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Physico-Chemical Characterization of Coir Pith Black Liquor and Coir Pith Effluent

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Author Affiliations

  • 1 School of Environmental Studies, Cochin University of Science and Technology, Cochin, Kerala - 682022, INDIA

Int. Res. J. Environment Sci., Volume 4, Issue (2), Pages 46-49, February,22 (2015)

Abstract

Recent research focuses on the possibility of utilizing coir pith as a substrate for bioenergy production via delignification, saccharification and fermentation. Optimized hydrogen peroxide pretreatment reported as means of coir pith delignification generated coir pith black liquor (CBL). Subsequent lignin recovery from CBL generates coir pith effluent (CPE) and toxicity test had demonstrated the phytotoxic nature of CPE pointing to the need for further effluent characterization and treatment. In this work CBL and CPE were analyzed as per Bureau of Indian Standards for parameters such as pH, conductivity, colour, TDS, TSS, phenolic compounds, COD, Oil and grease, total organic content, and total inorganic content. The parameters that exceeded the permissible limits were pH (12.15), COD (5600 mg/L), TSS (200mg/L), TDS (31510 mg/L) for CBL, and COD (10080 mg/L), phenolic compounds(1.35 mg/L), TSS (114 mg/L) and TDS (42270 mg/L), in the case of CPE. COD and phenolic compounds were found to increase by two fold in case of CPE than CBL. Decolourisation and change of pH from alkaline to acidic occurred in case of CPE.

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