![]() ![]() Lime is sometimes used when treating acidic water. A method known as neutralization is effective when treating industrial wastewater. This is the most effective means of destroying a variety of viruses and bacteria. ChemicalĬhlorine is the chemical most often used in treating sewage and other types of wastewater. Sand filters are sometimes used in the oil water separation process to remove oil and grease particles. Physical methods include sedimentation, aeration and filtration. Aerobic treatment and fermentation are both biological methods. Biologicalīiological methods are normally put in place when the water will be used for drinking purposes. Biotech articles states that the specific methods used generally fall into three categories. The previous section details the processes involved in treating wastewater. ![]() According to Water Use it Wisely, the byproduct of sludge dewatering systems is sometimes used for agricultural purposes. The final stage of treating water will often include removing a sludge that is sometimes referred to as biosolids. UV radiation is also sometimes used to disinfect water. Chlorine and chloramines are chemicals often used during the water treatment disinfection process. This is sometimes referred to as the tertiary treatment phase. More about the primary and secondary treatment of wastewater here. Filtration involves using a variety of filters to catch particles as the water flows through. After these insoluble fragments settle at the bottom through sedimentation, the purified water is filtered out. Aluminum sulfate is a chemical often used in this process. These processes cause particles to stick together so at a later point they can be more easily filtered out. Coagulation, along with flocculation, are methods that require a combination of chemicals. This is where your treatment options begin to diverge. For industrial users, nation pollutant discharge elimination system (NPDES) sets wastewater pretreatment standards that are more strict. Wastewater pretreatment can include everything from twigs and rocks to bottles and diapers. Preliminary treatment normally includes screening the water to remove large objects and debris. Most treatment facilities employ similar steps or combine steps when treating wastewater. According to NYC Environmental Protection, wastewater from New York City goes through five distinct processes that include preliminary, primary and secondary treatments, as well as disinfection and sludge treatment. There are several steps you would normally take when treating wastewater in a municipal facility. Most wastewater is usually released back into the environment after treatment. It can potentially cause severe illness if untreated wastewater gets into the public drinking supply. Wastewater can contain chemical, biological or physical pollutants. There are several important reasons why you need to pay careful attention to how wastewater is processed and the different methods by which to treat it. Melted snow and runoff water from outdoor activities is also wastewater. Water from homes, businesses or industry is considered wastewater. Wastewater is generally defined as water that has already been used in some capacity. What Is the Best Method for Wastewater Treatment? Written by AOS Treatment Solutions on November 10, 2017 ![]()
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