沼渣、沼液的养分含量及安全性研究

目的]研究供试沼渣、沼液的养分含量及安全性。方法]通过检测正常使用中的大型沼气工程产生的沼渣、沼液,根据相关国家标准进行对比分析,进而得出沼渣、沼液的养分情况和安全情况。结果]沼渣的有机质含量超过国家有机肥标准,总养分基本达到国家制定的指标,沼液有机质含量和总养分低于国家有机肥标准,沼液、沼渣适宜与其他营养元素混合施用。供试沼渣和沼液中重金属含量低于国家复合肥标准,是可以用于农事生产的安全养分供应来源。供试沼渣和沼液中血吸虫、钩虫卵和寄生虫卵为零,表明沼气工程发酵过程能够杀灭有害虫卵。结论]该研究可为沼渣、沼液应用于农业生产提供理论基础。

Study on Nutrient Contents and Security of Biogas Residue and Fluid

Objective] The research aimed to study nutrient contents and security of the tested biogas residue and fluid. Method] By testing the biogas residue and fluid generated by barge biogas project normally running, and contrasting with the relevant national standards, nutrient con- tents and security of biogas residue and fluid were obtained. Result ] Organic matter content of the biogas residue surpassed national organic fer- tilizer standards, and total nutrient basically reached national indicators. Organic matter content and total nutrient of the biogas fluid were lower than national organic fertilizer standards. Biogas residue and fluid were suitable to mix with other nutrients. Heavy metal contents of the tested biogas residue and fluid were lower than national compound fertilizer standards, which could be as supply source of safe nutrient for agricultural production. Schistosome, hookworm and parasite eggs in the tested biogas residue and fluid were zero, showing fermentation process of biogas project could kill harmful eggs. Conclusion] The research could provide theoretical basis for biogas residue and fluid applying in agricultural production.