Can the effluent from the filter press used in the treatment of dyeing and printing wastewater with reduced alkalinity be mixed with the effluent from air flotation?
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There is an issue in the process design: we are dealing with printing and dyeing wastewater. The wastewater with reduced alkalinity used to be treated separately; after acid pretreatment, it would go into a filter press for compression. The resulting liquid then entered a regulation tank, from where it proceeded to an air flotation tank and subsequently to a UASB reactor. Could we avoid sending the liquid from the filter press to the regulation tank before the air flotation tank, and instead create a tank after the air flotation tank? In this way, the liquid with a lower pH from the filter press could be mixed with the liquid from the air flotation tank, which has a higher pH, thereby reducing the amount of acid needed to adjust the pH of the water leaving the air flotation tank.
It is necessary to consider the volume of comprehensive wastewater, the volume of wastewater with reduced alkalinity, and the COD of the filtrate