoff board
Head piece forms air supporting water outlet；When the suspension class impurities accumulation that air supporting goes out to a certain extent time, can lead to
Cross valve opening and realize the outer row of suspension class impurity.During this air supporting, the hydraulics of design stops
Time is 6h.
The overflow water outlet of air supporting sedimentation tank is used to overflow-type ultraviolet sterilizer 15 through transport pump
The mode of ultraviolet-sterilization carries out sterilization treatment to the microorganism in the permitted discharge of city, and this is the most program control
The air supporting water outlet processed time of staying in overflow-type ultraviolet sterilizer 15 is 15sec, in water
Content of microorganisms content of microorganisms after sterilizer is down to 150cfu/ml.Gas after sterilized
Emersion water enters immersed ultrafiltration membrane pond ultrafiltration water tank 1, and this immersed ultrafiltration membrane pond lower end has
Funnelform lower spoil disposal structure, uses the regular spoil disposal of automatic valve control realization.Ultrafilter membrane uses
Immersion assembly 2, every cover system has 4 groups of ultrafilter membranes, the form of submerged ultrafiltration assembly
Using hollow fiber column type membrane module, ultrafiltration membrane material is polyacrylonitrile, and pore size is
0.2 μm, often group ultrafilter membrane membrane area is 5000m2.When ultrafiltration runs, ultrafiltration is produced water pump 3 and is adopted
Running with Smoking regime, the operating flux size of submerged ultrafiltration is 15L/m2h.In order to drop
The film silk that the pollution of low submerged ultrafiltration and minimizing cause greatly because of aeration intensity damages, outside employing
The mode putting formula centrifugal pump 17 circulation carries out zones of different suction to the sewage in immersion water tank
And spray, circulating load size is 4 times of immersion ultrafiltration aquifer yield.
Ultrafiltration is produced water and is cleaned for ultrafilter membrane self by surge tank 4 rear portion, another part
Then enter through high-pressure pump 5 supercharging after overflow-type ultraviolet sterilizer 16 carries out two-stage sterilization process
Counter-infiltration system, the immersion ultra-filtration water time of staying in overflow-type sterilizer 16 is
25sec, the content of microorganisms of water outlet is down to what the rear entrance of below 50cfu/ml 4 groups individually controlled
Counter-infiltration system, installs 7 8040 reverse osmosis modules, reverse osmosis group in every pressure vessel
Part 7 is all averagely arranged in parallel.Reverse osmosis produced water enters and produces water tank 10, reverse osmosis concentrated water warp
Reverse osmosis concentrated water-circulating pump 8 supercharging rear section is back to high-pressure pump 5 exit and immersion ultrafiltration
Carrying out circular treatment after water outlet mixing, the reverse osmosis concentrated water yield for circulation is actual aquifer yield
4 times, remainder and other sewage are blent dual disposal or process further.Regulation reverse osmosis
The aperture of dense water regulating valve 9, the membrane flux size controlling counter-infiltration system is 15L/m2H and return
Yield size is 60%.
Cleaning under immersion ultrafiltration and reverse osmosis normal operation uses on-line cleaning mode.
Ultrafiltration carries out a waterpower for every 23 minutes and cleans.When waterpower is cleaned, ultrafiltration is used to produce water to super
Filter membrane is carried out.One of which ultrafilter membrane stops producing water, and ultrafiltration is cleaned pump 14 and started, slow
Rush the product water of the ultrafiltration in tank 4 and entered ultrafilter membrane by producing water end (W.E.), enter ultrafiltration membrane pool ultrafiltration water tank 1.
When ultrafiltration is cleaned, often group scavenging period is 90 seconds, and cleaning the water yield is that this group ultrafilter membrane normally produces
2 times of the water yield.
Immersion ultrafiltration carries out chemistry for every 10 hours and strengthens washing once, when chemistry is strengthened washing, adopts
Wash down washing liquid with reverse osmosis produced water configuration medicine, use citric acid regulation cleanout fluid pH3, use hydrogen
Sodium oxide regulation pH12.0.Chemical drugs is washed pump 12 and is started, cleanout fluid dosing mouth 11 add
Corresponding cleaning agent.Cleanout fluid is produced water end (W.E.) by film and enters ultrafilter membrane, enters ultrafiltration membrane pool ultrafiltration
Water tank 1.
Reverse osmosis carries out a waterpower for every 24 hours and cleans.When waterpower is cleaned, ultrafiltration is used to produce
Water carries out physics flushing to reverse osmosis membrane.One of which reverse osmosis penetrates water valve and closes fast with dense water valve
Speed is closed, and cleans water intaking valve and cleaning drain valve is opened rapidly, and reverse osmosis is cleaned pump 13 and started,
Ultrafiltration in reverse osmosis produced water tank 10 is produced water and is entered by the water inlet end of reverse osmotic pressure force container, by
Dense water end (W.E.) is discharged into ultrafiltration membrane pool ultrafiltration water tank 1.When reverse osmosis is cleaned, often group scavenging period is 15
Minute, cleaning the water yield is often organize normal aquifer yield 3 times.
The main water quality of reverse osmosis water outlet after above-mentioned technical process processes is: pH is 6.8,
TOC is 2.2mg/L, conductance is 70 μ S/cm, Cl-For 4mg/L, Ca2+For 0.15mg/L,
Mg2+For 0.15mg/L.Above-mentioned water quality can fully meet the supply of Refining Chemical Industry middle low-pressure boiler
Water water quality requirement.
The foregoing is only the preferable possible embodiments of the present invention, not thereby limit to the present invention's
The scope of the claims, therefore the equivalence change that every utilization description of the invention and accompanying drawing content are made, all
It is contained in protection scope of the present invention.
Claims (15)
1. a city permitted discharge advanced treatment and reclamation method, comprises the following steps:
(1) the city standard discharge sewage carried by the road, uses pipeline dosing the mode mixed, carries out
PH regulator；
(2) by the standard discharge sewage after pH adjusted in step (1), it is delivered to bottom and there is micropore exposes
Gas, top have the air supporting sedimentation tank of cutoff board；
(3) use the mode of overflow, by the air supporting water outlet in step (2), after being delivered to sterilizer, enter leaching
Do not has formula ultrafilter membrane unit；
(4) by the ultrafiltration product water of step (3) after sterilizer processes, it is delivered to reverse osmosis membrane unit；
(5) mode of part dense water circulation is used, by a certain amount of reverse osmosis concentrated water, intensified rear and step
(4) sterilizer processes water outlet mixing, enters reverse osmosis membrane unit；
(6) by the reverse osmosis produced water in step (5), be delivered to water spot, outer row's reverse osmosis concentrated water and remaining
Discharge after the mixing of standard discharge municipal sewage；
The main water quality characteristic of described city standard discharge sewage is: pH is 7.3～8.2, colourity 10～30
Times, conductance 2500～2800 μ s/cm, COD 100～130mg/L, TOC 33～47mg/L, with calcium carbonate
Meter hardness 410～480mg/L, with calcium carbonate methyl orange alkalinity 600～800mg/L, Cl-200～300mg/L,
NH4 +-N 30～60mg/L, SO4 2-250～350mg/L, content of microorganisms 7 × 104～4 × 105Cfu/ml,
Total ferrum 0.1～0.3mg/L；
Step (2) described cutoff board have can the downflow weir of open and close valve door, under normal operation, valve
Door is closed and is intercepted the suspension class impurity that air supporting goes out, and water outlet forms air supporting water outlet through the lower end overflow of cutoff board；Work as gas
The suspension class impurities accumulation of emersion to a certain extent time, the outer row of suspension class impurity can be realized by valve opening.
A kind of city the most according to claim 1 permitted discharge advanced treatment and reclamation method, its feature exists
In, the pH regulator in step (1) is pH6.0～7.5.
A kind of city the most according to claim 2 permitted discharge advanced treatment and reclamation method, its feature exists
In, described pH regulator is 6.5～7.0.
A kind of city the most according to claim 1 permitted discharge advanced treatment and reclamation method, its feature exists
In, the micro-pore aeration described in step (2) uses microporous diaphragm aerator, and microporous diaphragm aerator
It is positioned at the position of spoil disposal funnel top more than 10cm.
A kind of city the most according to claim 1 permitted discharge advanced treatment and reclamation method, its feature exists
In, described in step (2), standard discharge sewage is 2～6h in the time of staying of air supporting sedimentation tank.
A kind of city the most according to claim 1 permitted discharge advanced treatment and reclamation method, its feature exists
In, the sterilizer in step (3) uses the mode of overflow-type ultraviolet-sterilization, and described air supporting water outlet is in sterilization
The time of staying in device is 5～20sec.
A kind of city the most according to claim 1 permitted discharge advanced treatment and reclamation method, its feature exists
In, the submerged ultrafiltration unit membrane pore diameter range in step (3) is 0.05～0.2 μm.
A kind of city the most according to claim 1 permitted discharge advanced treatment and reclamation method, its feature exists
In, the submerged ultrafiltration unit operating flux size described in step (3) is 10～30L/m2h。
A kind of city the most according to claim 1 permitted discharge advanced treatment and reclamation method, its feature exists
In, the submerged ultrafiltration unit described in step (3), use the mode of external centrifugal pump circulation, right
Sewage in immersion water tank carries out disturbance, and circulating load size is 3～6 times of immersion ultrafiltration aquifer yield.
A kind of city the most according to claim 1 permitted discharge advanced treatment and reclamation method, its feature
Being, the sterilizer described in step (4) uses the mode of overflow-type ultraviolet-sterilization, and ultrafiltration produces water in sterilization
The time of staying in device is 10～30sec.
11. a kind of city according to claim 1 permitted discharge advanced treatment and reclamation methods, its feature exists
In, the submerged ultrafiltration unit chemistry cleaning frequency described in step (3) is 4～12h, and chemistry is strengthened washing
Shi Caiyong reverse osmosis produced water preparation medicine wash down washing liquid, during pickling control pH 2～3, during alkali cleaning control pH 11～
13。
12. a kind of city according to claim 1 permitted discharge advanced treatment and reclamation methods, its feature
It is that the reverse osmosis membrane arrangement of reverse osmosis membrane unit described in step (5) uses 3～7 reverse osmosis membrane groups
The mode of part series connection.
13. a kind of city according to claim 1 permitted discharge advanced treatment and reclamation methods, its feature
It is, reverse osmosis concentrated water circulating load is inflow 2～5 described in step (5) times.
14. a kind of city according to claim 1 permitted discharge advanced treatment and reclamation methods, its feature
Being, the reverse osmosis membrane unit membrane flux described in step (5) is 10～25L/m2h。
15. a kind of city according to claim 1 permitted discharge advanced treatment and reclamation methods, its feature
Being, the reverse osmosis membrane unit response rate described in step (5) is 55～75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310233588.0A CN104230039B (en) | 2013-06-13 | A kind of city permitted discharge advanced treatment and reclamation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310233588.0A CN104230039B (en) | 2013-06-13 | A kind of city permitted discharge advanced treatment and reclamation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104230039A CN104230039A (en) | 2014-12-24 |
| CN104230039B true CN104230039B (en) | 2016-11-30 |
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