Bioremediation is a process that uses mainly microorganisms, plants, or microbial or plant enzymes to detoxify contaminants in the soil and other environments. Chlorine is fed into the water to kill pathogenic bacteria, and to reduce odor. Done properly, chlorination will kill more than 99 percent of the harmful bacteria in an effluent.The incoming wastewater passes through screening equipment where objects such as rags, wood fragments, plastics, and grease are removed. The material removed is washed and pressed and disposed of in a landfill. The ideal solution for eliminating toxicity and providing a safe environment is biodegradation using microorganisms like Azotobacter species that work against rhizosphere and pollutants. It also helps to improve fertility and works as chemical removal of pollutants. The aerobic bacteria in the sludge digest the organic material around them in order to reproduce and grow, and change the chemical makeup of the sludge, oxidizing ammonia into nitrate and nitrite in a process of nitrification.

The ideal solution for eliminating toxicity and providing a safe environment is biodegradation using microorganisms like Azotobacter species that work against rhizosphere and pollutants. It also helps to improve fertility and works as chemical removal of pollutants. The microbes simply eat up contaminants such as oil and organic matter convert them and then let off carbon dioxide and water. Microorganisms help in cleaning up the environment. They decompose dead and decaying matter from plants and animals; convert them into simpler substances which are later used up by other plants and animals. Thus, they are used to breakdown harmful substances. Filtration of the effluent of the simultaneous precipitation process highly improved the removal of micro-organisms, in particular when 3–7 gFe m−3 was added before filtration. Tertiary precipitation(25 gFe m−3) also resulted in improved removal of all micro-organisms. In bioremediation, microorganisms with biological activity, including algae, bacteria, fungi, and yeast, can be used in their naturally occurring forms. Pollution prevention(P2) is any practice that reduces, eliminates, or prevents pollution at its source before it is created. As by the EPA Waste Management Hierarchy, P2, also known as "source reduction," is fundamentally different and, where feasible, more desirable than recycling, treatment or disposal.

After the water has been filtered, water treatment plants may add one or more chemical disinfectants to kill any remaining parasites, bacteria, or viruses. Bioremediation is a process that uses mainly microorganisms, plants, or microbial or plant enzymes to detoxify contaminants in the soil and other environments. The ideal solution for eliminating toxicity and providing a safe environment is biodegradation using microorganisms like Azotobacter species that work against rhizosphere and pollutants. It also helps to improve fertility and works as chemical removal of pollutants. When we talk about microbes that are able to clean up oil, we're talking primarily about bacteria and fungi. Bacteria can break down oil to carbon dioxide and water. However, no single organism can break down all the components of crude oil or refined fuels spilled into the environment. Microorganisms such as fungi, bacteria, and algae perform the detoxification by using the organic chemicals for food similar to our own digestive process. The microorganisms used in the process may be native to the area or specially grown in a laboratory. Microbes such as bacteria, fungi, and algae play an important role in the bioremediation of xenobiotic compounds like dyes and plastic including pesticides and insecticides like morpholine, methyl parathion, organophosphorus compounds, and benzimidazoles. Chlorine is fed into the water to kill pathogenic bacteria, and to reduce odor. Done properly, chlorination will kill more than 99 percent of the harmful bacteria in an effluent. After the secondary sedimentation process the effluent is chlorinated by adding chlorine or hypochlorite to water. This method is used to kill certain bacteria and other microbes before it is released as treated effluent. In particular, chlorination is used to prevent the spread of waterborne disease. The analysis revealed that mechanical treatment processes were responsible for a substantial emission of anaerobic bacteria into the air. In both the sewage and air samples, Clostridium perfringens pathogen was identified. The aerobic bacteria in the sludge digest the organic material around them in order to reproduce and grow, and change the chemical makeup of the sludge, oxidizing ammonia into nitrate and nitrite in a process as nitrification. Water disinfection means the removal, deactivation or killing of pathogenic microorganisms. Microorganisms are destroyed or deactivated, resulting in termination of growth and reproduction.