Sewage/Wastewater Treatment: Water management systems, complete sets of sewage treatment equipment, dissolved air flotation (DAF) systems, trash racks, filtration and sedimentation equipment, evaporators, crystallizers, disinfection and sterilization systems, filters, aeration equipment, water treatment chemicals, oil-water separation equipment, sludge treatment, disposal and resource utilization, filter presses, centrifuges, blowers, etc.