00000cab a22000003a 4500 UP-99796217611368245 Buklod 20231008001419.0 m |o d | ta 140814s xx d | ||r ||||| || DENGII eng Mena, Marino M. Combined treatment an economical alternative approach to stream pollution control Marino M. Mena; foreword by Ma. Antonia N. Tanchuling. pp. 1 One of the most pressing environmental problems facing many cities today is managing the water quality of rivers and waterways. Rapid industrial growth, steady increase in population, and weak enforcement of environmental regulations contribute to the poor quality of surface water. In the Philippines, only 36 percent of the rivers can be used as sources of potable water supply, according to the Philippines Environment Monitor I in 2003. The same study reported that the annual production of organic pollution amount to 2.2 million tons, which are being contributed mainly by domestic sewage (48 percent), industrial effluents (37 percent) and agricultural activities (15 percent). Water quality management schemes can be implemented at many stages of the pollution-producing process. Changes can be made regarding the raw materials being used in the case of manufacturing plants and reduction of volume of wastewater are some of the ways to manage water quality. Likewise, there are end of pipe solutions, or pollution control technologies that are being used to be able to reduce the amount of pollution load being dumped in receiving bodies of water. In the following article written by the late Professor and former College of Engineering Dean Marino M. Mena, the idea of treating industrial wastewater in sewage treatment plants is being broached as an economical alternative in managing pollution. He considers it beneficial for small industries who cannot afford the high capital costs of putting up its own wastewater plant. Although written more than a quarter of a century ago, the need to be able to come up with efficient pollution control technologies still holds true up to this day. The proposed scheme as discussed in the paper is not suitable for all types of industrial wastewater. In the paper, the example cited is that of textile wastewater being treated together with sewage. The feasibility of treating industrial wastewater in sewage treatment plants should consider issues on : uniformity of flow, composition of wastes, toxicity and scum forming characteristics of the wastewater. Combined treatment of sewage and industrial wastewater is not being practiced in the Philippines today. What we have in place are sewage treatment plants for some parts of Metro Manila and individual on-site treatment plants for industries, as mandated by law. Water treatment plant residuals Purification Philippines. Sewage Purification Philippines. Philippine Engineering Journal 31, 2( 2 copies) (2010(D)). Also available online for University of the Philippines Diliman. Click here https://journals.upd.edu.ph/index.php/pej/article/view/7951 (viewed 13 January 2022) FI UPD DENG-II Article