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As the amount of BOD in the system reduces, the total number of bacteria will also decrease.The oxygen demand, as measured by oxygen uptake rate (OUR) will decrease and the environmental will become acceptable for more advanced life forms, such as protozoa or metazoan.

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They are very different in the process but both are used to achieve maximum degradation, while meeting the strict regulations set by the environmental agencies that regulate what is released into the air, ground, or water.

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However, proper aerator placement and routine maintenance are critical to ensuring that system performance does not deteriorate over time.

Whether it is aerobic or anaerobic treatment, each treatment system has its place in the world today.

Different types of aeration are used in ASBs but the most widely used are either surface aerators or diffused aeration systems.

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