The removal of sludge is one of the most critical challenges in the creation of good-quality effluent from wastewater treatment plants. Aside from lessening the environmental impact of human waste, modern wastewater treatment plants (WWTP) haveimplemented advances in science and technology that allow significant, positive inputs, such as creating energy from the plant (eg, biogas such as methane) and in some cases even revenue streams from processed biosolids (eg, nutrient-rich fertiliser for farming). In order for these advanced systems to work effectively, one of the most crucial parameters for plant operators to monitor is the total solids or sludge as it moves through the plant, a task that is carried out by the suspended solids sensor . By measuring the actual height of a given total suspended solids concentration in sedimentation tanks, an operator can ensure they only extract and waste the desired higher concentration of sludge, leaving lower concentrations to remain for additional sedimentation.
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