Novel use for Cement Production Byproduct as Chemical Coagulant and Flocculant
Class
Article
Graduation Year
2017
College
College of Engineering
Department
Biological Engineering Department
Faculty Mentor
Ronald Sims
Presentation Type
Poster Presentation
Abstract
New nationwide phosphorus standards for effluent wastewater has renewed the emphasis on using chemical coagulants/flocculants for the removal of suspended solids and phosphorus from municipal and industrial wastewater. This study explores a novel chemical coagulant derived from the cement industry, expanded shale. Jar tests were used to test the turbidity, total suspended solids (TSS), and phosphorus removal of the coagulation/flocculation process using the novel coagulant, expanded shale, and an industry standard coagulant, ferric sulfate, for comparison. Sludge obtained from a municipal wastewater treatment plant was diluted to produce a simulated wastewater for jar testing. Simulated wastewater media was turbid (390 NTU) and contained 250 mg/L suspended solids. A range of concentrations of coagulant ((0-250 mg/L ferric sulfate and 0-10 g/L expanded shale) was used to find the optimum turbidity/ TSS reduction for each coagulant. Both coagulants removed a similar amount of suspended solids and phosphorus from the wastewater; however, a much greater concentration of expanded shale was needed to remove similar levels of TSS (2 g/l expanded shale vs 0.25 g/L ferric sulfate). Additionally, expanded shale treatment resulted in increased turbidity and pH of the wastewater. Overall, the ferric sulfate treatment outperformed the expanded shale treatment, however the low cost of the expanded shale and the demonstrated TSS removal may make expanded shale appropriate for some industries.
Location
North Atrium
Start Date
4-13-2017 1:30 PM
End Date
4-13-2017 2:45 PM
Novel use for Cement Production Byproduct as Chemical Coagulant and Flocculant
North Atrium
New nationwide phosphorus standards for effluent wastewater has renewed the emphasis on using chemical coagulants/flocculants for the removal of suspended solids and phosphorus from municipal and industrial wastewater. This study explores a novel chemical coagulant derived from the cement industry, expanded shale. Jar tests were used to test the turbidity, total suspended solids (TSS), and phosphorus removal of the coagulation/flocculation process using the novel coagulant, expanded shale, and an industry standard coagulant, ferric sulfate, for comparison. Sludge obtained from a municipal wastewater treatment plant was diluted to produce a simulated wastewater for jar testing. Simulated wastewater media was turbid (390 NTU) and contained 250 mg/L suspended solids. A range of concentrations of coagulant ((0-250 mg/L ferric sulfate and 0-10 g/L expanded shale) was used to find the optimum turbidity/ TSS reduction for each coagulant. Both coagulants removed a similar amount of suspended solids and phosphorus from the wastewater; however, a much greater concentration of expanded shale was needed to remove similar levels of TSS (2 g/l expanded shale vs 0.25 g/L ferric sulfate). Additionally, expanded shale treatment resulted in increased turbidity and pH of the wastewater. Overall, the ferric sulfate treatment outperformed the expanded shale treatment, however the low cost of the expanded shale and the demonstrated TSS removal may make expanded shale appropriate for some industries.