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Wastewater treatment comprises contacting sludge from a membrane bioreactor with water from a dewatering unit to transfer polyelectrolyte from the water to the sludge before recycling the water
Wastewater treatment comprises contacting sludge from a membrane bioreactor with water from a dewatering unit to transfer polyelectrolyte from the water to the sludge before recycling the water
Wastewater treatment in which excess sludge from a membrane bioreactor (1) is treated with a polyelectrolyte in a dewatering unit (4) comprises contacting the sludge with water from the dewatering unit to transfer polyelectrolyte from the water to the sludge and then recycling the water to the bioreactor and passing the sludge to the dewatering unit.
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