Home and community composting are considered potential tools for the self-management of organic waste. The production of added value products from biowaste is an encouraging step further to valorise this waste stream. To increase the profits of homemade compost, this paper presents a strategy to produce enriched home compost with biopesticide properties through a simple and low-cost process. Bacillus thuringiensis (Bt) was inoculated in a home composter bin through a solid inoculum previously prepared using the same waste as substrate. The process was monitored and compared with a home composting control process without inoculation. Final composts were analysed and compared in terms of physicochemical and microbiological properties, respiration and germination indices, indicating the suitability of both to be used as organic amendments. Also, a standardized toxicity test proved that Bt-enriched compost can be safely applied to the soil. Microbiological analysis revealed highly diverse communities in both cases, with limited differences at phylum taxonomic level, but dissimilar relative abundances of species within phylum. Bacteroidetes and Proteobacteria were dominant, with the presence of species able to transform organic matter from vegetal origin, but not usually related to compost. Bt-cristal toxin was clearly present in Bt-enriched compost, indicating the coexistence of Bt with the different microbial populations till the end of the composting process. Although Bt has been widely investigated due to its biopesticide properties, the incorporation of this microorganism to home composting level has not been previously reported.

家庭和社区堆肥被认为是有机废物自我管理的潜在工具。利用生物废物生产增值产品是鼓励这种废物流进一步发展的令人鼓舞的一步。为了增加自制堆肥的利润，本文提出了一种通过简单且低成本的过程生产具有生物农药特性的浓缩家庭堆肥的策略。苏云金芽孢杆菌（Bt）通过以前使用相同废物作为底物制备的固体接种物接种到家用堆肥箱中。对该过程进行监控，并与未经接种的家庭堆肥控制过程进行比较。对最终堆肥进行了分析，并根据理化和微生物学性质，呼吸和发芽指数进行了比较，表明两者均适合用作有机改良剂。此外，标准化的毒性测试证明，富含Bt的堆肥可以安全地应用于土壤。微生物学分析显示，两种情况下的群落高度不同，门类分类水平的差异有限，但门内物种的相对丰度却不同。拟杆菌和变形杆菌占主导地位，存在能够从植物来源转化有机物的物种，但通常与堆肥无关。富含Bt的堆肥中显然存在Bt晶体毒素，表明Bt与不同微生物种群共存，直至堆肥过程结束。尽管由于其生物杀虫剂性质而对Bt进行了广泛的研究，但以前尚未报道过该微生​​物掺入家庭堆肥水平。