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.
4. Secondary treatment. Although the visible bits of sludge have been removed, we have to ensure that the smaller and sometimes invisible nasty bugs are also taken out. At our larger sewage treatment works, the wastewater is put into rectangular tanks called âaeration lanesâ, where air is pumped into the wastewater.