SLUDGE BIO-DRYING PROCESS AT LOW AMBIENT TEMPERATURE: EFFECT OF BULKING AGENT PARTICLE SIZE AND SET TEMPERATURE

摘要：

Sludge bio-drying is an aeration bioprocess aiming at water removal.The mechanism is that sludge is dried by bio-heat generated from aerobic decomposition of organics.From this study, the process could start up in winter (3–9℃) with a 2–3 days lag, while the duration time of it was short as only 7 days.The most effective water removal rate of 31.0％ was obtained.As a common bulking agent, straw of mixed particle sizes gave a better run than small (2–5 mm) and large (20–30 mm) one alone.Lower set matrix temperature (43℃) was more effective than higher one (53℃).Small particle size was beneficial to organics degradation, while it was disadvantageous for water loss (28.4％).It was on the contrary for larger straw (25.9％).Higher set temperature can enhance biodegradation remarkably, while it resulted to less aeration accounting for less water removal (29.2％).

关键词： sludge bio-drying bulking agent particle size set temperature water removal

作者: ZHAO Ling GU Weimei SHAO Liming HE Pinjing

作者单位: Institute of Waste Treatment & Reclamation,College of Environmental Science and Engineering,TongjiUn Institute of Waste Treatment & Reclamation,College of Environmental Science and Engineering,Tongji U

会议类型: 国际会议

会议名称: The 7th Asia-Pacific Drying Conference(第七届亚太地区干燥会议 ADC2011)

会议地点: 天津

会议语种:英文

页码: 1-7

在线出版日期: 2011-09-18（万方平台首次上网日期，不代表论文的发表时间）