Satyawali Y, Balakrishnan M
TERI University, Darbari Seth Block, India Habitat Centre, Lodhi Road, New Delhi 110 003, India.
Bioresour Technol. 2007 Oct;98(14):2629-35. doi: 10.1016/j.biortech.2006.09.016. Epub 2007 Mar 26.
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.
本研究考察了通过对甘蔗渣、甘蔗渣飞灰、锯末、木灰和稻壳灰等各种农业废弃物进行酸活化和热活化制备的19个碳样品，用于去除生物甲烷化酿酒厂废水的颜色。磷酸碳化甘蔗渣B（PH）表现出最大的脱色率（50%）。然而，商业活性炭AC（ME）和AC（LB）表现出更好的性能，脱色率超过80%。除了脱色外，活性炭处理还显示出化学需氧量（COD）、总有机碳（TOC）、苯酚和凯氏氮总量（TKN）的降低。该性能与所研究样品的特性有关。此外，对酿酒厂废水中主要着色化合物类黑素的吸附等温线遵循朗缪尔等温线，这意味着单层吸附。
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