Sludge Treatment
{"name":"Sludge Treatment", "url":"https://www.quiz-maker.com/QC5A8C7JQ","txt":"Usually the first step in sludge treatment because it is impractical to handle thin sludge, a slurry of solids suspended in water, Biological process in which organic solids are decomposed into stable substances, The process Which its management costs are usually ranging from 20% to 60% of the total operating costs of the wastewater treatment plant.","img":"https://www.quiz-maker.com/3012/images/ogquiz.png"}