11/5/2023 0 Comments Method of wastewater treatment![]() This is a solid-liquid separation process where the least possible residual moisture is required in the solid phase and the lowest possible solid particle residues are required in the separated liquid phase.Īn example of this includes dewatering of sludge from industrial wastewater or sewage plant where the residual moisture in dewatered solids determines the disposal costs and the centrate quality determines the pollution load returned back to the treatment facility. Chemicals prevent the bacteria from reproducing in water, thus making the water pure. Neutralization is a technique where an acid or base is added to bring the water to its natural pH of 7. Another oxidizing agent used for purifying the wastewater is ozone. Chlorine, an oxidizing chemical, is commonly used to kill bacteria which decomposes water by adding contaminants to it. Secondary treatment removes most of the solids present in wastewater, however, some dissolved nutrients such as nitrogen and phosphorous may remain.Īs the name suggests, this treatment involves the use of chemicals in water. Composting: A type of aerobic process where wastewater is treated by mixing it with sawdust or other carbon sources.Anaerobic processes: Here, fermentation is used for fermenting the waste at a specific temperature.Aerobic processes: Bacteria decomposes the organic matter and converts it into carbon dioxide that can be used by plants.Microorganisms metabolize organic matter in the wastewater in biological treatment. This uses various biological processes to break down the organic matter present in wastewater, such as soap, human waste, oils and food. ![]() The grease found on the surface of some wastewater can also be removed easily through this method. The sand filter is the most commonly used filter. You can use special kind of filters to pass the wastewater and separate the contaminants and insoluble particles present in it. Filtration, the third method, is used for filtering out all the contaminants. This process consists of circulating air through the water to provide oxygen to it. Once the insoluble material settles down at the bottom, you can separate the pure water.Īnother effective physical water treatment technique includes aeration. One of the main techniques of physical wastewater treatment includes sedimentation, which is a process of suspending the insoluble/heavy particles from the wastewater. No chemicals are involved in this process. Processes like screening, sedimentation and skimming are used to remove the solids. In this stage, physical methods are used for cleaning the wastewater. ![]() Let us learn about these processes in detail. This wastewater is unfit for human consumption or use.įortunately, we can make the wastewater potable and usable by employing wastewater treatment technologies that filter and treat the wastewater by removing contaminants such as sewage and chemicals.įour common ways to treat wastewater include physical water treatment, biological water treatment, chemical treatment, and sludge treatment. A common byproduct of our current lifestyle includes wastewater, which can either be in the form of water running down the shower or runoff from wet roads. Our modern lifestyle provides us the luxury of using various products to make our lives more comfortable and easy, but it comes at a price.
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