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	A grit separation module for inorganic matter removal from activated sludge: investigation on characteristics of split sludge from the module
	Chen, You-Peng1,2; Guo, Jin-Song1,2; Wang, Jing3; Yan, Peng1,2; Ji, Fang-Ying4; Fang, Fang4; Dong, Yang1,2
	2016-12-01
摘要	A grit separation module was developed to prevent the accumulation of inorganic solids in activated sludge systems, and it achieved effective separation of organic matter and inorganic solids. To provide technical and theoretical support for further comprehensive utilization of split sludge (underflow and overflow sludge from the separation module), the characteristics of split sludge were investigated. The settling and dewatering properties of the underflow sludge were excellent, and it had high inorganic matter content, whereas the overflow sludge had higher organic matter content. The most abundant inorganic constituent was SiO2 (59.34%), and SiO2, Al2O3, and Fe2O3 together accounted for 79.53% of the inorganic matter in the underflow sludge. The mass ratio of Fe2O3, CaO, and MgO to SiO2 and Al2O3 was 0.245 in the inorganic component of the underflow sludge. The underflow sludge had the beneficial characteristics of simple treatment and disposal, and it was suitable for use as a base raw material for ceramsite production. The overflow sludge with higher organic matter content was constantly returned from the separation module to the wastewater treatment system, gradually improving the volatile suspended solid/total suspended solid ratio of the activated sludge in the wastewater treatment system.
关键词	Activated sludge grit accumulation grit separation module hydrocyclone separation comprehensive utilization
DOI	10.1080/09593330.2016.1181108
发表期刊	ENVIRONMENTAL TECHNOLOGY
ISSN	0959-3330
卷号	37期号:24页码:3168-3176
通讯作者	Yan, P (reprint author), Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing, Peoples R China. ; Yan, P (reprint author), Chinese Acad Sci, Key Lab Reservoir Aquat Environm, Chongqing, Peoples R China.
收录类别	SCI
WOS记录号	WOS:000385531000009
语种	英语