Performance exploration and microbial dynamics of urine diverting composting toilets in rural China
文献类型: 外文期刊
作者: Jiabin Li;Xue Liu;Luyao Li;Changxiong Zhu;Liangguo Luo;Yuanyi Qi;Lan Tian;Zhuobo Chen;Jin Qi;Bing Geng
作者机构:
关键词: Bacterial community;Human feces;Resource utilization;Urine separating composting toilet
期刊名称: Journal of Environmental Management
ISSN: 0301-4797
年卷期: 2022 年 321.0 卷
页码:
收录情况: SCIE(2022版)
摘要: The ongoing "toilet revolution” in China provides new opportunities to improve the rural living environment and sanitation, and the introduction of new sanitation facilities such as urine diverting composting toilets (UDCTs) is conducive to the effective treatment and resource utilization of feces. This study revealed the degradation performance and microbial community dynamics of UDCTs and clarified the influence mechanism of fecal volume in aerobic composting treatment. The results showed that UDCTs could effectively decompose human feces, with an organic matter degradation rate of 25%⁓30%. The temperature, water content, NH4+-N and nutrient accumulation were higher in the high fecal volume treatment than in the low fecal volume treatment. Bacterial community composition and structure in UDCTs varied with composting stage and fecal volume. The diversity and richness of bacterial community in compost were changed with different fecal volumes, but the dominant groups were similar. Redundancy analysis (RDA) showed that nitrogen and organic carbon were the main drivers of bacterial community changes during composting. Highly nutritious and non-phytotoxic compost products were suitable for agronomic uses. Based on these results, UDCTs can be an effective way to solve the problem of fecal pollution in rural areas, and fecal dosage is a potential influencing factor in the operation and maintenance of composting systems.
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