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根据生活垃圾填埋场中存在厌氧、兼氧及好氧环境区域的特点和硝化反硝化的生物脱氮理论,构建了一种新型的具有脱氮功能的生物反应器填埋场。对新型脱氮生物反应器填埋场启动特性研究表明,通过48 d的启动运行,产甲烷生物反应器M1,M2对进水COD去除率已稳定在80%以上;硝化反应器N出水COD去除率、NH 4-N去除率均达到80%以上,硝化细菌的数量已达2.39×105(个.g.干垃圾-1)。这将有助于后续稳定运行阶段新型脱氮生物反应器填埋场对垃圾的降解,实现垃圾脱碳、脱氮的目的。 相似文献
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一、目的城市垃圾填埋场渗滤液及粪便水的处理一直是填埋场设计、运行和管理中非常棘手的问题。渗滤液是液体在填埋场重力流动的产物,主要来源于降水和垃圾本身的内含水。由于液体在流动过程中有许多因素可能影响到渗滤液的性质,包括物理因素、化学因素以及生物因素等,所以渗滤液的性质在一个相当大的范围内变动。一般来说,其pH值在4～9之间,COD在2000～62000mg/L的范围内,BOD5从60—45000mg/L,重金属浓度和市政污水中重金属的浓度基本一致。城市垃圾填埋场渗滤液是一种成分复杂的高浓度有机废水,若不加处理而直接排入环境,会造成严重的环境污染。以保护环境为目的,对渗滤液进行处理是必不可少的。二、渗滤液处理工艺的现状粪便水及垃圾渗滤液的处理方法包括物理化学法和生物法。物理化学法主要有活性炭吸附、化学沉淀、密度分离、化学氧 相似文献
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垃圾填埋场渗滤液具有水质、水量变化大,污染物浓度高且成分复杂,难于处理等特点。利用填埋场地区蒸发量远远高于降雨量的有利因素,将渗滤液回灌至填埋场表面,借助于表面蒸发和填埋层生物降解作用,可削减渗滤液水量、降低渗滤液有机污染浓度. 相似文献
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焦化废水脱氮技术有物理化学法、生物化学法等。生物化学法是较为经济、实效、无污染转移、操作简便易掌握的典型工艺技术。生物脱氮是利用微生物的生物化学作用,将废水中的氨氮经硝化和反硝化反应,转变成为无害的氮气而除去。 相似文献
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本文简要阐述垃圾填埋场渗滤液的产生原因、特性及危害,提出了几种垃圾填埋场渗滤液的处理方法,并分析提出在对渗滤液进行减量化的同时,综合几种方法的优点对垃圾填埋场进行综合整治,有效解决垃圾填埋场渗滤液环境污染的问题。 相似文献
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我国垃圾处理主要是卫生填埋,填埋的垃圾会产生大量的渗滤液,垃圾渗滤液成分比较复杂,主要污染物是有机物、氯氮、磷、重金属等,其CODcr可以达到上万mg／L,PH值一般在6.5-7.8之间,渗滤液对地表水及地下水污染严重,为了保护环境必须对其进行处理。1,国外与国内现状1.1,国外现状在国外发达国家,垃圾渗滤液必须经过严格处理才能排放。英国通过宪法规定,垃圾填埋场必须有相应的渗滤液处理设施,才准予运行。在垃圾渗滤液处理技术上,国外发达国家和部分发展中国家一般采用生物处理法、物理化学法、垃圾渗滤液回灌法和垃圾渗滤液经过预处理后,排入当地的污水处理系统进行处理等方法。 相似文献
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垃圾清理场中的渗滤液中含有丰富的物质成分,再加上其理化特性会随着时间的变化而变化,展示出复杂化特点。本文根据以往工作经验,对垃圾填埋场渗滤液溶解性有机质特性进行总结,并从活性炭吸附技术、膜分离技术、臭氧氧化法、光催化氧化法四方面,论述了垃圾填埋场渗滤液溶解性有机质去除技术的应用类型。 相似文献
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UASB-SBR联用工艺处理垃圾渗沥液 总被引：1，自引：0，他引：1
实践证明UASB-SBR联用技术对垃圾渗沥液进行处理,CODcr去处率可以达到90%以上,出水可达到《污水排入城市下水道水质标准》。 相似文献
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BackgroundThe amount of municipal solid waste (MSW) gradually increased along with the rapid development of modern cities. A large amount of landfill leachate are generated with excessive chemical oxygen demand (COD), which create a great deal of pressure on the environment-friendly treatment process. Anaerobic digestion is an ideal technique to solve the above problem.ResultsA thermophilic granular sludge was successfully adapted for anaerobic digestion of MSW leachate (from an aging large-scale landfill) for methane production. The COD degradation efficiency improved by 81.8%, while the methane production rate reached 117.3 mL CH4/(g VS d), which was 2.34-fold more than the control condition. The bacterial and archaeal communities involved in the process were revealed by 16S rRNA gene high-throughput pyrosequencing. The richness of the bacterial community decreased in the process of thermophilic granular sludge, while the archaeal community structure presented a reverse phenomenon. The bacterial genus, Methanosaeta was the most abundant during the mesophilic process, while Methanobacterium, Methanoculleus, Methanosaeta and Methanosarcina were more evenly distributed. The more balanced community distribution between hydrogenotrophic and acetotrophic methanogens implied a closer interaction between the microbes, which further contributed to higher methane productivity. The detailed relationship between the key functional communities and anaerobic digestion performances were demonstrated via the multivariate canonical correspondence analysis.ConclusionsWith the assistance of adaptive thermophilic granular sludge, microbial community structure was more evenly distributed, while both of COD degradation rate and methane production was improved during anaerobic digestion of MSW landfill leachate.How to cite: Feng S, Hou S, Huang X, et al. Insights into the microbial community structure of anaerobic digestion of municipal solid waste landfill leachate for methane production by adaptive thermophilic granular sludge. Electron J Biotechnol 2019;39. https://doi.org/10.1016/j.ejbt.2019.04.001. 相似文献
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BackgroundThe determination of kinetic parameters and the development of mathematical models are of great interest to predict the growth of microalgae, the consumption of substrate and the design of photobioreactors focused on CO2 capture. However, most of the models in the literature have been developed for CO2 concentrations below 10%.ResultsA nonaxenic microalgal consortium was isolated from landfill leachate in order to study its kinetic behavior using a dynamic model. The model considered the CO2 mass transfer from the gas phase to the liquid phase and the effect of light intensity, assimilated nitrogen concentration, ammonium concentration and nitrate concentration. The proposed mathematical model was adjusted with 13 kinetic parameters and validated with a good fit obtained between experimental and simulated data.ConclusionsGood results were obtained, demonstrating the robustness of the proposed model. The assumption in the model of DIC inhibition in the ammonium and nitrate uptakes was correct, so this aspect should be considered when evaluating the kinetics with microalgae with high inlet CO2 concentrations.How to cite: Saldarriaga L F, Almenglo F, Ramírez M, et al. Kinetic characterization and modeling of a microalgae consortium isolated from landfill leachate under a high CO2 concentration in a bubble column photobioreactor. Electron J Biotechnol 2020;44. https://doi.org/10.1016/j.ejbt.2020.01.006. 相似文献
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填埋气体中的甲烷含量较高,且具有较高的热值,是一种利用价值较高的清洁燃料。如产量较大,加以回收利用,既可以达到温室气体减排目的,又可减缓社会能源需求压力。采用改进的层次分析法(AHP)从经济、技术、环境和社会四个方面建立了一整套评选指标系统,并以三个填埋场为实例,为填埋场选取合适的气体处置方法起到一定的指导作用。 相似文献
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垃圾的处理方式一般分为卫生填埋、分类收集、焚烧处理等处理方式,垃圾填埋场主要是采用卫生填埋方式下的垃圾集中堆放场地。但是在封场之后的维护工作很容易被人们忽视,从而引起很多问题,本文主要从封场方案设计、封场后维护内容等方面论述封场设计和封场后维护的重要性,并针对封场后易发事故提出其相对应的补救措施。 相似文献
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国内外生活垃圾处理技术现状与发展趋势 总被引：1，自引：0，他引：1
随着世界经济的发展,生活垃圾与日俱增。目前,国内外生活垃圾处理技术主要有堆肥、填埋、焚烧和厌氧发酵技术,从节能减排和循环经济的角度看,垃圾分选,垃圾回收利用,垃圾焚烧发电,垃圾的综合处理是未来的一个发展趋势。 相似文献