非膜技术处理生物稳定渗滤液的效果及成本

以经厌氧-好氧处理的生物稳定渗滤液为研究对象,分别比较了其经活性炭吸附、混凝、芬顿和电解处理后的溶解性有机碳(DOC)、COD、溶解性氮(DN)和比紫外吸光度(SUV254)的变化,及去除单位COD的成本变化.研究发现,活性炭吸附、芬顿和混凝对生物稳定渗滤液的COD、DOC和DN的去除效率均随药剂投加量的增加而提高;包...

Cost-benefit analysis of different non-membrane based technologies for the treatment of bio-stabilized leachate

In this paper, four non-membrane based techniques, including activated carbon adsorption, coagulation, Fenton and electrolysis, were applied to treat the anaerobic-aerobic stabilized leachate. The respective water quality parameters, such as dissolved organic carbon (DOC), chemical oxygen demand (COD), dissolved nitrogen (DN) and specific ultraviolet absorbance at 254nm (SUV₂₅₄), were determined for comparison. Cost change curve of removing unit COD was also depicted. When activated carbon adsorption, Fenton and coagulation were employed, the removal efficiencies of COD, DOC and DN increased with enhancing the dosages of agents. Fenton and electrolysis as chemical oxidation techniques shows superior performance on the removal of aromatized organics, resulting in 60%~70% reduction of SUV₂₅₄. In addition, the removal efficiency linearly increased with the current density. For every unit of COD removal, the cost for applying activated carbon adsorption is highest among all the tested techniques while the expense of Fenton will be minimal. To make these techniques economical, it is recommended that 5g/L of activated carbon, 0.605g/L of Fenton reagent and 4.92mmol/L Fe of coagulant were used for each process. When applied in practical application, it is worth noting that the actual dosage need be optimized on basis of the properties of on-site leachate and the local discharge standards.