Antibiotics are widely used in human and veterinary medicine for the prevention and treatment of bacterial infectious diseases. An important but often disregarded aspect of antibiotic use is the fate of antibiotic residues entering the environment.1 Pharmaceutical industry wastewater, improperly-disposed of unused antibiotics, and non-metabolized antibiotics excreted by humans can all enter the sewer system in low concentrations.
November 1, 2006By Ratana Kanluen, MSc., Sultan Amer, Ph.D.
A new treatment successfully removes arsenic, selenium, and mercury from a variety of waste streams
Arsenic, selenium, and mercury occur widely in nature, though at low levels, and are associated with sulfide ores, elemental sulfur, and in crude oil and coal deposits. These metals are used in the manufacture of numerous industrial products, such as semiconductors, fuel cells, photographic processes, agricultural products, preservatives and pharmaceuticals, to name just a few.
Municipalities, industries find flexibility with mobile providers
Communities expect safe drinking water and clean water to do business. Water treatment plants are designed to provide that commodity but unforeseen situations often arise.
An established technology is helping remove harmful nutrients from municipal wastewater
As total maximum daily loads (TMDLs) for nutrient discharges have been developed and further revised by federal and state agencies over the years to address water quality concerns, deep-bed denitrification filters have proven to be a highly effective treatment technology used by wastewater plants to meet low total nitrogen (TN) limits. Patented in 1979, the technology of combining denitrification and solids removal in a deep-bed filter process has helped to dramatically improve wastewater quality at treatment plants across the country.