CN102180571B - Method and system for biologically treating restaurant and kitchen garbage at high speed - Google Patents
Method and system for biologically treating restaurant and kitchen garbage at high speed Download PDFInfo
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Abstract
The invention relates to a method for treating restaurant and kitchen garbage (commonly known as swill) produced by restaurants and dining halls and high-concentration organic sewage produced in the industrial and agricultural production process. A method for biologically treating the restaurant and kitchen garbage at a high speed comprises the following steps of: pretreating the restaurant and kitchen garbage or the high-concentration organic sewage, removing grease, and performing primary hydrolysis acidification; and performing anaerobic digestion at an ultrahigh temperature by using at least three stages of anaerobic digestion reactors. A system for biologically treating the restaurant and kitchen garbage at the high speed consists of three or more stages of anaerobic digestion reactors; and system engineering has a buried design, and the reactors are arranged underground. By the method and the system for biologically treating the restaurant and kitchen garbage at the high speed, an ultrahigh temperature multi-stage anaerobic digestion process is adopted, the engineering has a buried and tight design, the structure is simple, investment is small, the occupied space is small, the garbage biological treatment effect is good, and good social and economic benefits are achieved during implementation and popularization.
Description
Technical field
The processing of the high concentration organic sewage that the present invention relates to produce in changing food waste (being commonly called as swill) that restaurant, dining room produce and worker, the agricultural production process particularly relates to a kind of changing food waste high speed bioremediation and system.
Background technology
The city changing food waste is the source that produces sewer oil, rubbish pig at present, and these rubbish get into people's dining table from various channels, have seriously jeopardized the healthy of the people.It is reported that restaurant, Zhengzhou City, dining room produce about 500 tons of leftovers leftovers changing food waste every day, add the changing food waste in restaurant, meal kitchen, the dining room sewage effluent, prediction is up to 700-800 tons; Annual restaurant, the whole nation, dining room changing food waste generation have reached 60,000,000 tons.Changing food waste, sewer oil have caused the great attention of central authorities and local governments at all levels to the impact of food safety; No. 36 files of General Office of the State Council's on July 13rd, 2010 are about " strengthening the suggestion of sewer oil regulation and kitchen castoff management "; Require prefectures and cities with mayor's responsibility system, coordinate each functional department and strengthen the changing food waste management.China's changing food waste harmless treatment is started late, nearly two be only in indivedual cities such as Xining, rather sprinkle, cities such as Beijing, Shanghai are at the early-stage.Wherein administer the changing food waste effect best be the Xining, " Xining pattern " is to specify professional enterprise to establish changing food waste treatment plant by government to handle changing food wastes such as leftovers, leftovers, 200 yuan of one ton of changing food waste government subsidy of every processing enterprises of enterprise.Prefectures and cities learn " Xining pattern " one after another.
" but Xining pattern " has following " congenital " deficiency: 1, the changing food waste utilization ratio is low, and processing cost is high, handles one ton of changing food waste enterprise and will lose more than 150 yuan.The at present domestic changing food waste treatment technology that generally adopts is a biochemical process; Changing food waste treatment plant collects behind the changing food waste through physical and chemical processes such as oil removing, dehydration, oven dry; Solid matter is made animal-feed, and sewer oil becomes industrial chemicals, and sewage is through processing up to standard back discharging.Establish that changing food waste treatment plant investment is big, processing cost is high, the changing food waste utility value is low, and the waste water that produces in the processing also needs processing up to standard, and changing food waste solids content 10-12%, large amount of sewage need handle has increased no small processing costs; In addition, changing food waste causes secondary pollution easily in collection, transportation, processing, blowdown process.2, changing food waste processing fraction of coverage is low, can only handle restaurant, dining room leftovers leftovers changing food waste, and can not handle the changing food waste in restaurant, meal kitchen, the dining room sewage effluent, can not block sewer oil, rubbish pig leak fully.More crucial reason is that changing food waste treatment plant does not have government's great number fiscal subsidy to be difficult to operation, so " Xining pattern " promoted relatively difficulty.With the Zhengzhou City is example: 15 mu of the occupations of land of building up in September, 2007, always inject capital into more than 2,380 ten thousand yuan, and the changing food waste treatment plant that design day processing utensil rubbishes is 50 tons, the back losses due to poor management of succeeding in the test run but were forced to stop production nearly 3 years because of can not get the government finance subsidy.
The changing food waste biological treatment is under certain temperature, humidity, potential of hydrogen and anaerobic condition, and producing a kind of through various microbial fermentations, Decomposition is the waste disposal method of the mixed combustible gas body (biogas) of staple with methane.The sub product biogas that the changing food waste biological treatment produces can be used as the energy, and natural pond fertilizer can be used as organic fertilizer and is used for the alternative chemical fertilizer of farm crop, and sewer oil can be used as biodiesel raw material, realizes garbage as resource fully.The development and use of rubbish biological treatment technology West Europe early; Be that the rubbish biological of representative is handled company's treatment technology and led world trends with Germany; Built up at present the rubbish biological treatment plant more or less a hundred that puts into effect in the world; Treatment system year, processing power was all more than 1,000,000 tons, made positive contribution to promoting the environment protection and the utilization of resources.But, establish a rubbish biological treatment plant and need invest several hundred million units, improved the access threshold of large scale rubbish biological treatment, suppressed the rubbish biological treatment technology greatly and applied.China's organic waste biological treatment at present mainly is used in the biological treatment that fowl is raiseeed fowl and animal excrement, organic sewage and industrial organic sewage that professional raiser or farm produce, and processing power solids content every day is several tons scale.
Summary of the invention
It is not enough to the present invention is directed to existing technology; A kind of changing food waste high speed bioremediation and system are proposed; Adopt technologies such as multistage anaerobic digestion, ultrahigh-temperature anaerobic digestion, natural pond slag be floating that changing food waste or high concentration organic sewage are carried out a biological disposal upon; Improve refuse treatment bio-digestion speed greatly, reached the resource reutilization purpose.
The technical scheme that the present invention adopted:
A kind of changing food waste high speed bioremediation; At first changing food waste or high concentration organic sewage are carried out pre-treatment; Remove degrease and carry out preliminary acidication processing, regulate potential of hydrogen, carry out Anaerobic Digestion then; Said Anaerobic Digestion process adopts at least three grades of anaerobic digestion reaction vessels, and anaerobic digestion process adopts the ultrahigh-temperature anaerobic digestion process.
Described changing food waste high speed bioremediation, anaerobic digestion process comprise that ultrahigh-temperature acidication and high temperature produce the methane reaction process, and ultrahigh-temperature acidication temperature of reaction is controlled at the 65-68 degree, and it is 5.5-6 that potential of hydrogen is set the pH value; High temperature produces the methane reaction temperature and is controlled at the 53-56 degree, and potential of hydrogen is set pH value 6.8-7.5.
Described changing food waste high speed bioremediation, ultrahigh-temperature acidication reaction process is carried out in two-stage reactor, and first step temperature is controlled at the 65-68 degree; It is 5.5-6 that potential of hydrogen is set the pH value; The second stage is the transient response device, and temperature is controlled at the 60-63 degree, and it is 6-6.5 that potential of hydrogen is set the pH value; High temperature produces the methane reaction process and comprises at least 2 stage reactors.
Described changing food waste high speed bioremediation; In anaerobic digestion process, adopt the floating technology of natural pond slag that natural pond slag, solid digest are handled, the one, adopt high pressure reflow gas timing brute force to blow floating; Make natural pond slag and solid digest all floating; The 2nd, in each reactor drum, utilize autodigestion liquid to carry out low pressure and blow floating, keep natural pond slag and solid digest not to sink to the bottom, make anerobes fully contact the quickening digestion rate with digest.
A kind of changing food waste high speed biological treatment system; Be made up of at least three grades and above anaerobic digestion reaction vessel, buried design is adopted in systems engineering, and reactor drum is located under the face of land; Said anaerobic digestion reaction vessel comprises the ultrahigh-temperature reactor for hydrolysis and acidification; The high temperature methane-producing reactor stores natural pond slag insulation reaction device, stores natural pond liquid insulation reaction device; The ultrahigh-temperature reactor for hydrolysis and acidification is provided with through pretreated changing food waste import; The ultrahigh-temperature reactor for hydrolysis and acidification is provided with the gravity flow window with the shared partition wall bottom of high temperature methane-producing reactor and is communicated with the high temperature methane-producing reactor; Be provided with material conveying pipe between high temperature methane-producing reactor and the storage natural pond slag insulation reaction device, store slag insulation reaction device top, natural pond and be provided with spillway connection storage natural pond liquid insulation reaction device; In said ultrahigh-temperature reactor for hydrolysis and acidification, high temperature methane-producing reactor, be provided with well heater through the pipe connection therrmodynamic system; Lower peripheral wall is provided with thermal insulation layer on said each digestion reactor; Said high temperature methane-producing reactor, store the natural pond slag, the biogas discharge mouth of pipe that liquid insulation reaction device top, natural pond is provided with to be communicated with liquid level upper cavity wherein.
Described changing food waste high speed biological treatment system; The ultrahigh-temperature reactor for hydrolysis and acidification comprises reactor for hydrolysis and acidification and two zones of transient response device; Reactor for hydrolysis and acidification is provided with the gravity flow window with the shared partition wall bottom of transient response device and is communicated with the transient response device, and the transient response device is provided with the gravity flow window with the shared partition wall bottom of high temperature methane-producing reactor and is communicated with the high temperature methane-producing reactor.
Described changing food waste high speed biological treatment system; The high temperature methane-producing reactor comprises two, three or three above reactor drums that are connected successively; Each reactor head is all established the material inlet and product methane gas outlet pipe of adjustment acidity-basicity ph value, and the well heater of each reactor drum is provided with through the pipe connection therrmodynamic system separately.
Described changing food waste high speed biological treatment system; Ultrahigh-temperature reactor for hydrolysis and acidification, high temperature methane-producing reactor inner bottom part are equipped with the pipeline that blows floating, and the said conduit entrance that blows floating is introduced from its top and connected autodigestion fluid circulation and reflux gas high-pressure system.
Described changing food waste high speed biological treatment system contains pretreatment pool, oil trap, and the pond of getting the raw materials ready, the basic soln pond, said pretreatment pool top is provided with the changing food waste import, and pretreatment pool and oil trap bottom are communicated with, and pretreatment pool is provided with and separates the trench oil export; Oil trap is provided with overflow pipe and is communicated with the ultrahigh-temperature reactor for hydrolysis and acidification; Get the raw materials ready pond bottom is provided with submerged type reamer kibbler, oil trap, basic soln pond and get the raw materials ready and be provided with transferpump between the pond and be communicated with the pond of getting the raw materials ready.
Described changing food waste high speed biological treatment system contains the flash pond, and the middle part is provided with large diameter pipeline and communicates with the flash pond on last high temperature methane-producing reactor; Digesting material transport pipe, basic soln transport pipe and natural pond slag, natural pond liquid transport pipe are shared, are provided with switch valve between the pipeline, and each reactor head also is provided with temperature, acidometer is installed the mouth of pipe and self-circulating pump installation of window opening.
Useful positively effect of the present invention:
1, changing food waste high speed bioremediation of the present invention and system; Adopt the multistage anaerobic digestion process of ultrahigh-temperature, buried, tight type design that engineering design is adopted, a plurality of reactor drum lips and teeth link to each other; The rubbish biological treatment effect is good, and it implements to promote has good society and economic benefit.Not only can the high speed processing restaurant, changing food waste such as dining room leftovers leftovers, can also the high speed processing restaurant, the changing food waste in the sewage effluent of meal kitchen, dining room, can chop the source that sewer oil, rubbish pig produce fully off; Can also carry out a biological disposal upon at a high speed fowl and animal excrement rubbish and industry high-concentration organic sewage, suitability is strong.
2, changing food waste high speed bioremediation of the present invention and system are simple in structure, less investment
,Floor space is little, and comparing with the changing food waste biological treatment factory of same treatment ability only needs 1/10th investments; Efficient is high, adopts technologies such as ultrahigh-temperature acidication, multistage anaerobic digestion, natural pond slag be floating, has improved stability, the operability of digestion rate and Digestive tract greatly, and the refuse treatment cost is low
,Treatment plant also can reach profit even without the government finance subsidy.
3, changing food waste high speed bioremediation of the present invention and system; The sub product zero release that processing utensil rubbishes produces; Biogas, natural pond liquid, natural pond slag, sewer oil all utilize; The marsh gas power generation extra earning that is incorporated into the power networks, sewer oil is done the biodiesel raw material extra earning, and natural pond fertilizer gratuitously provides peripheral vegetables base to produce organic vegetable to improve that vegetables are worth or the organic fertilizer extra earning is processed in the dehydration of natural pond slag, oven dry; Changing food waste is collecting, is transporting, is handling, is utilizing omnidistance sealing can not produce secondary pollution.
Description of drawings
Fig. 1: changing food waste high speed biological treatment system structural representation of the present invention;
Fig. 2: changing food waste high speed biological treatment system principle of work synoptic diagram of the present invention.
Embodiment
Embodiment one: changing food waste high speed bioremediation of the present invention; At first changing food waste or high concentration organic sewage are carried out pre-treatment; Remove degrease and carry out preliminary acidication processing, regulate potential of hydrogen, carry out Anaerobic Digestion then; What the present invention was different with prior art is: said Anaerobic Digestion process adopts at least three grades of anaerobic reactors, and anaerobic digestion process adopts the ultrahigh-temperature anaerobic digestion process.The anaerobic reaction temperature is the highest near 70 degree, far above 55 present degree.
Generally adopt single-stage or two-stage anaerobic digestion technology at present both at home and abroad.Facts have proved; Adopt two-stage anaerobic digestion technology; Promptly create two different biological nutrition environment (like temperature, pH etc.) through two reactor drums; The reactor monolith digestive efficiency be can improve than single-stage (reactor drum) anaerobic digestion process, biogas output and the stability that increases Digestive tract increased.
And the present invention adopts multistage anaerobic digestion process, controls differing temps and pH value respectively, more helps specific anaerobic bacteria flora growth, has further improved digestive efficiency and digestion rate; Multistage anaerobic digestion process not only improves digestion rate but also has improved the stability and the operability of Digestive tract greatly, and each reactor drum of independent control can guarantee better that anaerobic digestion normally carries out; All right single collection dioxide gas improves methane content in the biogas.
Embodiment two: present embodiment changing food waste high speed bioremediation, anaerobic digestion process comprise that ultrahigh-temperature acidication and high temperature produce the methane reaction process, and ultrahigh-temperature reactor for hydrolysis and acidification temperature is controlled at the 65-68 degree, and it is 5.5-6 that potential of hydrogen is set the pH value; High temperature methane-producing reactor temperature is controlled at the 53-56 degree, and potential of hydrogen is set pH value 6.8-7.5.
Traditional organism anaerobic digestion process is thought in theory: natural anaerobic digestion process digestion temperature 10-26 degree, digestion period 40-60 days; Anaeration in normal temperature digestion process digestion temperature 35 degree, digestion period 20 days; Thermophilic digestion technology digestion temperature 55 degree, digestion period 15 days.Temperature 35 degree in the general employing of China's organism anaerobic digestion process at present.
The present invention then has breakthrough to this, is placed on the ultrahigh-temperature hydrolytic process separately in the reactor drum and carries out, and ultrahigh-temperature reactor for hydrolysis and acidification temperature is controlled at the 65-68 degree, and it is 5.5-6 that potential of hydrogen is set the pH value.
Fact proved that the organism anaerobic digestion temperature is controlled at 65-68 when spending, hydrolytic activity further improves, and can accelerate hydrolysis of organic matter speed.Anaerobic digestion process digestion temperature of the present invention is up to 68 degree, digestion period 10 days.The every raising 10 degree digestion rates of digestion temperature will double.
Embodiment three: present embodiment changing food waste high speed bioremediation; Different with embodiment two is: ultrahigh-temperature acidication reaction process is in two-stage reactor, to carry out; First step temperature is controlled at the 65-68 degree, and it is 5.5-6 that potential of hydrogen is set the pH value, and the second stage is the transient response device; Temperature is controlled at the 60-63 degree, and it is 6-6.5 that potential of hydrogen is set the pH value; High temperature produces the methane reaction process and comprises at least 2 stage reactors, like Fig. 1, shown in Figure 2.
Embodiment four: present embodiment changing food waste high speed bioremediation; Different with aforementioned each embodiment is: in the anaerobic treatment process; Adopt the floating technology of natural pond slag that natural pond slag, solid digest are handled; The one, adopt high pressure reflow gas regularly brute force blow floating, make natural pond slag and solid digest all floating, the 2nd, in each reactor drum, utilize autodigestion liquid to carry out low pressure blow floating (uninterruptedly circulating in 24 hours); Keep natural pond slag and solid digest not to sink to the bottom, make anerobes fully contact the quickening digestion rate with digest.
Embodiment five: present embodiment is a changing food waste high speed biological treatment system.Referring to Fig. 1, Fig. 2; Said changing food waste high speed biological treatment system is made up of at least three grades and above anaerobic digestion reaction vessel, and buried design is adopted in systems engineering, and reactor drum is located under the face of land; Said anaerobic digestion reaction vessel comprises ultrahigh-temperature reactor for hydrolysis and acidification 1; High temperature methane-producing reactor 3 stores natural pond slag insulation reaction device 4, stores natural pond liquid insulation reaction device 5; Ultrahigh-temperature reactor for hydrolysis and acidification 1 is provided with through pretreated changing food waste import; Ultrahigh-temperature reactor for hydrolysis and acidification 1 is provided with gravity flow window 1-1 with high temperature methane-producing reactor 3 shared partition wall bottoms and is communicated with the high temperature methane-producing reactor; Be provided with material conveying pipe between high temperature methane-producing reactor 3 and the storage natural pond slag insulation reaction device 4, store slag insulation reaction device 4 tops, natural pond and be provided with spillway 4-1 connection storage natural pond liquid insulation reaction device 5; In said ultrahigh-temperature reactor for hydrolysis and acidification, high temperature methane-producing reactor, be provided with well heater through the pipe connection therrmodynamic system; Lower peripheral wall is provided with thermal insulation layer on said each digestion reactor; The said high temperature methane-producing reactor and the biogas discharge mouth of pipe that stores the natural pond slag, liquid insulation reaction device top, natural pond is provided with to be communicated with liquid level upper cavity wherein.
Embodiment six: referring to Fig. 1, Fig. 2; Present embodiment changing food waste high speed biological treatment system; Different with embodiment five is: the ultrahigh-temperature reactor for hydrolysis and acidification comprises reactor for hydrolysis and acidification 1 and 2 two zones of transient response device; Reactor for hydrolysis and acidification 1 is provided with gravity flow window 1-1 with transient response device 2 shared partition wall bottoms and is communicated with transient response device 2, and transient response device 2 is provided with gravity flow window 2-1 with high temperature methane-producing reactor 3 shared partition wall bottoms and is communicated with high temperature methane-producing reactor 3.
Embodiment seven: referring to Fig. 1, Fig. 2; Present embodiment changing food waste high speed biological treatment system; Different with embodiment six is: the high temperature methane-producing reactor comprises be connected successively two to zone more than three or three; The material inlet and product methane gas outlet pipe of adjustment acidity-basicity ph value all established at each regional top, reaches the well heater that respectively is provided with independent heating and passes through the pipe connection therrmodynamic system.
Embodiment eight, present embodiment changing food waste high speed biological treatment system; Different with embodiment five or embodiment six is: said ultrahigh-temperature reactor for hydrolysis and acidification, high temperature methane-producing reactor inner bottom part are equipped with the pipeline that blows floating, and the said conduit entrance that blows floating is introduced from its top and connected autodigestion fluid circulation and reflux gas high-pressure system.
Changing food waste high speed biological treatment system of the present invention contains pretreatment pool 9, oil trap 6; The pond 7 of getting the raw materials ready, basic soln pond 8, said pretreatment pool top is provided with changing food waste import 9-1; Pretreatment pool 9 is communicated with oil trap 6 bottoms, and pretreatment pool is provided with and separates trench oil export 9-2; Oil trap 6 is provided with overflow pipe and is communicated with ultrahigh-temperature reactor for hydrolysis and acidification 1; 7 bottoms, pond of getting the raw materials ready are provided with submerged type reamer kibbler, oil trap 6, basic soln pond 8 and get the raw materials ready and be provided with transferpump between the pond 7 and be communicated with the pond of getting the raw materials ready.
Changing food waste high speed biological treatment system of the present invention contains flash pond 11, and the middle part is provided with large diameter pipeline and communicates with flash pond 11 on last high temperature methane-producing reactor; Digesting material transport pipe, basic soln transport pipe and natural pond slag, natural pond liquid transport pipe are shared, are provided with switch valve between the pipeline, and each reactor head also is provided with temperature, acidometer is installed the mouth of pipe and self-circulating pump installation of window opening.
Changing food waste high speed bioremediation of the present invention and system, treating processes is summarized as follows:
1,Contain a large amount of changing food wastes in restaurant, meal kitchen, the dining room sewage effluent; Adopt applicant's patented technology (carburetion septic tank; The patent No.: ZL2003.20030301.X), can the changing food waste in restaurant, meal kitchen, the dining room sewage effluent thoroughly be separated, be stored in the isolation tank; Same restaurant, dining room leftovers leftovers changing food waste together, collected by the soil pick-up special transport vehicle every day.
2, changing food waste is put into pretreatment pool 9, through the pretreatment pool deposition, solid refuse is deposited in the bottom, pond, and sewer oil swims in the sewage surface; Isolated sewer oil is cast aside out from separation trench oil export and is poured deposition the oil reservoir into, stores, and extracts out when oil reservoir completely is full of and sells.
3, pretreatment pool is provided with and heats pipeline, and heating changing food waste 33-36 degree also is provided with natural pond slag conduit entrance, adds part natural pond slag (anaerobic species), makes changing food waste shift to an earlier date acidication; Pretreatment pool has window to communicate with the oil trap bottom, and solid changing food waste and sewage get into oil trap from the pretreatment pool bottom, and the sewer oil that swims in the sewage surface is isolated in the pretreatment pool.
Can overflow automatically when 4, the sewage in the oil trap completely is full of; Get into the ultrahigh-temperature reactor for hydrolysis and acidification from overflowing meal kitchen sewage import (system the unloading phase reactor drum in the Digestive system water surface low; Overflow pipe is provided with gate, and gas overflows in the prophylactic response device, and gate was often opened when system was normal); The meal kitchen solid refuse of half acidication and part of contaminated water extracted out from oil trap get into the pond of getting the raw materials ready, the bottom, pond of getting the raw materials ready is provided with submerged type reamer kibbler, with the refinement of solid changing food waste grinding particle size; Simultaneously part basic soln in the basic soln pond is carried the material pump through basic soln and extract out to get into the pond of getting the raw materials ready, the changing food waste pH value of half acidication is in the 5.5-6 scope in adjustment, and acidity is crossed conference impact-response device Digestive tract.
5, an anerobes breeding multiplication generation needs about 5 hours, and treatment unit treatment capacity every day is divided into 5 chargings, and digestion reactor is set per about 5 hours and advanced a defective material; Refinement becomes highly filled organic sewage through the kibbler grinding particle size for meal kitchen solid refuse and part of contaminated water, after basic soln adjustment acidity-basicity ph value, proposes the extraction of material pump with the digestion raw material and gets into the ultrahigh-temperature acidification reactor from the feed pipe inlet; The digestion raw material is carried and is expected that pump intake is provided with filter screen and stops that the above solids of 1cm gets in the ultrahigh-temperature acidification reactor.
When 6, highly filled organic sewage gets into the ultrahigh-temperature reactor for hydrolysis and acidification, the natural pond liquid of certain proportion (about 30% inlet amount), natural pond slag (anaerobic species) from the outlet of natural pond slag with natural pond liquid outlet extract out from feed pipe inlet entering ultrahigh-temperature reactor for hydrolysis and acidification and mix.
7, after highly filled organic sewage and a certain proportion of natural pond liquid, natural pond slag get into the ultrahigh-temperature reactor for hydrolysis and acidification, blow floating through the pipeline that blows floating, reach thorough mixing with reflux gas or self-circulation Digestive system.
8, the each constantly charging of system constantly flows into ultrahigh-temperature transient response device, the high temperature methane-producing reactor Digestive system window below the ultrahigh-temperature reactor for hydrolysis and acidification automatically.
When 9, continuous charging every day makes ultrahigh-temperature reactor for hydrolysis and acidification, ultrahigh-temperature transient response device, high temperature produce each reactor drum of methane device completely to be full of (accounting for system's useful capacity 95%); With natural pond fertilizer from the natural pond fertile outlet extract from the natural pond fertile import out and get into and store natural pond slag insulation reaction device, extract the fertile amount in natural pond out and be not more than one day inlet amount; Store slag insulation reaction device top, natural pond and be provided with window, the natural pond is fertile in deposition, and the natural pond slag is retained in and stores in the slag insulation reaction device of natural pond, and natural pond liquid is separated automatic inflow and stored in the liquid insulation reaction device of natural pond.
10, according to Digestive system pH value on-line monitoring numerical value in each reactor drum; When adjusting each reactor drum Digestive system pH value; Natural pond liquid, natural pond slag from the outlet of natural pond slag and the outlet of natural pond liquid extract out from the import of adjustment material conduit get into ultrahigh-temperature transient response device, high temperature produces each reactor drum of methane, in promote pH with the Digestive system potential of hydrogen and reach normal value; When descending greatly, the pH value puies forward material pump delivery basic soln neutralizing acid basicity with basic soln.
11, according to each reactor drum Digestive system on-line temperature monitoring numerical value, when adjusting each reactor drum Digestive system temperature respectively, all be provided with and independently heat pipeline and import and export and to heat with 80-90 degree hot water circulation respectively, heat pipe connection combustion gas unpressurized hot water boiler; Ultrahigh-temperature reactor for hydrolysis and acidification design temperature 65-68 degree, ultrahigh-temperature transient response device device temperature 60-63 degree, high temperature methane-producing reactor design temperature 53-56 degree stores natural pond slag, natural pond liquid insulation reaction device design temperature 33-36 degree; About each reactor drum, the 4-5cm of spraying polyurethane foaming layer all around, increase each reactor drum insulated capacity.
12, digest fast in order to quicken highly filled organic sewage; Each reactor drum all is provided with the entrance that independently blows floating and connects self-circulation system; Uninterrupted low pressure Digestive system blowed floating in 24 hours; The recycle system is provided with strumbox, filters the above solid matter of 0.6cm and gets into circulating line, and prevention pipeline spout stops up; The pipeline that blows floating also connects gas compressor and pressure pan, can set the reflux gas high pressure as required respectively and blow floating unlatching number of times and time.
13, being provided with large diameter pipeline in the middle part of on last high temperature methane-producing reactor communicates with the flash pond; If appearring in system exception, pressure (system is made as normal pressure) can Digestive system be extruded outside the system; The flash pond can admit Digestive system to avoid Digestive system to overflow, and be provided with warning device (jingle bell) remind operator in time handle (system the unloading phase reactor drum in the Digestive system water surface low, overflow pipeline and be provided with gate; Gas overflows in the prophylactic response device, installs when normal gate and often opens).
14, digesting material transport pipe, basic soln transport pipe and natural pond slag, natural pond liquid transport pipe are common uses a pipeline, utilizes gate opening or closes and carry certain liq to get in the specified reactor drum or outward transport natural pond slag, natural pond liquid; Online concentration analyzer is installed on the transport pipe, in time controls various liquid solid content, also be provided with online TDS monitor in each reactor drum, in time grasp solid digestibility in the Digestive system, improve the Digestive tract operability.
15, according to treatment plant's periphery customer need, from store natural pond slag, natural pond liquid insulation reaction device, extract natural pond slag, natural pond liquid out with the fertile special car in natural pond, deliver to specified storage pool of user or field; Also can the organic fertilizer extra earning be processed in the dehydration of natural pond slag, oven dry.
16, highly filled organic sewage is in reactor drum; (the ultrahigh-temperature reactor for hydrolysis and acidification is set pH value 5.5-6 at anerobes, high temperature and normal ph; Ultrahigh-temperature transient response device is set pH value 6-6.5, high temperature methane-producing reactor setting pH value 6.8-7.5) under the condition, each reactor drum output gas all in the microbiological anaerobic digestive process; Biogas is discharged from the dioxide gas outlet conduit from methane outlet pipeline, dioxide gas; Gas collects with pipeline, connects large-scale gas storage tank and gas respectively and utilizes equipment, the dioxide gas that treatment system the produces Digestive system in the system that blows floating that refluxes.
At present domestic and international existing Anaerobic Digestion system generally adopts single-stage or two-stage reactor, and the ground type metal construction is generally adopted in engineering design, can make outfit equipment be convenient to Maintenance and Repair.Underground type, tight type, staged reactor design are adopted in treatment system engineering design of the present invention, and seven anaerobic digestion reaction vessel you are part of me I am part of you one integrated mass are independently saved material of construction, adopt concrete structure cheap.With the changing food waste of 100 tons/day of the designing treatment factory that carries out a biological disposal upon at a high speed is example; The changing food waste biological treatment factory of gross investment and same treatment ability compares and only needs 1/10th investments (Lanzhou was built up the whole nation first was adopted the changing food waste biological treatment factory of anaerobic digestion process to be completed in December, 2010; Get into the debug phase; Invest 11,300 ten thousand yuan, 200 tons of day processing utensil rubbishes).Existing Anaerobic Digestion system adopts the main consideration of ground type design support equipment to overhaul easily; Because can not stop production after the treatment unit self-starting; The treatment unit start-up cost is high; The social concern that stopping production can cause heavy economic losses and rubbish to stack nowhere adopts metal construction to consider the firm performance and the closed performance (anerobes is afraid of that oxygen can not have some air leaking) of treatment system; Adopt the design of single-stage or two-stage reactor mainly to consider to reduce investment outlay cost.Treatment system engineering design of the present invention has solved the maintenance of support equipment well; Guarantee that overhaul of the equipments, replacing do not stop production; It is few that treatment system is equipped with equipment, only needs several water pumps, is exactly that water pump has been broken and changed one and tood many or too much for use 20 minutes; The pipeline that heats in the treatment system, blows floating adopts the corrosion-resistant stainless steel pipe, and overhaul need not stop production more than 20 years; Adopt the cheap minimizing cost of investment of concrete structure engineering.Buried treatment system is less investment, land occupation not only, and can also the defense sector shake, the calorific loss of anti-thunderbolt and long service life, minimizing treatment system.
Claims (10)
1. changing food waste high speed bioremediation; At first changing food waste is carried out pre-treatment, remove degrease and carry out preliminary acidication processing, regulate potential of hydrogen; Carry out Anaerobic Digestion then; It is characterized in that: said Anaerobic Digestion process adopts at least three grades of anaerobic digestion reaction vessels, and anaerobic digestion process adopts the ultrahigh-temperature anaerobic digestion process, and said anaerobic digestion process comprises that ultrahigh-temperature acidication and high temperature produce the methane reaction process; Ultrahigh-temperature acidication temperature of reaction is controlled at the 65-68 degree, and it is 5.5-6 that potential of hydrogen is set the pH value; High temperature produces the methane reaction temperature and is controlled at the 53-56 degree, and it is 6.8-7.5 that potential of hydrogen is set the pH value.
2. changing food waste high speed bioremediation according to claim 1; It is characterized in that: in anaerobic digestion process, adopt the floating technology of natural pond slag that natural pond slag, solid digest are handled, the one, adopt high pressure reflow gas timing brute force to blow floating; Make natural pond slag and solid digest all floating; The 2nd, in each reactor drum, utilize autodigestion liquid to carry out low pressure and blow floating, keep natural pond slag and solid digest not to sink to the bottom, make anerobes fully contact the quickening digestion rate with digest.
3. a changing food waste high speed bioremediation is at first carried out pre-treatment to changing food waste, removes degrease and carries out preliminary acidication processing; Regulate potential of hydrogen, carry out Anaerobic Digestion then, it is characterized in that: said Anaerobic Digestion process adopts at least three grades of anaerobic digestion reaction vessels; Anaerobic digestion process adopts the ultrahigh-temperature anaerobic digestion process; Said anaerobic digestion process comprises that ultrahigh-temperature acidication and high temperature produce the methane reaction process, and ultrahigh-temperature acidication reaction process is carried out in two-stage reactor, and first step temperature is controlled at the 65-68 degree; It is 5.5-6 that potential of hydrogen is set the pH value; The second stage is the transient response device, and temperature is controlled at the 60-63 degree, and it is 6-6.5 that potential of hydrogen is set the pH value; High temperature produces the methane reaction process and comprises second reactor at least.
4. changing food waste high speed bioremediation according to claim 3; It is characterized in that: in anaerobic digestion process, adopt the floating technology of natural pond slag that natural pond slag, solid digest are handled, the one, adopt high pressure reflow gas timing brute force to blow floating; Make natural pond slag and solid digest all floating; The 2nd, in each reactor drum, utilize autodigestion liquid to carry out low pressure and blow floating, keep natural pond slag and solid digest not to sink to the bottom, make anerobes fully contact the quickening digestion rate with digest.
5. changing food waste high speed biological treatment system; Be made up of at least three grades and above anaerobic digestion reaction vessel, it is characterized in that: buried design is adopted in systems engineering, and reactor drum is located under the face of land; Said anaerobic digestion reaction vessel comprises the ultrahigh-temperature reactor for hydrolysis and acidification; The high temperature methane-producing reactor stores natural pond slag insulation reaction device, stores natural pond liquid insulation reaction device; The ultrahigh-temperature reactor for hydrolysis and acidification is provided with through pretreated changing food waste import; The ultrahigh-temperature reactor for hydrolysis and acidification is provided with the gravity flow window with the shared partition wall bottom of high temperature methane-producing reactor and is communicated with the high temperature methane-producing reactor; Be provided with material conveying pipe between high temperature methane-producing reactor and the storage natural pond slag insulation reaction device, store slag insulation reaction device top, natural pond and be provided with spillway connection storage natural pond liquid insulation reaction device; In said ultrahigh-temperature reactor for hydrolysis and acidification, high temperature methane-producing reactor, be provided with well heater through the pipe connection therrmodynamic system; Lower peripheral wall is provided with thermal insulation layer on said each digestion reactor; Said high temperature methane-producing reactor, store the natural pond slag, the biogas discharge mouth of pipe that liquid insulation reaction device top, natural pond is provided with to be communicated with liquid level upper cavity wherein.
6. changing food waste high speed biological treatment system according to claim 5; It is characterized in that: the ultrahigh-temperature reactor for hydrolysis and acidification comprises reactor for hydrolysis and acidification and two zones of transient response device; Reactor for hydrolysis and acidification is provided with the gravity flow window with the shared partition wall bottom of transient response device and is communicated with the transient response device, and the transient response device is provided with the gravity flow window with the shared partition wall bottom of high temperature methane-producing reactor and is communicated with the high temperature methane-producing reactor.
7. according to claim 5 or 6 described changing food waste high speed biological treatment systems; It is characterized in that: the high temperature methane-producing reactor comprises two, three or three above reactor drums that are connected successively; Each reactor head is all established the material inlet and product methane gas outlet pipe of adjustment acidity-basicity ph value, and the well heater of each reactor drum is provided with through the pipe connection therrmodynamic system separately.
8. changing food waste high speed biological treatment system according to claim 7; It is characterized in that: said ultrahigh-temperature reactor for hydrolysis and acidification, high temperature methane-producing reactor inner bottom part are equipped with the pipeline that blows floating, and the said conduit entrance that blows floating is introduced from its top and connected autodigestion fluid circulation and reflux gas high-pressure system.
9. changing food waste high speed biological treatment system according to claim 8; It is characterized in that: contain pretreatment pool, oil trap, the pond of getting the raw materials ready; The basic soln pond; Said pretreatment pool top is provided with the changing food waste import, and pretreatment pool and oil trap bottom are communicated with, and pretreatment pool is provided with and separates the trench oil export; Oil trap is provided with overflow pipe and is communicated with the ultrahigh-temperature reactor for hydrolysis and acidification; Get the raw materials ready pond bottom is provided with submerged type reamer kibbler, oil trap, basic soln pond and get the raw materials ready and be provided with transferpump between the pond and be communicated with the pond of getting the raw materials ready.
10. changing food waste high speed biological treatment system according to claim 9 is characterized in that: contain the flash pond, the middle part is provided with large diameter pipeline and communicates with the flash pond on last high temperature methane-producing reactor; Digesting material transport pipe, basic soln transport pipe and natural pond slag, natural pond liquid transport pipe are shared, are provided with switch valve between the pipeline, and each reactor head also is provided with temperature, acidometer is installed the mouth of pipe and self-circulating pump installation of window opening.
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| CN103725597A (en) * | 2013-12-31 | 2014-04-16 | 北京大学深圳研究生院 | Household garbage landfill treatment system and method |
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