| environ. | refuse-sludge compost compost made from mixture of sewage sludge and compostable refuse or waste; Compost derived by the biodegradation of the organic constituents of solid wastes and wastewater sludges. The major public health issues associated with composting using solid wastes mixed with sewage sludge are pathogens, heavy metal, and odors. The heat generated during composting, as a result of the activities of thermophilic organisms, is capable of killing bacteria, viruses, protozoa and helminths present in sewage sludge. The metallic elements in sludge of greatest concern to human health are cadmium, lead, arsenic, selenium, and mercury. Only cadmium is normally found in sewage sludge at levels which, when applied to soils, can be absorbed by plants, and accumulate in edible parts, thereby entering the food chain | 污泥堆肥 (堆肥产生于对固体废物和废水污泥中的有机成分的生物降解。用固体废物混合污水污泥进行堆肥产生的主要公共健康问题是致病、重金属和异味。堆肥过程中产生的热量是一种嗜热生物活动的结果，能够杀死污水污泥中的细菌、病毒、原生动物和蠕虫。污泥中和人体健康最相关的金属元素是镉、铅、砷、硒和汞。通常在污水污泥中只有镉的含量会对土壤产生影响，会被植物吸收，当植物被动物食用时进入食物链。) |