摘要
以兰州市城市生活鲜污泥和40%干污泥为原料,以玉米秸秆为辅料,添加金宝贝生物发酵剂和阿姆斯生物发酵剂进行堆肥,研究微生物菌剂对堆肥过程中温度、含水率、NH4+-N、NO3--N和全N的影响。结果表明,除鲜污泥(D-1,CK)处理外,其他各处理堆体温度保持在50℃以上均超过7d,达到堆肥卫生标准,加入微生物菌剂使堆体提前5d达到50℃;其他各处理经过20d堆置含水率降至45%以下,达到园林绿化使用标准;加入微生物菌剂使堆体全N损失增加0.56%～4.47%,并促进NH4+-N的生成和NO3--N的积累。
In order to explore the influence of the microbial preparation on temperature,moisture content,NH4＋-N,NO3——N and total nitrogen in the composting process,the study took the sewage sludge（SS） of Lanzhou as the material,adding the corn stalk（C） and microbial preparation（A and K） on sludge compost.The results showed that,except for the treatment of no addition microbial agents（SS）,the temperatures of SS＋40%DS＋5%C,SS＋40%DS＋5%C＋K,SS＋40%DS＋5%C＋A,SS＋40%DS＋5%C＋2A kept above 50 ℃ for 7 days above.After 20 days composting,when the moisture content of compost decreased to below 45%,the compost could meet the needs of garden.At the end of composting process,the loss rate of total nitrogen is 19.01%,18.46%,13.99%,and 8.54% lower than SS.Thus,the microbial preparation had great influence on temperature,it could promote heating rate while increase the loss of nitrogen.So controlling composting time had a very important significance for shortening production time to avoid the loss of nitrogen.In conclusion,the composting of sewage sludge can be successfully carried out when the temperature and moisture contents are appropriate,and the composting cycle is 20 days.
出处
《西北农业学报》
CAS
CSCD
北大核心
2012年第12期168-172,共5页
Acta Agriculturae Boreali-occidentalis Sinica
基金
兰州市科技计划项目(2011-1-23)
关键词
城市生活污泥
堆肥
微生物菌剂
氮素
Municipal sludge
Composting
Microbial agents
Nitrogen
