CN103302077A - Control process for treating urban garbage by aerobic bioreactor landfill - Google Patents
Control process for treating urban garbage by aerobic bioreactor landfill Download PDFInfo
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- CN103302077A CN103302077A CN2013102067622A CN201310206762A CN103302077A CN 103302077 A CN103302077 A CN 103302077A CN 2013102067622 A CN2013102067622 A CN 2013102067622A CN 201310206762 A CN201310206762 A CN 201310206762A CN 103302077 A CN103302077 A CN 103302077A
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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
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Abstract
The invention discloses a control process for treating urban garbage by an aerobic bioreactor landfill. The control process is that the aerobic bioreactor landfill is adopted to treat the urban garbage for quick biodegradation, the temperature and the compaction density of landfilled garbage are properly controlled, the temperature in the running process is 30-40 DEG C, and the compaction density of the garbage is 450-650kg/m<3>. By controlling the temperature and the compaction density in the running process of the aerobic bioreactor landfill, the biodegradation speed of the landfilled garbage can be effectively increased, the leachate treatment difficulty and cost of the garage landfill are lowered, the stabilization process of the landfill is accelerated, and the effective capacity of the landfill is increased; the control process has an important meaning on the acceleration of repeated utilization of the landfill and resource utilization of mineralized garbage, impalement of sustainable development of the landfill, and the like.
Description
Affiliated technical field
The present invention relates to solid waste and process the technological parameter technical field of disposal technology, especially aerobe reactor landfill yard fast and stable.
Background technology
Along with the raising of expanding economy and the level of urbanization, domestic waste has become one of current serious social concern, and the harmless treatment of domestic waste becomes the emphasis of Eleventh Five-Year Plan and " 12 " environmental pollution improvement.As of paramount importance garbage sanitary filling in the urban garbage disposal disposal land resource of China's anxiety be can't bear the heavy load.Be effectively to accelerate the biodegradation of landfill waste, save land resource, prolong landfill yard service life, study novel garbage loading embeading technology becomes one of focus of domestic and international numerous environmentalists' concern.
The aerobe reactor Landfill is that a kind of safe and efficient rubbish is finally processed disposal technology, this technology is by governing factors such as aeration and leachate recirculations, for landfill yard provides sufficient oxygen and moisture supply, make the good microbial species group structure of formation in the rubbish, guarantee that microorganism keeps vigorous growth metabolism, thereby giving full play to biodegradation and transformation function to organic waste, is the most thorough, the Landfill the most fast of organic waste degraded in the garbage loading embeading technology.
The temperature of landfill waste and compacted density can directly affect interior microbial growth metabolism and enzymatic reaction speed, the solubility of an impact interior compound, and then affect character and the output of landfill percolate, affect biodegradation and the sedimentation of landfill waste, therefore, compacted density and temperature are the key factors that affects aerobe reactor Landfill Stabilization Rate process.Control suitable landfill waste compacted density and temperature, be of great significance for the activity of microorganism and rubbish enzyme in the raising landfill yard, the biodegradation of acceleration landfill waste, the stabilisation process tool of quickening landfill yard.
At present domestic research for the garbage loading embeading technology lays particular emphasis on anaerobism and semi-aerobic rubbish Landfill, for the control parameter of aerobe reactor landfill yard rarely seen report also, therefore, studying aerobic Bioreactor landfill technology parameter all is of great significance further exploration and the technological reserve of solid waste treating technology.
The present invention is based on this novel garbage loading embeading technology of aerobe reactor landfill yard, provide the operational factor of a kind of temperature of accelerating the aerobe reactor landfill yard and compacted density control, for the fast and stable of aerobe reactor landfill yard provides important technical support.
Summary of the invention
On the basis in view of existing background technology, the purpose of this invention is to provide the process control method that a kind of aerobe reactor landfill yard is processed domestic waste, make it to overcome the above deficiency of prior art.
The objective of the invention is to realize by following means:
The aerobe reactor landfill yard is processed the control technique of domestic waste: adopt the aerobe reactor landfill yard to process domestic waste and make it finish biodegradation, it is characterized in that, suitably control temperature and the compacted density of landfill waste, temperature controlled condition in the running is 30～40 ℃, and the compacted density of rubbish is 450～650kg/m
3
By simulated experiment, obtaining aerobe reactor landfill waste Optimal Temperature condition is 30～40 ℃, and control garbage truck density is 450～650kg/m
3Can effectively accelerate the stabilisation process of landfill yard, optimum compacted density is 550kg/m
3
Adopt means of the present invention, aerobe reactor landfill yard garbage degradation optimum compacted density or (with) under the temperature conditions, not only can reduce the garbage filter output of fluid, reduce leachate contamination load and intractability, also can effectively accelerate the biodegradation of organic waste in the landfill yard, improve the sedimentation rate of rubbish, make the landfill waste fast and stable.
The problems such as the percolate difficult treatment that research of the present invention faces for refuse landfill, the Solid Waste degraded is slow, the Landfill Stabilization Rate time is long, by research landfill waste compacted density and temperature controlled condition, promote growth of microorganism in the landfill yard, accelerate the degraded of rubbish organic principle, lower the leachate contamination load, save landfill yard operating cost, accelerate the Landfill Stabilization Rate process, improve landfill yard service life, reduce the landfill yard construction cost, economize the land resource.
Description of drawings
Accompanying drawing 1 temperature is to COD of waste leachate concentration as influencing factor curve map.
Accompanying drawing 2 temperature are to the influence curve figure of Solid Waste sedimentation rate.
Accompanying drawing 3 compacted densities are to the influence curve figure of percolate pH.
Accompanying drawing 4 compacted densities are to the influence curve figure of percolate COD.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
The rubbish sample is taken near the house refuse one section in the Chengdu 2 nd Ring Road north, reject the wherein materials such as partly plastic, glass, metal, rubble, before the landfill with the bulk refuse breaking to approximately about 5cm, mixing take the impact that overcomes scale effect (waste component as: more than the kitchen, 65.0%～68.0%; Bamboo wood, 12.0%～15.0%; Paper, 5.0%～7.0%; Plastics, 8.0%～10.0%; Textile, 1.5%～2.0%; Metal species, 0.5%～1.0%; Other compositions, 1.0%～3.0%).
Each is simulated bioreactor landfill and loads respectively rubbish 32.0kg, adopt aerobic land-fill method, and the enforcement temperature control measures makes temperature of reactor remain on respectively 20 ℃, 25 ℃, 30 ℃, 35 ℃ and 40 ℃, when the temperature of rubbish body in the reactor was lower than the temperature that experiment controls, attemperating unit was heated to the control temperature to analogue experiment installation automatically.
Suitable temperature is conducive to reduce the pollutional load of percolate.30 ℃～40 ℃ landfill temperature, can promote the biodegradation of rubbish, temperature is higher, the rate of decay of COD, ammonia nitrogen is faster in the percolate, COD reaches first stable and maintains about 2000mg/L, ammonia nitrogen drops to below the 25mg/L at 56～77d, is lower than the percolate from garbage filling field ammonia nitrogen discharge standard of country's " household refuse landfill sites pollute control criterion (GB16889-2008) " defined, than 20 ℃ and 25 ℃ respectively morning 63～84d and 28～49d qualified discharge.The difference of temperature causes that difference appears in microbial metabolism speed in each reactor, 30 ℃～40 ℃ temperature provides good growing environment for microorganism in the field, be conducive to improve a biomass of interior several functions bacterium with active, improve the ability of microorganism secretion relevant enzyme, accelerate an interior biochemical reaction speed, be conducive to improve the water quality of percolate, promote biodegradation and the conversion of pollutant, reduce the pollutional load of percolate.
Suitable temperature can be accelerated the biodegradation rate of landfill waste.Between 30 ℃～40 ℃, the sinking speed of TOC content decrease and rubbish body is fast in the rubbish, shows to be conducive to improve an interior microorganism under this temperature to the hydrolysis rate of easily biodegradable organics in the rubbish.The landfill middle and later periods, owing to the nutritional labeling that growth of microorganism is required is fewer and feweri, so that the concentration of COD and ammonia nitrogen sharply descends, the sedimentation of landfill waste and the fall off rate of TOC also are tending towards slow.Temperature is higher, and the biodegradation rate of organic waste is faster, and when finishing to landfill, the landfill temperature is that 20～25 ℃ solid refuse TOC is high by 5.3～15.7% than 30～40 ℃, accumulative total settling amount many 2.9～4.8%.Show that high temperature has promoted the biodegradation of organic matter in garbage, and make its degraded more thorough, improved the settling property of rubbish body, have positive role for the stabilisation process of accelerating landfill yard.
The output of percolate in the temperature effect landfill process.Under the different temperatures, the difference of percolate quantitative change is produced in the landfill place, mainly comes from the difference of water evaporation quantity due to moisture holding capacity, landfill yard biochemical reaction speed and the aeration of rubbish.Initial landfill stage, because high temperature has improved the activity of microorganism and enzyme, accelerated the process of enzymatic reaction, so that easy degradation material fast degradation in the rubbish, biochemical reaction speed is accelerated in, violent biochemical reaction again so that in the landfill yard temperature further raise, cause in the landfill system moisture evaporation rate to be accelerated.In the time of 20～25 ℃, since in the growth of microorganism fertility a little less than, garbage degradation speed is slow, permeance property is relatively poor, moisture holding capacity is strong, and water evaporation quantity is little, therefore moisture content decline is the slowest, the percolate cumulative production is also maximum in the landfill process, and the output than 30 ℃～40 ℃ many 10.4～48.8% respectively.Show in 30 ℃～40 ℃ temperature range, be conducive to reduce landfill percolate output, significant for the pressure that alleviates the landfill percolate processing.
In sum, 30～40 ℃ temperature conditions is conducive to reduce the pollutional load of percolate, promotes biodegradation and the conversion of pollutant.Simultaneously, be conducive to reduce landfill percolate output, significant for the pressure that alleviates the landfill percolate processing.
Embodiment 2,
Landfill waste sampling and composition are with embodiment one.
Each is simulated aerobe reactor landfill yard landfill waste compacted density and is respectively 450kg/m
3, 500kg/m
3, 550kg/m
3, 600kg/m
3, 650kg/m
3, 700kg/m
3, every group reaction device loads respectively 32kg rubbish after pretreatment, and every 5kg carries out a compacting, all adopts aerobic land-fill method, is 30～40 ℃ by temperature controller control temperature.208d is carried out in experiment, has monitored the variation tendency that reflects each reactor stabilisation process index in the landfill process.
3～10d of initial landfill stage, the Rapid Accumulation of the hydrolysis acidification product of organic waste is so that each reactor percolate pH all sharply descends, thereafter, because these metabolites are decomposed by Quick Oxidation under the aerobic condition, percolate pH value fast rise is stabilized between 8～9 at last.Garbage truck density is 450～650kg/m
3The time, the pH value all reaches 8 in 50d, and compacted density is 700kg/m
3Then just reach 8 at 153d, show that garbage truck density is 450～650kg/m
3, be conducive to the biodegradation of landfill waste, can effectively accelerate the stabilisation process of landfill yard.Wherein, garbage truck density is 550kg/m
3, the pH value namely reaches 8 in 30d, early than the landfill waste 30～156d of other compacted densities, show that garbage truck density is 550kg/m
3It is optimum compacted density.
Compacted density is 450～650kg/m
3The time, percolate COD and ammonia nitrogen concentration reach that the time of peak value is short, and decrease speed is fast, and the COD level was low when landfill finished, and the whole landfill cycle is produced reductive organic matter in the percolate (take COD as benchmark) total amount than 700kg/m
3Low 26.9%～56.4%; Ammonia nitrogen concentration tended towards stability in the past at 89d, dropped to below the 15mg/L, reached the ammonia nitrogen discharge standard of country's " household refuse landfill sites pollutes control criterion (GB16889-2008) " regulation, and compacted density is 700kg/m
3The time, just reach discharge standard to 186d.Wherein, compacted density is 550kg/m
3The time, it is short that percolate COD and ammonia nitrogen concentration reach the time of peak value, decrease speed is fast, and the COD level was low when landfill finished, and the whole landfill cycle is produced reductive organic matter in the percolate (take COD as benchmark) total amount than the landfill waste low 1.62%～16.34% of other compacted densities; Ammonia nitrogen concentration namely tended towards stability in the past at 30d, and qualified discharge, will early stablize 30～156d than the landfill waste of other compacted densities, showed that in compacted density be 550kg/m
3The time, oxygen content is sufficient in the rubbish body, and moisture being evenly distributed in the rubbish body, and the biodegradation condition of organic pollution is the most suitable.Excessive compacted density can make moisture distribution inequality in the rubbish body, and too small compacted density can make excess moisture ground evaporation in the rubbish body, and these two kinds of conditions all can be so that ammonia nitrogen accumulates in rubbish body, and the biodegradation of organic pollution also can be restricted.
As seen, when compacted density be 450～650kg/m
3The time, be conducive to the diffusion of oxygen and moisture in the rubbish body, make in the landfill waste oxygen and moisture distribution even, be conducive to improve the landfill yard microbial activity, thereby accelerate organic biodegradation and conversion in the landfill yard, the stabilisation process of acceleration landfill yard; Compacted density is 550kg/m
3The time be the compacted density of aerobe reactor landfill yard optimum.
Claims (2)
1. the aerobe reactor landfill yard is processed the control technique of domestic waste: adopt the aerobe reactor landfill yard to process domestic waste and make its fast degraded biologically, it is characterized in that, suitably control temperature and the compacted density of landfill waste, temperature controlled condition in the running is 30～40 ℃, and the compacted density of rubbish is 450～650kg/m
3
2. described aerobe reactor landfill yard is processed the control technique of domestic waste according to claim 1, it is characterized in that, the optimum compacted density of described rubbish is 550kg/m
3
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6024513A (en) * | 1996-11-14 | 2000-02-15 | American Technologies Inc | Aerobic landfill bioreactor |
| CA2320542C (en) * | 1999-12-21 | 2004-03-30 | Waste Management, Inc. | Sequential aerobic/anaerobic solid waste landfill operation |
| CN102380498A (en) * | 2011-08-03 | 2012-03-21 | 城市建设研究院 | Aerobic treating system and method for refuse landfill |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6024513A (en) * | 1996-11-14 | 2000-02-15 | American Technologies Inc | Aerobic landfill bioreactor |
| CA2320542C (en) * | 1999-12-21 | 2004-03-30 | Waste Management, Inc. | Sequential aerobic/anaerobic solid waste landfill operation |
| CN102380498A (en) * | 2011-08-03 | 2012-03-21 | 城市建设研究院 | Aerobic treating system and method for refuse landfill |
Non-Patent Citations (4)
| Title |
|---|
| 刘春尧: "准好氧填埋场稳定化进程的室内模拟研究", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅰ辑》, 15 December 2004 (2004-12-15) * |
| 孙晓蕾，刘丹，李启彬: "垃圾压实密度对模拟回灌型准好氧填埋场稳定进程影响的试验研究", 《安全与环境学报》, vol. 8, no. 3, 30 June 2008 (2008-06-30), pages 64 - 67 * |
| 李轶伦: "好氧回灌法处理城市垃圾填埋场渗滤液的机理研究", 《中国优秀博硕士学位论文全文数据库(硕士) 工程科技Ⅰ辑》, 15 May 2005 (2005-05-15), pages 16 - 18 * |
| 韩宝平: "《固体废物处理与利用》", 30 June 2010, article "固体废物的最终处理", pages: 303-307 * |
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Application publication date: 20130918 |