标题：Preparation and properties of sewage sludge ceramic pellets
作者：Yue Min; Yue Qinyan; Qi Yuanfeng; Han Shuxin; Zhao Yaqin; Gao Baoyu
作者机构：[Yue Min; Yue Qinyan; Qi Yuanfeng; Han Shuxin; Zhao Yaqin; Gao Baoyu] Shandong Univ, Shandong Key Lab Water Pollut Control & Resource, Sch Environm Sc 更多
会议名称：4th International Conference on Bioinformatics and Biomedical Engineering (iCBBE)
会议日期：JUN 18-20, 2010
来源：2010 4TH INTERNATIONAL CONFERENCE ON BIOINFORMATICS AND BIOMEDICAL ENGINEERING (ICBBE 2010)
关键词：Sewage sludge; Ceramic pellet; Filter material; Sintering techniques;; Properties
摘要：The object of this study is to investigate the sintering processes of sewage sludge ceramic pellets (SSCP) as filter media. The effects of adding coal fly ash and farmland clay were tested, and the feasibility of using SSCPs in a biological aerated filter (BAF) was determined by comparing their performance with that of commercial ceramic pellets (CCP). Unlike the procedure to make lightweight sewage sludge aggregates as construction material, the sintering techniques for formation of the SSCP filter material were as follows: a maximum mass ratio of 35% dried sewage sludge mixed with clay and fly ash was preheated at 400 degrees C. for 20 min, then sintered at 1000 degrees C. to 1050 degrees C. for 5-10 min. The main chemical composition of SSCP and CCP was similar, and the environmental suitability of SSCP is satisfactory. Scanning electron microscopy images showed that the dimensions of the pores on the surface and interior of SSCP were much larger than those of CCP. Removal of NH3-N in BAFs filled with SSCP as carrier was higher about 10% than with CCP, which indicated that SSCP supplied a much better environment for the nitrifying and denitrifying bacteria.