Studies on reduction of colour, COD and TSS in textile dyeing and printing wastewater by coagulation and adsorption method

Department of Chemistry, Jai Narain Vyas University, Jodhpur-342 005, Rajasthan, India E-mail : rathorejayasingh@gmail.com Department of Chemistry, Govt. College, Nagaur, Rajasthan, India Manuscript received 21 June 2010, revised 05 July 2011, accepted 12 July 2011 Chemical coagulation and flocculation method was used for the laboratory scale investigations for the reduction in colour, COD and total suspended solids in textile dyeing and printing effluent. The COD, TSS and colour removal efficiencies can be obtained by appropriate combination of the aluminum penta hydroxyl chloride (coagulant) and clinoptilolite (flocculant), eversorb and bentonite as adsorbent. The results indicated that the COD, TSS and colour of the effluent can be reduced up to an extent of 65 to 70%. The trend of percent COD, TSS and colour reduction is fairly comparable to that of other chemical substances used by the treatment plants