uv/h2o2/tio2/zeolite hybrid system for treatment of molasses wastewater
نویسندگان
چکیده
wastewater from molasses processing contains a large amount of coloured substances that give a recalcitrant dark brown colour and high organic load to the effluent. photocatalytic decolourization of molasses wastewater was performed using titanium dioxide catalyst coated on the surface of south african natural zeolite using the solid-solid dispersion method. addition of hydrogen peroxide as an oxidant was investigated and 30w uv-clamp was used as source of irradiation. the chemical oxygen demand (cod) of the wastewater treated was varied from 20 g/l to 1 g/l. batch experiments were conducted in a thermostatic shaker fitted with the uv lamp. the effects of ph, catalyst loading, oxidant dosage and irradiation time on the cod reduction and decolourization of the molasses waste water (mww) were investigated in this study. the highest colour removal of more than 90% was achieved at ph = 4 and oxidant dosage of 1.47 mm, while low cod removal (< 20%) was observed during photodegradation. a h2o2/uv/tio2 system achieved higher colour removal of 97% compared to a uv/tio2 system which achieved 44% while h2o2/uv system achieved 34% colour removal. the rate of decolourization was found to fitpseudo - first order reaction kinetics with the highest rate constant value of 1.36 x 10-2 min-1.
منابع مشابه
UV/H2O2/TiO2/Zeolite Hybrid System for Treatment of Molasses Wastewater
Wastewater from molasses processing contains a large amount of coloured substances that give a recalcitrant dark brown colour and high organic load to the effluent. Photocatalytic decolourization of molasses wastewater was performed using titanium dioxide catalyst coated on the surface of South African natural zeolite using the solid-solid dispersion method. Addition of hydrogen peroxide as...
متن کاملA Hybrid Constructed Wetland System for Decentralized Wastewater Treatment
Constructed wetland technology has been widely applied around the world to treat domestic wastewaters from the single family home to small communities. Constructed wetlands can be classified as either surface flow wetlands (similar to natural wetlands) or subsurface flow wetlands, where the wastewater flows through a media. Subsurface flow constructed wetlands can either be horizontal flow syst...
متن کاملperformance and microbial community analysis of a full-scale hybrid anaerobic–aerobic membrane system for treating molasses-based bioethanol wastewater
we evaluated the efficacy of a full-scale combined biophysicochemical system for treatingmolasses-based bioethanol wastewater in terms of organic substances, nutrient, and dark brown color removal. the main organic removal unit, i.e., the upflow anaerobic sludge blanket (uasb) reactor, achieved 80.7% removal and 4.3 nm3 methane production per cubic meter of wastewater with a hydraulic retention...
متن کاملperformance and microbial community analysis of a full-scale hybrid anaerobic–aerobic membrane system for treating molasses-based bioethanol wastewater
we evaluated the efficacy of a full-scale combined biophysicochemical system for treatingmolasses-based bioethanol wastewater in terms of organic substances, nutrient, and dark brown color removal. the main organic removal unit, i.e., the upflow anaerobic sludge blanket (uasb) reactor, achieved 80.7% removal and 4.3 nm3 methane production per cubic meter of wastewater with a hydraulic retention...
متن کاملTreatment of saline municipal wastewater using hybrid growth system
BACKGROUND In this study, a hybrid treatment system (Fluidized Bed positioned in a biological reactor of an Activated Sludge process) was used to treat saline domestic wastewater. The performance of the mentioned hybrid system was compared with the conventional activated sludge. A pilot study was conducted, and Chemical Oxygen Demand (COD), Electrical Conductivity (EC), Total Dissolved Solids (...
متن کاملImprovement of Nanosized CuO-Fe2O3/cordierite System by Li2O-treatment for wastewater treatment
A mixture of 10 wt% CuO-10 wt% Fe2O3 supported on cordierite were prepared by wet impregnation. The as-prepared solids doped with Li2O (0.75-3 mol %) were calcined at 500-900 ºC. The crystalline phase, morphology, and surface area were investigated by XRD, HR-TEM and N2-adsoprtion-desorption. Moreover, their photocatalytic activities of samples calcined at 700°C on the degradation of phenol wer...
متن کاملمنابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
iranian journal of chemistry and chemical engineering (ijcce)ناشر: iranian institute of research and development in chemical industries (irdci)-acecr
ISSN 1021-9986
دوره 33
شماره 2 2014
کلمات کلیدی
میزبانی شده توسط پلتفرم ابری doprax.com
copyright © 2015-2023