CN101838084B - Biochemical regulation and treatment process for sewage of urban domestic garbage transfer station - Google Patents
Biochemical regulation and treatment process for sewage of urban domestic garbage transfer station Download PDFInfo
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- CN101838084B CN101838084B CN2010101829076A CN201010182907A CN101838084B CN 101838084 B CN101838084 B CN 101838084B CN 2010101829076 A CN2010101829076 A CN 2010101829076A CN 201010182907 A CN201010182907 A CN 201010182907A CN 101838084 B CN101838084 B CN 101838084B
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Abstract
The invention relates to a biochemical regulation and treatment process for the sewage of an urban domestic garbage transfer station, which comprises the following procedures that: the sewage of the garbage transfer station flows into a biochemical regulation tank to carry out an anaerobic reaction, oil removal and sand setting are realized, and an organic load is lowered; then, the sewage flows into a coagulative precipitation tank after the sewage is mixed with an added composite flocculating agent, and suspended matters and grease are removed; afterwards, the sewage flows into an acidification tank, and ferrous sulfate and an acid solution are added to enable the pH value of water to be 2 to 4; the acidified water flows into an oxidation tank and carries out an oxidation reaction with an oxidant, the ferrous sulfate is oxidated into ferric iron, and an organic pollutant is removed; then, the water flows into a neutralization tank and carries out a neutralization reaction with lye, and the pH value is regulated to be 7 to 8; and finally, the water flows into an inclined-plate sedimentation tank, and the residual ferrous sulfate and the residual ferric iron are settled to obtain the purified water. The process has the characteristic and effect of removing more than 70 percent of chemical oxygen demand, more than 95 percent of suspended matters and more than 80 percent of grease in the sewage of the urban garbage transfer station.
Description
Technical field
The present invention relates to a kind of sewage treatment process, particularly a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station.
Background technology
Urban domestic garbage transfer station is the important pivot in the domestic waste collecting and transferring system as a binding site that connects rubbish source of generation and terminal disposal system.The secondary pollutions such as sewage that transfer point produces in operation process have become the focus of public attention.The sewage main source that refuse transfer station produces has: the percolate that produces in the rubbish compression process; The flushing sewage on vehicle, equipment, road surface; Worker's sanitary sewage.Transfer point sewage generation is less relatively, has Pollutant levels height, complicated component, water quality and quantity variation characteristics greatly jointly with the landfill yard percolate.
Transfer point sewage is generally khaki color or brown liquid, and with fetor; Transfer point sewage impurity is more, and the suspension content height also has the bigger rubbish fragment of volume usually; Organic loading is very high, and fetor is arranged; Sewage pH value is about 6 and is acid, and equipment and pipeline are had stronger corrosive nature; Transfer point sewage also contains a large amount of greases, easy blocking pipe not only, and cause for the subsequent disposal of municipal sewage plant to have a strong impact on.Compare with the sewage quality standard that enters municipal sewage system, the main COD of contamination index (chemical oxygen demand (COD)) exceeds tens of times of standards even hundreds of times, is the important city point-source pollution that needs to be resolved hurrily.
The treatment process of conventional garbage transfer point sewage enters the municipal sewage plant for taking over, and mixes common the processing with other sewage of city.Its outstanding problem is: because transfer point sewage has very high Pollutant levels, can be to sewage work's load that impacts, when serious even influence sewage work and normally move, a large amount of greases in the transfer point sewage also can move the sewage disposal plant and have a negative impact; Problem such as colourity, stench is difficult to solve with ordinary method.Therefore, transfer point to sewage carry out efficiently, pre-treatment fast, be the key link that solves the refuse transfer station sewage handling problem.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station, have characteristics flexible, quick, the low-cost processes sewage of urban domestic garbage transfer station, water meter after the purification is seen transparent clarification does not have muddiness, do not have and obviously smell flavor, sensory properties is good.
In order to achieve the above object, the technical solution used in the present invention is:
A kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station comprises following technical process:
The first step: city garbage station sewage 1 at first flows into the biochemical equalizing tank 2 that adopts the traverse baffle form, carries out anaerobic reaction, realizes oil removal, sand setting and reduction organic loading;
Second step: after the composite flocculation agent 10 400mg-600mg/L dissolving according to dosage by the polyacrylamide proportioning of the polymerize aluminum chloride that accounts for gross weight 90% and 10%, by the vacuum take-off effect between water sprayer nozzle and the trunnion composite flocculation agent 10 is sucked, inject the water after biochemical equalizing tank 2 is regulated simultaneously, mix the back and flow into coagulative precipitation tank 3, remove suspended substance and grease, realize that flocculation sediment forms mud, mud uses the mode of gravity spoil disposal, discharges by the sludge valve on the coagulative precipitation tank 3;
The 3rd step: after the water behind removal suspended substance and the grease flows into acidification pool 4, adding concentration to acidification pool 4 by the dosage of 0.05-0.08mol/L is 10% ferrous sulfate 14 solution, and add the acid solution 11 that composition is weight ratio 10% dilute sulphuric acid or dilute hydrochloric acid, guarantee that the desired pH value of subsequent chemistry oxygenizement is between 2-4;
The 4th step: the water after the acidifying flows into oxidation pond 5, adding composition to oxidation pond 5 is that the oxygenant 12 of weight ratio 27.5% hydrogen peroxide carries out oxidizing reaction, hydrogen peroxide and ferrous sulfate 14 molar ratios are 1-5, hydraulic detention time 2-4 hour, ferrous sulfate 14 is oxidized to ferric iron after the oxidizing reaction, realize the oxidation removal of high concentration organic contaminant, cancellation sewage colourity and stench;
The 5th step: water after oxidizing reaction flows into neutralization tank 6, and to add composition be that to carry out neutralization reaction be 7-8 to regulate the pH value for the alkali lye 13 of weight ratio 10% sodium hydroxide solution;
The 6th step: flow into inclined-plate clarifying basin 7 at last, make unreacted completely ferrous sulfate 14 and ferric iron precipitate, the water 8 after being purified is gone into municipal pipe network 9 side by side.
Because the present invention has designed biochemical equalizing tank 2, coagulative precipitation tank 3, acidification pool 4, oxidation pond 5, neutralization tank 6 and inclined-plate clarifying basin 7 technical process, therefore use and the invention has the beneficial effects as follows: can remove the COD (chemical oxygen demand (COD)) more than 70% in the city garbage station sewage 1, remove the suspended substance more than 95%, remove the grease more than 80%, significantly improve the vision proterties of refuse transfer station sewage 1 tawny, brownish black, water 8 apparent transparent clarifications after the purification do not have muddiness, do not have and obviously smell flavor, sensory properties is good.In addition, the present invention can better solve the higher increase Sewage Plant of refuse transfer station sewage 1 organic contamination concentration burden, the high equipment that influences of fat content normally moves, colourity and stink are difficult to problems such as ordinary method processing, remedied the deficiency that traditional direct adapter merges the sanitary sewage disposal mode preferably, and take up an area of little, simple in structure, operation convenience, processing cost per ton only is about 20 yuan.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to accompanying drawing, a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station:
The first step: city garbage station sewage 1 at first flows into the biochemical equalizing tank 2 that adopts the traverse baffle form, carries out anaerobic reaction, realizes oil removal, sand setting and reduction organic loading;
Second step: after the composite flocculation agent 10 400mg-600mg/L dissolving according to dosage by the polyacrylamide proportioning of the polymerize aluminum chloride that accounts for gross weight 90% and 10%, by the vacuum take-off effect between water sprayer nozzle and the trunnion composite flocculation agent 10 is sucked, inject the water after biochemical equalizing tank 2 is regulated simultaneously, mix the back and flow into coagulative precipitation tank 3, remove suspended substance and grease, realize that flocculation sediment forms mud, mud uses the mode of gravity spoil disposal, discharges by the sludge valve on the coagulative precipitation tank 3;
The 3rd step: after the water behind removal suspended substance and the grease flows into acidification pool 4, adding concentration to acidification pool 4 by the dosage of 0.05-0.08mol/L is 10% ferrous sulfate 14 solution, and add the acid solution 11 that composition is weight ratio 10% dilute sulphuric acid or dilute hydrochloric acid, guarantee that the desired pH value of subsequent chemistry oxygenizement is between 2-4;
The 4th step: the water after the acidifying flows into oxidation pond 5, adding composition to oxidation pond 5 is that the oxygenant 12 of weight ratio 27.5% hydrogen peroxide carries out oxidizing reaction, hydrogen peroxide and ferrous sulfate 14 molar ratios are 1-5, hydraulic detention time 2-4 hour, ferrous sulfate 14 is oxidized to ferric iron after the oxidizing reaction, realize the oxidation removal of high concentration organic contaminant, cancellation sewage colourity and stench;
The 5th step: water after oxidizing reaction flows into neutralization tank 6, and to add composition be that to carry out neutralization reaction be 7-8 to regulate the pH value for the alkali lye 13 of weight ratio 10% sodium hydroxide solution;
The 6th step: flow into inclined-plate clarifying basin 7 at last, make unreacted completely ferrous sulfate 14 and ferric iron precipitate, the water 8 after being purified is gone into municipal pipe network 9 side by side.
In the accompanying drawing: 1 is refuse transfer station sewage; 2 is biochemical equalizing tank; 3 is coagulative precipitation tank; 4 is acidification pool; 5 is oxidation pond; 6 is neutralization tank; 7 is inclined-plate clarifying basin; 8 are the water after purifying; 9 is city planting ductwork; 10 is composite flocculation agent; 11 is acid solution; 12 is oxygenant; 13 is alkali lye; 14 is ferrous sulfate.
Embodiment one:
The first step: city garbage station sewage 1 at first flows into the biochemical equalizing tank 2 that adopts the traverse baffle form, carries out anaerobic reaction, realizes oil removal, sand setting and reduction organic loading;
Second step: after the composite flocculation agent 10 400mg/L dissolving according to dosage by the polyacrylamide proportioning of the polymerize aluminum chloride that accounts for gross weight 90% and 10%, by the vacuum take-off effect between water sprayer nozzle and the trunnion composite flocculation agent 10 is sucked, inject the water after biochemical equalizing tank 2 is regulated simultaneously, mix the back and flow into coagulative precipitation tank 3, remove suspended substance and grease, realize that flocculation sediment forms mud, mud uses the mode of gravity spoil disposal, discharges by the sludge valve on the coagulative precipitation tank 3;
The 3rd step: after the water behind removal suspended substance and the grease flows into acidification pool 4, adding concentration to acidification pool 4 by the dosage of 0.05mol/L is 10% ferrous sulfate 14 solution, and add the acid solution 11 that composition is weight ratio 10% dilute sulphuric acid or dilute hydrochloric acid, guarantee that the desired pH value of subsequent chemistry oxygenizement is between 2-4;
The 4th step: the water after the acidifying flows into oxidation pond 5, adding composition to oxidation pond 5 is that the oxygenant 12 of weight ratio 27.5% hydrogen peroxide carries out oxidizing reaction, hydrogen peroxide and ferrous sulfate 14 molar ratios are 1, hydraulic detention time 2-4 hour, ferrous sulfate 14 is oxidized to ferric iron after the oxidizing reaction, realize the oxidation removal of high concentration organic contaminant, cancellation sewage colourity and stench;
The 5th step: water after oxidizing reaction flows into neutralization tank 6, and to add composition be that to carry out neutralization reaction be 7-8 to regulate the pH value for the alkali lye 13 of weight ratio 10% sodium hydroxide solution;
The 6th step: flow into inclined-plate clarifying basin 7 at last, make unreacted completely ferrous sulfate 14 and ferric iron precipitate, the water 8 after being purified is gone into municipal pipe network 9 side by side.
Embodiment two:
The first step: city garbage station sewage 1 at first flows into the biochemical equalizing tank 2 that adopts the traverse baffle form, carries out anaerobic reaction, realizes oil removal, sand setting and reduction organic loading;
Second step: after the composite flocculation agent 10 500mg/L dissolving according to dosage by the polyacrylamide proportioning of the polymerize aluminum chloride that accounts for gross weight 90% and 10%, by the vacuum take-off effect between water sprayer nozzle and the trunnion composite flocculation agent 10 is sucked, inject the water after biochemical equalizing tank 2 is regulated simultaneously, mix the back and flow into coagulative precipitation tank 3, remove suspended substance and grease, realize that flocculation sediment forms mud, mud uses the mode of gravity spoil disposal, discharges by the sludge valve on the coagulative precipitation tank 3;
The 3rd step: after the water behind removal suspended substance and the grease flows into acidification pool 4, adding concentration to acidification pool 4 by the dosage of 0.065mol/L is 10% ferrous sulfate 14 solution, and add the acid solution 11 that composition is weight ratio 10% dilute sulphuric acid or dilute hydrochloric acid, guarantee that the desired pH value of subsequent chemistry oxygenizement is between 2-4;
The 4th step: the water after the acidifying flows into oxidation pond 5, adding composition to oxidation pond 5 is that the oxygenant 12 of weight ratio 27.5% hydrogen peroxide carries out oxidizing reaction, hydrogen peroxide and ferrous sulfate 14 molar ratios are 3, hydraulic detention time 2-4 hour, ferrous sulfate 14 is oxidized to ferric iron after the oxidizing reaction, realize the oxidation removal of high concentration organic contaminant, cancellation sewage colourity and stench;
The 5th step: water after oxidizing reaction flows into neutralization tank 6, and to add composition be that to carry out neutralization reaction be 7-8 to regulate the pH value for the alkali lye 13 of weight ratio 10% sodium hydroxide solution;
The 6th step: flow into inclined-plate clarifying basin 7 at last, make unreacted completely ferrous sulfate 14 and ferric iron precipitate, the water 8 after being purified is gone into municipal pipe network 9 side by side.
Embodiment three:
The first step: city garbage station sewage 1 at first flows into the biochemical equalizing tank 2 that adopts the traverse baffle form, carries out anaerobic reaction, realizes oil removal, sand setting and reduction organic loading;
Second step: after the composite flocculation agent 10 600mg/L dissolving according to dosage by the polyacrylamide proportioning of the polymerize aluminum chloride that accounts for gross weight 90% and 10%, by the vacuum take-off effect between water sprayer nozzle and the trunnion composite flocculation agent 10 is sucked, inject the water after biochemical equalizing tank 2 is regulated simultaneously, mix the back and flow into coagulative precipitation tank 3, remove suspended substance and grease, realize that flocculation sediment forms mud, mud uses the mode of gravity spoil disposal, discharges by the sludge valve on the coagulative precipitation tank 3;
The 3rd step: after the water behind removal suspended substance and the grease flows into acidification pool 4, adding concentration to acidification pool 4 by the dosage of 0.08mol/L is 10% ferrous sulfate 14 solution, and add the acid solution 11 that composition is weight ratio 10% dilute sulphuric acid or dilute hydrochloric acid, guarantee that the desired pH value of subsequent chemistry oxygenizement is between 2-4;
The 4th step: the water after the acidifying flows into oxidation pond 5, adding composition to oxidation pond 5 is that the oxygenant 12 of weight ratio 27.5% hydrogen peroxide carries out oxidizing reaction, hydrogen peroxide and ferrous sulfate 14 molar ratios are 5, hydraulic detention time 2-4 hour, ferrous sulfate 14 is oxidized to ferric iron after the oxidizing reaction, realize the oxidation removal of high concentration organic contaminant, cancellation sewage colourity and stench;
The 5th step: water after oxidizing reaction flows into neutralization tank 6, and to add composition be that to carry out neutralization reaction be 7-8 to regulate the pH value for the alkali lye 13 of weight ratio 10% sodium hydroxide solution;
The 6th step: flow into inclined-plate clarifying basin 7 at last, make unreacted completely ferrous sulfate 14 and ferric iron precipitate, the water 8 after being purified is gone into municipal pipe network 9 side by side.
Claims (10)
1. a biochemical regulation and treatment process for sewage of urban domestic garbage transfer station is characterized in that, comprises following technical process:
The first step: sewage of urban domestic garbage transfer station (1) at first flows into biochemical equalizing tank (2), carries out anaerobic reaction, realizes oil removal, sand setting and reduction organic loading;
Second step: after composite flocculation agent (10) dissolving, by the vacuum take-off effect between water sprayer nozzle and the trunnion composite flocculation agent (10) is sucked, inject the water after biochemical equalizing tank (2) is regulated simultaneously, mix the back and flow into coagulative precipitation tank (3), remove suspended substance and grease, realize that flocculation sediment forms mud, mud uses the mode of gravity spoil disposal, discharge by the sludge valve on the coagulative precipitation tank (3), described composite flocculation agent (10) is formulated by the polyacrylamide of the polymerize aluminum chloride that accounts for gross weight 90% and 10%;
The 3rd step: the water behind removal suspended substance and the grease adds ferrous sulfate (14) solution to acidification pool (4), and adds acid solution (11) after flowing into acidification pool (4), guarantees that the desired pH value of subsequent chemistry oxygenizement is between 2-4;
The 4th step: the water after the acidifying flows into oxidation pond (5), add oxygenant (12) to oxidation pond (5) and carry out oxidizing reaction, ferrous sulfate after the oxidizing reaction (14) is oxidized to ferric iron, realizes the oxidation removal of high concentration organic contaminant, cancellation sewage colourity and stench;
The 5th step: water after oxidizing reaction flows into neutralization tank (6), and adding alkali lye (13), to carry out neutralization reaction be 7-8 to regulate the pH value;
The 6th step: flow into inclined-plate clarifying basin (7) at last, make unreacted completely ferrous sulfate (14) and ferric iron precipitate, the water after being purified (8) is gone into municipal pipe network (9) side by side.
2. a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station according to claim 1 is characterized in that: biochemical equalizing tank (2) adopts the traverse baffle form.
3. a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station according to claim 1 is characterized in that: composite flocculation agent (10) is formed by the polyacrylamide proportioning of the polymerize aluminum chloride that accounts for gross weight 90% and 10%.
4. according to claim 1 or 3 described a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station, it is characterized in that: composite flocculation agent (10) 400mg-600mg/L dissolving according to dosage water back and after biochemical equalizing tank (2) is regulated mixes.
5. a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station according to claim 1 is characterized in that: adding concentration by the dosage of 0.05-0.08mol/L is 10% ferrous sulfate (14) solution.
6. a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station according to claim 1 is characterized in that: the composition of acid solution (11) is weight ratio 10% dilute sulphuric acid or dilute hydrochloric acid.
7. a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station according to claim 1 is characterized in that: the composition of oxygenant (12) is weight ratio 27.5% hydrogen peroxide.
8. a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station according to claim 7 is characterized in that: hydrogen peroxide and ferrous sulfate (14) molar ratio is 1-5.
9. a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station according to claim 1 is characterized in that: the hydraulic detention time 2-4 in the oxidation pond (5) hour.
10. a kind of biochemical regulation and treatment process for sewage of urban domestic garbage transfer station according to claim 1 is characterized in that: the composition of alkali lye (13) is weight ratio 10% sodium hydroxide solution.
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| CN105236676A (en) * | 2015-10-14 | 2016-01-13 | 安徽省绿巨人环境技术有限公司 | Domestic sewage treatment and recovery device and method |
| CN109553219A (en) * | 2018-12-29 | 2019-04-02 | 四川磊蒙机械设备有限公司 | A kind of method for sludge treatment for sewage treatment plant |
| CN111569625A (en) * | 2020-05-08 | 2020-08-25 | 北京建工环境修复股份有限公司 | System and method for in-situ removing and purifying peculiar smell in pesticide polluted site |
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| US20040112836A1 (en) * | 2002-12-11 | 2004-06-17 | Manz David Harold | Oil and gas well fracturing (frac) water treatment process |
| CN1631818A (en) * | 2003-12-23 | 2005-06-29 | 何义亮 | Organic waste water treatment process |
| CN1323956C (en) * | 2004-12-01 | 2007-07-04 | 南京大学 | Combined effluent treating process of photooxidizing Fenton's reaction, flocculation and microbial degradation |
| CN101659493A (en) * | 2008-08-27 | 2010-03-03 | 张飞虎 | Method for treating printing and dyeing wastewater |
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