The concentration of suspended solids in scration tanks of the activated slide process is called RAS SRT Ssr MLSS Trickling filtration process is a type of (a) Suspended growth processes (b) anaerobic Processes (c) Attached growth processes (d) Aerobic Processes (d) Aerobic Processes Sludge treatment includes (a) Softening (b) Digestion (c) Chlorination (d) All of the above

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Biological Processes

Biological solid waste includes bacterial and contaminated waste produced by living individuals. Its treatment is essential to prevent the spread of any air-borne or water-borne diseases or diseases transmitted from one organism to another in a food chain. There are many benefits of the biological solid waste treatment and some of them are: the minimized quantity of waste substance, waste control, eradicating any disease-causing pathogens, generation of biogas, composting, anaerobic digestion, bio drying, mechanical biological treatment, microbial fuel cell, phytoremediation, and biofiltration. The final products of the biological solid waste treatment may be recycled to obtain organic fertilizers or disposed of in SWDS (Solid Waste Disposal Site) after proper treatment.