Treatment Technologies for Hospital Waste: There are five broad categories of medical waste treatment technologies: (i) Mechanical. (ii) Thermal. (iii) Chemical. (iv) Irradiation. (v) Biological. (i) Mechanical Process: Mechanical processes are used to change the physical form or characteristics of the waste either to facilitate waste handling or to process the waste in conjunction with other treatment steps. The two [...]
When sewage is discharged into a natural stream or river, the organic matter present in the sewage gets oxidized by bacteria and converted to simple, inoffensive, stable substances. In this process of oxidation the dissolved oxygen (DO) content of the river or stream water is utilized. Due to this deficiency of dissolved oxygen is created in river or stream water. [...]
The process flow sheet or flow diagram is a graphical representation of the sequence in which various unit operations and unit processes are adopted for treatment of sewage at any sewage treatment plant. The design of process flow sheet involves selection of an appropriate combination of various unit operations and unit processes to achieve a desired degree of contaminant removal. [...]