马玲同学在国际刊物发表论文

我系胡真虎教授课题组研究生马玲同学题为“Ammonia and phosphorous precipitation through struvite crystallization from swine wastewater with high suspended solid” 的论文被期刊《Water Science and Technology》接收发表。

摘要如下：

Anaerobic effluent of swine wastewater contains high concentration of suspended solid (SS), phosphate (PO4-P), ammonia nitrogen (NH4+-N), and heavy metals such as copper (Cu) and zinc (Zn), posing eutrophication and environmental risk if it was discharged into water body. Struvite crystallization is a promising way to simultaneously recover NH4+-N and PO4-P from wastewater. However, the information is very limited for recovering NH4+-N and PO4-P through struvite from wastewater containing high SS and heavy metals. In this study, the precipitation of NH4+-N and PO4-P through struvite process from real swine wastewater was investigated. The results showed that the amount of formed struvite precipitate of NH4+-N and PO4-P from swine wastewater increased as pH increased from 7.5 to 10.0. The recovery of NH4+-N and PO4-P reached the maximum of 71% and 85%, respectively, at pH 9.5. The contents of Cu and Zn in the struvite precipitates were up to 130 mg kg(-1) and 400 mg kg(-1), respectively. When polymeric aluminum (PAC) and polyferric sulfate (PFS) were separately added as coagulants, 23.9%-40.0% and 17.3%-32.4% of SS were correspondingly removed. In the following struvite crystallization process, 79% of NH4+-N and 100% of PO4-P were precipitated. The contents of Cu and Zn in struvite precipitates declined to 53 mg kg(-1) and 152 mg kg(-1), correspondingly. Combined flocculation and struvite crystallization process can effectively remove SS from the liquid, increase the recovery of NH4+-N, and decrease content of Cu and Zn in struvite precipitate, reducing the environmental risk of struvite as fertilizer.

论文链接：http://www.deswater.com/DWT_abstracts/vol_116/116_2018_258.pdf