摘要
为实现沼液农田安全应用,研究了规模化养猪场沼液在不同贮存时间条件下,有机物和重金属变化规律,用单因子指数法和综合因子指数法对各指标进行分析。结果表明:沼液中污染物总量随贮存时间增加而下降,主要致污因子为3种有机污染物,5种重金属均无超标,沼液贮存时间大于9天时,综合污染评价为安全级,且农田应用需兑水稀释。评价结果可以为沼气工程的工艺改进提供参考。
In order to achieve a safe application of biogas slurry to farmland, the change rules of organic matter and heavy metal were studied under different storage time in large-scale pig farm, the indexes were analyzedby the method of single-factor pollution index and comprehensive-factor pollution index. The results showedthat total pollutants decreased with the increase of storage time, the main pollution factors included 3 kinds oforganic pollutants, 5 kinds of heavy metals did not exceed the standard. When the storage time was over 9days, the biogas slurry could reach the safety level in comprehensive-factor pollution index evaluation, andwater dilution was required in the application of biogas slurry. The evaluation results could provide reference for improving the process of biogas engineering.
出处
《中国农学通报》
2016年第13期125-128,共4页
Chinese Agricultural Science Bulletin
关键词
贮存
沼液
污染
分析
评估
storage
biogas slurry
pollution
analysis
evaluation
