CN103420519A - Combined processing technology for slightly polluted raw water - Google Patents
Combined processing technology for slightly polluted raw water Download PDFInfo
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- CN103420519A CN103420519A CN2012101476374A CN201210147637A CN103420519A CN 103420519 A CN103420519 A CN 103420519A CN 2012101476374 A CN2012101476374 A CN 2012101476374A CN 201210147637 A CN201210147637 A CN 201210147637A CN 103420519 A CN103420519 A CN 103420519A
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Abstract
The invention discloses a combined processing technology for slightly polluted raw water. The raw material water firstly enters into a first ozone contact tank for pre-ozonation, then enters into a flocculation sedimentation tank for sedimentation treatment, after sedimentation, the water enters into a secondary ozone contact tank for ozonation decomposition, then enters into a carbon sand filtering tank for filtering, the filtered water enters into a membrane processing system, the membrane-processed water enters into a clean water tank for dispatching and storing and are disinfected in the clean water tank by adding chlorine, and the water enters into a suction well and is conveyed to a water distribution network via a pump set in a clean water pump house. The combined processing technology of the invention has the advantages that: the finished water coming from the processed slightly polluted raw water can not only be guaranteed to reach the sanitary standard for drinking water, but also meet higher requirements in some indexes, and is eliminated in microbial overweight risk and effectively removed in humic acid and cryptosporidium and giardia. Additionally , compared with the prior art, the combined processing technology combined with advanced treatment process helps to saves land occupations of a sand filtering tank and a disinfection contact tank and enable water quality upgrading construction of an existing water factory with a compact field to be implemented.
Description
Technical field
The present invention is a kind of water treatment combination reinforcing process, the specifically a kind of combined treatment process for micro-polluted raw related in water supply engineering.
Background technology
Execution along with " the Urban water supply water quality standard " of Minstry of Housing and Urban-Rural Development of People Republic of China (MOHURD) issue, and the enforcement of country " drinking water sanitary standard (GB5749-2006) ", the common process water factory that China is polluted at most of water source all faces the task of water-purifying process upgrading.
Along with the enforcement in succession of new industry standard and national standard, the comparatively prosperity and the Yangtze River Delta and the Pearl River Delta recent years of the general heavy contamination in water source are progressively implemented upgrading to water factory's water-purifying process of China's economy, wherein the starting in Zhejiang Province is early.According to the modern water factory output water gold standard of defined in " Zhejiang Province's Urban water supply modern water factory judgement criteria ", wherein require the turbidity<0.1NTU of water factory's water outlet, CODMn<2.0mg/l.
Hangzhou Shui Ye Group Co.,Ltd starts master city, Hangzhou water factory has been carried out being intended to promoting the water-purifying process transformation of water quality from last century end, wherein the built operation of Southern Star Waterworks of pre-ozone and rear ozone-BAC process has been set up on the conventional water treatment process basis, effluent quality has met above-mentioned every new standard requirement substantially, but built the restriction of site condition, the storage capacity of improved water factory clear-water reservoir is very limited, is difficult to meet water factory's traffic control requirement.In addition, delivery turbidity and Zhejiang Province's modern water factory Effluent criteria still have gap.
At present, pre-ozone adds the more generally main selection as water factory's upgrading by each water utilities company of ozone and activated carbon technique, but the construction place of most of water factories is at full stretch, how to solve the contradiction of building place and water-quality guideline, become gradually the main bugbear that each water factory of restriction implements upgrading.In addition, how further to reduce delivery turbidity and meet the industry water quality standard, and eliminate output water microorganism risk of exceeding criterion, also become in the water quality lifting and need the problem solved.
For the water quality standard for drinking water that reaches increasingly stringent with save the waterworks construction land used, along with reaching its maturity and the fast-descending of mould material price of the development of film new material technology, membrane treatment process, the construction investment cost is descended year by year.Therefore increasingly mature for different conditions and film water purification technology, how to avoid and eliminate the new contradiction and problems produced after above-mentioned water factory water-purifying process upgrading, further exploratory development is treated to the water-purifying process technology of core with film, being current the faced important topic of China's water supply industry, is also the needs of national sustainable development and economic construction after China enters the new millennium.
Summary of the invention
The purpose of this invention is to provide a kind of reinforcing process of the combination for micro-polluted raw, be suitable for organism higher, comprise the processing of the micro-polluted raw that possible iron, manganese, ammonia nitrogen exceed standard.
To achieve these goals, technical scheme of the present invention is as follows: a kind of reinforcing process of the combination for micro-polluted raw, it is characterized in that this technique comprises the following steps: former water is introduced into pre-ozone contact tank, water after pre-ozone oxidation enters the flocculation sedimentation tank precipitation process, after heavy, water enters after middle ozone contact tank decomposes by ozone oxidation and enters the filtration of charcoal sand filter, after filter, water enters film processing system, water after film is processed enters clean water basin and regulates and stores and store and chlorination in clean water basin, after clean water basin to suction well and there is clean water pump room pump group to deliver into the distribution system of water supply.The charcoal sand filter comprises in the body of Ti， pond, pond upper and lower two-layer filtrate is set, its at the middle and upper levels filtrate adopt granulated active carbon, lower floor's filtrate adopts the coarse sand filtrate.
The present invention is a kind of micro-polluted raw combined depth treatment process, situation about still exceeding standard for micro-polluted raw turbidity and organic content after routine is processed, by pre-ozone, flocculation sediment, middle ozone, charcoal sand are filtered to the treatment scheme mutually integrated with membrane technique, guarantee to process rear water quality and meet " drinking water sanitary standard (GB5749-2006) ", more on some index, reach requirements at the higher level, comprise Fe<0.05 mg/L, Mn<0.05 mg/L, COD
Mn<2.0mg/L, turbidity<0.1NTU, eliminate the microorganism risk of exceeding criterion, effectively removes humic acid and two worms.
The accompanying drawing explanation
Fig. 1 is treatment process schematic diagram of the present invention.
The layout drawing that Fig. 2 is charcoal sand filter one embodiment.
Embodiment
As shown in the figure, a kind of intensifying device of the combination for micro-polluted raw, comprise the pre-ozone contact tank 1, flocculation sedimentation tank 2, middle ozone contact tank 3, charcoal sand filter 4, film processing system 5, clean water basin 6, pump house 7 and the distribution system of water supply 8 that connect successively.
It is mainly in conjunction with the follow-up technique needs that the charcoal sand filter is set that strengthening adds ozone in advance, and substitute the Coagulation aiding of the prechlorination that first conventional treatment process generally adopts, avoid exceed standard phenomenon and to the biological action disadvantageous effect of charcoal sand filter of halides that chlorination causes.And manganese is carried out to the efficient oxidation, for improving precipitation demanganization efficiency, create conditions.Can also improve the dissolved oxygen of water, for the charcoal sand filter is removed the part ammonia nitrogen and organism creates conditions simultaneously.
Flocculation sediment is in order to meet the effective removal to turbidity, by dosing coagulant, can make particle tiny in former water form larger flco, thereby realize the removal of large particulate matter.
Middle ozone contact is mainly for various organic-inorganic pollution substances in oxygenolysis water change the structure of matter of part hard degradation, and the biodegradability of water is improved, and is conducive to follow-up bioprocess.And utilize the oxidation capacity of ozone to ammonia nitrogen and nitrite nitrogen, further reduce the colourity of water and smell flavor.Ozone and gac combine and have improved widely the processing efficiency of activated carbon process, have extended the work period of gac,
The charcoal sand filter is mainly in order further to remove turbidity and to cause micro-content organism, the colourity of mouthfeel in water and the objectionable impurities of the human body long-term health being brought safely to impact, as agricultural chemicals, algae toxin and environmental hormone etc.; Reduce the assimilated organic carbon content in water, improve the biologically stable of output water; The follow-up membrane module of Organic pollutants in anti-sealing; Also can make the microbial film and the broken charcoal that come off in carbon leaching material again be held back by sand, for lower one film treatment process increased protective barrier one simultaneously.
Charcoal sand filter design filtering velocity 7.5 ~ 10m/h, charcoal bed 6 ~ 20 minutes residence time of absorption.The charcoal sand filter is provided with upper and lower two-layer filtrate, and it is filtrate 10 employing granulated active carbons at the middle and upper levels, adopt 8 * 30 orders, tap density 0.35～0.55g/cm
3, effective size of grain D=0.90mm, nonuniformity coefficient≤2.0 (D
80/ D
10), filtrate thickness touches the time according to empty bench grafting and filtration area is determined, and according to a preferred embodiment of the invention, the thickness of carbon leaching material is 1 ~ 1.5m; Lower floor's filtrate adopts the coarse sand filtrate, and its thickness is 0.40 ~ 0.60m, effective size of grain 0.5mm, nonuniformity coefficient≤1.6 (D
80/ D
10), adopting the water distribution of strainer head mode, final head loss is 2.5m.And add the independent water mode of rushing with the punching of independent gas and carry out back flushing: air blasting intensity 55m
3/ m
2.h, water rushes intensity 25m
3/ m
2.h.Approximately 1～2 day recoil cycle.By resistance water distribution in adopting, air water rinses respectively and it is close and rinse the means such as velocity slope meets the demands to control turgidity while rinsing by two kinds of particle diameter of filter medium of choose reasonable, efficiently solves the mixed layer of filtrate and the more serious problem of upper strata light filter material loss.The layout drawing that Fig. 2 is charcoal sand filter one embodiment.In figure, 12 is back-purge system, and this system is prior art, does not repeat them here.
It is mainly in order more effectively to remove turbidity and particulate matter in water that film is processed, the effective removal to bacterium, humic acid, sporangiocyst and algae by film simultaneously, and greatly alleviate follow-up sterilization difficulty, thereby special sterilization contact measure can be set and reduce sterilizing agent throwing amount.
The concrete technology flow process is, first adopt pre-ozone contact tank 1 carry out pre-treatment, the flocculation horizontal sedimentation tank 2 precipitated, water outlet enters charcoal sand filter 4 after entering middle ozone contact tank 3 oxidations, water outlet enters film processing system 5 again and carries out membrane filtration, and the membrane module water outlet is sent into the distribution system of water supply 8 by repumping house 7 after regulating and storing by clean water basin 6.
When raw water quality is better, but centering ozone contact tank 4, or membrane module unit 5 is surmounted.
Should be before flocculation sedimentation tank in combination process dosing coagulant, add ozone at rear ozone contact tank, add Cl before clean water basin
2.
The present invention has passed through the action oriented research in conjunction with water factory's conventional processing system.The test-results demonstration, system is 51.7% to organic clearance, water COD after processing
Mn<2.0mg/L, after processing, average turbidity is 0.02NTU, all<0.1NTU; Clearance to ammonia nitrogen is 45%～90%, and in water outlet, manganese content is less than 0.05 mg/L, and this all removes iron-based.
Characteristics of the present invention are described:
1, the conventional water treatment generally adopted both at home and abroad is in conjunction with all sand filter and activated carbon filter being arranged respectively in the advanced treatment water technology, bear respectively and remove turbidity and remove organic function, the present invention unites two into one the two in combined treatment process, be set to charcoal sand double-bed filter, be specially the sand filtering material of having set up 0.5m under the charcoal layer of activated carbon filter, filter tank had concurrently and remove turbidity and organic function.Simultaneously, use the middle resistance water distribution mode of traditional activated carbon filter filter, adopt air water to rinse respectively, to coordinate, select two kinds of particle diameter of filter medium, effectively control the mixed layer of the filtrate phenomenon of traditional double-bed filter.By the innovative approach to these traditional forms, guarantee the optimization of the running status of charcoal sand filter, practical function unites two into one.
2, in water technology, the film processing unit generally adopts the micro-filtration ultra-filtration membrane to remove bacterium, algae, sporangiocyst (comprising Cryptosporidium and first flagellate), turbidity and humic acid, but film is processed almost not removal effect of organism.
After tradition water technology sand filter, the minimum 0.2 ~ 0.3NTU left and right that is generally of output water turbidity, can't further reduce.In addition, traditional conventional treatment process in conjunction with advanced treatment process in, activated carbon filter water outlet microorganism total amount will increase, special antisepsis contact tank must be set, to guarantee effective deactivation of chlorination, if it is improper to sterilize, the possibility that has the water microorganism risk of exceeding criterion to exist.And simple membrane treatment process can't meet organic removal effect.
Therefore, after this combination routine is incorporated into the charcoal sand filter in conjunction with advanced treatment process by the film processing unit, give full play to the effective removal effect of front road treatment process to turbidity, organism, ammonia nitrogen and ferrimanganic etc., and further reduce turbidity at the posterior membrane processing unit, eliminating the risk that microorganism exceeds standard fully, is that the fraction of output water turbidity<0.1NTU reaches 100%.
3, optimum combination treatment process of the present invention, under the effective processing prerequisite reached micro-polluted raw, has reduced sand filter and antisepsis contact tank than traditional conventional processing in conjunction with advanced treatment process, greatly cost saving and occupation of land.
4, propose first in combination process before the charcoal sand filter, middle ozone contact tank to be set after heavy, be different from general conventional depth and process the rear ozone arranged after sand filter.
5, do not need the intermediate lift pump room is set, need to establish the intermediate lift pump room after being different from the traditional technology sand filter, water extraction is risen to activated carbon filter.
Pre-ozone contact tank described in the present invention, flocculation sedimentation tank, middle ozone contact tank, film processing system, clean water basin, pump house and the distribution system of water supply are prior art, do not repeat them here.
Claims (5)
1. the reinforcing process of the combination for micro-polluted raw, it is characterized in that this technique comprises the following steps: former water is introduced into pre-ozone contact tank, water after pre-ozone oxidation enters the flocculation sedimentation tank precipitation process, after heavy, water enters the filtration of charcoal sand filter, after filter, water enters film processing system, water after film is processed enter clean water basin regulate and store store and in clean water basin chlorination, after clean water basin to suction well and there is clean water pump room pump group to deliver into the distribution system of water supply.
2. technique as claimed in claim 1, is characterized in that, before the charcoal sand filter, middle ozone contact tank is set.
3. technique as claimed in claim 2, is characterized in that dosing coagulant before flocculation sedimentation tank, at pre-ozone contact tank and middle ozone contact tank, adds ozone, adds chlorine before clean water basin.
4. technique as claimed in claim 1, is characterized in that the charcoal sand filter comprises in the body of Ti， pond, pond upper and lower two-layer filtrate is set, its at the middle and upper levels filtrate adopt granulated active carbon, lower floor's filtrate adopts the coarse sand filtrate.
5. technique as claimed in claim 4, is characterized in that granulated active carbon adopts 8 * 30 orders, tap density 0.35～0.55g/cm
3, the effective size of grain of coarse sand filtrate is 0.5mm.
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| CN2012101476374A CN103420519A (en) | 2012-05-14 | 2012-05-14 | Combined processing technology for slightly polluted raw water |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355467A (en) * | 2014-11-11 | 2015-02-18 | 杭州安耐杰科技有限公司 | Circulating cooling water filling purification system |
| CN104591451A (en) * | 2014-12-25 | 2015-05-06 | 江苏水智乐自动化设备有限公司 | Tap water purification system |
| CN105836943A (en) * | 2016-05-25 | 2016-08-10 | 南京慧城水处理设备有限公司 | Method and equipment for removing AOC content in long-term stored water to achieve stable water quality |
| CN106045133A (en) * | 2016-08-08 | 2016-10-26 | 上海市政工程设计研究总院（集团）有限公司 | Advanced water treatment combined structures |
| CN106045210A (en) * | 2016-07-15 | 2016-10-26 | 长安大学 | Advanced treatment process and system for micro-polluted source water |
| CN106145555A (en) * | 2016-08-30 | 2016-11-23 | 上海市政工程设计研究总院（集团）有限公司 | A kind of efficient combination processing system for high NH4 source water |
| CN106277605A (en) * | 2016-08-30 | 2017-01-04 | 上海市政工程设计研究总院（集团）有限公司 | A kind of method for high-efficiency combined treatment for high NH4 source water |
| CN108285227A (en) * | 2018-04-04 | 2018-07-17 | 深圳市利源水务设计咨询有限公司 | A kind of dosing system and its addition method improving water factory's water outlet pH value |
| CN111285505A (en) * | 2020-03-27 | 2020-06-16 | 浙江双益环保科技发展有限公司 | Reservoir water treatment process |
| CN111302534A (en) * | 2020-04-02 | 2020-06-19 | 四川锦城佳禾生态环保科技有限公司 | Efficient direct drinking treatment method for regional tap water |
| CN111620473A (en) * | 2020-06-10 | 2020-09-04 | 闵桂青 | Water treatment method |
| CN111847762A (en) * | 2020-06-08 | 2020-10-30 | 同济大学 | Treatment device for treating raw water with low organic matter content and application thereof |
| CN112142243A (en) * | 2020-09-30 | 2020-12-29 | 上海城市水资源开发利用国家工程中心有限公司 | Water treatment device and treatment method |
| CN112174407A (en) * | 2020-10-26 | 2021-01-05 | 武汉理工大学 | Multifunctional combined pool for drinking water treatment |
| CN112573764A (en) * | 2020-11-25 | 2021-03-30 | 武汉理工大学 | Multistage barrier modularized drinking water grading treatment system |
| CN112744979A (en) * | 2020-12-04 | 2021-05-04 | 山东农业大学 | Method for treating micro-polluted water |
| CN113371922A (en) * | 2020-03-09 | 2021-09-10 | 南京理工大学 | Method for removing turbidity, chemical oxygen consumption and ammonia nitrogen in raw water in enhanced mode |
| CN113845249A (en) * | 2021-09-23 | 2021-12-28 | 山东建筑大学 | System and process for treating tap water for ceramic membrane-based tap water plant |
| WO2023040017A1 (en) * | 2021-09-15 | 2023-03-23 | 上海城市水资源开发利用国家工程中心有限公司 | Short-flow water supply treatment system and treatment process thereof |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104355467A (en) * | 2014-11-11 | 2015-02-18 | 杭州安耐杰科技有限公司 | Circulating cooling water filling purification system |
| CN104591451A (en) * | 2014-12-25 | 2015-05-06 | 江苏水智乐自动化设备有限公司 | Tap water purification system |
| CN105836943A (en) * | 2016-05-25 | 2016-08-10 | 南京慧城水处理设备有限公司 | Method and equipment for removing AOC content in long-term stored water to achieve stable water quality |
| CN106045210A (en) * | 2016-07-15 | 2016-10-26 | 长安大学 | Advanced treatment process and system for micro-polluted source water |
| CN106045210B (en) * | 2016-07-15 | 2019-08-06 | 长安大学 | A kind of slightly-polluted raw water advanced treatment process and system |
| CN106045133A (en) * | 2016-08-08 | 2016-10-26 | 上海市政工程设计研究总院（集团）有限公司 | Advanced water treatment combined structures |
| CN106145555A (en) * | 2016-08-30 | 2016-11-23 | 上海市政工程设计研究总院（集团）有限公司 | A kind of efficient combination processing system for high NH4 source water |
| CN106277605A (en) * | 2016-08-30 | 2017-01-04 | 上海市政工程设计研究总院（集团）有限公司 | A kind of method for high-efficiency combined treatment for high NH4 source water |
| CN108285227A (en) * | 2018-04-04 | 2018-07-17 | 深圳市利源水务设计咨询有限公司 | A kind of dosing system and its addition method improving water factory's water outlet pH value |
| CN113371922A (en) * | 2020-03-09 | 2021-09-10 | 南京理工大学 | Method for removing turbidity, chemical oxygen consumption and ammonia nitrogen in raw water in enhanced mode |
| CN111285505A (en) * | 2020-03-27 | 2020-06-16 | 浙江双益环保科技发展有限公司 | Reservoir water treatment process |
| CN111302534A (en) * | 2020-04-02 | 2020-06-19 | 四川锦城佳禾生态环保科技有限公司 | Efficient direct drinking treatment method for regional tap water |
| CN111847762A (en) * | 2020-06-08 | 2020-10-30 | 同济大学 | Treatment device for treating raw water with low organic matter content and application thereof |
| CN111620473A (en) * | 2020-06-10 | 2020-09-04 | 闵桂青 | Water treatment method |
| CN112142243A (en) * | 2020-09-30 | 2020-12-29 | 上海城市水资源开发利用国家工程中心有限公司 | Water treatment device and treatment method |
| CN112174407A (en) * | 2020-10-26 | 2021-01-05 | 武汉理工大学 | Multifunctional combined pool for drinking water treatment |
| CN112573764A (en) * | 2020-11-25 | 2021-03-30 | 武汉理工大学 | Multistage barrier modularized drinking water grading treatment system |
| CN112744979A (en) * | 2020-12-04 | 2021-05-04 | 山东农业大学 | Method for treating micro-polluted water |
| WO2023040017A1 (en) * | 2021-09-15 | 2023-03-23 | 上海城市水资源开发利用国家工程中心有限公司 | Short-flow water supply treatment system and treatment process thereof |
| CN113845249A (en) * | 2021-09-23 | 2021-12-28 | 山东建筑大学 | System and process for treating tap water for ceramic membrane-based tap water plant |
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Application publication date: 20131204 |