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Pros and Cons of Aerated Stabilization Basins and Activated Sludge Systems
In North America, there are predominantly two systems used to biologically treat industrial wastewater: the aerated stabilization basin (ASB or aerated lagoon) and the activated sludge system. These two systems have far more similarities than differences. Both...
Dissolved Oxygen Uptake Rate (DOUR) Test
Aerobic biological wastewater treatment is based on the ability of microorganisms to utilize dissolved oxygen in the process of breaking down the soluble organic substances present in the process effluent. The dissolved oxygen uptake rate (DOUR) test measures the...
Denitrification Support with EBS CalNit™
Nutrient removal can be a complex challenge for biological wastewater treatment plants, often requiring constant adjustment to get it just right. Some wastewater treatment systems (WWTS) are intentionally designed with anoxic zones for denitrification....
Storm Preparedness and Recovery Plan
High winds and rain from hurricanes have the potential to damage wastewater treatment facilities leading to long, unplanned outages. As we are in the midst of another hurricane season, it is essential for wastewater management teams to take appropriate measures to...
Improving the Performance of Activated Sludge Systems — An Operator’s Perspective
It is generally accepted that aerobic biological treatment systems are robust and stable to the extent that eight key growth pressures are controlled: Organic Loading Dissolved Oxygen Temperature pH Nutrients Retention Time Inhibitory or toxic compounds Biomass --...
6 Tips for Microscopic Evaluation of your Activated Sludge System
EBS believes that monitoring the microbiology (biomass) of your activated sludge system or aerated stabilization basin (ASB) is just as critical as any other test such as pH, nutrients, total suspended solids (TSS), or chemical oxygen demand (COD). Often, the bacteria...
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