Removal of pollutants present in wastewater by inactive biomass of Pseudomonas sp.
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Date
2020-12
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G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand)
Abstract
The present study was undertaken to assess the pollutant removal efficiency of bioadsorbent from mixed water consisting both domestic and industrial waste water. Bioadsorbent was prepared by dead biomass of Pseudomonas fluorescence.To determine
pollutant characteristics initial concentration of various parameters of wastewater were analyzed. The prepared bioadsorbent were used to remove various water pollutants that include BOD, COD, sodium, potassium, chloride and Kjeldahl nitrogen present in
wastewater sample. Treatment of wastewater was carried out using different dosages (8g, 12g and 16g)of bioadsorbent prepared by dead biomass of above bacteria in 1 liter of the wastewater sample at 3 different contact times (30, 60 and 90min) and pH (4,6 and 8). Maximum biosorption of pollutants were observed using 16g/l dosage, at 6 pH with 90 min contact time. For evaluating removal efficiency of bioadsorbent it was used for further second and third cycles which concludes that by increasing cycles its removal efficiency get reduced. For regeneration of bioadsorbent NaOH was used which make it efficient and ecofriendly
option for wastewater treatment having higher efficiency to remove pollutants in very less contact time. For analyzing removal efficiencies of various pollutants levels using bioadsorbent was also studied through Langmuir and Freundlich adsorption isotherm
models. In the present study Freundlich adsorption isotherm model was found to be more applicable and favorable. The removal efficiencies of various pollutant levels were analyzed statistically by using regression analysis. Based on results obtained, it is noted that dry biomass of Pseudomonas fluorescens as a bacterial bioadsorbent would be a good option for the removal of pollutants present in wastewater consisting both domestic and industrial.