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.
What is not removed by treatment or partitioned into the wastewater is found in sewage sludge. Sewage sludge is a heterogeneous mix of hazardous materials. The majority of sewage sludge produced in wastewater treatment plants in the United States is disposed of on land, primarily agricultural land. This highly controversial practice is supported by the federal government and regulated by the EPA.