摘要
采用静态强制通风好氧堆肥的方法,以木屑作为对比,考察了利用污泥熟肥作为调理剂对污泥堆肥过程的影响。结果表明,与以木屑作为调理剂的污泥堆体(对照组)相比,以污泥熟肥作为调理剂的污泥堆体(实验组)升温快,高温阶段(>50℃)持续时间长达10 d,满足粪便无害化卫生标准的要求,而对照组仅持续了2 d;实验组腐熟的堆肥含水率从60%降到39%,下降了21%,pH维持在7.5～8.5范围内,微生物活性较强,而对照组含水率仅下降15%,pH始终低于7.5;实验组种子发芽指数(GI)在第14天就回升到80%以上,基本上去除了植物毒性,而对照组GI在第22天才回升到50%。总体而言,污泥熟肥能显著改善堆肥中微生物的微环境,促进有机物的降解,缩短堆肥腐熟时间,是一种优质的调理剂。
Abstract The effect of sludge matured compost on studied. It showed that, compared with sawdust （matched sewage sludge static forced-aeration composting was group） , the compost mixed with matured sludge com- post （experimental group） warmed faster. And the high-temperature stage （ 〉 50℃ ） continued for 10 days, which achieved the sanitary standard for the non-hazardous treatment of night soil, while the high-temperature stage of matched group lasted for only two days. The water content of experimental group decreased from 60% to 39%, decreased by 21%, and the pH value were between 7.5 and 8.5, which promoted the activity of mi- crobe. But the water content of matched group decreased only by 15%, and the pH value was always lower than 7.5. The germination index （GI） of experimental group increased to 80% on the 14th day, which suggested that the biological toxicity of compost was almost removed. GI of matched group was lower than 50% until the 22th day. All in all, matured sludge compost conditioner the degradation of the organic matter, and accelerate riot composting conditioner. can improve the microenvironment of composting, promote the composting process. Matured sludge compost is a supe-
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第6期2349-2355,共7页
Chinese Journal of Environmental Engineering
基金
广州市水务局科技计划项目资助
关键词
污泥熟肥
调理剂
污泥堆肥
matured sludge compost
conditioner
sludge composting
