TREATMENT OF EFFLUENT GENERATED DURING PREPARATION OF REGENERATIVE CELLULOSE FROM RICE STRAW USING GREEN LIQUOR SOLUTION FOR RECYCLING AND SAFETY PURPOSES

Abstract

The purpose of this study is to treat the effluent which is generated during preparation of regenerated cellulose (RC). It was estimated from previous researchers that for one metric ton of regenerated cellulose preparation, in an around 150 m3 of effluent generated. If we do not utilize this effluent then we are bound to use enormous amount of fresh water again and again in every new process and also if we discharge this effluent directly in the environment then it will badly affect the environment and lead to environmental pollution. So main focus of this study is to save the fresh by recycle the treated water if the yield of RC for treated and untreated water is approximately same or if we do not get the best desired yield then treated water can safely discharge in the environment. For treatment electro coagulation method is used in this study. After collecting the effluent its initial parameters value like BOD, COD, TOC, TDS, and TSS was evaluated and then these values are compared with the standard value set by CPCB and WHO. It was observed that these values are higher than the standard value so it needs treatment. After treatment the cod is reduced about 68%, others value like BOD, TDS, TSS, TOC is reduced about 60% and yield of RC with untreated water is about 46.54% and after treatment yield of RC is about 42%. This yield calculation based on the holocellulose used and the amount of RC we get. Apart from that this study also focuses on the optimum condition of electro coagulation process to get the best desired result. For this effect of time on COD percentage removal, effect of PH on COD percentage removal, effect of current density COD percentage removal was evaluated.