Historical Examples. 1  The flashes of lightning were incessant, and nearly blinded me. 2  The footsteps were incessant, and the hurry of them became more and more rapid. 3  I have not had a moment to spare from incessant toil since the 8th. 4  I don't mean that he tells stories; but it's just his incessant grumbling.
Primary and secondary treatments remove about 85% to 95% of pollutants from the wastewater before the treated wastewater is disinfected and discharged into local waterways. Sludge, the byproduct of the treatment process, is digested for stabilization and is then dewatered for easier handling.
Activated sludge. Activated sludge tank at Beckton sewage treatment plant, UK - the white bubbles are due to the diffused air aeration system. The activated sludge process is a type of wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa.