Substance of biological methods for sewage treatment is the use of the life and activity of microorganisms for sustainable organic substances in wastewater. They use organic compounds and certain minerals as a source of nutrition and create energy. In the process, they get the material substance to build cells, growth and spawning biomass should be increased. This method is commonly used to clean up the categories which contain organic substances dissolved or dispersed small substances, glues. As such, they are often used after the kinds of impurities in crude out of the dispersion of waste water. The study found that microorganisms that can decompose organic substances are all in nature and many of the artificial synthesis of organic compounds
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