An experiment was performed to study the inactivation effect of aerobic composting on heavy metals in maggot, pig and chicken manures. After composting, Cu mainly occurred in the oxidizable (OXI) fraction with a percentage distribution above 54%. Zn and Cd mainly existed in the bioavailable factor (BF), which has strong activity, with percentage distributions greater than 88.3% and 82.7%, respectively. Cr and Pb mainly existed in the stable residual (RES) fraction with a percentage distribution of approximately 50%. The aerobic composting process had a clear inactivation effect on heavy metals. For maggot manure compost in particular, the inactivation effects of Cu, Cr, Zn, Cd, and Pb were very good throughout the composting process, and the inactivation effect of Pb reached 54.42%. In addition, the process of biotransformation by housefly maggots promoted the conversion of fulvic acid (FA) to humic acid (HA) in pig manure, and the final increase in HA/FA after maggot manure composting was the largest among the different types of manure and beneficial to the inactivation of heavy metals. Compounds containing -CH₃ and -CH₂ groups were reduced, and aromatic structures were enhanced. Moreover, a maggot yield equivalent to 13.2% of the fresh pig manure was achieved during the process of biotransformation. The correlation analysis results showed that moisture content was an important factor affecting the inactivation rates of heavy metals in the three manure composts. Our results highlight that the process of biotransformation by housefly maggots can promote composting maturity and the inactivation of heavy metals, and produce a large amount of insect protein, yielding beneficial ecological and economic benefits.

进行了一项实验研究有氧堆肥对on，猪和鸡粪中重金属的灭活作用。堆肥后，Cu主要存在于可氧化（OXI）馏分中，其百分比分布高于54％。锌和镉主要存在于生物利用因子中，具有很强的活性，其百分比分布分别大于88.3％和82.7％。Cr和Pb主要存在于稳定残留（RES）馏分中，其百分比分布约为50％。好氧堆肥过程对重金属具有明显的灭活作用。特别是对于mag肥堆肥，Cu，Cr，Zn，Cd和Pb在整个堆肥过程中的灭活效果都非常好，Pb的灭活率达到54.42％。此外，家蝇的生物转化过程促进了猪粪中的富里酸（FA）向腐殖酸（HA）的转化，粪堆肥后HA / FA的最终增加量是不同类型粪便中最大的，对重金属的失活。含-CH的化合物₃和-CH ₂基团减少，芳族结构增强。此外，在生物转化过程中，got的产量相当于新鲜猪粪的13.2％。相关分析结果表明，水分含量是影响三种肥料堆肥中重金属失活率的重要因素。我们的结果表明，家蝇的生物转化过程可以促进堆肥的成熟和重金属的失活，并产生大量的昆虫蛋白，从而产生有益的生态和经济效益。