CN1328190C - Biological purifying process of seriously polluted river water - Google Patents
Biological purifying process of seriously polluted river water Download PDFInfo
- Publication number
- CN1328190C CN1328190C CNB2005100385202A CN200510038520A CN1328190C CN 1328190 C CN1328190 C CN 1328190C CN B2005100385202 A CNB2005100385202 A CN B2005100385202A CN 200510038520 A CN200510038520 A CN 200510038520A CN 1328190 C CN1328190 C CN 1328190C
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- Prior art keywords
- water
- tank
- seriously polluted
- polluted river
- back flushing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The present invention relates to a biological purifying process of seriously polluted river water. Two-stage water treatment process is utilized, wherein the first stage is the technology of an aeration biological filter tank, and the second stage is the oxidation sterilizing technology of chlorine dioxide. The seriously polluted river water is injected onto the bottom of the aeration biological filter tank by regulating a settling tank by a water pump and enters a filter material layer by a long handle filter head in the tank. Simultaneously, the aeration oxygenation is carried out on the filter material layer by a Roots blower. The effluent water enters an oxidation disinfection tank by a backflushing water tank. ClO2 produced by a chlorine dioxide generator and the effluent water of the aeration biological filter tank simultaneously enter the oxidation disinfection tank, and the effluent water achieves the requirements of the common industrial water quality after oxidized and disinfected by the disinfection tank. The present invention has the advantages of construction investment saving, small occupation of land and low operation cost. The treated water can reach the industrial water quality and can serve as the water for use of industrial production. The seriously polluted river water losing the use value can be reused. Sludge generated in the treating process is a high-quality ecology fertilizer.
Description
1, technical field:
The invention belongs to technical field of sewage, be specifically related to a kind of biological purifying process of seriously polluted river water.
2, background technology:
Some suburbs, city of China or to flow to the river in urban district seriously polluted mostly, substantially lose the environmental functional and the functions of use of water, and urban water shortage is serious on the other hand, how these seriously polluted river waters are directly handled, make its resource utilization and be applied to industrial production, opening up new water source for China lack of water city (particularly northern city) industrial development, will be the important subject that the water treatment worker makes great efforts to solve.Conventional handling technology of water supply, i.e. coagulation → clarification → filtration → sterilization process removal object mainly is suspended substance, colloidal impurity and the bacterium in the former water.Owing to a large amount of industrial wastewater discharges cause the river of heavily contaminated, its organic compound and inorganic nutritive element (N, P etc.) content height, conventional water treatment process is difficult to remove these pollution substances, makes these polluted river waters lose utility value.Technologies such as the BAC process that development in recent years is got up, 3-D filler biological contact oxidation metallization processes, membrane technique are having big progress and demonstration project to use aspect the processing micro-polluted source water.But deficiencies such as these technologies all exist, and technical process is complicated, investment and working cost height, floor space are big, its process object only limits to micro-polluted raw simultaneously, then seems powerless for handling seriously polluted river water.
3, summary of the invention:
A kind of new biological purifying process of seriously polluted river water that the objective of the invention is to solve prior art processing seriously polluted river water deficiency and provide, handle seriously polluted river water, make it reach the water quality requirement of industrial application, thereby realize the seriously polluted river water resource utilization, be applied to industrial production, solve the developing lack of water difficult problem of urban industry.
Biological purifying process of seriously polluted river water provided by the present invention, secondary oxidation disinfectant technology after elder generation's employing one-level biopurification, its process flow diagram as shown, concrete technology is as follows: seriously polluted river water is through regulating settling tank 1 is injected BAF 3 by water pump 2 bottom, enter filter material layer through inside, pond strainer head, simultaneously carry out aeration aerating to filter material layer by roots blower 4, water outlet through back flushing pond 5 and line mixer 8 enter oxidation disinfection bath 9; The ClO that chlorine dioxide generator 7 is produced
2Enter oxidation disinfection bath 9 with the BAF water outlet simultaneously through line mixer 8.Effluent quality behind the sterilization pool oxidation disinfection has reached the I grade standard among the surface water GB3838-2002; Combined water and air backwash is adopted in the back flushing of BAF 3, method is: the pressurized air that provides with roots blower 4 earlier carries out the 5min back flushing, restart backwash pump 6, air water back flushing simultaneously 5min, last water is turned one's coat and is washed 5min～8min, and backwash water adopts the treat effluent of BAF 3; Impurity such as the microbial film that back flushing comes off, mud are back to the back flushing draining and regulate settling tank 1, and the mud of precipitation is through concentration basin 10,11 one-tenth fertile mud cake outward transports of plate-and-frame filter press, concentration basin concentrated solution, plate-and-frame filter press pressing filtering liquid readjustment joint settling tank 1.
BAF filter material layer filling high porosity, high-specific surface area, particle diameter are 3mm-5mm lytag filtrate, and its specification is particle diameter 3mm-5mm, tap density 0.89g/cm
3, percentage of damage 0.07%, specific surface area 4.8m
2/ g, porosity 35%, wear rate 5.3%, hydrochloric acid soluble rate 0.5%.
The processing parameter of using this art breading seriously polluted river water is: gas-water ratio 0.5～1.0, backwashing period are 3d～5d, gas, water associating back flushing, and back washing strength is 5L/ (m
2S)～8L/ (m
2S), backwashing time is 10min～15min, 15 ℃～30 ℃ of temperature, pH value 7.0～8.5, sludge loading 0.2kgCOD
Mn/ (kgMLSSd)～0.6kgCOD
Mn/ (kgMLSSd), filtering velocity 1.5m
3/ (hm
2)～4.5m
3/ (hm
2), ClO
2Dosage 1.8g/m
3Under this processing parameter, it (is COD to the turbidity in the seriously polluted river water, permanganate index
Mn), the average removal rate of ammonia nitrogen, bacterium reaches respectively more than 95%, 90%, 95% and 99.5%, effluent quality has reached the I grade standard in the elementary item target limit value in the water environment quality standard (GB3838-2002), can realize the seriously polluted river water resource utilization directly as industrial process waters.
The key of this technology is to utilize the lytag filtrate of high-specific surface area of BAF inner filling and the microbial film of apposition growth thereof to be treatment media, give full play to the physical adsorption effect and the interior multistage predation of food of reactor of biological metabolism effect, physical filtering effect, film and film and filler, realization pollutent and bacterium are removed in same unitary reactor.Exist different aerobic, anoxic zones in the reactor, can realize nitrated, denitrification synchronously, removing the organic purpose that reaches denitrogenation dephosphorizing simultaneously.
The present invention has construction investment and economizes, take up an area of few, working cost is low, treating water can reach process water water quality, can be used as industrial process waters, realized the resource utilization of seriously polluted river water, the mud that produces in the treating processes is the high-quality ecological fertilizer, thereby overcome above-mentioned defective of giving water technology, for new water source has been opened up in China lack of water city (particularly northern city) industrial development.Day to handle 150000m
3Industry water factory is an example, and is if handle seriously polluted river water by traditional coagulation → clarification → filtration → sterilization process, up to standard for making water quality treatment, also need add active carbon absorption technology, about 1.2 hundred million yuans of its total investment of engineering takes up an area of 120 mu, directly the about 0.8 yuan/m of working cost
3, and sludge disposal, gac recover difficulty of regeneration.If adopt the present invention, adopt one-level BAF biopurification processing and secondary dioxide peroxide oxidation disinfection process combined technology, can make construction investment reduce to 0.9 hundred million yuans, only taking up an area of needs 80 mu, the about 0.65 yuan/m of working cost
3, the mud cake of processing is a high-quality green ecological fertilizer.The present invention compares with traditional coagulation → clarification → filtration → sterilization process has following advantage:
1. construction investment is economized, and only is the latter's 75%.
2. taking up an area of and lack, only is the latter's 67%.
3. working cost is low, and promptly the operational management cost is low, only is the latter's 81%.
4. effluent quality is good, can the seriously polluted river water that lose use value be utilized again directly as industrial process waters, has realized waste water reclaiming.
5. the mud that produces in the treating processes is the high-quality ecological fertilizer, can be used as farmland fertilizer or improves the soil, and develops eco-agriculture.
4, description of drawings:
Accompanying drawing: biological purifying process of seriously polluted river water schematic flow sheet
Numeral among the figure: 1-regulates settling tank; The 2-water pump; The 3-BAF; The 4-roots blower; 5-back flushing pond; The 6-backwash pump; The 7-chlorine dioxide generator; The 8-line mixer, the 9-oxidation disinfection bath; The 10-sludge thickener; The 11-plate-and-frame filter press
5, embodiment:
Planar dimension is R=8000mm, height H
0In the circular BAF of=6500mm, be filled with and highly be the ceramic grain filter of H=4000mm, the height h of distributing water room
1=1000mm, supporting layer height h
2=300mm, clear water zone height h
3=800mm, superelevation h
4=400mm is as sludge loading 0.35kgCOD
Mn/ (kgMLSSd), filtering velocity 2.5m
3/ (hm
2), dioxide peroxide dosage 1.6g/m
3, gas-water ratio 5: 1 o'clock can be with 3000m
3The turbidity of the seriously polluted river water of/d is reduced to 4.0FTU from 113.0FTU, COD
MnReduce to 3.9mg/L from 65.4mg/L, ammonia nitrogen is reduced to 0.16mg/L from 2.4mg/L, and the bacterium number is from 1.6 * 10
4Individually reduce to 1.0 * 10
2Individual.Table 1 is for adopting several embodiment of this art breading seriously polluted river water.
Table 1 adopts biological clarification to handle seriously polluted river water effect embodiment
| Embodiment | Turbidity (FTU) | COD Mn/(mg/L) | Ammonia nitrogen (mg/L) | Bacterium (individual) | ||||||||
| Water inlet | Water outlet | Clearance (%) | Water inlet | Water outlet | Clearance (%) | Water inlet | Water outlet | Clearance % | Water inlet | Water outlet | Clearance (%) | |
| 1 | 113 | 4 | 96.5 | 65.4 | 3.9 | 94.0 | 2.4 | 0.16 | 93.6 | 1.6×10 4 | 1.0×10 2 | 99.4 |
| 2 | 134 | 3 | 97.8 | 150.6 | 4.3 | 97.1 | 7.3 | 0.19 | 97.4 | 2.6×10 4 | 2.2×10 2 | 99.2 |
| 3 | 55 | 3 | 94.5 | 46.4 | 3.6 | 92.2 | 6.5 | 0.15 | 97.6 | 2.0×10 4 | 1.5×10 2 | 99.3 |
| 4 | 72 | 2 | 97.2 | 55.3 | 2.5 | 95.5 | 9.7 | 0.49 | 94.9 | 1.7×10 4 | 1.3×10 2 | 99.2 |
| 5 | 86 | 5 | 94.2 | 44.3 | 5.3 | 88.0 | 1.7 | Do not detect | 100 | 2.3×10 4 | 1.1×10 2 | 99.5 |
Claims (1)
1, biological purifying process of seriously polluted river water, it is characterized in that this technology is as follows: seriously polluted river water is through regulating settling tank (1) is injected BAF (3) by water pump (2) bottom, enter filter material layer through inside, pond strainer head, simultaneously carry out aeration aerating by roots blower (4) to filter material layer, water outlet enters oxidation disinfection bath (9) through back flushing pond (5) and line mixer (8); The ClO that chlorine dioxide generator (7) is produced
2Enter oxidation disinfection bath (9) with the BAF water outlet simultaneously through line mixer (8); Effluent quality behind the sterilization pool oxidation disinfection has reached the I grade standard among the surface water GB3838-2002; Combined water and air backwash is adopted in the back flushing of BAF (3), the pressurized air that provides with roots blower (4) earlier carries out the 5min back flushing, restart backwash pump (6), air water back flushing simultaneously 5min, last water is turned one's coat and is washed 5min～8min, and backwash water adopts the treat effluent of BAF (3); Impurity such as the microbial film that back flushing comes off, mud are back to the back flushing draining and regulate settling tank (1), the mud of precipitation becomes fertile mud cake outward transport through concentration basin (10), plate-and-frame filter press (11), concentration basin concentrated solution, plate-and-frame filter press pressing filtering liquid readjustment joint settling tank (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100385202A CN1328190C (en) | 2005-03-23 | 2005-03-23 | Biological purifying process of seriously polluted river water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100385202A CN1328190C (en) | 2005-03-23 | 2005-03-23 | Biological purifying process of seriously polluted river water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1673119A CN1673119A (en) | 2005-09-28 |
| CN1328190C true CN1328190C (en) | 2007-07-25 |
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ID=35045935
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|---|---|---|---|
| CNB2005100385202A Expired - Fee Related CN1328190C (en) | 2005-03-23 | 2005-03-23 | Biological purifying process of seriously polluted river water |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276111A (en) * | 2011-06-08 | 2011-12-14 | 淮安自来水有限公司 | Optimally combined treating method for micro-polluted water sources |
| CN102502972B (en) * | 2011-11-01 | 2013-08-14 | 常州大学 | Method using downflow biological aerated filter to treat algal slurry press filtrate |
| CN102849900B (en) * | 2012-09-14 | 2016-03-09 | 大连格兰清水环境工程有限公司 | Wood working method of wastewater treatment |
| CN106348533B (en) * | 2016-10-09 | 2020-03-06 | 广州市环境保护工程设计院有限公司 | Broken-end surge treatment equipment and treatment process thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002011498A (en) * | 2000-06-28 | 2002-01-15 | Atlas:Kk | Device for treating leachate |
| CN1369440A (en) * | 2002-03-22 | 2002-09-18 | 清华大学 | Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite filler |
-
2005
- 2005-03-23 CN CNB2005100385202A patent/CN1328190C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002011498A (en) * | 2000-06-28 | 2002-01-15 | Atlas:Kk | Device for treating leachate |
| CN1369440A (en) * | 2002-03-22 | 2002-09-18 | 清华大学 | Process for treating sewage with zeolite filler in aerated biologic filter pool and zeolite filler |
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| Publication number | Publication date |
|---|---|
| CN1673119A (en) | 2005-09-28 |
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