CN101817616B - Biologic unit combined treatment method for improving biological stability of drinking water quality - Google Patents
Biologic unit combined treatment method for improving biological stability of drinking water quality Download PDFInfo
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- CN101817616B CN101817616B CN2010101302477A CN201010130247A CN101817616B CN 101817616 B CN101817616 B CN 101817616B CN 2010101302477 A CN2010101302477 A CN 2010101302477A CN 201010130247 A CN201010130247 A CN 201010130247A CN 101817616 B CN101817616 B CN 101817616B
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Abstract
The invention relates to a biologic unit combined treatment method for improving the biological stability of drinking water quality, which is characterized by sequentially processing the water to be treated in a biological aerated filter, an ozone generator and a biological activated carbon reactor. By adopting the method, organic pollutants, especially biodegradable organic matters capable of resulting in poor biological stability of water quality can be effectively removed. The method has the advantages of good removal effect of the organic matters, stable and safe effluent quality, no need of chemical agents, low cost and the like.
Description
Technical field:
The invention belongs to technical field of drinking water treatment, relate to a kind of biologic unit combined treatment method that improves biological stability of drinking water quality.
Background technology:
Because the industrial or agricultural that continues is polluted; Make the poisonous and harmful organic pollutant entering water body and the water conservation for a long time of a large amount of difficult degradations not receive enough attention, the drinking water source generally receives the pollution of ammonia nitrogen and organism etc.; Caused the deterioration of source quality; These organic pollutants comprise self micro quantity organic pollutant to the toxic elements in human body evil, like carcinogenic, teratogenesis, mutagenic matter etc. and cholorination by product, also comprise some deliquescent other organic pollutants etc.Because the limitation of conventional water-purifying process; These miscellaneous organism can not be by effective removal; Contain natural organic matter, the artificial synthetic organic materials that human body is had direct harm and potential hazard toward contact in the output water after the processing; Be prone to generate the dissolved organic matter of trichloromethane DBPs (DBP) such as (THMs) with the chlorine reaction; And can cause mikrobe regrowth in water distribution system, and producing the organism of " biological instability " etc., this will greatly threaten the chemical safety and the biologically stable of tap water.Though chlorine residue an amount of in the maintenance pipe network can suppress the growth of bacterium to a certain extent, if there is the organism nutraceutical matrix, even keep higher chlorine residue, bacterium still can grow.Bacterium is microbial film attached to utilizing the nutraceutical matrix growth to form on the tube wall at random; The tube wall microbial film possibly become the inducement of wall erosion fouling; And biomembranous aging coming off can be worsened water quality, and the colourity of user's water and turbidity are risen, and bacterial count increases; This will cause the increase of chlorine dosage, thereby can cause the increase of chloro DBPs.Organism of no matter not removing or increasing chlorine dose all will reduce safety of drinking water property.
Summary of the invention:
The object of the invention just is to provide a kind of biologic unit combined treatment method that improves biological stability of drinking water quality; This method is used for the method to water treatment with BAF and ozone-biological activated carbon combination process; Being particularly useful for the more serious Micro-polluted Water of organic contamination, is the higher drinking water treatment method of a kind of water quality biological stability.
As above design; Technical scheme of the present invention is: a kind of biologic unit combined treatment method that improves biological stability of drinking water quality is characterized in that: pending water is passed through successively the processing of BAF, ozonizer and biological activated carbon reactor drum; Concrete steps are:
(1) bottom or the top that pending water are provided with the BAF of aerating apparatus from the bottom get into; Air feeds from the bottom of BAF; Air gas discharges and the water uniform mixing through aerating apparatus; Organic pollutant in the water and ammonia nitrogen are by the removal of microorganisms on the filtrate, and the water after the rough handling flows out from the top or the bottom water outlet of BAF; BAF air gas is 1.0~3: 1 with the ratio of water, is 10~60min in the empty bed residence time;
(2) water outlet of BAF gets into from the bottom or the top of ozone reactor; Ozone gas feeds from the bottom of ozone reactor; Said ozone gas is through air distribution plate or other distribution device and water uniform mixing in the ozone reactor; The ozone gas ozone reactor of upwards flowing through contacts with water in reactor drum, and the organic pollutant in the water is removed or transforms; Water after the rough handling flows out from the top or the bottom water outlet of ozone reactor, and ozone tail gas is discharged from the gas discharge outlet of ozone reactor; The water outlet contact reacts time of ozone and BAF is 10~30min in the ozonizer, ozone dosage 1.0~10mg/L;
(3) water outlet of ozone reactor flows into from the bottom or the top of biological activated carbon reactor drum; The biological activated carbon layer that current are filled in the biological activated carbon reactor drum; Organic pollutant is able to remove by charcoal absorption, biological degradation in the water, and the water after the processing flows out from the other end of biological activated carbon reactor drum; The time that stops in reactor drum through the water after the ozonizer processing in the biological activated carbon reactor drum is 10~60min.
The principle that the present invention handles micro-polluted water is: in the BAF unit; Filter material surface has adhered to a large amount of mikrobes; Current are when BAF; Can be under mikrobe and dissolved oxygen effect in the water by the organism of biological degradation utilization, the removal that is degraded, pollutents such as the ammonia nitrogen in the water, iron, manganese are also transformed or are removed simultaneously; In the ozone reactor unit, under the ozone oxidation effect, the macromole in the water can not be oxidized to small organic molecule by biodegradable organism, and organic biodegradable is improved, or the small organic molecule in the water is directly removed by ozone oxidation; In the biological activated carbon unit; In activated carbon surface and the endoporus mikrobe that grown; Current are when biological activated carbon; Organism in the water and other pollutent are by these mikrobe absorption and degraded, and those biodegradable organics that are converted in the ozone reactor unit are removed in the biological activated carbon unit.
The present invention is in the same place BAF and ozone/biological activated carbon technical combinations, is applied to micro-polluted water and handles removal organic pollutant etc., improves the water quality biological stability of water outlet.The present invention has following advantage and positively effect:
(1) organic matter removal is effective.Mainly remove BDOC and ammonia nitrogen through the BAF unit; Then through the ozone reactor unit; Utilize ozone not to be oxidized to small organic molecule by biodegradable larger molecular organics; Improve organic biodegradable, removed by follow-up biological activated carbon unit, or ozone is directly removed small organic molecule.
(2) guarantee water quality stability, effluent quality is good.Utilize BAF and ozone/biological activated carbon technology to remove the organism in the micro-polluted source water; Particularly biodegradable that part of organism; Reduced the possibility of flora regrowth in the water transfer pipe network; When improving the output water biologically stable, also reduced corrosion to pipe network; BAF can effectively be removed the ammonia nitrogen in the water, can reduce the consumption of the liquid chlorine that causes because of ammonia nitrogen, thereby reduces the level of DBPs DBPs such as THMs indirectly; BAF unit and biological activated carbon technology also have removal effect preferably to pollutents such as iron, manganese simultaneously, can further ensure the stability and the security of water quality.
(3) conventional relatively drinking water treatment method, this method does not need chemical agent, economical, efficient, environmental protection.
Description of drawings:
Fig. 1 is a process flow diagram of the present invention.
Embodiment:
Pending water gets into from the bottom or the top of BAF, and air feeds from the bottom in said filter tank, and the bottom in filter tank is provided with aerating apparatus; GWR is 1.0~3: 1, in the filter tank, stops 10~60min, and organic pollutant in the water and ammonia nitrogen etc. are by the removal of microorganisms on the filtrate; Water after the rough handling flows out from the water outlet of top, filter tank or bottom, gets into the bottom or the top of ozone reactor, and ozone gas feeds from reactor bottom; Ozone gas flow to current in the same way or incorgruous; With water contact reacts 10~30min in reactor drum, ozone dosage 1.0~10mg/L, the organic pollutant in the water is removed or transforms.Water after the rough handling is flowed out by ozone reactor top or bottom; Bottom or top by the biological activated carbon reactor drum get into reactor drum; The biological activated carbon layer that current are filled in reactor drum; In reactor drum, stop 10~60min, organic pollutant is able to remove by charcoal absorption, biological degradation in the water.Water after the processing flows out from the reactor drum the other end.
Experiment embodiment:
Adopt BAF (BAF) and ozone-biological activated carbon (BAC) combination process to handle the source water-Luan Heshui of certain waterworks, the treatment scheme synoptic diagram is seen Fig. 1.Former water water temperature is 16.5~22.0 ℃, and turbidity is about 6NTU, COD
MnBe respectively 3.83mg/L and 2.83mg/L with DOC MV, BDOC MV is about 0.5mg/L, UV
254MV is about 0.043, and molecular weight is higher less than 1000 organism proportion, about 75%.BAF 1 filtrate adopts biological ceramic particle, by the top water inlet, and empty bed residence time 30min, GWR is 1.5: 1; Ozone reactor 3 is by bottom water inlet, ozone reaction 20min duration of contact, ozone dosage 1.5mg/L; Biological activated carbon reactor drum 4 is by the top water inlet, and empty bed residence time 22.5min, the water after the processing flow into and produce water tank 5 from the other end outflow of biological activated carbon reactor drum.One intermediate water tank 2 can be set between above-mentioned BAF and the ozonizer.
Luanhe River water is handled through BAF, and the average removal rate of BDOC has reached 54.0%, and molecular mass is lower than 1000 organic removal rate and has reached 22.3%.Luanhe River water is handled through ozone/biological activated carbon, and the average removal rate of DOC is 33.7%, and what remove mainly is molecular weight less than 3000 small organic molecule.Luanhe River water is handled COD through the whole process of BAF and ozone-biological activated carbon combination process
MnReached 55.1% and 41.1% with the DOC clearance.
Claims (1)
1. a biologic unit combined treatment method that improves biological stability of drinking water quality is characterized in that: pending water is passed through successively the processing of BAF, ozone reactor and biological activated carbon reactor drum; Concrete steps are:
(1) bottom or the top that pending water are provided with the BAF of aerating apparatus from the bottom get into; Air feeds from the bottom of BAF; Air gas discharges and the water uniform mixing through aerating apparatus; Organic pollutant in the water and ammonia nitrogen are by the removal of microorganisms on the filtrate, and the water after the rough handling flows out from the top or the bottom water outlet of BAF; BAF air gas is 1.0~3: 1 with the ratio of water, is 10~60min in the empty bed residence time;
(2) water outlet of BAF gets into from the bottom or the top of ozone reactor; Ozone gas feeds from the bottom of ozone reactor; Said ozone gas is through air distribution plate or other distribution device and water uniform mixing in the ozone reactor; The ozone gas ozone reactor of upwards flowing through contacts with water in ozone reactor, and the organic pollutant in the water is removed or transforms; Water after the rough handling flows out from the top or the bottom water outlet of ozone reactor, and ozone tail gas is discharged from the gas discharge outlet of ozone reactor; The water outlet contact reacts time of ozone and BAF is 10~30min in the ozone reactor, ozone dosage 1.0~10mg/L;
(3) water outlet of ozone reactor flows into from the bottom or the top of biological activated carbon reactor drum; The biological activated carbon layer that current are filled in the biological activated carbon reactor drum; Organic pollutant is able to remove by charcoal absorption, biological degradation in the water, and the water after the processing flows out from the other end of biological activated carbon reactor drum; The time that stops in reactor drum through the water after the ozone reactor processing in the biological activated carbon reactor drum is 10~60min.
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CN102633409A (en) * | 2012-04-26 | 2012-08-15 | 复旦大学 | Technological method for controlling disinfection by-product and pathogenic microorganism risk of drinking water |
CN103553270A (en) * | 2013-10-31 | 2014-02-05 | 中国市政工程中南设计研究总院有限公司 | Sewage treatment method and sewage treatment device with middle-arranged ozone reinforced bacteria filter |
CN104150717A (en) * | 2014-08-22 | 2014-11-19 | 同济大学 | Ozone-biological activated carbon combined water treatment simulation experimental device |
CN110921980B (en) * | 2019-11-13 | 2021-10-29 | 河海大学 | Electrochemical enhanced ozone-biological activated carbon water treatment equipment and method for treating water by using same |
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CN201240972Y (en) * | 2008-07-24 | 2009-05-20 | 华南理工大学 | Waste water advanced treatment apparatus combining ozone oxidation and downflow type aerating biological filter pool |
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JP特开平-4271895A 1992.09.28 |
张金松等.O3/BAC对氯化消毒副产物的控制作用.《中国给水排水》.2004,第20卷(第2期), * |
赵海华等.组合工艺在农村饮水工程中的应用.《中国资源综合利用》.2010,第28卷(第2期), * |
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