【摘要】 为指导沼液的高效合理施用,对4种不同发酵原料的沼液养分及重金属含量作了分析。结果发现:牛粪(n=7)和混合原料(n=4)厌氧发酵产生的沼液有机质含量比猪粪(n=6)和鸡粪(n=3)原料偏高,不同原料沼液的全氮、全磷、全钾养分含量差异不大,沼液过0.5 mm筛后,沼液有机质、全氮、全磷、全钾含量均有所降低。沼液样品中可以检出重金属铬、汞,镉等,但未超过有机肥料中对重金属含量的限量标准。更多还原

【Abstract】 The total nitrogen(TN),total phosphorus(TP),total potassium(TK),organic matter and heavy metals of 20 biogas slurry samples were analyzed.The results showed that the organic matter contents in the biogas slurry from cow dung digesters(n = 7) and mixed raw material digesters(n = 4) were higher comparing with that from pig manure digesters(n = 6) and chicken manure digesters(n = 3).There were no significant differences in TN,TP and TK contents in biogas slurry from different raw materials.The contents of organic matter,TN,TP and TK in the biogas slurry decreased after the slurry passing through the 0.5mm sieve.Heavy metals such as chromium,mercury,cadmium were found in biogas slurry,however,it did not exceed the limited heavy metals standard for organic fertilizer.更多还原