In view of the well recognized need of reject water treatment in MWWTP (municipal wastewater treatment plant), this paper outlines two strategies for P removal from reject water using alum sludge, which is produced as by-product in drinking water treatment plant when aluminium sulphate is used for flocculating raw waters. One strategy is the use of the alum sludge in liquid form for co-conditio...

© MCB University Press [ISSN 0956-6163] The authors wish to express their deep gratitude and appreciation to the Deutscher Akademischer Austauschdienst for the fellowship that was granted to Dr Abdel-Shafy throughout this study. The authors also are in great debt to the scientific co-operation of both Dipl.-Ing. N. Peschen and Dipl.-Ing. K.S. Iter, Forschungsinstitut der Forschungsgemeinschaft ...

In recent years, increasing attention has been paid to the problem of sewage sludge management and relevant energy consumption, which represent main cost items in wastewater treatment plants. Therefore, implementation technologies that can reduce production ensure a positive impact on entire plant gained considerable importance scientific technical community. The objective this study was thus s...

Thousands of high production volume (HPV) chemicals are used in the US at rates exceeding 450,000 kg (1 million pounds) per year, yet little is known about their fates during wastewater treatment and upon release into the environment. We utilized a recently introduced empirical model to predict the fraction of the mass loading (in raw sewage) that is expected to persist in digested sludge follo...

In Saudi Arabia, the Riyadh Sewage Treatment Plant (RSTP) uses the activated sludge technology as the secondary treatment process for sewage. Due to the complex nature of the process, a rather simplified, yet practical, steady state model that captures the most important features of the RSTP was developed. Actual operating and design conditions were obtained from RSTP data bank. The monthly ave...