Electronic Theses and Dissertations

Identifier

1008

Date

2013

Date of Award

11-27-2013

Document Type

Thesis

Degree Name

Master of Science

Major

Civil Engineering

Concentration

Environmental Engineering

Committee Chair

Larry Moore

Committee Member

Stephanie Ivey

Committee Member

Paul Palazolo

Abstract

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.

Comments

Data is provided by the student.

Library Comment

dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.

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