International Journal of Life science and Pharma Reviews (IJLPR)  
International Journal of Life science and Pharma Research (IJLPR)
Pharmaceutical Sciences
Volume 10 Issue 5, December 2020    Pages:63-70
Pharmaceutical Effluent Reduction through Recycling of Methylene Dichloride by Using Green Process and Treatment Methodology

Thanigaivelu S and Dr. K. Ramamohan Reddy
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DOI: 10.22376/ijpbs/lpr.2020.10.5.P63-70
Pharmaceuticals industries are majorly consuming methylene dichloride as one of the solvent. After pharmaceutical processing, hazard wastes of effluent are being generated. Hazard wastes are highly harmful to environment and health. Hazard waste stream of methylene di chloride had been identified as spent solvent which have been incinerated or selling from the industry. Experimental evidence had been created to find the best possible solution to convert the specific stream of hazard waste in to pure methylene dichloride which will be recycled into the process. The study aimed to find the optimum methodology and commercial scale application of the process to get pure quality of methylene di chloride from waste stream. Treatment technology developed and focused with three fundamental treatment steps. The primary treatment involves treating of the spent waste with calcium chloride which removes the moisture and followed by simple distillation operation. It helps to removes major moisture and elimination of salts.  Secondary treatment involves treating with molecular sieves to achieve the moisture almost to anhydrous level. Third treatment had developed with carbon treatment to remove color in the recovered solvent. Tertiary treatment ensures for meeting the clear liquid and matches with fresh solvent. The developed process provides the better yield and better process control with less emission mechanism. Recovered methylene dichloride sample was tested with various analysis tools, which were meeting all defined quality parameters. The major advantage of the developed process had been achieved all quality parameters and it can be scaled up for the commercial application with less cost of operation.  
Keywords: Pharmaceutical waste, Adsorption, molecular Sieve, Spent waste of methylene dichloride, Waste reduction, Carbon.
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