anaerobic digestion of nssc pulping effluent
نویسندگان
چکیده
two uasb reactors r-i and r-ii, each of 10liters capacity, made up of acryl material wereoperated parallel and continuously for a period of 220 days, using actual effluent of the nssc pulp and papermill, at mesophilic temperature and neutral ph. the main objective was to investigate the treatabilityperformance of the reactors at varying olr and hrt in terms of toc and lignin removal. the reactor r-i wasused by conventional procedure, whereas, for the reactor r-ii methanol and activated carbon was added tosupplement its efficiency. corresponding to an optimum olr of 4.5kg/m3-day and hrt of 18hrs, the reactorr-ii gives 69% toc and 60% lignin removal. but, in the reactor r-i at same operating conditions, only 56%toc and 51% lignin removal was noticed. however, the biogas yield in the reactor r-i was noticed relativelymore than in the r-ii. the biogas yield observed was 0.28m3/kg-codrem and 0.18m3/kg-codrem in the reactorr-i and r-ii, respectively, with 56-58% methane content in both the reactors. the average vfas concentrationobserved in the reactor r-i and r-ii is 360mg/l and 230mg/l, respectively. the results of this study suggestthat the use of methanol and activated carbon to enhance the treatability efficiency of the uasb reactor is aviable option for the treatment of nssc pulping effluent.
منابع مشابه
Anaerobic Digestion of Pulping Wastewater Using Up-flow Anaerobic Sludge Blanket (UASB) Reactor at Mesophilic Condition
Corresponding Author: Randa M. Osman Chemical Engineering and Pilot Plant Department, National Research Centre, Cairo, Egypt Email: [email protected] Abstract: The waste considered for this study was the effluent of the pulping process produced during the manufacture of pulp and paper in the Rakta integrated pulp and paper mill in Alexandria. The pulping process in Rakta mill is condu...
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عنوان ژورنال:
international journal of environmental researchناشر: university of tehran
ISSN 1735-6865
دوره 6
شماره 3 2012
کلمات کلیدی
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