Matos Joan Sanchez, de Aráujo Lara Pinto, Allaman Ivan Bezerra, Lôbo Ivon Pinheiro, de Oliva Sergio Telles, Tavares Tania Mascarenhas, de Almeida Neto Jose Adolfo
Bioenergy and Environment Group, Universidade Estadual de Santa Cruz, Jorge Amado Highway, Km 16, Ilheus, BA, 45662-900, Brazil.
Department of Exact and Technology Sciences, Universidade Estadual de Santa Cruz, Jorge Amado Highway, Km 16, Ilheus, BA, 45662-900, Brazil.
Environ Monit Assess. 2021 Jul 8;193(8):480. doi: 10.1007/s10661-021-09252-2.
The study evaluates Hermetia illucens larvae's ability to decrease direct methane emissions and nutrients from cattle and swine manure. Hermetia illucens larvae were put into fresh cattle and swine manure, and the same conditions, without larvae, for the control treatment were established. The methane emissions were measured until the first prepupae appeared. The methane emissions from the bioconversion of animal manure by Hermetia illucens larvae were up to 86% lower than in the control treatments (conventional storage). The cumulative methane emissions from cattle and swine manure bioconversion were 41.4 ± 10.5 mg CH kg and 134.2 ± 17.3 mg CH kg, respectively. Moreover, Hermetia illucens larvae could reduce 32% of dry matter, 53% nitrogen, 14% phosphorus, and 42% carbon in swine manure. Meanwhile, in cattle manure, reductions of 17% of dry matter, 5% of nitrogen, 11% of phosphorus, and 15% of carbon and pH reductions in both swine and cattle manure were found. Thus, the production of larvae was higher in swine manure than cattle manure. Furthermore, the larvae frass from swine manure was appropriate for agricultural use, unlike the larvae frass from cattle manure requiring further processing. These results reveal the ability of Hermetia illucens larvae to mitigate methane emissions from animal manure and show it to be a promising technology for manure treatment, with great potential to promote a circular economy in the livestock sector.
该研究评估了黑水虻幼虫减少牛和猪粪便直接甲烷排放及养分的能力。将黑水虻幼虫放入新鲜的牛和猪粪便中，并设置相同条件但无幼虫的对照处理。测量甲烷排放直至第一批预蛹出现。黑水虻幼虫对动物粪便进行生物转化产生的甲烷排放量比对照处理（传统储存）低达86%。牛和猪粪便生物转化的累积甲烷排放量分别为41.4±10.5毫克CH/千克和134.2±17.3毫克CH/千克。此外，黑水虻幼虫可减少猪粪便中32%的干物质、53%的氮、14%的磷和42%的碳。同时，在牛粪中，干物质减少17%、氮减少5%、磷减少11%、碳减少15%，并且发现猪和牛粪的pH值均降低。因此，猪粪便中幼虫的产量高于牛粪。此外，猪粪便中的幼虫粪便适合农业使用，而牛粪中的幼虫粪便则需要进一步处理。这些结果揭示了黑水虻幼虫减轻动物粪便甲烷排放的能力，并表明它是一种有前景的粪便处理技术，在促进畜牧业循环经济方面具有巨大潜力。
