摘要
采用了自主设计的污泥生物干化实验室模拟系统,研究了调理剂、物料配比和通风方式等实验条件对脱水污泥生物干化的影响效果。研究结果表明,与锯末相比,秸秆有利于反应物料温度的上升,含水率下降程度更大;利用秸秆调节污泥初始含水率在60%和65%的实验条件下时,物料的平均含水率分别下降了7%和6%,当初始含水率>65%时,生物堆体的温度和含水率没有明显的变化;与连续通风相比较,间歇通风的实验条件有利于生物堆体的温度的升高和干化效果;在该实验中,最佳的生物干化条件是以秸秆为调理剂,初始含水率调至65%以下,以间歇方式进行通风。
Influences of amendments and air-flow on biodrying of dehydrated sewage sludge were studied using a self-designed experimental equipment.The results showed that the temperature of material was rapidly increased and water was easily removed,when straw was used as bulking agent.As initial water content were 60% and 65%,the final water content decreased by 7% and 6%,respectively.Whereas initial water content was higher than 65%,the temperature and water content of material kept consistent.Compared with continuous air-flow,interval air-flow better facilitated the increase of temperature and removal of water of material.The present results proved that optimal condition of biodrying of dehydrated sewage sludge were straw as bulking agent,below 65% of initial water content and interval air-flow.
出处
《环境工程学报》
CAS
CSCD
北大核心
2010年第5期1167-1170,共4页
Chinese Journal of Environmental Engineering
基金
国家水体污染控制与治理科技重大专项课题(2008ZX07313-001)
关键词
脱水污泥
生物干化
调理剂
通风
dehydrated sewage sludge
biodrying
amendments
air-flow
