CN104944699A - Method for removing substances generating foul odor in waste water of grease factory - Google Patents
Method for removing substances generating foul odor in waste water of grease factory Download PDFInfo
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- CN104944699A CN104944699A CN201510324670.3A CN201510324670A CN104944699A CN 104944699 A CN104944699 A CN 104944699A CN 201510324670 A CN201510324670 A CN 201510324670A CN 104944699 A CN104944699 A CN 104944699A
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Abstract
The invention discloses a method for removing substances generating foul odor in waste water of a grease factory, and belongs to the technical field of environment protection. The method comprises the following steps: equipping a device for removing substances generating foul odor in waste water of the grease factory; conveying waste water of the grease factory into a bioreactor from the bottom of the bioreactor through a closed pipeline, putting nitrate into the waste water while the waste water enters the bioreactor, starting a stirrer in the bioreactor for stirring, carrying out biological reaction treatment to control the concentration of dissolved oxygen in the bioreactor to be 0.2 mg/L or below, and adopting sludge returning by the bioreactor to control the sludge concentration in the bioreactor to be 2000-6000 mg/L and the sludge return ratio to be 50-150%; discharging the treated waste water into a vertical-flow sedimentation tank from the upper part of the bioreactor to be precipitated, and discharging water in the sedimentation tank into follow-up treatment facilities in an overflow manner to be continuously treated. Through the adoption of the method, rancidity-containing substances in treated waste water are degraded during the treatment process, and rancidity is hardly generated in treated waste water, so that the atmospheric environment is protected.
Description
Technical field
The present invention relates to the removal technology of sewage foul odour material, particularly relate to the minimizing technology of a kind of grease factory waste water foul odour material, belong to environmental protection technical field.
Background technology
The waste water that grease factory produces is mainly from rinse water, grease washes, job shop machine cleaning and ground flushing water etc. before processing.This type of waste component is complicated, mainly containing materials such as Chinese honey locust, phosphatide, protein, oil, pigments, has the features such as organic contamination substrate concentration is high, oleaginousness is large, impurity is many, and comparatively large to environmental hazard, intractability is higher.In addition, such waste water, due to the volatile organic compound matter containing high density, has strong pungent rancidity, makes a very bad impression to atmospheric environment.The foul odour of grease factory waste water primarily of grease oxidation, becoming sour causes, the kind of foul odour material is mainly small molecules aldehyde, ketone and the oxide compound such as carboxylic acid, alcohols, superoxide.
The treatment process of current grease factory waste water more often adopts " air supporting+anaerobic process+aerobic method ", and such processing method has achieved good effect in the control of waste water quality, but ignores the foul odour problem of grease factory waste water generation.Oil wastewater has strong rancidity, and volatile, adhesivity is larger.Air supporting and aerobic method can make the volatile organic matter in oil wastewater spill in air, cause lasting baneful influence to atmospheric environment.Along with the requirement of people to environment is more and more higher, how to control and process the stink of vegetable oil mill waste water, cause the great attention of people.
Summary of the invention
Object of the present invention is exactly for solving
grease factory waste water foul odour material is removedtechnical problem, provide
the minimizing technology of a kind of grease factory waste water foul odour material, good keep grease factory wastewater treatment water quality while, volatile malodorous odoring substance can be controlled in waste water to the harm of atmospheric environment.
Technical scheme of the present invention is, the minimizing technology of a kind of grease factory waste water foul odour material, comprises the following steps:
1) equipment of the removal oil wastewater foul odour material comprising bio-reactor and vertical sedimentation basin composition is equipped with;
2) grease factory waste water is entered bio-reactor by closed conduit bottom bio-reactor, while waste water enters bio-reactor, in waste water, throw in nitrate, control the COD/NO in waste water
3-N=4.2-4.8, and start stirrer stirring in bio-reactor, carry out biological respinse process, control below dissolved oxygen 0.2mg/L in bio-reactor, bio-reactor adopts sludge reflux, and controlling sludge concentration in bio-reactor is 2000-6000mg/L, and return sludge ratio is 50-150%;
3) by step 2) water after process enters vertical sedimentation basin precipitation from bio-reactor top, and the hydromining overflow type of settling tank enters follow-up treatment facility and continues process.
The equipment removing oil wastewater foul odour material described in step 1) comprises bio-reactor and vertical sedimentation basin, also comprise mud return line, biological respinse wall is provided with wastewater inlet pipe and overflow port, wastewater inlet pipe is arranged on the bottom of biological respinse wall, overflow port is arranged on the top of biological respinse wall, the bottom in bio-reactor is stretched in wastewater inlet pipe one end, stretch on the wastewater inlet pipe in bio-reactor and connect through many equally distributed arms, every root arm is provided with some posticums, the wastewater inlet pipe the other end stretches out and connects waste water source outward at bio-reactor, the wastewater inlet pipe stretched out outside bio-reactor is provided with control gate valve, chemicals dosing plant, chemicals dosing plant is provided with chemical feed pipe and connects wastewater inlet pipe, bio-reactor top is provided with bio-reactor water leg along inwall, bio-reactor water leg connects overflow port, in bio-reactor, stirrer is installed, settling tank is that Upper cylindrical shape and lower cone shape connect and compose vertical sedimentation basin, settling tank top wall is provided with settling tank water inlet pipe and water outlet, bottom settling tank, conical end is provided with sludge outlet, pipe core is provided with in settling tank, shore pipe and settling tank water leg, pipe core is arranged on the centre in settling tank, pipe core connects the overflow port of bio-reactor by settling tank water inlet pipe, settling tank water leg is arranged in settling tank upper inside wall, shore pipe upper end connects settling tank water leg, shore pipe lower end is arranged on close to sludge outlet place, shore pipe is provided with Y-tube, shore pipe is connected described wastewater inlet pipe by Y-tube with described mud return line.
Step 2) to enter bio-reactor hydraulic detention time be 24 hours to described waste water.
Step 2) describedly in waste water, throw in nitrate, in waste water, throw in nitrate by chemicals dosing plant, chemicals dosing plant comprises medicament storage tank and volume pump, and medicament storage tank connects volume pump, and the wastewater inlet pipe that volume pump connects described bio-reactor by chemical feed pipe carries out input nitrate.
Step 2) COD/NO in described control waste water
3-N=4.5.
Step 2) sludge concentration is 4000mg/L in described control bio-reactor.
Step 2) described return sludge ratio is 100%.
Entering vertical sedimentation basin sedimentation time described in step 3) is 2 hours.
Present invention process method is advanced simple, and adopt the equipment removing oil wastewater foul odour material, grease factory waste water enters bio-reactor by closed conduit (wastewater inlet pipe) from bottom, carries out biological respinse, installs stirrer and stir in reactor.Water outlet enters settling tank from bio-reactor top, and settling tank water outlet can enter follow-up treatment facility and continue process.Processing condition are arranged: (1) adds nitrate, control the COD/NO in waste water
3 -about N=4.5; (2) below dissolved oxygen 0.2mg/L in anoxic pond is controlled; (3) sludge concentration controlling bio-reactor is 2000-6000mg/L, return sludge ratio 50-150%.By above-mentioned treatment process, waste water is degraded in treating processes containing rance material, does not almost have rancidity to overflow, make the unit of waste water subsequent disposal (as aeration) also no longer distribute rance material in the waste water after this method process.
Beneficial effect: 1, by the enforcement of the inventive method, is degraded containing rance material in waste water, ordorless material effusion; 2, the subsequent processing units of waste water can adopt conventional processing measure, ordorless gaseous matter effusion; 3, processing method is simple, easy in the waste water disposal facility transformation of grease factory; 4, inventive process avoids the topsoil because the volatilization of foul odour material in oil wastewater causes, protect atmospheric environment.
Accompanying drawing explanation
Fig. 1 is the equipment sectional view of removal oil wastewater foul odour material of the present invention.
Fig. 2 is the equipment vertical view of removal oil wastewater foul odour material of the present invention.
Fig. 3 is the equipment back with water inlet line layout drawing of removal oil wastewater foul odour material of the present invention.
In figure: 1 wastewater inlet pipe, 2 stirrers, 3 settling tank water inlet pipes, 4 pipe cores, 5 reflectors, 6 bio-reactor water legs, 7 baffle plates, 8 shore pipes, 9 settling tank water legs, 10 medicament storage tanks, 11 volume pumps, 12 chemical feed pipes, 13 mud return lines, 14 stirrers, 15 sludge reflux pumps, 16 rising pipes, 18 arms, 19 posticums.
Embodiment
In order to understand the present invention better, describe technical scheme of the present invention in detail with specific examples below, but the present invention is not limited thereto.A minimizing technology for grease factory waste water foul odour material,
Embodiment 1
1) equipment removing oil wastewater foul odour material is equipped with, comprise bio-reactor, vertical sedimentation basin, mud return line, biological respinse wall is provided with wastewater inlet pipe and overflow port, wastewater inlet pipe is arranged on the bottom of biological respinse wall, overflow port is arranged on the top of biological respinse wall, the bottom in bio-reactor is stretched in wastewater inlet pipe one end, stretch on the wastewater inlet pipe in bio-reactor and connect through many equally distributed arms, every root arm is provided with some posticums, the wastewater inlet pipe the other end stretches out and connects waste water source outward at bio-reactor, the wastewater inlet pipe stretched out outside bio-reactor is provided with control gate valve, chemicals dosing plant, chemicals dosing plant is provided with chemical feed pipe and connects wastewater inlet pipe, bio-reactor top is provided with bio-reactor water leg along inwall, bio-reactor water leg connects overflow port, in bio-reactor, stirrer is installed, settling tank is that Upper cylindrical shape and lower cone shape connect and compose vertical sedimentation basin, settling tank top wall is provided with settling tank water inlet pipe and water outlet, bottom settling tank, conical end is provided with sludge outlet, pipe core is provided with in settling tank, shore pipe and settling tank water leg, pipe core is arranged on the centre in settling tank, pipe core connects the overflow port of bio-reactor by settling tank water inlet pipe, settling tank water leg is arranged in settling tank upper inside wall, shore pipe upper end connects settling tank water leg, shore pipe lower end is arranged on close to sludge outlet place, shore pipe is provided with Y-tube, shore pipe is connected described wastewater inlet pipe by Y-tube with described mud return line.
2) grease factory waste water is entered bio-reactor by closed conduit bottom bio-reactor, carry out biological respinse, waste water index is: COD=2500.00mg/L, NO
3 -n=0.00mg/L, adopts installation stirrer in bio-reactor to stir, adds saltpetre as denitrification nitrogenous source, make COD/NO
3 -n=4.5:1.I.e. NO
3 -n=555.56mg/L, every 1L waste water adds 4.01gKNO
3; Hydraulic detention time is 24h, controls below dissolved oxygen 0.2mg/L in anoxic pond, return sludge ratio 150%; Sludge concentration MLSS=5000mg/L.
3) water after bio-reactor reaction treatment enters vertical sedimentation basin from bio-reactor top and precipitates 2 hours, and the hydromining overflow type of settling tank enters follow-up treatment facility and continues process.
Embodiment 2
1) equipment removing oil wastewater foul odour material is equipped with, comprise bio-reactor, vertical sedimentation basin, mud return line, biological respinse wall is provided with wastewater inlet pipe and overflow port, wastewater inlet pipe is arranged on the bottom of biological respinse wall, overflow port is arranged on the top of biological respinse wall, the bottom in bio-reactor is stretched in wastewater inlet pipe one end, stretch on the wastewater inlet pipe in bio-reactor and connect through many equally distributed arms, every root arm is provided with some posticums, the wastewater inlet pipe the other end stretches out and connects waste water source outward at bio-reactor, the wastewater inlet pipe stretched out outside bio-reactor is provided with control gate valve, chemicals dosing plant, chemicals dosing plant is provided with chemical feed pipe and connects wastewater inlet pipe, bio-reactor top is provided with bio-reactor water leg along inwall, bio-reactor water leg connects overflow port, in bio-reactor, stirrer is installed, settling tank is that Upper cylindrical shape and lower cone shape connect and compose vertical sedimentation basin, settling tank top wall is provided with settling tank water inlet pipe and water outlet, bottom settling tank, conical end is provided with sludge outlet, pipe core is provided with in settling tank, shore pipe and settling tank water leg, pipe core is arranged on the centre in settling tank, pipe core connects the overflow port of bio-reactor by settling tank water inlet pipe, settling tank water leg is arranged in settling tank upper inside wall, shore pipe upper end connects settling tank water leg, shore pipe lower end is arranged on close to sludge outlet place, shore pipe is provided with Y-tube, shore pipe is connected described wastewater inlet pipe by Y-tube with described mud return line.
2) grease factory waste water is entered bio-reactor by closed conduit bottom bio-reactor, carry out biological respinse, waste water index is: COD=2500.00mg/L, NO
3 -n=0.00mg/L, adopts installation stirrer in bio-reactor to stir, adds saltpetre as denitrification nitrogenous source, make COD/NO
3 -n=4.2:1.I.e. NO
3 -n=555.56mg/L, every 1L waste water adds 4.01gKNO
3; Hydraulic detention time is 24h, controls below dissolved oxygen 0.2mg/L in anoxic pond, return sludge ratio 100%; Sludge concentration MLSS=6000mg/L.
3) water after bio-reactor reaction treatment enters vertical sedimentation basin from bio-reactor top and precipitates 2 hours, and the hydromining overflow type of settling tank enters follow-up treatment facility and continues process.
Embodiment 3
1) equipment removing oil wastewater foul odour material is equipped with, comprise bio-reactor, vertical sedimentation basin, mud return line, biological respinse wall is provided with wastewater inlet pipe and overflow port, wastewater inlet pipe is arranged on the bottom of biological respinse wall, overflow port is arranged on the top of biological respinse wall, the bottom in bio-reactor is stretched in wastewater inlet pipe one end, stretch on the wastewater inlet pipe in bio-reactor and connect through many equally distributed arms, every root arm is provided with some posticums, the wastewater inlet pipe the other end stretches out and connects waste water source outward at bio-reactor, the wastewater inlet pipe stretched out outside bio-reactor is provided with control gate valve, chemicals dosing plant, chemicals dosing plant is provided with chemical feed pipe and connects wastewater inlet pipe, bio-reactor top is provided with bio-reactor water leg along inwall, bio-reactor water leg connects overflow port, in bio-reactor, stirrer is installed, settling tank is that Upper cylindrical shape and lower cone shape connect and compose vertical sedimentation basin, settling tank top wall is provided with settling tank water inlet pipe and water outlet, bottom settling tank, conical end is provided with sludge outlet, pipe core is provided with in settling tank, shore pipe and settling tank water leg, pipe core is arranged on the centre in settling tank, pipe core connects the overflow port of bio-reactor by settling tank water inlet pipe, settling tank water leg is arranged in settling tank upper inside wall, shore pipe upper end connects settling tank water leg, shore pipe lower end is arranged on close to sludge outlet place, shore pipe is provided with Y-tube, shore pipe is connected described wastewater inlet pipe by Y-tube with described mud return line.
2) grease factory waste water is entered bio-reactor by closed conduit bottom bio-reactor, carry out biological respinse, waste water index is: COD=2500.00mg/L, NO
3 -n=0.00mg/L, adopts installation stirrer in bio-reactor to stir, adds saltpetre as denitrification nitrogenous source, make COD/NO
3 -n=4.8:1.I.e. NO
3 -n=555.56mg/L, every 1L waste water adds 4.01gKNO
3; Hydraulic detention time is 24h, controls below dissolved oxygen 0.2mg/L in anoxic pond, return sludge ratio 50%; Sludge concentration MLSS=2000mg/L.
3) water after bio-reactor reaction treatment enters vertical sedimentation basin from bio-reactor top and precipitates 2 hours, and the hydromining overflow type of settling tank enters follow-up treatment facility and continues process.
Claims (8)
1. a minimizing technology for grease factory waste water foul odour material, is characterized in that, comprise the following steps:
1) equipment of the removal oil wastewater foul odour material comprising bio-reactor and vertical sedimentation basin composition is equipped with;
2) grease factory waste water is entered bio-reactor by closed conduit bottom bio-reactor, while waste water enters bio-reactor, in waste water, throw in nitrate, control the COD/NO in waste water
3-N=4.2-4.8, and start stirrer stirring in bio-reactor, carry out biological respinse process, control below dissolved oxygen 0.2mg/L in bio-reactor, bio-reactor adopts sludge reflux, and controlling sludge concentration in bio-reactor is 2000-6000mg/L, and return sludge ratio is 50-150%;
3) by step 2) water after process enters vertical sedimentation basin precipitation from bio-reactor top, and the hydromining overflow type of settling tank enters follow-up treatment facility and continues process.
2. the minimizing technology of a kind of grease factory according to claim 1 waste water foul odour material, it is characterized in that, the equipment of described removal oil wastewater foul odour material comprises bio-reactor and vertical sedimentation basin, also comprise mud return line, biological respinse wall is provided with wastewater inlet pipe and overflow port, wastewater inlet pipe is arranged on the bottom of biological respinse wall, overflow port is arranged on the top of biological respinse wall, the bottom in bio-reactor is stretched in wastewater inlet pipe one end, stretch on the wastewater inlet pipe in bio-reactor and connect through many equally distributed arms, every root arm is provided with some posticums, the wastewater inlet pipe the other end stretches out and connects waste water source outward at bio-reactor, the wastewater inlet pipe stretched out outside bio-reactor is provided with control gate valve, chemicals dosing plant, chemicals dosing plant is provided with chemical feed pipe and connects wastewater inlet pipe, bio-reactor top is provided with bio-reactor water leg along inwall, bio-reactor water leg connects overflow port, in bio-reactor, stirrer is installed, settling tank is that Upper cylindrical shape and lower cone shape connect and compose vertical sedimentation basin, settling tank top wall is provided with settling tank water inlet pipe and water outlet, bottom settling tank, conical end is provided with sludge outlet, pipe core is provided with in settling tank, shore pipe and settling tank water leg, pipe core is arranged on the centre in settling tank, pipe core connects the overflow port of bio-reactor by settling tank water inlet pipe, settling tank water leg is arranged in settling tank upper inside wall, shore pipe upper end connects settling tank water leg, shore pipe lower end is arranged on close to sludge outlet place, shore pipe is provided with Y-tube, shore pipe is connected described wastewater inlet pipe by Y-tube with described mud return line.
3. the minimizing technology of a kind of grease factory according to claim 1 waste water foul odour material, is characterized in that, step 2) to enter bio-reactor hydraulic detention time be 24 hours to described waste water.
4. the minimizing technology of a kind of grease factory according to claim 1 waste water foul odour material, it is characterized in that, step 2) describedly in waste water, throw in nitrate, in waste water, throw in nitrate by chemicals dosing plant, chemicals dosing plant comprises medicament storage tank and volume pump, medicament storage tank connects volume pump, and the wastewater inlet pipe that volume pump connects described bio-reactor by chemical feed pipe carries out input nitrate.
5. the minimizing technology of a kind of grease factory according to claim 1 waste water foul odour material, is characterized in that, step 2) COD/NO in described control waste water
3-N=4.5.
6. the minimizing technology of a kind of grease factory according to claim 1 waste water foul odour material, is characterized in that, step 2) sludge concentration is 4000mg/L in described control bio-reactor.
7. the minimizing technology of a kind of grease factory according to claim 1 waste water foul odour material, is characterized in that, step 2) described return sludge ratio is 100%.
8. the minimizing technology of a kind of grease factory according to claim 1 waste water foul odour material, it is characterized in that, entering vertical sedimentation basin sedimentation time described in step 3) is 2 hours.
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| CN201510324670.3A CN104944699B (en) | 2015-06-15 | 2015-06-15 | A kind of minimizing technology of grease factory waste water foul odour material |
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| CN201510324670.3A CN104944699B (en) | 2015-06-15 | 2015-06-15 | A kind of minimizing technology of grease factory waste water foul odour material |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318741A (en) * | 2008-07-11 | 2008-12-10 | 北京城市排水集团有限责任公司 | Apparatus and method for synchronous denitrification and development of sewage sludge internal carbon source of urban sewage |
| WO2014205588A1 (en) * | 2013-06-24 | 2014-12-31 | Ingenieria Y Construccion Biofiltro Limitada | Treatment for domestic and industrial waste water |
| CN204111525U (en) * | 2014-08-21 | 2015-01-21 | 广州嘉康环保技术有限公司 | A kind of aquaculture Waste Water Treatment |
-
2015
- 2015-06-15 CN CN201510324670.3A patent/CN104944699B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318741A (en) * | 2008-07-11 | 2008-12-10 | 北京城市排水集团有限责任公司 | Apparatus and method for synchronous denitrification and development of sewage sludge internal carbon source of urban sewage |
| WO2014205588A1 (en) * | 2013-06-24 | 2014-12-31 | Ingenieria Y Construccion Biofiltro Limitada | Treatment for domestic and industrial waste water |
| CN204111525U (en) * | 2014-08-21 | 2015-01-21 | 广州嘉康环保技术有限公司 | A kind of aquaculture Waste Water Treatment |
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