Posted by David Jackson on Mar 24, 2020 in FNI Water™
There are numerous questions in the water and wastewater industry regarding the safety of our workforce who may potentially be exposed to raw wastewater carrying the novel coronavirus. As with any infectious disease outbreak, the industry’s approach to the new coronavirus, which causes COVID-19, should be to continue safe and effective management of our treatment systems while being cautious and practicing proper safety protocols to protect our professional operators. As Clean Water Professionals, our wastewater operators are adept and trained to handle a number of...
Posted by Trey Shanks on Mar 20, 2020 in FNI Water™
As guidance for elected officials and public works agencies, the U.S. Department of Homeland Security has designated water, wastewater, drainage and public works employees as Essential Critical Infrastructure Workers during the COVID-19 emergency.
Also included are electricity industry workers, including those involved in power transmission and distribution, and environmental remediation/monitoring technicians.
Posted by Michael Sherer on Oct 21, 2019 in FNI Water™
Potable reuse is a drought-resilient water supply diversification strategy that many cities are considering for supplementing their water supply.
Although many water sources can be demonstrated to contain treated wastewater contributions, discussion of potable reuse is generally confined to the intentional contribution of wastewater return flows for expansion of water availability. Potable reuse is often distinguished between direct and indirect configurations, depending on whether the return flow is released to an intervening environmental buffer....
Posted by David Jackson on Jul 17, 2019 in FNI Water™
In high-rate activated sludge (HRAS) systems, extracellular adsorption and intracellular storage have been referred to as the dominant mechanisms for capturing organic carbon from wastewater.
However, the quantification of storage products under short sludge retention time (SRT) of HRAS systems has rarely been studied until now. Since the measurement of storage products is complex and dependent on several variables, alternative solutions for substrate removal through storage are required to understand the high-rate...
Posted by Arifur Rahman on Nov 5, 2018 in FNI Water™
Operators of water resource and recovery facilities (WRRFs) are increasingly interested in using carbon-capture technologies such as high-rate activated sludge (HRAS) systems to minimize carbon oxidation and maximize organic carbon recovery and methane potential through biosorption of biodegradable organics into the biomass.
I worked with an international research team to study a universal process model for HRAS for maximizing carbon capture from wastewater.
During our research, we studied models involving the Blue...
Posted by Arifur Rahman on Oct 8, 2018 in FNI Water™
To be more cost-effective and energy-efficient, cities increasingly are shifting their wastewater treatment plants toward energy-recovery systems. And the high-rate activated sludge system (HRAS) is becoming the backbone of energy-efficient wastewater treatment processes.
But not enough research has been done on the various carbon-removal technologies available. And there is a need to better understand and improve nitrogen and phosphorous management in HRAS systems.
Carbon removal technologies include the A-stage of AB...