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.
3. Primary treatment. The wastewater still contains organic solid matter-or human waste. The next stage is to seperate this from the water, and to do this, we put the wastewater into large settlement tanks, which causes the solids to sink to the bottom of the tank. We call these settled solids âsludgeâ.