摘要
采用堆肥发酵仓法在冬季和夏季进行了秸秆堆肥过程处理猪场废水的影响因素研究。结果表明,夏季总的吸水率(1∶9.43)比冬季(1∶6.65)高41.8%;夏季堆体温度50℃、55℃以上持续时间分别比冬季长14d和18d。加猪粪水处理、含麦秆少的处理、鼓风处理的吸水率分别高于加厌氧消化液处理、含麦秆多的处理、翻堆或翻堆+鼓风的处理;堆体温度50℃、55℃以上的持续时间也表现出与吸水率同样的趋势。在堆肥过程中,氮、磷、钾是一个不断累加和浓缩的过程。堆肥过程结束时,全氮含量达到3%左右,全磷达0.7%￣1.75%,全钾达1.8%￣3%,氮、磷、钾总养分含量在5.5%￣7.5%之间。堆肥过程对蛔虫卵100%杀灭,除加猪粪水厌氧消化液的处理、以单纯麦秆为载体的处理外,其他处理的卫生指标均达到了《粪便无害化卫生标准》(GB7959)的要求。载体吸水率、高温持续时间、堆肥养分含量以及卫生指标说明稻秆最适合作为载体处理利用猪场废水。
Influencing factors of composting with straws as carrier for treating piggery wastewater were investigated in summer and winter, respectively. The ratio of straw absorbing wastewater (1:9.43) in summer was 41.8% higher than that (1:6.65) in winter. The duration of high temperature with 50°C and 55°C was 14 d and 18 d, respectively, longer in summer than those in winter. The treatments with adding piggery wastewater, with less wheat straw and with aeration using air blowing had higher ratio of straw absorbing wastewater than those of treatments with adding anaerobic effluent, having more wheat straw and with aeration using turnover or using air blowing + turnover, respectively. The duration of high temperature with over 50 ℃ and 55 ℃ also revealed the same trend as the ratio of straw absorbing wastewater. In the process of composting, the nitrogen, phosphorus and kalium of composting fertilizer cumulated continuously and condensed. At the end of composting, the content of total N, P and K reached about 3%, 0.7%~1.75%, and 1.8%~3%, respectively, and the total contents of nitrogen, phosphorus and kalium ranged from 5.5% to 7.5%, higher than that of original composting mixture. In the composting process, 100% parasite eggs were killed. Except for ecological index of composts, only those with wheat-straw as carrier and compost adding anaerobic effluent, other indexes were in line with the official Sanitation Standard for Non-hazardous Treatment of Night Soil, (GB7959-87). The ratio of straw absorbing wastewater,duration of high temperature,nutrient contents and sanitation indexes showed that rice straw was the most suitable in three straws to use as carrier in treating and reusing piggery wastewater.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2005年第3期506-511,共6页
Journal of Agro-Environment Science
基金
农业部科教司农村能源泉专项资金
国家"十五"科技攻关资助(2002BA514A-1-2-4)
关键词
秸秆
猪场废水
堆肥
吸水率
影响因子
straw
piggery wastewater
composting
ratio of straw absorbing wastewater
influencing factors
