However, in current main biochemicalsewagetreatment technology, the aeration devices are the primary energy-consuming equipments, which system costs about 50-70% of the total power consumption.
BOD (biochemical oxygen demand) is an important index to evaluate the quality of water in environmental monitoring and sewagetreatment.
即生化需氧量，是环境监测与污水处理中评价水质的一项重要指标。
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The Horizontal Type Invert Umbrella Surface Aerator is a vertical-shaft and low-speed aerator. It can be used in the biochemicaltreatment of municipal sewage and industrial wastewater.