摘要
选用锯末作为污泥调理剂,研究了不同配比的锯末对污泥堆肥过程中理化参数变化的影响。结果表明,污泥和锯末采用3.5∶1.0(m∶m,下同)和4.0∶1.0的比例达到的最高温度、高温持续时间以及降解挥发性固体含量(VS)要优于采用3.0∶1.0和5.0∶1.0的比例,而氮损失较为严重,分别达到了63.25%和53.05%。硝态氮含量均呈现先下降后逐渐上升的趋势,与铵态氮的含量变化相反;堆肥结束时各处理p H、EC和GI均符合无害化要求。考虑到辅料成本和氮损失两方面的因素,污泥和锯末堆肥过程中推荐采用4.0∶1.0的比例。
The sawdust was selected as the compost conditioner and the different sawdust content on physicochemical parameters of sewage sludge composting was studied.The results indicated that the proportion of 3.5：1.0（m：m） and 4.0：1.0 （m： m） between sludge and sawdust during composting can achieve the highest temperature and the duration of high temperature and treatment the VS content compared to 3.0：1.0 and 5.0：l.0;where the proportion of 3.5：1.0 （m：m） and 4.0：1.0 （m：m） were serious,with the decline of 63.25% and 53.05% respectively. The nitrate nitrogen content performed to decline firstly and then increase. However ammonium nitrogen content changes just on the opposite trend. The pH,EC and GI during composting all met the requirements of harmless at the end of composting. Taking material cost and the nitrogen loss into account,it is recommended that 4.0：1.0 （m：m） was the optimized ratio in the process of sludge and sawdust compost.
出处
《湖北农业科学》
2015年第10期2339-2343,共5页
Hubei Agricultural Sciences
基金
国家水体污染控制与治理科技重大专项(2012ZX07204-001)
河南省重大公益招标项目(101100910300)
河南省科技攻关项目(142102310063)
河南省教育厅科学技术研究重点项目(14A610009)
郑州轻工业学院博士科研基金资助项目(2013BSJJ022)
关键词
污泥
堆肥
调理剂配比
理化参数
sewage sludge
composting
bulking agent ratio
physicochemical parameters
