沼渣和沼液是沼气利用过程中的副产品,许多农户认识不到这些副产品的利用价值,在对沼气池进行换料时,把抽吸出的大量沼渣和沼液全部废弃了。其实,它们的利用价值很高,当中含有氨基酸、粗蛋白、粗脂肪等营养物质及其衍生物,还含有氮磷钾和铁、 Biogas residue and biogas slurry are by-products of biogas utilization. Many farmers do not realize the value of these by-products. When the biogas digester is refilled, a large amount of biogas residue and biogas slurry are discarded. In fact, their high value, which contains amino acids, crude protein, crude fat and other nutrients and their derivatives, but also contains nitrogen, phosphorus and potassium and iron,