Liquid waste is the residual yield of a liquid production process that has not been
used again, so it must be processed and managed so as not to cause pollution and
deterioration of environmental quality. Biological wastewater treatment systems can
use bacterial decomposition services. This performance is very much influenced by
several factors, including the amount of waste water, level of impurities, availability
of oxygen (O2), type of dirt and so on. The parameters that are used as controls for
BOD and COD liquid waste quality standards meet the standards. An aerator in the
form of an air pump is used to disperse high-pressure air in oxygen-containing liquid
wastes in the process of aeration effluence, so that when air rises to the surface of the
water there will be oxygen binding. Aerator operation is generally done manually,
resulting in wasteful use of electrical energy. This paper discusses the design of an
aerator operating control system on waste quality standards using two input fuzzy
logic controllers and one output. Input variables used in the form of COD and waste
volume while the output in the form of aerator work operation. The results obtained
indicate that the system design can be applied well and is in accordance with the
setting point with an average operating time of aerator working of 6.8 hours and can
reduce the use of electrical energy by 39.1%.
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