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对采集白银市靖远县正常产气的1 a沼气池沼液和3 a沼气池沼液的养分含量、微量元素含量、重金属含量、其它物质含量及p H进行了测定。结果表明,1 a沼气池沼液和3 a沼气池沼液的养分含量都很丰富,但随着年限的增加,沼液中的养分含量、微量元素含量、重金属含量、其它物质含量及p H也明显增加。同时由于沼液中的重金属含量及有害离子的增多,存在食品安全隐患。
The nutrient contents, trace element contents, heavy metal contents, other material contents and p H of biogas digesters in 1 a biogas digester and 3 a biogas digesters for the normal gas production in Jingyuan County, Baiyin City were measured. The results showed that the biogas slurry in biogas digesters and biogas digesters in 3 a biogas digesters were rich in nutrients, but the nutrient contents, trace elements, heavy metals, other substances and p H in the biogas slurry were also significantly increased with the increase of years increase. At the same time as the heavy metal content in biogas slurry and the increase of harmful ions, there are food safety hazards.