Andrew Pham
"Reducing Resource and Environmental Impacts in Water Resource Recovery Facilities: Design Practices for Small Communities"
Although water resource recovery facilities (WRRFs) reduce environmental impacts related to water quality, their construction and operation result in negative environmental impacts in other categories. The Life Cycle Assessment methodology was used to evaluate and compare the inventory and environmental impacts of nine small WRRFs, most of which are serving slow growing or declining populations. From the analysis, three opportunities for impact mitigation were identified. The first suggested practice is to avoid significant overdesign by planning for no lower than a 75% capacity utilization. Other suggested practices were focused on the conveyance process element, namely, to minimize non-process facility area and to use polyvinyl chloride pipe instead of ductile iron pipe where possible.
Noelle Atieno Mware
"Effectiveness of alkaline stabilization in the reduction of antimicrobial resistance in beef cattle manure"
The antimicrobial resistant bacteria (ARB) and antimicrobial resistance genes (ARGs) in livestock manure can pose a public health threat when they are introduced to the environment. Alkaline stabilization, an EPA approved method to reduce pathogens in biosolids from municipal wastewater treatment plants, was used in this study for treatment of beef cattle manure by lime addition. Alkaline stabilization reduced the absolute abundance of 16S rRNA, intI1, and ARGs by 1-2 orders of magnitude. There was a significant difference in tet(O), tet(X) and intI1 genes concentration between lime treated and no lime treated manure in the field study. The results from this study show that alkaline stabilization by lime addition can be used as a low-cost management practice to mitigate antibiotic resistance in beef cattle manure.
April 2, 2021
11:00 AM
Zoom Meeting ID:936 7162 2250
https://unl.zoom.us/j/93671622250#success
More details at: http://cee.unl.edu