Ferric phosphate (FePO4) sludge is routinely generated in wastewater treatment by addition of ferric chloride to remove phosphates and precipitate suspended solids. After the addition of sulfide to the FePO4 sludge, insoluble FeS particles are generated, leaving behind a phosphate-rich liquid, which can potentially be used as fertilizer. Electrochemical oxidation of FeS can lead to recovery of ...

For intensive production systems like the Blue Ridge Aquaculture (BRA), based in Martinsville, VA, there are significant economic incentives to reuse the waste by diverting it into a cropping system that would increase the total productivity and total resource-reuse efficiency, and decrease the environmental, ecological, and financial costs of aquacultural waste disposal. In order to facilitate...

This article provides a brief overview of current methods for the treatment and disposal sewage sludge, such as soil application, landfill, incineration anaerobic digestion. Municipal sludge is an acute problem in both developed developing countries. Researchers are conducting many experiments to solve this problem. They disposal, neutralization or reuse sediments after neutralization. The revi...

This study examined a novel reuse of alum sludge, an inescapable by-product of drinking water treatment process when aluminium salt is added as a coagulant, as the main medium in a laboratory-scale multi-stage constructed wetland (CW) system for reject water treatment. Such reject water is a main concern in municipal wastewater treatment plant (MWWTP) for increasing the organic and nutrient loa...

most of the water treatment plants in iran discharge their sludge to the environment whithout consideration of possible side effects. since this kind of sludge is generally considered pollutant, the sludge treatment of water industry seems to be an essential task. obviously theweight and volume of solids produced during the coagulation process are much more than other wastes of water treatment ...

The lightweight aggregates used by the civil engineering market are sintered at a high temperature, about 1200 °C. In times of high energy prices and regulation of carbon dioxide emissions, lightweight aggregate products of the high-temperature process in sales marketing are not readily accepted. This study developed a sintered-type paper sludge lightweight aggregate. In order to reduce energy ...

Membrane Bioreactor (MBR) process consists of a biological reactor integrated with membranes that combine clarification and filtration of an activated sludge process into a simplified, single step process. The membrane is an absolute barrier to suspended matter and microorganisms and it offers the possibility of operating the system at high mixed liquor suspended solids (MLSS) concentration. Th...