活性焦对垃圾渗滤液中难降解有机物的吸附及影响因素研究

发布时间：2018-04-22 02:40

本文选题：垃圾渗滤液 + 活性焦　；参考：《环境科学学报》2017年12期

【摘要】：垃圾渗滤液经预处理后与城市污水混合进行生物处理是较为有效的方法,但垃圾渗滤液中含大量难降解有机物,严重影响了城镇污水处理厂出水COD.因此,需强化垃圾渗滤液预处理过程,使其适用于生物处理.本研究采用活性焦吸附某垃圾焚烧发电厂垃圾渗滤液,发现活性焦对垃圾渗滤液中COD、色度、恶臭、TOC、TN等均具有良好的处理效果.通过对吸附性能的影响因素研究发现,活性焦种类、投加量、p H和吸附时间均会影响吸附效果,最佳活性焦投加量为20 g·L~(-1),酸性条件更有利于吸附,渗滤液中COD的去除主要发生在吸附过程的前1 h.活性焦吸附可提高垃圾渗滤液的可生化性,主要吸附垃圾渗滤液中难降解芳香族大分子有机物,其中,对溶解性有机物中疏水性有机酸组分的吸附效果最佳,使其出水适用于生物处理,从而保证污水处理厂COD可以稳定达标排放.
[Abstract]:Biological treatment of landfill leachate with municipal wastewater after pretreatment is an effective method, but there are a large number of refractory organic matter in landfill leachate, which seriously affects the effluent COD of municipal wastewater treatment plant. Therefore, it is necessary to strengthen the pretreatment process of landfill leachate and make it suitable for biological treatment. In this study, activated coke was used to adsorb landfill leachate from a power plant. It was found that activated coke had a good treatment effect on COD, chroma and TOC TN in landfill leachate. Through the study of the factors affecting the adsorption performance, it is found that the kinds of active coke, the dosage of p H and the adsorption time will all affect the adsorption effect. The optimum dosage of active coke is 20 g / L ~ (-1) L ~ (-1), and the acid condition is more favorable to the adsorption. The removal of COD in leachate mainly occurred in the first hour of adsorption process. The biodegradability of landfill leachate can be improved by activated coke adsorption, which mainly adsorbs aromatic macromolecular organic compounds in landfill leachate, among which the adsorption effect of hydrophobic organic acids in soluble organic compounds is the best. The effluent is suitable for biological treatment so as to ensure that COD can be discharged stably.
【作者单位】：江南大学环境与土木工程学院;无锡市环境监测中心站;江苏省厌氧生物技术重点实验室;江苏高校水处理技术与材料协同创新中心;
【基金】：国家水体污染控制与治理科技重大专项(No.2015ZX07306-001) 江苏省重点研发计划(社会发展)科技示范工程项目(No.BE2015622)~~
【分类号】：X703

【相似文献】