Department of Environmental Biotechnology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 45G Słoneczna St, 10-907 Olsztyn, Poland.
Department of Environmental Biotechnology, Faculty of Geoengineering, University of Warmia and Mazury in Olsztyn, 45G Słoneczna St, 10-907 Olsztyn, Poland.
Waste Manag. 2020 Aug 1;114:174-182. doi: 10.1016/j.wasman.2020.07.011. Epub 2020 Jul 14.
The aim of this study was to investigate the efficiency of removal of difficult-to-biodegrade organic compounds from real stabilized landfill leachate with a membrane process alone and in combination with powdered-activated-carbon (PAC) adsorption. For filtration, ceramic membranes were used. The characteristics of the raw leachate were 788 mg COD/L and color of 0.4458 cm. With all combinations of PAC-adsorption and a membrane process (MF, UF, fine-UF) and with fine-UF alone, leachate treatment was highly efficient. For each membrane, treatment was more efficient when the membrane process was combined with PAC addition. This means that adsorption (PAC dose 3 g/L, adsorption time 30 min) made the largest contribution to leachate treatment (COD and color removal efficiency of 73.1% and 94.4%, respectively). In all cases, organic particles bigger than 100 kDa were removed most efficiently, whereas particles smaller than 3 kDa were removed least efficiently. The efficiency of leachate treatment with PAC + MF, PAC + UF and PAC + fine-UF did not differ significantly (>87% COD and > 97% color). With regard to membrane flux, however, these combinations can be ranked in the following order: PAC + MF > PAC + UF > PAC + fine-UF. Therefore, PAC + MF (0.3 MPa) was selected as the most effective solution (COD and color removal efficiencies of 87.8% and 97.2%, respectively; permeate flux of 167.6 L/(m∙h)), as it combined efficient pollutant removal with low membrane pressure.
本研究旨在考察单独采用膜过程以及与粉末活性炭（PAC）吸附联合应用于从实际稳定化垃圾渗滤液中去除难生物降解有机化合物的效率。过滤采用陶瓷膜。原渗滤液的特征为 COD 为 788mg/L，色度为 0.4458cm。对于所有 PAC 吸附与膜过程（微滤、超滤、精细超滤）的组合，以及单独采用精细超滤，渗滤液处理的效率均很高。对于每种膜，当膜过程与 PAC 加入联合应用时，处理更为有效。这意味着吸附（PAC 投加量 3g/L，吸附时间 30min）对渗滤液处理的贡献最大（COD 和色度的去除效率分别为 73.1%和 94.4%）。在所有情况下，去除大于 100kDa 的有机颗粒的效率最高，而去除小于 3kDa 的颗粒的效率最低。PAC+MF、PAC+UF 和 PAC+精细超滤处理渗滤液的效率无显著差异（COD 去除率>87%，色度去除率>97%）。然而，就膜通量而言，这些组合可按以下顺序进行排序：PAC+MF>PAC+UF>PAC+精细超滤。因此，选择 PAC+MF（0.3MPa）作为最有效的解决方案（COD 和色度的去除率分别为 87.8%和 97.2%，渗透通量为 167.6L/（m·h）），因为它结合了高效的污染物去除和低膜压力。
