background textile dyes are the largest organic compounds associated with some problems for the environment. advanced oxidation process is the most effective method for dye removal from wastewater. objectives the aim of this study was to investigate the efficiency of the photo fenton process for decolorization of direct red 81 (dr 81) dye, and to determine the optimal process conditions. method...

Concentrated HIV epidemics have already occurred in IDUs in the neighbouring India, Myanmar and Nepal (WHO, Regional Office South-East Asia, 2008). Due to porous borders with India and Myanmar and central geographical situation between ‘Golden Triangle’(Myanmar, Thailand and Laos) and ‘Golden Crescent’ (Pakistan, Afghanistan and Iran), Bangladesh is a potential route of international drugs traf...

osa (oxic settling anoxic) process is one of the sludge reduction methods. in this method an anaerobic reactor is placed in activated sludge recycling line for sludge reduction purpose. this method is getting popular because of possibility of its application in currently operating waste water treatment plants. in this research, the performance of osa process in sludge reduction in sbr was impro...