CN109569267A - A kind of aerobic fermentation waste bio-treatment method - Google Patents
A kind of aerobic fermentation waste bio-treatment method Download PDFInfo
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- CN109569267A CN109569267A CN201811564029.7A CN201811564029A CN109569267A CN 109569267 A CN109569267 A CN 109569267A CN 201811564029 A CN201811564029 A CN 201811564029A CN 109569267 A CN109569267 A CN 109569267A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/84—Biological processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/485—Sulfur compounds containing only one sulfur compound other than sulfur oxides or hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/52—Hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/58—Ammonia
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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Abstract
The invention discloses a kind of aerobic fermentation waste bio-treatment methods, comprising the following steps: (a) is passed through air heat exchanger to the aerobic fermentation exhaust gas from aerobic fermentation tank and exchanges heat, and then passes to cooling tower using spray liquid and carries out spraying cooling；(b) biological deodorizing tower top spray-absorption liquid carries out after spray-absorption and bio-absorbable through biological deodorizing tower tower top discharge aerobic fermentation exhaust gas；(c) the resulting waste liquid of spray-absorption is subjected to overflow layering, the liquid overflowed is used as the absorbing liquid of biological deodorizing tower, and overflow is layered resulting solidliquid mixture and returns to biogas generating system.The present invention filters quantizer and is layered the liquid to cool down, the resulting solid content of biological deodorizing is more by baffle, clear liquid is deodorant tower circulating pump and beats to biological deodorizing tower top spray, nutriment as biological growth, its structure is simple, it is handled with the exhaust gas that the biogas slurry that aerobic fermentation generates generates aerobic fermentation, treated exhaust gas qualified discharge, energy conservation and environmental protection.
Description
Technical field
The present invention relates to aerobic fermentation technical field, especially a kind of processing method of aerobic fermentation exhaust gas.
Background technique
With society be constantly progressive, the content of organics in municipal solid wastes is continuously increased, and quantity of refuse be in by
How year increasing trend, effectively handle these house refuses, be a urgent problem to be solved.Currently used mode is to fill out
Processing is buried, a large amount of manpower and material resources are not only expended, there is also take up an area.And compost fermentation is a kind of very good solution method,
It is degraded using microbial fermentation to the organic solid waste in city, while using compost product as fertilizer, on the one hand can solve ring
On the other hand border problem can produce economic benefit again.
Solid aerobic compost be it is good in aeration condition, under conditions of oxygen is sufficient, aerobic bacteria absorbs waste, is aoxidized
And the process decomposed.Aerobic microbiological is by itself vital movement, a part of absorbed oxidation operation at simple
Inorganic matter, while releasing for energy needed for microorganism vegetative activity, and another part organic matter be then synthesized it is new
Cytoplasm makes the continuous growth and breeding of microorganism, produces more organisms.It can be generated during solid aerobic fermentation organic fertilizer
H2S、NH3, methyl mercaptan, the irritations, combustible waste gases, i.e. aerobic fermentation exhaust gas such as hydrocarbon oxygen compound, would seriously pollute the environment,
It must be effectively treated, it could qualified discharge.The processing of conventional solid aerobic fermentation exhaust gas is using absorption process, by this portion
It point is discharged containing atmosphere after smelly waste gas absorption, but has that assimilation effect is poor, foul smell discharge amount is big, the secondary pollution of generation waste water.
Summary of the invention
The purpose of the present invention is to solve exhaust gas generated during solid aerobic fermentation in the prior art because of processing
Effect difference and the problem of cause environmental pollution, a kind of aerobic fermentation waste bio-treatment method is provided.
The technical solution adopted by the present invention to solve the technical problems is: a kind of aerobic fermentation waste bio-treatment method,
The following steps are included:
(a) it cools: air heat exchanger being passed through to the aerobic fermentation exhaust gas from aerobic fermentation tank and is exchanged heat, then
It is passed through cooling tower and spraying cooling is carried out using spray liquid, the temperature of the aerobic fermentation exhaust gas after cooling down is 25-30 DEG C, spray
Resulting liquid is transported to biotinylated biomolecule deodorizing tower afterwards；
(b) biological deodorizing: the aerobic fermentation exhaust gas after cooling is passed through biological deodorizing tower lower part, biological deodorizing tower top
Spray-absorption liquid carries out after spray-absorption and bio-absorbable through biological deodorizing tower tower top discharge aerobic fermentation exhaust gas；
(c) be layered: using the resulting waste liquid of spray-absorption in step (b) biological deodorizing tower return cooling tower as spray liquid into
The resulting waste liquid of step (b) spray-absorption is carried out overflow layering by row spraying cooling, and the liquid overflowed is used as biological deodorizing
The absorbing liquid of tower, overflow are layered resulting solidliquid mixture and return to biogas generating system.
Further, spray liquid described in step (a) generates after the biogas slurry or anaerobic fermentation that aerobic fermentation generates can be selected
Organic liquid waste.
Further, temperature≤45 DEG C of the aerobic fermentation exhaust gas after air heat exchanger heat exchange in step (a).
Further, use the pressure of air-blower control cooling tower for 5-10KPa in step (a), gas-liquid volume in cooling tower
Than for 25-30:1.
Further, the exhaust gas flow velocity in step (a) in control cooling tower is 1.5-2m/s, and exhaust gas stops in cooling tower
Time be 4-6s.
Further, the liquid level of control cooling tower is 1/2-2/3 liquid level in step (a).
Further, the pressure in biological deodorizing tower described in step (b) is 2-6KPa, gas-liquid in biological deodorizing tower
Product is than being 15-20:1.
Further, the exhaust gas flow velocity in biological deodorizing tower described in step (b) is 0.5-1m/s, and exhaust gas is in cooling tower
Interior residence time is 15-20s.
Further, the pH value of biological deodorizing tower absorbing liquid described in step (b) be 6.5-7.5, solid content 0.2-
0.5%, absorbing liquid temperature is 25-35 DEG C.
Further, the resulting waste liquid of spray-absorption in biological deodorizing tower is sent into band gear by layering described in step (c)
The filtering quantizer of plate, the baffle top pass through baffle in filtering quantizer lower than the upper end for filtering quantizer, waste liquid
Overflow is divided into the solidliquid mixture positioned at the liquid of the baffle other side and positioned at baffle side, and the liquid is used as biological deodorizing
The absorbing liquid of tower, spray liquid of described solidliquid mixture a part as cooling tower, a part return biogas generating system into
Row is separated by solid-liquid separation to obtain organic fertilizer and biogas slurry, and resulting a part of biogas slurry can be used as the replenisher of cooling tower spray liquid.
The beneficial effects of the present invention are: filtering quantizer of the invention will cool down, the resulting solid content of biological deodorizing is more
Liquid carry out overflow layering, the resulting stillness of night is deodorant tower circulating pump and beats to biological deodorizing tower top spray, gives birth to as biology
Long nutriment；The spray liquid that solidliquid mixture after layering can be used as cooling tower recycles, without new in entire treatment process
Waste gas and waste liquid generate, realize the treatment of wastes with processes of wastes against one another, waste gas absorption efficiency is up to 95% or more, and treated exhaust gas qualified discharge is inhaled
Solidliquid mixture after receiving exhaust gas is sent to biogas slurry generating system, is separated by solid-liquid separation to obtain solid organic fertilizer and biogas slurry, can be used as crops
Organic fertilizer, treatment process energy conservation and environmental protection, refuse reclamation.
Detailed description of the invention
Fig. 1 is process flow chart of the invention；
In the figure, it is marked as 1- blower, 2- air cooler, 3- cooling tower, 4- biological deodorizing tower, 5- filter, 6- biological deodorizing
Tower circulated sprinkling pump, 7- cooling tower circulated sprinkling pump.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, used a kind of aerobic fermentation biological treatment device for exhaust gas of the invention, including blower 1, air
Heat exchanger 2, cooling tower 3, biological deodorizing tower 4, filtering quantizer 5, biological deodorizing tower circulating pump 6 and cooling tower circulating pump 7, institute
It states blower 1 to connect with 2 shell side of air heat exchanger, the other end of 2 shell side of air heat exchanger and 3 gas feed of cooling tower connect
It connects, 3 liquid outlet of cooling tower is connect with 4 liquid-inlet of biological deodorizing tower, the gas vent at 3 top of cooling tower and life
The gas feed of object deodorizing tower 4 connects；
The liquid outlet of 4 bottom of biological deodorizing tower is connect with filtering 5 lower part of quantizer, and the biological deodorizing tower 4 is pushed up
Portion is equipped with gas discharge outlet；Baffle, which is equipped with, in the filtering quantizer 5 is divided into two parts, the baffle for quantizer 5 is filtered
Upper end of the top lower than filtering quantizer 5；It is connect on the left of 5 Internal baffle of filtering quantizer with 7 import of cooling tower circulating pump, institute
The outlet of cooling tower circulating pump 7 is stated to connect with 3 top of cooling tower；It is followed on the right side of 5 Internal baffle of filtering quantizer with biological deodorizing tower
Ring pumps 6 imports connection, and the outlet of biological deodorizing tower circulating pump 6 is connect with 4 top of biological deodorizing tower.
It is provided with microbe stuffing layer in biological deodorizing tower tower, carries in the microbe stuffing layer for decomposing foul smell
In odor molecules microorganism, such as photosynthetic bacteria, lactic acid bacteria, saccharomycete, dedicated reinforced thiobacilli, nitrosation unit cell
Bacterium, bacterium nitrobacter or bacillus etc.；The microbe stuffing layer is the Pall ring filler of DN80X80mm, and exhaust gas is in tower
Bio-absorbable, the microorganism that exhaust gas will pass through microbe stuffing layer from bottom to top and carry with microbe stuffing layer are carried out on filler
It comes into full contact with sufficiently to decompose odor molecules, to handle exhaust gas, the absorbing liquid sprayed downwards is more advantageous to after humidifying exhaust gas
Exhaust gas contacts with microorganism and provides nutrition for microorganism growth, aging Automatic-falling after microorganism colonization, growth, with absorbing liquid
It is discharged from tower reactor.
The 5 Internal baffle left bottom of filtering quantizer is equipped with leakage fluid dram.
The nutritional supplementation liquid supply port connecting with the biogas slurry pond of aerobic fermentation is equipped at the top of the cooling tower 3.The cooling
3 top of tower is set there are three the spray thrower connecting with cooling tower circulating-pump outlet, and three spray throwers are in different levels
On face, the liquid-drop diameter that spray thrower control sprays out is 0.5-1mm.
Embodiment 1:
A kind of aerobic fermentation waste bio-treatment method, comprising the following steps:
(a) it cools: the aerobic fermentation exhaust gas from aerobic fermentation tank being pressurized using blower, controls cooling tower
Pressure be 5-10KPa, be passed through temperature after air heat exchanger is exchanged heat and be reduced to 45 DEG C, then pass to cooling tower using spray liquid
Spraying cooling is carried out, exhaust gas flow velocity is 1.5-2m/s, and exhaust gas residence time in cooling tower is 4-6s；Gas-liquid in cooling tower
Product is than being 25:1；The temperature of aerobic fermentation exhaust gas after cooling down is 25-30 DEG C, and resulting liquid is transported to biology after spray
Biological deodorizing tower；The biogas slurry that the spray liquid selects aerobic fermentation to generate, the liquid level for controlling cooling tower is that 1/2-2/3 liquid level is high
Degree.
(b) biological deodorizing: the aerobic fermentation exhaust gas after cooling is passed through biological deodorizing tower lower part, biological deodorizing tower top
Spray-absorption liquid carries out after spray-absorption and bio-absorbable through biological deodorizing tower tower top discharge aerobic fermentation exhaust gas；Biology removes
Pressure in smelly tower is 2-6KPa, and gas-liquid volume ratio is 15:1 in biological deodorizing tower, and the exhaust gas flow velocity in biological deodorizing tower is
0.5-1m/s, exhaust gas residence time in cooling tower is 15-20s；The pH value of the biological deodorizing tower absorbing liquid is 6.5-
7.5, solid content 0.2-0.5%, absorbing liquid temperature are 25-35 DEG C.
(c) it is layered: the resulting waste liquid of spray-absorption in biological deodorizing tower is sent into the filtering quantizer with baffle, it is described
Baffle top is divided by baffle overflow positioned at the baffle other side in filtering quantizer lower than the upper end for filtering quantizer, waste liquid
Liquid and solidliquid mixture positioned at baffle side, the liquid be used as the absorbing liquid of biological deodorizing tower, the solid-liquid
Spray liquid of the mixture a part as cooling tower, a part return to biogas generating system and carry out being separated by solid-liquid separation to obtain organic fertilizer and natural pond
Liquid, resulting a part of biogas slurry can be used as the replenisher of cooling tower spray liquid, or as cooling tower spray liquid when starting starting and
The absorbing liquid of biological deodorizing tower.
Embodiment 2:
A kind of aerobic fermentation waste bio-treatment method, comprising the following steps:
(a) it cools: the aerobic fermentation exhaust gas from aerobic fermentation tank being pressurized using blower, controls cooling tower
Pressure be 5-10KPa, be passed through temperature after air heat exchanger is exchanged heat and be reduced to 40 DEG C, then pass to cooling tower using spray liquid
Spraying cooling is carried out, exhaust gas flow velocity is 1.5-2m/s, and exhaust gas residence time in cooling tower is 4-6s；Gas-liquid in cooling tower
Product is than being 30:1；The temperature of aerobic fermentation exhaust gas after cooling down is 25-30 DEG C, and resulting liquid is transported to biology after spray
Biological deodorizing tower；The spray liquid selects the organic liquid waste generated after anaerobic fermentation, and the liquid level for controlling cooling tower is 1/2-2/3
Liquid level.
(b) biological deodorizing: the aerobic fermentation exhaust gas after cooling is passed through biological deodorizing tower lower part, biological deodorizing tower top
Spray-absorption liquid carries out after spray-absorption and bio-absorbable through biological deodorizing tower tower top discharge aerobic fermentation exhaust gas；Biology removes
Pressure in smelly tower is 2-6KPa, and gas-liquid volume ratio is 20:1 in biological deodorizing tower, and the exhaust gas flow velocity in biological deodorizing tower is
0.5-1m/s, exhaust gas residence time in cooling tower is 15-20s；The pH value of the biological deodorizing tower absorbing liquid is 6.5-
7.5, solid content 0.2-0.5%, absorbing liquid temperature are 25-35 DEG C.
(c) it is layered: the resulting waste liquid of spray-absorption in biological deodorizing tower is sent into the filtering quantizer with baffle, it is described
Baffle top is divided by baffle overflow positioned at the baffle other side in filtering quantizer lower than the upper end for filtering quantizer, waste liquid
Liquid and solidliquid mixture positioned at baffle side, the liquid be used as the absorbing liquid of biological deodorizing tower, the solid-liquid
Spray liquid of the mixture a part as cooling tower, a part return to biogas generating system and carry out being separated by solid-liquid separation to obtain organic fertilizer and natural pond
Liquid, resulting a part of biogas slurry can be used as the replenisher of cooling tower spray liquid, or as cooling tower spray liquid when starting starting and
The absorbing liquid of biological deodorizing tower.
Embodiment 3:
A kind of aerobic fermentation waste bio-treatment method, comprising the following steps:
(a) it cools: the aerobic fermentation exhaust gas from aerobic fermentation tank being pressurized using blower, controls cooling tower
Pressure be 5-10KPa, be passed through temperature after air heat exchanger is exchanged heat and be reduced to 42 DEG C, then pass to cooling tower using spray liquid
Spraying cooling is carried out, exhaust gas flow velocity is 1.5-2m/s, and exhaust gas residence time in cooling tower is 4-6s；Gas-liquid in cooling tower
Product is than being 27:1；The temperature of aerobic fermentation exhaust gas after cooling down is 25-30 DEG C, and resulting liquid is transported to biology after spray
Biological deodorizing tower；The spray liquid selects the organic liquid waste generated after anaerobic fermentation, and the liquid level for controlling cooling tower is 1/2-2/3
Liquid level.
(b) biological deodorizing: the aerobic fermentation exhaust gas after cooling is passed through biological deodorizing tower lower part, biological deodorizing tower top
Spray-absorption liquid carries out after spray-absorption and bio-absorbable through biological deodorizing tower tower top discharge aerobic fermentation exhaust gas；Biology removes
Pressure in smelly tower is 2-6KPa, and gas-liquid volume ratio is 18:1 in biological deodorizing tower, and the exhaust gas flow velocity in biological deodorizing tower is
0.5-1m/s, exhaust gas residence time in cooling tower is 15-20s；The pH value of the biological deodorizing tower absorbing liquid is 6.5-
7.5, solid content 0.2-0.5%, absorbing liquid temperature are 25-35 DEG C.
(c) it is layered: the resulting waste liquid of spray-absorption in biological deodorizing tower is sent into the filtering quantizer with baffle, it is described
Baffle top is divided by baffle overflow positioned at the baffle other side in filtering quantizer lower than the upper end for filtering quantizer, waste liquid
Liquid and solidliquid mixture positioned at baffle side, the liquid be used as the absorbing liquid of biological deodorizing tower, the solid-liquid
Spray liquid of the mixture a part as cooling tower, a part return to biogas generating system and carry out being separated by solid-liquid separation to obtain organic fertilizer and natural pond
Liquid, resulting a part of biogas slurry can be used as the replenisher of cooling tower spray liquid, or as cooling tower spray liquid when starting starting and
The absorbing liquid of biological deodorizing tower.
Comparative example 1:
Exhaust gas flow velocity is 3m/s in cooling tower, and exhaust gas residence time in cooling tower is 2-3s；Gas-liquid in cooling tower
Product is than being 20:1, remaining condition is the same as embodiment 1.
Comparative example 2:
Exhaust gas flow velocity is 1m/s in cooling tower, and exhaust gas residence time in cooling tower is 8-10s；Gas-liquid in cooling tower
Product is than being 35:1, remaining condition is the same as embodiment 1.
Comparative example 3:
Gas-liquid volume ratio is 10:1 in biological deodorizing tower, and the exhaust gas flow velocity in biological deodorizing tower is 2m/s, and exhaust gas is in cooling
Residence time is 10-14s in tower；The pH value of the biological deodorizing tower absorbing liquid is 6, solid content 0.8%, absorbing liquid temperature
Degree is 20 DEG C, remaining condition is the same as embodiment 1.
Comparative example 4:
Gas-liquid volume ratio is 25:1 in biological deodorizing tower, and the exhaust gas flow velocity in biological deodorizing tower is 0.3m/s, and exhaust gas is cold
But residence time is 25-30s in tower；The pH value of the biological deodorizing tower absorbing liquid is 8, solid content 1.0%, absorbing liquid
Temperature is 38 DEG C, remaining condition is the same as embodiment 1.
The gas of biological deodorizing tower tower top discharge after handled by embodiment 1-3 and comparative example 1-4 is detected, as a result
It is as shown in table 1:
Deodorizing effect (the mg/m of 1 embodiment of the present invention of table and comparative example3)
| Serial number | Ammonia | Hydrogen sulfide | Methyl mercaptan | Hydrocarbon oxygen compound | Carbon disulfide |
| Primary standard | 1 | 0.03 | 0.004 | 10 (in terms of odor concentrations) | 2 |
| Embodiment 1 | 0.85 | 0.02 | 0.004 | 9 | 1.8 |
| Embodiment 2 | 0.76 | 0.025 | 0.0035 | 8.5 | 2.0 |
| Embodiment 3 | 0.91 | 0.03 | 0.003 | 8 | 1.5 |
| Comparative example 1 | 2.0 | 0.06 | 0.01 | 25 | 3.5 |
| Comparative example 2 | 2.5 | 0.05 | 0.006 | 16 | 2.8 |
| Comparative example 3 | 1.2 | 0.04 | 0.005 | 13 | 2.4 |
| Comparative example 4 | 3.2 | 0.035 | 0.007 | 24 | 2.6 |
Claims (10)
1. a kind of aerobic fermentation waste bio-treatment method, it is characterised in that: the following steps are included:
(a) it cools: air heat exchanger being passed through to the aerobic fermentation exhaust gas from aerobic fermentation tank and is exchanged heat, is then passed to
Cooling tower carries out spraying cooling using spray liquid, and the temperature of the aerobic fermentation exhaust gas after cooling down is 25-30 DEG C, institute after spray
The liquid obtained is transported to biotinylated biomolecule deodorizing tower；
(b) biological deodorizing: the aerobic fermentation exhaust gas after cooling is passed through biological deodorizing tower lower part, biological deodorizing tower top spray
Absorbing liquid carries out after spray-absorption and bio-absorbable through biological deodorizing tower tower top discharge aerobic fermentation exhaust gas；
(c) it is layered: the resulting waste liquid of spray-absorption in step (b) biological deodorizing tower being returned into cooling tower as spray liquid and is sprayed
The resulting waste liquid of step (b) spray-absorption is carried out overflow layering by leaching cooling, and the liquid overflowed is used as biological deodorizing tower
Absorbing liquid, overflow are layered resulting solidliquid mixture and return to biogas generating system.
2. a kind of aerobic fermentation waste bio-treatment method according to claim 1, it is characterised in that: step (a) is described
Spray liquid the organic liquid waste that generates after the biogas slurry or anaerobic fermentation that aerobic fermentation generates can be selected.
3. a kind of aerobic fermentation waste bio-treatment method according to claim 1, it is characterised in that: good in step (a)
Temperature≤45 DEG C of the aerobe fermentation exhaust gas after air heat exchanger heat exchange.
4. a kind of aerobic fermentation waste bio-treatment method according to claim 1, it is characterised in that: adopted in step (a)
Pressure with air-blower control cooling tower is 5-10KPa, and gas-liquid volume ratio is 25-30:1 in cooling tower.
5. a kind of aerobic fermentation waste bio-treatment method according to claim 4, it is characterised in that: control in step (a)
Exhaust gas flow velocity in cooling tower processed is 1.5-2m/s, and exhaust gas residence time in cooling tower is 4-6s.
6. a kind of aerobic fermentation waste bio-treatment method according to claim 4 or 5, it is characterised in that: in step (a)
The liquid level for controlling cooling tower is 1/2-2/3 liquid level.
7. a kind of aerobic fermentation waste bio-treatment method according to claim 1, it is characterised in that: institute in step (b)
The pressure in biological deodorizing tower stated is 2-6KPa, and gas-liquid volume ratio is 15-20:1 in biological deodorizing tower.
8. a kind of aerobic fermentation waste bio-treatment method according to claim 7, it is characterised in that: institute in step (b)
Exhaust gas flow velocity in the biological deodorizing tower stated is 0.5-1m/s, and exhaust gas residence time in cooling tower is 15-20s.
9. a kind of aerobic fermentation waste bio-treatment method according to claim 1, it is characterised in that: step (b) is described
Biological deodorizing tower absorbing liquid pH value be 6.5-7.5, solid content 0.2-0.5%, absorbing liquid temperature be 25-35 DEG C.
10. a kind of aerobic fermentation waste bio-treatment method according to claim 1, it is characterised in that: step (c) is described
Layering the resulting waste liquid of spray-absorption in biological deodorizing tower is sent into the filtering quantizer with baffle, the baffle top
Lower than the upper end of filtering quantizer, waste liquid in filtering quantizer by baffle overflow be divided into liquid positioned at the baffle other side with
Solidliquid mixture positioned at baffle side, the liquid are used as the absorbing liquid of biological deodorizing tower, the solidliquid mixture one
Spray liquid of the part as cooling tower, a part return to biogas generating system and carry out being separated by solid-liquid separation to obtain organic fertilizer and biogas slurry, gained
A part of biogas slurry can be used as the replenisher of cooling tower spray liquid.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110237698A (en) * | 2019-06-26 | 2019-09-17 | 东莞三江港口储罐有限公司 | Oil depot exhaust treatment system |
| CN111233527A (en) * | 2020-03-15 | 2020-06-05 | 上海龙马环境科技有限公司 | Energy-conserving two-chamber kitchen garbage processing system |
| CN113493353A (en) * | 2020-03-20 | 2021-10-12 | 云南绿益环保有限公司 | Sludge fermentation method |
| CN115212679A (en) * | 2022-07-25 | 2022-10-21 | 广东工业大学 | Ammonia-containing odor gas and washing liquid recycling system and method based on anaerobic ammonia oxidation |
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