Use of cationic polymers to reduce pathogen levels during dairy manure separation

JOURNAL OF ENVIRONMENTAL MANAGEMENT

卷:166

Article

Liu, Zong¹  Carroll, Zachary S.²  Long, Sharon C.³  Gunasekaran, Sundaram¹  Runge, Troy¹ 

[1] Univ Wisconsin, Dept Biol Syst Engn, Madison, WI 53706 USA

[2] Univ Wisconsin, Dept Civil & Environm Engn, Madison, WI 53706 USA

[3] Univ Wisconsin, Wisconsin State Lab Hyg & Soil Sci, Madison, WI 53706 USA

关键词: Dairy manure separation;    Pathogen indicators;    Escherichia coli reduction;    Cationic polymers;   

DOI  :  10.1016/j.jenvman.2015.10.033

来源: Elsevier

【 摘 要 】

Various separation technologies are used to deal with the enormous amounts of animal waste that large livestock operations generate. When the recycled waste stream is land applied, it is essential to lower the pathogen load to safeguard the health of livestock and humans. We investigated whether cationic polymers, used as a flocculent in the solid/liquid separation process, could reduce the pathogen indicator load in the animal waste stream. The effects of low charge density cationic polyacrylamide (CPAM) and high charge density cationic polydicyandiamide (PDCD) were investigated. Results demonstrated that CPAM was more effective than PDCD for manure coagulation and flocculation, while PDCD was more effective than CPAM in reducing the pathogen indicator loads. However, their combined use, CPAM followed by PDCD, resulted in both improved solids separation and pathogen indicator reduction. (C) 2015 The Authors. Published by Elsevier Ltd.

【 授权许可】

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