Removal of color from biomethanated distillery spentwash by treatment with activated carbons.
This work examined 19 carbon samples prepared by acid and thermal activation of various agro-residues viz. bagasse, bagasse flyash, sawdust, wood ash and rice husk ash for color removal from biomethanated distillery effluent. Phosphoric acid carbonized bagasse B (PH) showed the maximum color removal (50%). However, commercial activated carbons AC (ME) and AC (LB) showed better performance of over 80% color removal. Besides color removal, activated carbon treatment also showed reduction in chemical oxygen demand (COD), total organic carbon (TOC), phenol and total Kjeldahl nitrogen (TKN). The performance was related to the characteristics of the investigated samples. Further, adsorption isotherms for melanoidins, which is the primary coloring compound in distillery spentwash, followed the Langmuir isotherm implying monolayer adsorption.
Satyawali
Y
Y
TERI University, Darbari Seth Block, India Habitat Centre, Lodhi Road, New Delhi 110 003, India.
Balakrishnan
M
M
D002244:Carbon / Q000737:chemistry; D002482:Cellulose / Q000737:chemistry; D002606:Charcoal / Q000737:chemistry*; D060729:Coal Ash; D007220:Industrial Waste / Q000032:analysis*; D012275:Oryza / Q000737:chemistry; D052638:Particulate Matter / Q000737:chemistry; D011108:Polymers / Q000032:analysis / Q000737:chemistry*; D012037:Refuse Disposal / Q000379:methods*; D031786:Saccharum / Q000737:chemistry; D014934:Wood / Q000737:chemistry
D060729:Coal Ash; D007220:Industrial Waste; D052638:Particulate Matter; D011108:Polymers; C011908:melanoidin polymers; D002606:Charcoal; D002244:Carbon; D002482:Cellulose; C027433:bagasse