Theses and Dissertations

Issuing Body

Mississippi State University


Kröger, Robert

Committee Member

Tucker, Craig S.

Committee Member

Allen, Peter J.

Date of Degree


Document Type

Graduate Thesis - Open Access


Wildlife and Fisheries Science

Degree Name

Master of Science


College of Forest Resources


Department of Wildlife, Fisheries and Aquaculture


Water management practices to reduce mass discharge are a major point of concern for aquaculture producers. This study assessed effects of consecutive low-grade weirs on chemical retention and settling of aquaculture pond effluent in a single drainage ditch. Two control and nine treatment discharges were conducted September - October 2012. Control discharge dissolved inorganic phosphorus (DIP) load increased 154%, whereas total inorganic phosphorus (TIP), ammonia, and nitrate loads decreased (47%, 43%, and 63%, respectively). Treatment discharge nutrient loads decreased across all analytes (80% DIP, 86% TIP, 89% ammonia, 89% nitrate). However, control and treatment discharges concentrations of DIP and nitrate increased, whereas TIP and ammonia concentrations decreased. All discharges reduced total and volatile suspended solid loads 72% - 94%, with removal rates of 0.02 ± 0.01 mg/L/min total and 0.02 ± 0.001 mg/L/min volatile suspended solids. Results indicate ditches fit with low-grade weirs may be an innovative management practice.



effluent||mitigation||nutrients||aquaculture||suspended solids||weir