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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.
Landfill leachate pretreated with municipal wastewater mixed for biological treatment is a more effective method, but the landfill leachate contains a large number of refractory organic matter, seriously affecting the town sewage treatment plant effluent COD. Therefore, the need to strengthen landfill leachate pretreatment Process to make it suitable for biological treatment.In this study, activated coke was used to adsorb landfill leachate from a waste incineration power plant, and found that activated coke had good treatment effects on COD, color, malodour, TOC and TN in landfill leachate. Through the study on the influencing factors of adsorption performance, it was found that the types of active coke, dosage, p H and adsorption time all affect the adsorption effect, the best active coke dosage is 20 g · L -1, and the acidic conditions are more Is conducive to adsorption, removal of COD in leachate mainly occurred in the first 1 h of the adsorption process.Active coke adsorption can improve the biodegradability of landfill leachate, which mainly adsorbs refractory aromatic macromolecules in landfill leachate, The hydrophobic organic acid component of the dissolved organic matter has the best adsorption effect, making the effluent suitable for biological treatment, so as to ensure that the COD of the sewage treatment plant can be discharged steadily.