What is Biological Oxygen Demand (BOD)? - Wastewater Digest
WEBOct 27, 2021 · What is Biological Oxygen Demand? Biochemical oxygen demand is the amount of oxygen consumed by bacteria and other microorganisms while they decompose organic matter under aerobic conditions. The common lake or stream contains small amounts of oxygen in the form of dissolved oxygen (DO). Dissolved oxygen is a crucial component of natural water ...
What is Wastewater? | Wastewater Digest
WEBDec 1, 2021 · Wastewater is affected by domestic, industrial and commercial use, thus constantly changing its composition and making it rather difficult to define.
What is Total Suspended Solids (TSS)? - Wastewater Digest
WEBSep 9, 2021 · Any particle that is smaller than 2 microns, on the other hand, is considered a total dissolved solid (TDS). The majority of total suspended solids comprise of inorganic materials; however, algae and bacteria may also be considered TSS. TSS could be anything that floats or “suspends” in water, including sand, sediment, and plankton.
What is Wastewater Treatment? | Wastewater Digest
WEBMar 11, 2021 · Wastewater treatment is the process of converting wastewater into water that can be discharged back into the environment. According to the U.S. EPA, one of the most common forms of pollution control in the U.S. is wastewater treatment. The purpose of wastewater treatment is to speed up the natural processes by which water is purified.
An Overview of Ozone Water Treatment - Wastewater Digest
WEBSep 7, 2021 · Ozone Water Treatment in the Water & Wastewater Industries Ozone is formed naturally in the atmosphere as a colorless gas having a very pungent odor. Chemically, ozone is the triatomic, allotropic form of oxygen having the chemical symbol O3 and a molecular weight of 38. Under standard atmospheric temperature and pressure, it is an unstable gas that decomposes into molecular oxygen. This very ...
What is Activated Sludge? - Wastewater Digest
WEBJun 17, 2021 · Activated sludge refers to a flocculent culture of organisms developed in aeration tanks under controlled conditions, according to WEF. Activated sludge is typically brown in color. Activated sludge is also known as waste activated biosolids or waste activated solids. The sludge consists of a mixed blend …
What is Alkalinity? - Wastewater Digest
WEBSep 14, 2022 · What is Alkalinity in Water? Alkalinity is a measure of water’s ability to resist pH changes that lead to acidity, or to neutralize acids, and maintain a fairly stable pH. This ability is usually referred to as water’s “buffering capacity”. The presence of certain chemicals, including hydroxides, carbonates, and bicarbonates, affects ...
Aerators Enhance Aerobic Digestion Process - Wastewater Digest
WEBMar 29, 2005 · Aerobic digestion is a sludge stabilization process designed to convert waste activated sludge solids to carbon dioxide, water, residual cell debris and other end products. The oxidation of cellular material is referred to as endogenous respiration and is typically the dominant reaction in aerobic digestion. The detention time in the digester ...
Technological Improvements for the Aerobic Digestion of Sludge
WEBAug 22, 2001 · The duration of thickening of waste activated sludge is 5-6 hours with the concentration of the thickened activated sludge 13-15 g/L. The detention time for digestion should be 10-15 days at 20° C with air consumption 6 m3/m3 of mixture in one hour. This scheme has been used in different parts of Russia.
What is Aeration for Wastewater Treatment?
WEBMar 17, 2022 · In municipal and industrial wastewater treatment, aeration is part of the secondary treatment process. The activated sludge process is the most common option in secondary treatment, according to Oxymem. Aeration is an activated sludge process, promoting microbial growth in the wastewater. The …