Abstract: The accumulation of the nitrification intermediate, nitrite, is undesirable because of its toxicity to fish. The elevated nitrite concentration in wastewater‐treatment processes significantly increases the amount of chlorine ...

Abstract: Microbial by‐products are present in large quantities in both activated sludge (AS) systems and chemostat pure cultures. In wastewater AS systems, these by‐products impose additional organic loads on downstream processes. ...

Abstract: One of the enironmental concerns associated with on‐site wastewater disposal is nitrate contamination of groundwater. The purpose of this study was to design and monitor an experimental on‐site watewater disposal system ...

Abstract: Activated sludge (AS) foams from two wastewater treatment plants are characterized. The foams contained a significant amount of substrate and lipid. Their contents varied from plant to plant and even within the same plant. ...

Abstract: Conventional aerobic sludge stabilization requires extensive energy input. Incorporation of endogenous nitrate respiration (ENR) into the aerobic‐digestion system offers the energy‐saving advantage. In the ENR system, ...

Abstract: Alternating aerobic/anoxic (A/A) digestion of waste activated sludge offers many advantages over traditional (aerobic or anaerobic digestion) methods. However, one of the main concerns in A/A digestion is the development ...

Abstract: Fluoride removal by activated alumina, Type F‐1, depends primarily on the pH and surface loading. The optimal pH for fluoride removal is approximately 5. However, at