Sun Dedong, Guo Sixiao, Ma Nina, Wang Guowen, Ma Chun, Hao Jun, Xue Mang, Zhang Xinxin
School of Light Industry and Chemistry Engineering, Dalian Polytechnic University, Dalian 116034, China E-mail:
Water Sci Technol. 2016;73(12):2882-7. doi: 10.2166/wst.2016.149.
This research focuses on the effects of microwave-assisted activated carbon fibre (ACF) (MW-ACF) treatment on sewage sludge at alkaline pH. The disintegration and biodegradability of sewage sludge were studied. It was found that the MW-ACF process at alkaline pH provided a rapid and efficient process to disrupt the microbial cells in the sludge. The results suggested that when irradiated at 800 W MW for 110 s with a dose of 1.0 g ACF/g solid concentration (SS) at pH 10.5, the MW-ACF pretreatment achieved 55% SS disintegration, 23% greater than the value of MW alone (32%). The concentration of total nitrogen, total phosphorus, supernatant soluble chemical oxygen demand, protein, and polysaccharide increased by 60%, 144%, 145%, 74%, and 77%, respectively. An increase in biogas production by 63.7% was achieved after 20 days of anaerobic digestion (AD), compared to the control. The results indicated that the MW-ACF pretreatment process at alkaline pH provides novel sludge management options in disintegration of sewage sludge for further AD.
本研究聚焦于微波辅助活性炭纤维（MW - ACF）处理在碱性pH条件下对污水污泥的影响。研究了污水污泥的解体及生物降解性。结果发现，碱性pH条件下的MW - ACF工艺能快速有效地破坏污泥中的微生物细胞。结果表明，在pH值为10.5时，以800W微波辐照110s，ACF投加量为1.0g ACF/g固体浓度（SS），MW - ACF预处理实现了55%的SS解体率，比单独微波处理的值（32%）高23%。总氮、总磷、上清液可溶性化学需氧量、蛋白质和多糖的浓度分别增加了60%、144%、145%、74%和77%。与对照相比，厌氧消化（AD）20天后沼气产量增加了63.7%。结果表明，碱性pH条件下的MW - ACF预处理工艺为污水污泥解体以进行进一步AD提供了新的污泥管理选择。
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