This study focuses on characterization of milk house waste water from eight different farms in Kentucky. The farms were separated into three groups based on the number of cows: small (20-30), medium (30-60), and large (over 60 cows). Samples were collected once a month from four farms and twice a month from the remainder. Samples were analyzed for chemical, biochemical, and microbiological characteristics. Results indicated a large and significant variation in the chemical and microbiological characteristics between the farms. Farm size had a significant effect on the nutrient content of the waste water. Though samples exhibited seasonal variation, there was no trend. Based on the results we will investigate the use of anaerobic-aerobic-anoxic-aerobic sequencing batch reactor (SBR) to treat milk house waste water on a pilot scale.

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Published in Applied Engineering in Agriculture, v. 23, issue 2, p. 165-170.

© 2007 American Society of Agricultural and Biological Engineers

The copyright holder has granted the permission for posting the article here.

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This project was funded through a Kentucky SB-271 Water Quality and Education grant.

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This article is published with the approval of the Director of the Kentucky Agricultural Experiment Station and designated paper number 06-05-010.