U4R10
Available as an ebook
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Also part of Water Intelligence Online Digital Reference Library
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Available as an ebook
Please purchase via www.iwaponline.comOpens in new window
Also part of Water Intelligence Online Digital Reference Library
Standard ePrice: £29.00
+ VAT
While major improvements in wastewater treatment have reduced nutrient loading to natural receiving waters, current limits of technology preclude further nutrient reductions using established processes. New, cost-efficient and easily adaptable approaches to wastewater treatment must be designed to reduce total nitrogen (N) and phosphorous (P) in effluents from water resource recovery facilities (WRRFs) further. Our research goal is to develop phycoremediation strategies that employ phytoplankton to remove N (and P) from treated effluents prior to discharge. To make phycoremediation viable within municipal WRRFs that operate at high flow rates and have short in-plant hydraulic residence times, wash out of algal biomass must be prevented, algae must be easily separated and removed from the treated effluent before discharge, and sufficient algal biomass must be retained within or returned to the reactor to ensure stable algal populations within the plant. Therefore we employed immobilization techniques that allow for ease of removal of the algae while removing nutrients at high rates. Results show removal efficiencies up to 100% for nitrate, nitrite, and phosphate with a hydraulic retention time of 6.5 h. These high reduction efficiencies were achieved by incorporating wavelength specific submersible LEDs, maintaining a constant pH, and with constant mixing.
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This project evaluated the quality of data needed to determine relationships between chronic Whole Effluent Toxicity (WET) test results and in-stream biological condition. A data quality...
Municipal wastewater treatment facilities were not specifically designed to remove xenobiotics such as endocrine disrupting compounds (EDCs) and pharmaceuticals and personal care products (PPCPs...
The presence of cationic pollutant metals in municipal wastewater effluent is a concern because stringent discharge requirements cannot always be met...
Phase 3 of the overall WERF project was developed to study eight Phase 2 hypotheses in more depth, beginning in the laboratory (bench-scale) studies and continuing on...
Agencies responsible for wastewater treatment have choices regarding how they manage their treatment process residuals. They can consider them waste products requiring suitable disposal (e.g.,...
Available as eBook only
A multi-year, collaborative study was conducted to investigate the fate and transport of pharmaceuticals and personal care products (PPCPs) in soil...
Available as eBook only
This research project characterized the composition of modern single residential source onsite raw wastewater and primary treated effluent (i.e.,...
Direct analysis of potable water for pathogenic micro-organisms has generally been avoided by water suppliers because pathogens are frequently present intermittently and in low numbers. Direct...