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大型准好氧填埋场渗滤液水质特性的研究 总被引:5,自引:2,他引:3
为进一步验证准好氧填埋技术的实用性,在成都市长安垃圾填埋场内进行了三个规模均为10 m×10 m×5 m的准好氧填埋单元试验研究,并分别对渗滤液的pH值、VFA、COD、BOD5和NH4+-N进行了分析.结果表明:对渗滤液中COD、BOD5的降解效果均较好,在分别经过742、704、697 d后,三个单元对COD的去除率分别达到了94.0%、98.0%和96.9%,对BOD5的去除率分别达到了99.4%、99.7%和99.6%;由于受到渗滤液收集管管径较小的限制,对NH4+-N的降解效果较差,因此需要根据准好氧填埋场的规模来调整渗滤液收集管的管径. 相似文献
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混凝吸附-两段SBR法处理垃圾渗滤液 总被引:3,自引:0,他引:3
利用赤泥制备复合混凝剂PAFCS(聚合硫酸氯化铝铁)并以炉渣作为吸附剂对垃圾渗滤液进行预处理,对SS和色度的去除率分别为84%和92%,对COD的去除率可达53.3%,还提高了渗滤液的可生化性.然后采用两段SBR法对垃圾渗滤液进行生化处理,结果显示通过对降解COD和氨氮的两类微生物分别进行培养,保持了较高的生物活性,进而提高了对此类高浓度难降解废水的处理效率.通过两段SBR处理以后,COD、BOD和氨氮的去除率分别为88%、94%和89%,出水水质达到了国家<生活垃圾填埋污染控制标准>(GB 16889-1997)的二级标准. 相似文献
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依据准好氧填埋原理,设计了准好氧垃圾填埋模拟柱,按照L4(2^3)正交实验表安排了正交实验,实验结果表明,水力负荷对准好氧填埋模拟柱氨氮的去除有显著的影响,回灌频率次之;准好氧填埋可显著缩短垃圾体稳定的时间,是一种值得推广的垃圾最终处理方式。 相似文献
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利用SBR反应器,以曝气量作为主要控制条件、以垃圾渗滤液作为培养基质来培养好氧颗粒污泥,研究好氧颗粒污泥的培养以及对垃圾渗滤液的处理效果.结果表明:在0.08、0.003 m3/h两种曝气量下均成功培养出好氧颗粒污泥,但其形态存在较大差别,高曝气量下形成的颗粒污泥结构紧密、粒径小、沟壑和孔道较多,而低曝气量下形成的颗粒污泥结构松散、沟壑和孔道较少,但粒径较大.当进水COD为900~1 200 mg/L时,低曝气量系统对COD的去除率可达93%左右,高曝气量系统的为80%;在不同的曝气量下,对TP的去除率均在60%左右;曝气量对硝化的影响较大,高曝气量下好氧颗粒污泥对氨氮的去除率能达到90%,高于低曝气量下对氨氮的去除率;与低曝气量下形成的颗粒污泥相比,高曝气量下形成的好氧颗粒污泥能更好地适应垃圾渗滤液中的高浓度游离氨. 相似文献
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填埋方式对污泥填埋稳定性的影响 总被引:3,自引:0,他引:3
参考垃圾填埋场经验,采用模拟填埋场,对污泥分别进行准好氧填埋和厌氧填埋,并定期监测渗滤液水质,利用指数法对两种填埋场的稳定化进行评价.结果表明,与厌氧填埋相比,准好氧填埋方式下污泥容重、密度和孔隙度的增长速度更快;并且准好氧填埋方式更有利于填埋体中污染物的降解,渗滤液中的污染物浓度更低;准好氧填埋场的稳定化速率要大于厌氧填埋场:准好氧填埋场在封场10周后即可达到二级稳定、渗滤液水质达到二级排放标准,而厌氧填埋场在封场30周后才能达到此标准. 相似文献
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以规模为100 t/d的某生活垃圾填埋场渗滤液处理工程为依托,开发了有效的渗滤液回灌结构,最大水力负荷达0.45 m3/(m2·d).设计了单层间歇曝气、双层间歇曝气、连续曝气3种微氧运行工况,分析了不同水力负荷、曝气负荷对渗滤液中COD、NH3-N去除效果的影响.结果表明:最佳间歇微氧渗滤液回灌运营工况是单层间歇曝气,其中水力负荷为0.45 m3/(m2·d)、曝气负荷为6.75 m3风量/(m3垃圾·d).回灌处理出水水质稳定,受进水浓度影响较小,出水COD<1 500 mg/L、NH3-N<900 mg/L,最低出水NH3-N达400 mg/L.该负荷条件下加大曝气量,如双层间歇曝气、连续曝气对COD的去除效果影响不大,对NH3-N的去除效果略有提高. 相似文献
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There is an increasing need for engineered liners to prevent the escape of leachate and to control the migration of landfill gas. This has been influenced by new European and UK legislation and codes of practice.
General principles of site design are explained, followed by a review of the advantages and disadvantages of different liner systems, including mineral liners (natural clay, mudrocks and soil/bentonite admixtures), geomembranes and composite liners.
The need for conservative factors of safety in site design and high standards of quality control, involving full-time supervision and independent certification of the installation works, are considered essential to ensure the effectiveness of the barrier.
There is no one ideal liner material. Composite mineral/geomembrane liners provide the highest degree of security against leakage and, as such, should be considered as 'the norm'rather than for use only in particularly high-risk situations. 相似文献
General principles of site design are explained, followed by a review of the advantages and disadvantages of different liner systems, including mineral liners (natural clay, mudrocks and soil/bentonite admixtures), geomembranes and composite liners.
The need for conservative factors of safety in site design and high standards of quality control, involving full-time supervision and independent certification of the installation works, are considered essential to ensure the effectiveness of the barrier.
There is no one ideal liner material. Composite mineral/geomembrane liners provide the highest degree of security against leakage and, as such, should be considered as 'the norm'rather than for use only in particularly high-risk situations. 相似文献
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南方山谷型填埋场渗滤液产量及水位控制措施 总被引:2,自引:0,他引:2
在我国南方建成的第一批山谷型填埋场大多存在渗滤液产量大、堆体中渗滤液水位高的问题。基于对南方几个典型填埋场的现场调查和相关测试结果,从水量平衡的角度分析了影响山谷型填埋场渗滤液产量的关键因素,探讨了我国现有山谷型垃圾填埋场在渗滤液产量及水位控制方面存在的问题,并借鉴国内外相关工程经验教训提出了一些改进措施(包括采用带有垂直防渗体的截洪沟来控制场外汇水区域地下径流补给量、采用新型临时覆盖材料及工艺避免在堆体中形成渗滤液阻滞层、渗滤液收集与导排系统的防淤堵设计及淤堵反冲洗维护措施等)。 相似文献
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Keith Knox 《Water research》1985,19(7):895-904
Results are presented on the treatment of leachate to remove ammonia by biological nitrification. Outdoor activated sludge and trickling filter pilot plants were operated for 2 years at a major co-disposal landfill. Leachate ammonia nitrogen concentrations ranged from 150 to 550 mg l?1 while TOC concentrations ranged from 200 to 500 mg l?1. Very little of the TOC was degradable and BOD: NH3-N ratios were typically 1:3.Nitrification was successfully established in both plants, and curves were established for the response of the kinetics to different temperatures. Maximum ammonia removal rate in the activated sludge plant was at least 131 g N kg VSS?1 day?1 achieved at an average temperature of 13°C. Maximum removal rate in the trickling filter was 309 mg N m?2 day?1, at 16°C.Operating problems and strategies for full-scale treatment are discussed. 相似文献
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浓缩液回灌对垃圾填埋体水位及稳定性的影响 总被引:3,自引:0,他引:3
成都长安填埋场渗滤液反渗透处理工艺日产260 t浓缩液,拟在填埋场进行回灌处理,回灌工程实施前需评估回灌工程对垃圾填埋体稳定性的影响.在该填埋场工程地质与水文地质勘查结果的基础上,利用GMS软件开展了垃圾填埋体非饱和一饱和三维渗流分析,模拟和预测了浓缩液回灌前后填埋体内渗滤液水位变化.基于渗流分析结果,利用Slope/... 相似文献
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Leachate Collection, Treatment and Disposal 总被引:10,自引:0,他引:10
H. D. ROBINSON BSc M. J. BARR PhD S. D. LAST BSc CEng MICE 《Water and Environment Journal》1992,6(4):321-332
As landfills become larger, the enormous quantities of putrescible wastes which they contain have increased the potential to generate highly polluting leachates as they decompose anaerobically over many years. If severe environmental impacts are to be avoided, operators must control these liquors: many landfill proposals stand or fall on the ability of the operator to demonstrate that leachate can be collected, managed and disposed of in an environmentally acceptable manner. During the early years of tipping in containment cells, high BOD and COD values (to 50 000 mg/l or more) are measured, with very high ammonia concentrations (to more than 1000 mg/l as N) persisting for many years.
The authors have been involved with the full-scale on-site treatment of leachates to high standards in automated aerated lagoon plants since the early 1980s. The first plant was constructed in 1982, and a further seven have since been built at landfills throughout the UK, with many more at various stages of design and construction – both in the UK and overseas.
This paper describes detailed operational experiences from several of these landfill sites, with particular emphasis on the reduction of ammonia concentrations to low values. The use of reed-bed treatment schemes as effluent polishing facilities is also discussed. 相似文献
The authors have been involved with the full-scale on-site treatment of leachates to high standards in automated aerated lagoon plants since the early 1980s. The first plant was constructed in 1982, and a further seven have since been built at landfills throughout the UK, with many more at various stages of design and construction – both in the UK and overseas.
This paper describes detailed operational experiences from several of these landfill sites, with particular emphasis on the reduction of ammonia concentrations to low values. The use of reed-bed treatment schemes as effluent polishing facilities is also discussed. 相似文献
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B. E. Purcell BEng MSc DIC PhD A. P. Butler BSc MSc DIC PhD FRMetS C. J. Sollars BSc MSc DIC PhD S. E. Buss BA MSc DIC MRSC CChem FGS 《Water and Environment Journal》1999,13(2):107-111
The operational management of landfills is currently being reviewed in the UK and Europe. In the UK, the 'flushing bioreactor' approach to landfilling involves (a) enhancing microbially mediated degradation of domestic waste to promote rapid waste stabilization, (b) increased methane recovery, and (c) reduced timescales to final landfill stabilization. Flushing oeprations under bioreactive conditions could be used to optimize the removal of ammoniacal nitrogen from landfilled waste. In this study, the flushing of ammonia from pulverized domestic waste was investigated using laboratory-scale test cells to simulate landfill conditions. A simple mathematical model, based on test-cell water balance, was used to describe the latter stages of ammonia reduction. 相似文献
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垃圾渗滤液的混凝--吸附预处理研究 总被引:41,自引:3,他引:38
研究表明,采用PAC作混凝剂、焦炭作吸附剂,可有效去除渗滤液中的COD 和各部分重金属离子。PAC和焦炭投量分别为400 mg/L和8 ~10 g/L时,COD 去除率达58 .9 % ,重金属离子的去除率均达60 % 左右,其中对Cu 的去除近100 % ;混凝和吸附对各污染物的去除具有互补性,因而此工艺具有良好的运行灵活性和稳定性。混凝对渗滤液色度具有明显的去除效果(68 % ) ;焦炭吸附中存在明显的竞争现象,其中对COD 的吸附具有明显的竞争优势 相似文献