Mixing zone regulation for effluent discharges into EU waters

Pharmaceuticals in Wastewater Treatment Plant Effluent Waters

Pharmaceuticals are being used at an increasing rate, and end up in wastewater through excretion and disposal. They also end up in the effluent water of wastewater treatment plants because they are not specifically designed for pharmaceutical removal. Several studies suggest diverse negative effects on aquatic life that are exposed to these trace amounts of pharmaceuticals in their habitats. Th...

Mixing Precipitation of CaCO3 in Natural Waters

The mixing precipitation of CaCO3 in natural waters was theoretically studied by the methods of chemical equilibrium calculation. Results show that mixing precipitation of CaCO3 can be produced by mixing between two unsaturated water samples with respect to CaCO3, two oversaturated water samples, an unsaturated water sample and an oversaturated water sample. Mixing precipitation can be classifi...

Visual Plumes mixing zone modeling software

The US Environmental Protection Agency has a history of developing plume models and providing technical assistance. The Visual Plumes model (VP) is a recent addition to the public-domain models available on the EPA Center for Exposure Assessment Modeling (CEAM) web page. The Windows-based VP adapts, modifies, and enhances the earlier DOS-based PLUMES with a new interface, models, and capabiliti...

Waves and Mixing in the Coastal Zone

As part of our project entitled Wind, Waves, and Mixing in the Coastal Region (AO3-379) some measurements of waves and current profiles were performed in our study site. In the Pacific coast of Baja California, a wave and current sensor, a marine radar and a meteorological station have been in operation since mid 1998. Additionaly, a current meter profiler (adp) was installed for some days in e...

Marginal Waters for Agriculture – Characteristics and Suitability Analysis of Treated Paper Mill Effluent