State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
State Key Laboratory of Urban Water Resources and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China.
Sci Total Environ. 2018 Sep 1;635:699-704. doi: 10.1016/j.scitotenv.2018.04.174. Epub 2018 Apr 24.
Sludge disintegration by ultrasound is a promising sludge treatment method. In order to enhance the efficiency of the sludge reduction and hydrolysis, potassium ferrate (KFeO) (PF) was used. A novel method was developed to improve the sludge disintegration-sludge pretreatment by using PF in combination with an ultrasonic treatment (PF + ULT). After a short-term PF + ULT treatment, 17.23% of the volatile suspended solids (VSS) were reduced after a 900-min reaction time, which is 61.3% higher than the VSS reduction for the raw sludge. The supernatant soluble chemical oxygen demand (SCOD), total nitrogen (TN), volatile fatty acids (VFAs), soluble protein and polysaccharides increased by 522.5%, 1029.4%, 878.4%, 2996.6% and 801.9%, respectively. The constituent parts of the dissolved organic matter of the sludge products were released efficiently, which demonstrated the positive effect caused by the PF + ULT. The enhanced sludge disintegration process further alleviates environmental risk and offers a more efficient and convenient method for utilizing sludge.
超声破解污泥是一种很有前途的污泥处理方法。为了提高污泥减量化和水解的效率，使用高铁酸钾（KFeO）（PF）。开发了一种新方法，通过将 PF 与超声处理（PF+ULT）结合来改善污泥破解-污泥预处理。经过短期的 PF+ULT 处理，在 900 分钟的反应时间后，挥发性悬浮固体（VSS）减少了 17.23%，比原始污泥的 VSS 减少了 61.3%。上清液可溶解性化学需氧量（SCOD）、总氮（TN）、挥发性脂肪酸（VFAs）、可溶性蛋白质和多糖分别增加了 522.5%、1029.4%、878.4%、2996.6%和 801.9%。污泥产物中溶解有机物质的组成部分被有效地释放出来，这证明了 PF+ULT 的积极作用。增强的污泥破解过程进一步减轻了环境风险，并为利用污泥提供了更有效和方便的方法。
