不同基质组合渗滤系统去除污水中总磷和氨氮研究

发布时间：2019-02-14 20:13

【摘要】：试验选取活性炭、沸石、无烟煤、陶粒和草炭五种基质作为土壤渗滤系统填料基质,进行静态吸附吸附试验,并对其去除总磷和氨氮效果进行对比研究。将静态吸附试验中筛选的基质与土壤进行不同比例混合,作为玻璃柱装置的填充基质进行模拟土柱试验,从而选择去除总磷和氨氮的最优基质配比。结果表明,在基质筛选的静态吸附试验中,5种基质对总磷的吸附去除率由大到小依次为：无烟煤活性炭沸石草炭陶粒；对氨氮的吸附去除率由大到小依次为：草炭沸石活性炭粉煤灰陶粒。通过室内土柱试验模拟土壤渗滤系统,考察了土壤(TR)、无烟煤(WY)、活性炭(HX)、土壤+无烟煤(TR+WY)、土壤+活性炭(TR+HX)、土壤+无烟煤+活性炭(TR+WY+HX)6种基质组合对污水中总磷的去除效果以及对pH的影响。也考查了土壤(TR)、沸石(FS)、草炭(CT)、沸石+土壤(FS+TR)、草炭+土壤(CT+TR)、沸石+草炭+土壤(FS+CT+TR)6种基质组合对污水中氨氮的去除效果以及对pH的影响。结果表明,在水力负荷0.08 m3m-2d-1条件下,6种不同填充基质对污水中总磷的去除效果由大到小分别为：WYTR+WYTR+WY+HXHXTR+HXTR。其中经WY、TR+WY以及TR+WY+HX处理后的污水,出水中总磷的平均质量浓度达到了《城镇污水处理厂污染物排放标准》中的一级A标准；除处理WY、TR+HX外,经其他基质组合去除后的污水pH值与进水pH值均无显著差异。在模拟土柱实验中,当水力负荷为0.08 m3m-2d-1,进水氨氮平均浓度为65.58 mg/L时,6种装置中不同基质组合对污水中氨氮的去除效果由大到小依次为FS+TRTRCT+TRFS+CT+TRCTFS装置。经FS+TR和TR去除的污水,出水氨氮的平均浓度达到了《城镇污水处理厂污染物排放标准》中的一级A标准。除处理CT出水的pH值偏低外,其他基质组合出水的平均pH值均在国家排放污水标准的pH值之内。可知一些填料基质能够全部或部分替代纯土壤,且其中某些处理优于原有土壤处理,对污水中总磷和氨氮的去除率均有显著提高。
[Abstract]:Activated carbon, zeolite, anthracite, ceramsite and peat were selected as the fillers of soil leachate system. The static adsorption experiments were carried out, and the results of removal of total phosphorus and ammonia nitrogen were compared. The matrix selected in the static adsorption test was mixed with soil in different proportion, and the soil column was simulated as the filled matrix of glass column device, and the optimal ratio of matrix to remove total phosphorus and ammonia nitrogen was selected. The results showed that in the static adsorption test, the removal rates of total phosphorus from five substrates were as follows: anthracite activated carbon zeolite peat ceramsite; The removal rate of ammonia nitrogen from large to small is peat zeolite activated carbon fly ash ceramsite. The soil (TR), anthracite (WY), activated carbon (WY),) activated carbon (HX),) soil anthracite (TR WY),) activated carbon (TR HX),) was investigated by simulating soil leachate system with soil column test in laboratory. The removal efficiency of total phosphorus and the effect on pH of soil anthracite activated carbon (TR WY HX) combined with six substrates. Soil (TR), zeolites, (FS), peat, (CT), zeolites, (FS TR), peat soils, (CT TR), were also investigated. The removal efficiency of ammonia nitrogen and the effect of pH on the removal of ammonia nitrogen from waste water by six matrix combinations of (FS CT TR) in zeolite peat soil. The results showed that under the hydraulic loading of 0.08 m3m-2d-1, the removal efficiency of total phosphorus from six different filling substrates was: WYTR WY HXHXTR HXTR. from large to small. After treatment with WY,TR WY and TR WY HX, the average mass concentration of total phosphorus in the effluent reaches the first class A standard of the pollutant discharge standard of the municipal wastewater treatment plant. Except for the treatment of WY,TR HX, there was no significant difference between the pH value of sewage treated by other matrix combination and the pH value of influent. In the simulated soil column experiment, when the hydraulic load is 0.08 m ~ (-3) m ~ (-2) d ~ (-1) and the average concentration of influent ammonia nitrogen is 65.58 mg/L, The removal efficiency of ammonia nitrogen from sewage by different matrix combinations in 6 kinds of plants is FS TRTRCT TRFS CT TRCTFS unit in order from large to small. After FS TR and TR removal, the average concentration of ammonia nitrogen in the effluent reached the first class A standard of the pollutant discharge standard of the municipal wastewater treatment plant. Except for the low pH value of CT effluent, the average pH value of other matrix combinations was within the pH value of the national wastewater discharge standard. It can be seen that some filler substrates can completely or partially replace the pure soil, and some of them are better than the original soil treatment, and the removal efficiency of total phosphorus and ammonia nitrogen in sewage is improved significantly.
【学位授予单位】：北京林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X703

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