CN104496124B - Middle water purification treatment system and purifying treatment method - Google Patents
Middle water purification treatment system and purifying treatment method Download PDFInfo
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- CN104496124B CN104496124B CN201410814793.0A CN201410814793A CN104496124B CN 104496124 B CN104496124 B CN 104496124B CN 201410814793 A CN201410814793 A CN 201410814793A CN 104496124 B CN104496124 B CN 104496124B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
- C02F3/1273—Submerged membrane bioreactors
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Biological Treatment Of Waste Water (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Activated Sludge Processes (AREA)
Abstract
The present invention relates to water purification treatment system and middle water purification processing method in one, utilize " ozone-Concha Ostreae biological fixed-bed-membrane bioreactor " integrated technology to process the low concentration municipal middle water containing hardly degraded organic substance or micropollutant water. First with ozone layer destroying hardly degraded organic substance structure so that it is be converted into biodegradable Organic substance; And filler adopt containing a large amount of micropores and trace element, there is bigger serface, microorganism is friendly and biochemistry stability is high Concha Ostreae is filler, build convenient, purify efficiently; Recycling has powerful interception capacity and can reduce the membrane bioreactor of COD and ammonia nitrogen in water further, efficiently solve low concentration municipal middle water or the intractable problem of micropollutant water, COD, ammonia nitrogen, turbidity etc. are had extremely notable treatment effect, Treated sewage reusing is significant.
Description
Technical field
The present invention relates to environment-protective water processing technology field, especially relate to a kind of municipal middle water cleaning treatment system and purifying treatment method.
Background technology
China is one of country that water resource is very poor in the world, and water resources ownership per capita is about 2200m3, it is about the 1/4 of world occupancy volume per person. 668 big and medium-sized cities of China there are 400 cities face water shortage problem, day water deficit about 16,000,000 m3, year water deficit about 6,000,000,000 m3, the city of serious water shortage has 110, and hydropenia has become urban economy development and the restraining factors of people's lives improvement. Municipal middle water reuse solves the good method of water shortage problem just, is the effective way realizing municipal sewage as a resource, operates and proper obtains good social benefit, environmental benefit, economic benefit and economy of resources. Municipal middle water reuse is with the middle water after municipal sewage two stage treatment for former water; need to carry out advanced treating according to required function of water body; supply commercial production (such as boiler feedwater etc.), urban afforestation, municipal water use etc.; both the shortage of water resource had been fed; decrease the consumption of city tap-water; decrease again the sewage quantity discharged to basin, prevented and treated water pollution, protect water body environment.
Current thermal power plant is the main power source of China's industry and socio-economic development, is also water consumption rich and influential family simultaneously, is the supplier of society's clear energy sources, is again the discharge rich and influential family of sewage. The construction of water treatment of power plant reuse facility, is possible not only to save fresh water amount, improves the utilization rate of resource, and can also alleviate environmental pollution. At present, Water of Power Plants advanced treatment process mainly adopts lime coagulation clarification filtration method, membrane biological reaction facture and aeration filtration microfiltration method etc. Municipal middle water reuse has strict standard, urban wastewater treatment firm secondary biochemical effluent must carry out advanced treating and remove nitrogen phosphorus and low-concentration organic, according to " urban wastewater treatment firm pollutant emission standard " (GB18918 2002) requirement, cities and towns water outlet COD (COD) controls at below 50mg/L, BOD controls at below 10mg/L, and ammonia control is at below 5mg/L.Secondary biochemical treatment technique tail water often contain a small amount of ammonia nitrogen, substantial amounts of nitrate nitrogen and left behind hardly degraded organic substance on a small quantity, being belonging to the water body of a kind of typical highly nitrated low C/N ratio. And in the recycled water advanced treatment technique commonly used at present, to this, highly nitrated low C/N is more extremely limited than the disposal ability of water body.
Summary of the invention
Based on this, it is necessary to providing a kind of can carry out, for the municipal middle water of highly nitrated low C/N ratio, the middle water purification treatment system and the purifying treatment method that purify.
Water purification treatment system in one, including:
Biological fixed-bed, including cell body and be located at the filler in described cell body; The height of described filler part is less than the height of described cell body; Described cell body is provided with the part of described filler and offers air inlet and the first water inlet, and is arranged over the first outlet at described filler; Described filler is Concha Ostreae;
Ozone generating-device, connects by described air inlet and described cell body are internal, for passing into ozone in described cell body;
Membrane bioreactor, including reactor and be located at the membrane separation assemblies in described reactor; Described reactor is respectively provided on two sides with the second water inlet and the second outlet at described membrane separation assemblies; Described second water inlet connects with described first outlet; And
Aerator, including air inlet pipe and be located at the gas distribution pipe in described reactor, described gas distribution pipe is located at the lower section of described membrane separation assemblies, and described air inlet pipe connects with described gas distribution pipe.
Wherein in an embodiment, the height of described filler part is described cell body height is 1/3��1/2.
Wherein in an embodiment, the porosity of described filler is 75��85%.
Water purification processing method in one, uses the middle water purification treatment system described in any of the above-described embodiment, and described middle water purification processing method comprises the steps:
Start the biofilm stage: continue 20��30 days, glucose water distribution is added in middle water to be clean, according still further to the water inlet speed that hydraulic detention time is 20��30h, this middle water containing glucose is continually fed into described biological fixed-bed and described membrane bioreactor, and pass into air in described biological fixed-bed and described membrane bioreactor, control dissolved oxygen content and be not less than 2mg/L, start biofilm;
Improve load stage: continue 20��30 days, to the described biological fixed-bed after biofilm and described membrane bioreactor is continually fed into middle water to be clean, and passing into ozone in described biological fixed-bed, the dosage of ozone incrementally increases, and the hydraulic detention time of middle water controls at 10��15h; And
Stable operation stage: middle water to be clean is passed in described biological fixed-bed and described membrane bioreactor, maintain the dissolved oxygen in described biological fixed-bed and described membrane bioreactor within the scope of 4��6mg/L, ozone intake meets ozone/COD=0.5��1, and to keep hydraulic detention time in described biological fixed-bed be 4��8h, the hydraulic detention time in described membrane bioreactor is 2��4h.
Wherein in an embodiment, the weight percentage of the described middle aqueous humor glucose containing glucose is 1%.
Wherein in an embodiment, described being incrementally increased by the dosage of ozone is, according to every 3��5 days speed increased once, by 0.04g/L, the dosage of ozone is increased to 0.18g/L, controlled by the power of described ozone generating-device during increase, power is improved 10% every time.
Above-mentioned middle water purification treatment system and purifying treatment method, can be widely used in the field of purification of municipal middle water, the middle water of especially highly nitrated low C/N ratio, in the turbidity of middle water, COD, ammonia nitrogen etc., there is great removal effect, effluent quality is excellent, provides technical support for municipal middle water reuse. This purifying treatment method technological process is shorter, the management low, easily operated of capital construction operating cost, and system easy to be filmed, startup soon, are very suitable for the removal of municipal middle water residual hardly degraded organic substance and ammonia nitrogen.
Accompanying drawing explanation
Fig. 1 is the module diagram of the middle water purification treatment system of an embodiment;
Fig. 2 is the structural representation of biological fixed-bed in Fig. 1;
Fig. 3 is the structural representation of membrane bioreactor and aerator in Fig. 1;
Fig. 4 is the schematic flow sheet of the middle water purification processing method of an embodiment.
Detailed description of the invention
It is described in further detail mainly in combination with the drawings and the specific embodiments middle water purification treatment system to the present invention and middle water purification processing method below.
As it is shown in figure 1, the middle water purification treatment system 10 of an embodiment includes biological fixed-bed 100, ozone generating-device 200, membrane bioreactor 300 and aerator 400. Biological fixed-bed 100 directly connects with membrane bioreactor 300, is formed and runs response system continuously.
Incorporated by reference to Fig. 2, the biological fixed-bed 100 of present embodiment includes cell body 110 and filler 120. Filler 120 is located in cell body 110, is specifically located at the bottom of cell body 110, and namely the height of filler 120 part is less than the height of cell body 110. In the present embodiment, the height of filler 120 part is the 1/3��1/2 of cell body 110 height, to improve the sludge concentration in cell body 110. Cell body 110 top is exposed, and offers air inlet 112 and the first water inlet 114 in the part being provided with filler 120, is arranged over the first outlet 116 at filler 120.
Further, in the present embodiment, filler 120 is Concha Ostreae, can gather abandon or coastal region fisherman or naturally discarded Concha Ostreae etc. to catering industry, and porosity can reach 75��85%. The structure of Concha Ostreae includes horny layer, prismatic layer and nacreous layer, and wherein, major part is the bladed structure of prismatic layer. The prismatic layer of Concha Ostreae contains substantial amounts of micropore, and aperture, at 2��10 ��m, has very strong absorbability. The main component of Concha Ostreae is calcium oxide, has certain hardness and rough surface, and micropore is many, thus has bigger specific surface area. Though Concha Ostreae aspherical, its porosity is big, not easily results in blockage, and biological, stable chemical performance. Additionally, Concha Ostreae is the biological chitin formed in briny environment, thus resistance to high salt corrosion, and there is the rough surface that applicable biology is perched, be conducive to microbe from adhering under high salt conditions, be a kind of microorganism friendly filler. Concha Ostreae as a kind of garbage, its wide material sources, cheap. Therefore, adopt Concha Ostreae to build biological fixed-bed as filler 120, easy to operate, effective and cost is low.
Ozone generating-device 200 connects by air inlet 112 and cell body 110 are internal, for passing into ozone in cell body 110, and provides dissolved oxygen to originate. Ozone generating-device 200 can adopt but the mode such as the electrolysis air that discharges that is not limited to prepares ozone. By passing into ozone in cell body 110, ozone layer destroying hardly degraded organic substance can be utilized, it is made to be converted into biodegradable Organic substance, thus improving the biodegradability of waste water, utilize follow-up process technique, as biological fixed-bed 120 processes, it is possible to absorption, degraded, oxidation and the anabolic effect of the microorganism (such as nitrogen-fixing bacteria, nitrobacteria etc.) by being attached on filler 120, waste water can be carried out advanced treating, degree of depth organics removal and ammonia nitrogen.
Please joining Fig. 3, membrane bioreactor 300 adopts Nets impregnated, including reactor 310 and be located at the membrane separation assemblies 320 in reactor 310. Reactor 310 is respectively provided on two sides with the second water inlet 312 and the second outlet 314 at membrane separation assemblies 320. Second water inlet 312 connects with the first outlet 114. Membrane bioreactor 300 has powerful ability of damming, it is possible to effectively dams for the colloidal substance of residual in water and microorganism, and reduces COD and ammonia nitrogen in water further, protects follow-up reverse osmosis membrane, reduces the microbiologic(al) corrosion of pipeline and equipment. Membrane separation assemblies 320 can replace traditional secondary sedimentation tank to carry out solid-liquid separation, due to the effect of damming of the high degree of mechanical of film, can whole Biomass be dammed in reactor, long mud age and higher suspension solid concentration can be obtained, be conducive to the propagation of poky nitrogen-fixing bacteria and nitrobacteria, it is made without extended aeration and can be achieved with nitrification and denitrification, thus enhancing the digestion power of activated sludge. Membrane separation assemblies 320 can also maintain relatively low organic loading rate (F/M), makes excess sludge yield much smaller than activated sludge process, and system is run more flexibly and stable.
Aerator 400 includes air inlet pipe 410 and the gas distribution pipe 420 being located in reactor 310. Gas distribution pipe 420 is located at the lower section of membrane separation assemblies 320. Air inlet pipe 410 connects with gas distribution pipe 420. Aerator 400 provides oxygen sources for reactor 310, keeps membrane separation assemblies 320 to be in aerobic environment.
Additionally, present embodiment additionally provides water purification processing method in one, as shown in Figure 4, in this, water purification processing method uses above-mentioned middle water purification treatment system 10, comprises the steps:
Step S810: start the biofilm stage: continue 20��30 days, glucose water distribution is added in middle water to be clean, according still further to the water inlet speed that hydraulic detention time is 20��30h (such as 25h etc.), this middle water containing glucose is continually fed into biological fixed-bed and membrane bioreactor, and pass into air in biological fixed-bed and membrane bioreactor, control dissolved oxygen content and be not less than 2mg/L, start biofilm.
In this stage, in middle water to be clean, add glucose to the weight percentage of the middle aqueous humor glucose containing glucose reach 1%.
Step S820: improve load stage: continue 20��30 days, to the biological fixed-bed after biofilm and membrane bioreactor is continually fed into middle water to be clean, and pass into ozone in biological fixed-bed, the dosage of ozone incrementally increases, the hydraulic detention time of middle water controls at 10��15h, such as 12h etc.
In the present embodiment, described being incrementally increased by the dosage of ozone is, according to every 3��5 days speed increased once, by 0.04g/L, the dosage of ozone is increased to 0.18g/L, controlled by the power of ozone generating-device 200 during increase, power is improved 10% every time.
Step S830: stable operation stage: middle water to be clean is passed in biological fixed-bed and membrane bioreactor, maintain the dissolved oxygen in biological fixed-bed and membrane bioreactor within the scope of 4��6mg/L, ozone intake meets ozone/COD=0.5��1, and to keep hydraulic detention time in biological fixed-bed be 4��8h, the hydraulic detention time in membrane bioreactor is 2��4h.
In one embodiment, the middle water purification treatment system of the application of the invention and middle water purification processing method, Chikan District, Zhanjiang City municipal wastewater plant effluent is carried out purified treatment, runs 4 months continuously, after testing, result is as shown in table 1 below.
Table 1
| Project | Water inlet | Water outlet | Average removal rate |
| pH | 6.9��7.2 | 7.4��7.8 | �� |
| Turbidity (NTU) | 2��5 | 0.1��0.4 | 80%��98% |
| COD(mg/L) | 20��40 | 4��8 | 60%��90% |
| Ammonia nitrogen (mg/L) | 3��5 | 0.1��0.2 | 93%��98% |
Above-mentioned middle water purification treatment system and purifying treatment method, can be widely used in the field of purification of municipal middle water, the middle water of especially highly nitrated low C/N ratio, in the turbidity of middle water, COD, ammonia nitrogen etc., there is great removal effect, effluent quality is excellent, provides technical support for municipal middle water reuse. This purifying treatment method technological process is shorter, the management low, easily operated of capital construction operating cost, and system easy to be filmed, startup soon, are very suitable for the removal of municipal middle water residual hardly degraded organic substance and ammonia nitrogen.
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention. It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention. Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (3)
1. water purification processing method in a kind, it is characterised in that water purification treatment system in use, in this, water purification treatment system includes:
Biological fixed-bed, including cell body and be located at the filler in described cell body; The height of described filler part is less than the height of described cell body; Described cell body is provided with the part of described filler and offers air inlet and the first water inlet, and is arranged over the first outlet at described filler; Described filler is Concha Ostreae;
Ozone generating-device, connects by described air inlet and described cell body are internal, for passing into ozone in described cell body;
Membrane bioreactor, including reactor and be located at the membrane separation assemblies in described reactor; Described reactor is respectively provided on two sides with the second water inlet and the second outlet at described membrane separation assemblies; Described second water inlet connects with described first outlet; And
Aerator, including air inlet pipe and be located at the gas distribution pipe in described reactor, described gas distribution pipe is located at the lower section of described membrane separation assemblies, and described air inlet pipe connects with described gas distribution pipe;
Described middle water purification processing method comprises the steps:
Start the biofilm stage: continue 20��30 days, glucose water distribution is added in middle water to be clean, according still further to the water inlet speed that hydraulic detention time is 20��30h, this middle water containing glucose is continually fed into described biological fixed-bed and described membrane bioreactor, and pass into air in described biological fixed-bed and described membrane bioreactor, control dissolved oxygen content and be not less than 2mg/L, start biofilm;
Improve load stage: continue 20��30 days, to the described biological fixed-bed after biofilm and described membrane bioreactor is continually fed into middle water to be clean, and passing into ozone in described biological fixed-bed, the dosage of ozone incrementally increases, and the hydraulic detention time of middle water controls at 10��15h; And
Stable operation stage: middle water to be clean is passed in described biological fixed-bed and described membrane bioreactor, maintain the dissolved oxygen in described biological fixed-bed and described membrane bioreactor within the scope of 4��6mg/L, ozone intake meets ozone/COD=0.5��1, and to keep hydraulic detention time in described biological fixed-bed be 4��8h, the hydraulic detention time in described membrane bioreactor is 2��4h.
2. middle water purification processing method as claimed in claim 1, it is characterised in that the weight percentage of the described middle aqueous humor glucose containing glucose is 1%.
3. middle water purification processing method as claimed in claim 1, it is characterized in that, the dosage of described ozone incrementally increases, it is, according to every 3��5 days speed increased once, the dosage of ozone is increased to 0.18g/L by 0.04g/L, controlled by the power of described ozone generating-device during increase, improve 10% every time.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786764A (en) * | 2010-01-29 | 2010-07-28 | 华南理工大学 | Reclaimed water recovery treatment method and device |
| CN101948173A (en) * | 2010-08-25 | 2011-01-19 | 深圳市碧园环保技术有限公司 | Composite filler for biological aerated filter and biological filter structure |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101786764A (en) * | 2010-01-29 | 2010-07-28 | 华南理工大学 | Reclaimed water recovery treatment method and device |
| CN101948173A (en) * | 2010-08-25 | 2011-01-19 | 深圳市碧园环保技术有限公司 | Composite filler for biological aerated filter and biological filter structure |
Non-Patent Citations (2)
| Title |
|---|
| BAF /MBＲ 组合工艺处理城镇污水的效能;高伟业等;《中国给水排水》;20140930;第30卷(第17期);1.1 * |
| O3/BAF工艺用于石化污水厂二级出水深度处理的试验研究;高祯;《中国优秀硕士学位论文全文数据库 工程科技I辑》;20140415(第4期);第58页 * |
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Inventor after: Liu Shinian Inventor after: Chen Yu Inventor after: Zhong Jianhui Inventor after: Yan Jia Inventor after: Hu Yongyou Inventor after: Chen Junfeng Inventor after: Wei Zengfu Inventor after: Li Xin Inventor after: Hong Tian Inventor after: Lv Wangyan Inventor after: Chen Wenzhong Inventor before: Liu Shinian Inventor before: Yan Jia Inventor before: Wei Zengfu Inventor before: Hu Yongyou Inventor before: Li Xin Inventor before: Chen Junfeng Inventor before: Hong Tian Inventor before: Lv Wangyan |
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Effective date of registration: 20151209 Address after: 510640 Tianhe District, Guangdong, No. five road, No. 381, Applicant after: South China University of Technology Applicant after: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Applicant after: Zhanjiang Sino Guangdong Energy Co., Ltd. Address before: 510080 Dongfeng East Road, Dongfeng, Guangdong, Guangzhou, Zhejiang Province, No. 8 Applicant before: ELECTRIC POWER RESEARCH INSTITUTE, GUANGDONG POWER GRID CO., LTD. Applicant before: South China University of Technology |
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