CN100337948C - Comprehensive treatment method and system for sludge from city sewage processing - Google Patents
Comprehensive treatment method and system for sludge from city sewage processing Download PDFInfo
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- CN100337948C CN100337948C CNB200410027502XA CN200410027502A CN100337948C CN 100337948 C CN100337948 C CN 100337948C CN B200410027502X A CNB200410027502X A CN B200410027502XA CN 200410027502 A CN200410027502 A CN 200410027502A CN 100337948 C CN100337948 C CN 100337948C
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- mud
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
- Y02W10/20—Sludge processing
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Abstract
The present invention discloses a comprehensive treatment method and a system for treating the sludge in urban sewage. The method comprises: urban sewage is processed by coagulation reaction, solid and liquid are separated in a settling basin, and the sludge sinks at the bottom of the basin under the gravity action. The method also orderly comprises the following procedures: A. reducing volume by gravity concentrating, B. adding carbon sources and composite bioactivity catabolic enzymes to the concentrated sludge, C. heating the sludge which is pumped into a heat exchanger by a high pressure sludge pump, D. reacting in an anaerobic environment, E. dehydrating marsh mud, etc. The method and the system can realize the reuse of resources, and can withdraw a large quantity of biological energy source (biogas) and raw materials (marsh mud) for organic compound fertilizer with high quality, so the full utilization of the resource can further reduce the operation cost of sewage treatment plants.
Description
Technical field
The present invention relates to mud integrated conduct method and system in a kind of municipal effluent, particularly a kind of mud integrated conduct method and system that realizes resource reutilization.
Background technology
At present, the treatment process to the mud that produces in the municipal sewage treatment process is following several method both at home and abroad, anaerobism, hold concurrently oxygen, landfill, burning or the like.The prerequisite that these methods are handled mud must be the mud that is produced by biochemical treatment sewage, because being carried out harmless treatment, mud need rely on microorganism organic pollutant is degraded and to decompose fully, microorganism needs enough nutrition and keeps its own existence and procreation in the process of degraded or decomposing organic pollutant, so just require to contain the isostatic nutrition in the mud, and the mud that the biochemical treatment municipal effluent is produced can satisfy the demand of microorganism fully.
But the mud that the materialization Treating Municipal Sewage is produced, its nutrient inventory is well below the mud that biochemical treatment produced, and the insider generally believes thus, and the dispose of sewage mud that produced of materialization can't carry out hazard-free and biochemical and handles.At present, the mud that the materialization Treating Municipal Sewage is produced can only adopt the method for landfill, burning.But the mud that landfill materialization Treating Municipal Sewage is produced because contain a large amount of unwanted bacterias, virus, germ and other organic pollutant in the mud, can cause serious secondary pollution to environment.The mud that the method processing materialization Treating Municipal Sewage that employing is burned is produced is low because of its fuel value, water content is high, needs to consume a large amount of energy, can increase the sludge treatment expense greatly, wastes the precious resources that some scripts can reclaim again.
Summary of the invention
At present situation, the purpose of this invention is to provide a kind of utilization again that realizes resource, the mud integrated conduct method of recovery part bioenergy and mixed organic manure raw material,
Another object of the present invention provides the mud total system of this method of use.
For realizing above-mentioned purpose, the present invention proposes the mud integrated conduct method in a kind of municipal sewage treatment: municipal effluent is through carrying out solid-liquid separation at settling tank behind the coagulating, mud at the bottom of action of gravity is lowered into settling tank after, also in turn include the following steps:
A gravity concentrates and subtracts appearance: sedimentary mud in the settling tank is pumped into sludge thickener, utilize gravity further to concentrate and subtract the appearance processing;
Add carbon source and composite bio-active lytic enzyme in the mud of b after concentrating;
C pumps into interchanger by high pressure slurry pump with mud and heats;
D anaerobic reaction: mud is pumped into anaerobic reactor carry out anaerobic treatment, produce biogas and cripple;
E cripple dehydration: will pump into the cripple water extracter by high pressure slurry pump through the cripple after the anaerobic treatment and dewater.
Municipal effluent is after a series of processing of process, in settling tank, carry out solid-liquid separation, supernatant liquor is proceeded sewage purification, the moisture percentage in sewage sludge of post precipitation is also higher, common water ratio is more than 97%, and volume is also bigger, adopts the described step a of present method that mud is concentrated and subtracts appearance, reduce to 94-96.5% through water ratio in the mud behind the step a, volume can reduce 2/3rds.The mud of post precipitation pumps into sludge thickener from settling tank.
Method of the present invention adopts anaerobism mesophilic digestion technology to sludge treatment, promptly utilizes anaerobic reaction to produce biogas and cripple.Step b of the present invention is to adding carbon source and composite bio-active lytic enzyme through the spissated mud of gravity.Described carbon source is selected from alcohols, carbohydrate or starchy material, and described composite bio-active lytic enzyme is selected from two kinds or the above prozyme that comprises in lipase, proteolytic enzyme, amylase or the lignocellulose enzyme.Adding a small amount of carbon source is to handle low shortcoming and the insufficient problem of anerobe nutrition of mud BOD content that produces for solving sewage physicochemical.Add again after adopting carbon source and the micro-composite bio-active lytic enzyme that adds simultaneously or adopting elder generation that carbon source is decomposed with micro-composite bio-active lytic enzyme.Preferably the carbon source of adding is at first decomposed better effects if with micro-composite bio-active lytic enzyme to it.On the other hand, the abendoned oil that the sewage degrease processing produces, grease, protein or the like are also benefited to improving product natural pond amount, produce natural pond amount raising in order to make, preferred version of the present invention comprises also that with in the sewage treatment process protein that deoiling step obtains, oil or lipid waste add to carbon source and composite bio-active lytic enzyme and carry out anaerobic treatment in the anaerobic reactor.
The mud of process step c pumps into interchanger by high pressure slurry pump and heats, and the Heating temperature scope is at 39～42 ℃.
In steps d of the present invention, mud carries out the innoxious of mud and subtracts to hold handling in anaerobic reactor, and the organic pollutant in the mud, albumen, lipid acid or the like are decomposed the back by anerobe and produces biogas, and mud becomes cripple.Its residence time is 150～300 hours.Biogas is stored in the biogas storage tank, and will remains cripple and carry out processed.
The described cripple of present method step e water ratio after dewatering is 75～80%, and the organic content of cripple is about about 65%, can be used to make the raw material or the soil improvement agent of mixed organic manure.Especially also can be made into the water storage type mixed organic manure of the afforestation special use of arid area in the north.Preferred version employing high-pressure diaphragm pump pumps into plate and frame(type)filter press and dewaters.
The biogas that method of the present invention utilizes anaerobic treatment to produce carries out bioenergy and utilizes (generating or heating) again, reduces cost of sewage disposal.Biogas in the biogas storage tank and diesel oil acted as a fuel after according to 7: 3～9: 1 mixed supply with natural pond bavin hybrid generator generating, for each consumer in the Sewage treatment systems provides power supply.For example be various fan-type or pump class power supplies.And the generator cooling circulating water provides heat energy for the interchanger that heats mud.
For realizing another object of the present invention, design the mud total system in a kind of municipal sewage treatment, comprise settling tank, it is characterized in that: also comprise sludge thickener, high pressure slurry pump, interchanger, anaerobic reactor, biogas storage tank and cripple water extracter, wherein
The sludge pump interface of described settling tank and sludge thickener mud inlet are by pipe connection, and the mud mouth of sludge thickener is connected with high pressure slurry pump, interchanger, anaerobic reactor, high pressure slurry pump and cripple water extracter successively by pipeline;
Pipe connection is passed through in the air outlet of described biogas storage tank inlet mouth and anaerobic reactor, and is provided with under meter, safety discharging air valve.
The preferred tube settler of wherein said settling tank, the preferred high-pressure diaphragm pump of sludge pump, the preferred plate and frame(type)filter press of described cripple water extracter.
Mud total system of the present invention, wherein also comprise natural pond bavin hybrid generator, the cooling circulating water water outlet of described natural pond bavin hybrid generator is connected with water outlet with the water-in of interchanger respectively by pipeline with water-in, and generator links to each other with each consumer by lead.
Mud total system of the present invention, its preferred version also comprise the protein in the oil removing facility, oil or lipid waste discharge line are linked to each other with the pipeline that enters high pressure slurry pump.
Beneficial effect of the present invention is as follows:
Can realize the utilization again of resource, reclaim a large amount of bioenergies (biogas) and the raw material (cripple) of high-quality mixed organic manure, make full use of these resources and can further reduce the running cost of sewage work.
Description of drawings
Fig. 1 is the process flow sheet of mud total system one preferred embodiment in the municipal sewage treatment of the present invention.
Embodiment
Below in conjunction with accompanying drawing,, will make technical scheme of the present invention and other beneficial effect apparent by detailed description to preferred embodiment of the present invention.
In the embodiment shown in fig. 1, comprise a tube settler 1, also comprise sludge thickener 2, high pressure slurry pump 3, interchanger 4, anaerobic reactor 5, high pressure slurry pump 6, cripple water extracter 7, biogas storage tank 8, natural pond bavin hybrid generator 9 and diesel oil tank 10, wherein
The sludge pump interface of tube settler 1 and the mud inlet of sludge thickener 2 pass through pipe connection, the mud mouth of sludge thickener 2 connects high pressure slurry pump 3, interchanger 4 and anaerobic reactor 5 successively by sludge pipe, and the mud mouth of anaerobic reactor 5 connects high pressure slurry pump 6 and cripple water extracter 7 successively by sludge pipe.During this was implemented, high pressure slurry pump 3 and high pressure slurry pump 6 all adopted high-pressure diaphragm pump.Cripple water extracter 7 is a plate and frame(type)filter press.
Pipe connection is passed through in the air outlet of described biogas storage tank 8 inlet mouths and anaerobic reactor 5.And be connected to natural pond bavin hybrid generator 9 by methane pipeline.
The cooling circulating water water outlet of described natural pond bavin hybrid generator 9 is connected with water outlet with the water-in of interchanger respectively by pipeline with water-in, forms hot water line and water return pipeline.Described natural pond bavin hybrid generator 9 links to each other with each consumer by lead.
In this embodiment, greasy dirts are removed in flow through oil removal by air bubbling pond 11 of the supernatant liquor of the tube settler in the sewage disposal device 1.The isolated protein in oil removal by air bubbling pond 11, oil or lipid waste are connected with pipeline between the high pressure slurry pump 3 by pipeline and sludge thickener 2, and grease the like waste and carbon source and composite bio-active lytic enzyme can pump into interchanger 4 by high pressure slurry pump 3 simultaneously.
In this embodiment, the filtrate of the parting liquid of the generation of sludge thickener 2 and 7 generations of cripple water extracter is flowed back to the pump house 12 that catchments of sewage disposal by water return pipeline.
Municipal effluent carries out abundant solid-liquid separation through after a series of processing in tube settler 1, supernatant liquor is proceeded sewage purification, and the moisture percentage in sewage sludge of post precipitation only is about 97%.Mud pumps into sludge thickener 2, through subgravity is concentrated again water ratio in the mud is reduced to about 95%, with high-pressure diaphragm pump 3 with mud together with at first using micro-composite bio-active lytic enzyme (lipase, proteolytic enzyme, amylase, lignocellulose enzyme) to its carbon source of decomposing (alcohols), and the grease the like waste that produces of oil removal by air bubbling pond 11 together pumps into 4 pairs of mud of interchanger and heats, mud is heated to about 40 ℃, enters anaerobic reactor and stop after 250 hours.The biogas that produces is stored in the biogas storage tank 8, through the mud after the anaerobic treatment, cleared up and be cripple, pumped into cripple water extracter 7 (plate and frame(type)filter press) with high-pressure diaphragm pump 6 and dewater, the harmless cripple after the dehydration is as mixed organic manure or soil improvement agent.
The method of embodiments of the invention will be stored in that the diesel oil in the biogas and diesel oil tank 10 enters natural pond bavin hybrid generator 9 by the road respectively in the biogas storage tank 8, biogas and diesel oil according to 80: 20 mixed after, supplying with natural pond bavin hybrid generator 9 acts as a fuel, the electricity that generator sends provides the energy for each consumer in sewage and the sludge treating system, and natural pond bavin hybrid generator 9 cooling circulating waters provide heat energy for the interchanger 4 of heating mud again.
Claims (13)
1, the mud integrated conduct method in a kind of municipal sewage treatment, municipal effluent be through carrying out solid-liquid separation at settling tank behind the coagulating, mud at the bottom of action of gravity is lowered into settling tank after, it is characterized in that: also in turn include the following steps:
A gravity concentrates and subtracts appearance: sedimentary mud in the settling tank is pumped into sludge thickener, utilize gravity further to concentrate and subtract the appearance processing;
Add carbon source and composite bio-active lytic enzyme in the mud of b after concentrating;
C pumps into interchanger by high pressure slurry pump with mud and heats;
D anaerobic reaction: mud is pumped into anaerobic reactor carry out anaerobic treatment, produce biogas and cripple;
E cripple dehydration: will pump into the cripple water extracter by high pressure slurry pump through the cripple after the anaerobic treatment and dewater.
2, mud integrated conduct method according to claim 1 is characterized in that: the water ratio through the mud behind the step a is reduced to 94-96.5%.
3, mud integrated conduct method according to claim 1 is characterized in that: described step b adds after adopting carbon source and the micro-composite bio-active lytic enzyme that adds simultaneously or adopting elder generation that carbon source is decomposed with micro-composite bio-active lytic enzyme again.
4, mud integrated conduct method according to claim 1, it is characterized in that: the described carbon source of described step b is selected from alcohols, carbohydrate or starchy material, and described composite bio-active lytic enzyme is selected from two kinds or the above prozyme that comprises in lipase, proteolytic enzyme, amylase or the lignocellulose enzyme.
5, mud integrated conduct method according to claim 1 is characterized in that: described step b comprises that also protein, oil or lipid waste that the sewage treatment process deoiling step is obtained add with carbon source and composite bio-active lytic enzyme.
6, mud integrated conduct method according to claim 1 is characterized in that: the Heating temperature scope of step c is at 39～42 ℃.
7, mud integrated conduct method according to claim 1 is characterized in that: described steps d mud residence time in anaerobic reactor is 150～300 hours.
8, mud integrated conduct method according to claim 1 is characterized in that: the water ratio of the cripple of described step e after dehydration is 70～80%, and cripple is used to make mixed organic manure or soil improvement agent.
9, mud integrated conduct method according to claim 8, it is characterized in that: comprise that also the biogas that will produce in the anaerobic reactor is stored in the biogas storage tank, and act as a fuel after using biogas and diesel oil in the biogas storage tank according to 7: 3～9: 1 mixed and supply with natural pond bavin hybrid generator and generate electricity, for each consumer in the Sewage treatment systems provides power supply, and the generator cooling circulating water provides heat energy for the interchanger that heats mud.
10, the mud total system in a kind of municipal sewage treatment comprises settling tank, it is characterized in that: also comprise sludge thickener, high pressure slurry pump, interchanger, anaerobic reactor, biogas storage tank and cripple water extracter, wherein,
The sludge pump interface of described settling tank and sludge thickener mud inlet are by pipe connection, and the mud mouth of sludge thickener is connected with high pressure slurry pump, interchanger, anaerobic reactor, high pressure slurry pump and cripple water extracter successively by pipeline;
Pipe connection is passed through in the air outlet of described biogas storage tank inlet mouth and anaerobic reactor.
11, mud total system according to claim 10, it is characterized in that: also comprise natural pond bavin hybrid generator, the cooling circulating water water outlet of described natural pond bavin hybrid generator is connected with water outlet with the water-in of interchanger respectively by pipeline with water-in.
12, mud total system according to claim 10 is characterized in that: described settling tank is a tube settler, and described high pressure slurry pump is a high-pressure diaphragm pump, and described cripple water extracter is a plate and frame(type)filter press.
13, mud total system according to claim 10 is characterized in that: also comprise the protein in the oil removing facility in the sewage disposal, oil or lipid waste discharge line are linked to each other with the pipeline that enters high pressure slurry pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB200410027502XA CN100337948C (en) | 2004-06-09 | 2004-06-09 | Comprehensive treatment method and system for sludge from city sewage processing |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200410027502XA CN100337948C (en) | 2004-06-09 | 2004-06-09 | Comprehensive treatment method and system for sludge from city sewage processing |
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| CN1706751A CN1706751A (en) | 2005-12-14 |
| CN100337948C true CN100337948C (en) | 2007-09-19 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870546B (en) * | 2010-06-01 | 2011-12-28 | 广州市保明莱环保科技有限公司 | River surge silt harmless and recycling treatment method |
| CN101948231B (en) * | 2010-10-14 | 2011-11-16 | 北京科技大学 | High-concentration anaerobic sludge digestion treatment process for carrying out mechanical dewatering on sludge |
| CN102276105B (en) * | 2011-05-18 | 2013-01-09 | 周志杰 | Low-carbon and low-pollutant-discharging sewage processing system with energy and valuable substance recovering function |
| JP5905364B2 (en) * | 2012-08-14 | 2016-04-20 | 三菱重工環境・化学エンジニアリング株式会社 | Paper supply device, defibrating system, and sludge dewatering system |
| CN104338739A (en) * | 2014-10-16 | 2015-02-11 | 张雪 | Harmless comprehensive treatment method of municipal refuse and sludge |
| CN108358361A (en) * | 2018-03-22 | 2018-08-03 | 天津市众源环保工程有限公司 | A kind of organic sewage environment-friendly treatment method and device |
| CN111557259A (en) * | 2020-05-14 | 2020-08-21 | 郑家雄 | Three-dimensional multi-layer multi-section shrimp farming integrated system and farming method |
| CN114106081B (en) * | 2021-11-29 | 2023-10-03 | 江南大学 | Method for extracting protein from excess sludge |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3713739A1 (en) * | 1987-04-24 | 1988-11-17 | Roehm Gmbh | METHOD FOR IMPROVING THE DRAINABILITY OF BIOLOGICAL CLEANING SLUDGE |
| JP2000005797A (en) * | 1998-06-23 | 2000-01-11 | Mitsubishi Heavy Ind Ltd | Method for recovering metahne from organic solid |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3713739A1 (en) * | 1987-04-24 | 1988-11-17 | Roehm Gmbh | METHOD FOR IMPROVING THE DRAINABILITY OF BIOLOGICAL CLEANING SLUDGE |
| JP2000005797A (en) * | 1998-06-23 | 2000-01-11 | Mitsubishi Heavy Ind Ltd | Method for recovering metahne from organic solid |
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