title: [Influence of accessories mixing ratio on sludge biophysical co-drying].
abstract: Parameters (temperature, water content and so on) in the process of sludge biophysical co-drying were studied in self-made biophysical co-drying reactor. The sludge: tree bark: recycled sludge was set as 7: 3: 0.5, 9: 3: 0.5, 12: 3: 0.5 respectively. The results suggested that sludge temperature first increased then decreased along with drying time, water content decreased in the first 96 h, then had no obvious variability. While sludge: tree bark: recycled sludge was 9: 3: 0.5, the temperature of sludge spiraling, received to max 67 degrees C at 48 h under three different accessories mixture ratio, and was kept for 72 h above 55 degrees C, then spiraling, the final water content of sludge decreased from 74.1% to 61.8%, received the optimal water content removing rate 43.5%. Accessories mixing ratio had important influence on the process of sludge biophysical co-drying, sludge with proper mixing ratio can modify the structure of sludge, improve sludge permeability, arouse and keep microorganic activity, which will enhance sludge temperature and strengthen water content removal rate.
authors.affiliation: School of Environment, Tsinghua University, Beijing 100084, China. yjl08@mails.tsinghua.edu.cn
authors.forename: Jin-Long
authors.initials: JL
authors.lastname: Yang
authors.forename: Qiong
authors.initials: Q
authors.lastname: Du
authors.forename: Dong
authors.initials: D
authors.lastname: Li
authors.forename: Rong
authors.initials: R
authors.lastname: Han
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhao
authors.forename: Hong-Tao
authors.initials: HT
authors.lastname: Wang
mesh_terms: D001419:Bacteria / Q000378:metabolism; D055592:Biophysical Phenomena; D003890:Desiccation / Q000295:instrumentation / Q000379:methods*; D006358:Hot Temperature; D024301:Plant Bark / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D012722:Sewage / Q000737:chemistry* / Q000382:microbiology; D014865:Waste Disposal, Fluid / Q000379:methods
chemical_list: D012722:Sewage