Phycoremediation of pollutants from secondary treated coke-oven wastewater using poultry litter as nutrient source: a cost-effective polishing technique

Author:

Rai Abhilasha1,Sen Aniket2,Sarkar Biswajit1,Chakrabarty Jitamanyu3,Mondal Bikash Kumar1,Dutta Susmita1ORCID

Affiliation:

1. Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, West Bengal 713209, India

2. Department of Biotechnology, Heritage Institute of Technology, Kolkata, West Bengal 700107, India

3. Department of Chemistry, National Institute of Technology Durgapur, Durgapur 713209, West Bengal, India

Abstract

Abstract This article focuses on the phycoremediation of pollutants from secondary treated coke-oven effluent through a green and economical route. A microalgal sample was collected and identified as a consortium of Chlorella sp. and Synechococcus sp. The culture cost was reduced by using poultry litter extract as supplementary material to BG-11 medium. Since the major pollutants present in real secondary treated coke-oven wastewater are phenol, ammoniacal-N (NH4+) and cyanide, several matrices were designed with these three major pollutants by varying their initial concentrations such as phenol (2–10 mg/L), cyanide (0.3–1 mg/L) and NH4+ (100–200 mg/L), termed as simulated secondary treated coke-oven wastewater. Maximum removal was observed with individual solutions of phenol (4 mg/L), cyanide (0.6 mg/L) and NH4+ (175 mg/L), while maximum removal in simulated secondary treated coke-oven wastewater was observed at higher concentrations of phenol (8 mg/L) and cyanide (0.8 mg/L) and the same concentration of NH4+ (175 mg/L). A consortium was found effective to meet statutory limits of pollutants. Kinetic model was developed for predicting growth of consortium and observed that the poultry litter extract-enriched BG-11 medium showed higher values of maximum specific growth rate (0.56 per day) and carrying capacity (1,330 mg/L) than that in BG-11 medium only.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

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