Using predation of micro-metazoa to reduce excess sludge production in wastewater treatment system is praised an eco-technology of sludge reduction with low-power and no-secondary pollution.

• 利用微型后生动物的捕食作用减少污水处理系统中的剩余污泥产量被誉为能耗低、不产生二次污染的生态化污泥减量技术。