Date of Award
Master of Science
Addition of ferrous chloride can improve wastewater treatment plant process outcomes. In the study, a municipal wastewater treatment plant ceased adding ferrous chloride to its anaerobic lagoon and belt filter press filtrate return streams. Total suspended solids (TSS) and five-day biochemical oxygen demand (BOD5) effluent concentrations and percent removals, primary clarifier BOD5 and TSS effluent concentration and percent removals, sludge volume index (SVI), sludge polymer feed demand, and H2S concentration in biogas on days with ferrous chloride addition were all compared using non-parametric randomization statistical techniques to days without ferrous chloride addition. It was found that plant performance on days with ferrous chloride addition were significantly different (p < .01) for all examined variables except for primary clarifier TSS percent removal. This is in agreement with findings in the wastewater treatment literature that ferrous chloride can control H2S in biogas, improve sludge dewatering, and improve sludge settleability.
dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.
Carlsson, Bjorn, "A Statistical Analysis of the Beneficial Effects of Ferrous Chloride at the T. E. Maxson Treatment Plant" (2013). Electronic Theses and Dissertations. 851.