The Bogotá River is one of the most contaminated bodies of water in Colombia and in the world. It originates in Guacheneque Páramo (Villapinzón, Cundinamarca) in the centre of the country and runs 336 kilometres before joining the Magdalena River. Along its course, the river receives the sewage of approximately 20.9% of Columbia's population. The…

The Paso del Norte segment of the Rio Grande experiences two seasons per year; the (wet) irrigation season and the (dry) non-irrigation season. The goal of this study was to improve the understanding of occurrence and contribution of dissolved metals in this region during the non-irrigation season. The objectives of this study were to (1) evaluate…

The marine transport sector contributes significantly to air and water pollution, particularly in coastal areas. In the oceans, the threat to marine life comes in various forms, such as overexploitation and harvesting, dumping of waste, pollution, alien species, land reclamation, dredging, and global climate change. A congressional research report…

Important aspects in the operation of vacuum filters and several sludge conditioning variables are examined. A troubleshooting guide for problems of vacuum filters was also developed. (MR)

Our present sewage disposal systems are ecologically unsound because they risk transmitting diseases, waste water, cost too much, increase lake eutrophication, and build up sludge. Sewerless toilets are being developed which can solve these problems. (MR)

Regional and supraregional treatment centers have been developed in Switzerland to cope with the problem of systematic toxic waste disposal. The process employed at the Fairtec Turgi plant is described beginning with delivery and storage and proceeding through treatment, reprecipitation, decontaminating cyanide, filtering sludge and ion-exchanger…

In 1972, a water quality survey of the eastern end of Majuro Atoll, Marshall Islands was conducted to determine the water quality of selected lagoon and open ocean sites and provide guidance for the construction of a sewerage system. This study revealed that lagoon waters were moderately to severely contaminated. (BT)

An evaluation of the use of the parameters currently being used to design and operate the activated sludge process is presented. The advantages and disadvantages for the use of each parameter are discussed. (MR)

U.S. EPA is gearing up to investigate about 300 hazardous waste dump sites per year that could pose an imminent health hazard. Prosecutions are expected to result from the priority effort at investigating illegal hazardous waste disposal. (RE)

Most waste treatment techniques conceived to meet the 1977 standards can be separated into three distinct phases: primary, secondary and tertiary treatment. An examination of the four heaviest industrial water users, pulp and paper, steel, plating, and food processing, demonstrates these treatments use proven technology to meet specific…