What is Aeration for Wastewater Treatment?
网页2022年3月17日 · 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.
What is Biological Oxygen Demand (BOD)? - Wastewater Digest
网页2021年10月27日 · Sources of BOD. Sources of biological oxygen demand include leaves and woody debris; dead plants and animals; animal manure; effluents from pulp and paper mills, wastewater treatment plants, feedlots, and food-processing plants; failing septic systems; and urban storm water runoff.. One of the most important nutrients affecting BOD in aquatic systems — especially in recent times — is ...
What is Total Suspended Solids (TSS)? - Wastewater Digest
网页2021年9月9日 · 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 Wastewater? | Wastewater Digest
网页2021年12月1日 · 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 Coagulation for Water Treatment? - Wastewater Digest
网页2022年3月8日 · 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 Alkalinity? - Wastewater Digest
网页2022年9月14日 · 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.
What is Effluent? - Wastewater Digest
网页2021年10月27日 · Effluent is sewage that has been treated in a septic tank or sewage treatment plant. It is also referred to as “trade effluent” or “wastewater.”. Effluent is waste other than waste from kitchens or toilets, surface water or domestic sewage. It can be produced and discharged by any industrial or commercial premises.
What is Flue Gas Desulfurization? - Wastewater Digest
网页2022年1月4日 · Flue gas desulfurization is the process of removing sulphur compounds from the exhaust emissions of fossil-fueled power stations. This is done through the addition of absorbents, which can remove up to 95% of the sulphur dioxide from the flue gas. Flue gas is the emitted material produced when fossil fuels such as coal, oil, natural gas, or ...
What is Total Dissolved Solids (TDS)? - Wastewater Digest
网页2021年7月12日 · 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 …