Disposing of excess sludge – the organic remnants of the wastewater treatment process – is a significant economic and environmental challenge for anyone who operates a wastewater treatment plant. The facility needs to treat the wastewater and then remove the biosolids. What if the sludge was not an irritation and instead became a valuable part of the facility’s resource recovery?
A Case for Water Reuse
Recycling water both in acceptance of concept and in practice has steadily increased in recent years. Various factors such as diminishing water supplies, extreme drought, seawater intrusion, population increase, and others have created an urgency for municipalities and industries to explore alternate water supply options. Thankfully, there are innovative solutions, such as membrane systems, that can help facilities looking for reliable water reuse treatment technologies.
Anaerobic Digestion has played a key part in turning wastewater treatment plants (WWTPs) into water resource recovery facilities (WRRFs). The byproduct traditionally called “waste gas” is used as biogas - a renewable, clean, green energy source. Some facilities have been able to generate enough to put renewable natural gas (RNG) into a pipeline and/or send power back to the grid.
From 1973 to 1976, the EPA and the state of California sponsored a pilot study in Carson, California. The final technical report was completed in 1980 and is available on the EPA’s website, entitled Waste Activated Sludge Processing (PDF), document EPA-600/2-80-147.
Several technologies were tested for the handling of waste activated sludge, but the process endorsed by the report was “that dissolved air flotation be adopted for thickening of waste activated sludge.”
Category: Wastewater Treatment
The WWETCO FlexFilter™ from WesTech Engineering received a huge vote of confidence this fall when the State of New Jersey released a report highly rating its performance for the satellite treatment of combined sewer overflows (CSOs).
When a large dairy expressed interest in placing a new Greek yogurt plant in an industrial park in Cortland, New York, the community improved its chance to secure the plant and provide future economic growth by upgrading the City’s wastewater treatment facility so it could offer no-cost trucked waste disposal for the dairy facility.
Once considered to be ordinary and mundane, wastewater treatment is becoming a recognized contributor to the green technology movement. It’s a rising star in the resource recovery world with the adoption of one key ingredient – algae.