Articles tagged with Sludge
A new metagenomic study of activated sludge wastewater treatment processes reveals key players and mechanisms behind the process. The researchers were able to obtain a nearly complete genetic blueprint for Accumulibacter phosphatis, a bacterial species essential for removing excess phosphorus from wastewater.
The Nereda TM purification method uses oxygen-using bacterial granules to purify water, offering advantages over conventional processes in terms of space and energy requirements. This technology has been nominated for the Dutch Process Innovation Award and is currently being tested on a larger scale.
Researchers found that triclocarban, used in antiseptic soap, persists in sludge and is concentrated several thousand-fold higher than in raw wastewater. The chemical's polychlorinated structure makes it resistant to degradation during wastewater treatment.
Korean researchers explore reusing sewage sludge in cement kiln processes, offering a potential solution for reducing organic components' negative impact on the environment. The study's findings focus on mitigating the obstacles associated with high P2O5 and Cl content in sewage sludge, paving the way for its effective utilization.
A new water treatment process called activated magnetic sludge process has been introduced, which uses magnetic separation to reduce excess sludge production. The technique can treat up to 21 gallons of sewage daily without generating any excess sludge.
Researchers found liquid sewage sludge to be just as effective as traditional synthetic fertilizers in improving crop yields and nutrient content. The study also showed low levels of heavy metals in crops, groundwater, and soil, making it a promising environmentally safe alternative for waste disposal.
A study published in BMC Public Health found a link between sewage sludge use and Staphylococcus aureus infections, affecting 25% of surveyed residents. The US EPA was criticized for not considering the combined risks of pathogens and chemicals in treated fields.
A portable wastewater treatment unit has been developed to treat wastewater in remote locations, using stainless steel screens and pressure filters with clay beads. The unit can treat 30,000 gallons per day of wastewater, producing partially dried sludge that can be disposed of with regular solid waste.
A nonradioactive substitute for 'screamingly radioactive' storage tanks has been developed to aid in nuclear waste clean-up, potentially saving hundreds of millions of dollars. The synthetic sludge mimics the deadly sludge found in underground nuclear waste storage tanks and can be handled safely by lab workers.
Researchers from Columbia University's Lamont-Doherty Earth Observatory measured zinc in rivers downstream from a Spanish zinc mine's collapse, finding amounts comparable to the mine's annual output, causing environmental concerns about crop losses and fish populations.