Use of the swine wastewater in the biostabilization of urban green residues

Abstract Green solid residues from urban pruning, rests of agricultural products and swine wastewater are problems in urban and rural areas. A alternative to stabilization of these residues is composting followed by wormcomposting. In this study the integration of composting and wormcomposting in the biostabilization of the urban green solid residues with swine wastewater and commercial activators was evaluated. The results showed the possibility of the swine wastewater utilization as inoculate agent, in substitution of commercial activator, with the objective of producing subsegmently wormcomposts. The metals zinc and copper were detected in obtained wormcomposts, however, their concentrations did not offer risk for human health, plants and soil contamination.

摘要 城市修剪产生的绿色固体废弃物、农产品残余物以及养猪废水是城乡地区普遍存在的环境问题。针对这类废弃物的稳定化处理，可行方案之一为先进行好氧堆肥，再辅以蚯蚓堆肥工艺。本研究评估了将好氧堆肥与蚯蚓堆肥相结合，搭配养猪废水与商用活化剂，用于城市绿色固体废弃物生物稳定化处理的效果。研究结果表明，养猪废水可作为接种剂替代商用活化剂，以此实现规模化蚯蚓堆肥产品的生产。最终获得的蚯蚓堆肥中检出锌与铜两种金属元素，但二者的浓度均未对人体健康、农作物生长及土壤环境造成污染风险。