What is Aeration for Wastewater Treatment?
Mar 17, 2022 · Aeration is an activated sludge process, promoting microbial growth in the wastewater. The microbes then feed on organic material, forming flocks which easily settle out. Once settled in a separate settling tank, bacteria forming the "activated sludge" flocks are continually recirculated back to the aeration basin, increasing decomposition rates.
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What is Coagulation for Water Treatment? - Wastewater Digest
Mar 8, 2022 · Coagulation treatment is usually carried out before sedimentation and filtration. During the process, a coagulant is added to water, and its positive charge neutralizes the negative charge of suspended contaminants. Neutralization causes suspended particles to bind together (hence the term). In clumps known as “flocs”, these particles sink ...
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What is Total Suspended Solids (TSS)? - Wastewater Digest
Sep 9, 2021 · TSS stands for total suspended solids, and refers to waterborne particles that exceed 2 microns in size. 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.
What is Biological Oxygen Demand (BOD)? - Wastewater Digest
Oct 27, 2021 · Environmental stresses and other human-induced factors can lessen the amount of dissolved oxygen in a water body, however. Biological oxygen demand is essentially a measure of the amount of oxygen required to remove waste organic matter from water in the process of decomposition by aerobic bacteria. To comply with BOD limits, commercial ...
What is Wastewater? | Wastewater Digest
Dec 1, 2021 · Wastewater is used water that has been affected by domestic, industrial and commercial use. The composition of all wastewaters is thus constantly changing and highly variable, which is why it is so difficult to pinpoint a singular definition of the word itself. The composition of wastewater is 99.9% water and the remaining 0.1% is what is removed.
What is Water Filtration? - Wastewater Digest
Nov 10, 2021 · Definition. Filtration is the process in which solid particles in a liquid or gaseous fluid are removed by the use of a filter medium that allows the fluid to pass through while retaining the solid particles. It may mean the use of a physical barrier, chemical, and/or a biological process. The removal of particles takes place with processes ...
What is Total Dissolved Solids (TDS)? - Wastewater Digest
Jul 12, 2021 · A total dissolved solids meter is a handheld device that can be used to give a TDS reading of a water source. Searches on line reveal TDS meters priced between $10 and $100, depending on the brand and the complexity of the device. Dissolved solids naturally increase water’s conductivity. A TDS meter, therefore, measures the conductivity of a ...
What is Alkalinity? - Wastewater Digest
Sep 14, 2022 · 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 water’s alkalinity.