Abstract

Study on livestock and poultry excrement pollution prevention and resource to cultivation microalgae

Author(s): Xueping Huang, Lu Huang, Jinbao Wan, Yong Ji, Yong Dai, Panrong Li

The pollution produced by the excrement of livestock and poultry is becoming more and more prominent and the dejection of domestic animals must be rationally treated and utilized. The anaerobic fermentation is an important pollution control technology, however, it also may produce many biogas slurry and residues and very likely leads to the secondary pollution especially when there is no proper treatment. Biogas slurry is used as a microalgae growth medium which could obtain bio-diesel and purifies biogas slurry, therefore, it can achieve not only effective environmental protection but also waste reduction, hazardless and efficient utilization. The authors’s experimental results showed that Chlorella vulgaris can grow advantageously in the swine wastewater environment and the utilization of pig wastewater to culture microalgae can achieve the goal of piggery wastewater’s purification.