Study on physico-chemical treatment of effluents from biomass gasifier power generation system
by Sunil L. Narnaware; Samir Vahora
International Journal of Environment and Sustainable Development (IJESD), Vol. 21, No. 1/2, 2022

Abstract: The study aimed at a physico-chemical treatment of effluent/wastewater generated from the biomass gasification power generation system. A laboratory study determined the optimum dose of lime (CaOH2) as coagulant and alum (Al2(SO4)318H2O) as flocculants in the proportion of 1:1 g/l of effluent which later applied in the field experiment. The field results showed that freshwater used once could be used for two more recirculation by giving physical settling treatment. Thereafter, the chemical treatment with a predetermined dose of lime and alum was given due to increased load of tar and SPM which made possible to use the wastewater two more recirculation. After fifth-time use, the turbidity increased to 118.3 NTU which could not be brought down further with chemical treatment. The cost of chemical treatment for laboratory-grade chemicals was found ₹0.85 per litre of effluent and ₹0.10/litre of effluent for commercial grade chemicals.

Online publication date: Thu, 02-Dec-2021

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