Factor-Cost Relationships for Sludge Recycling Through Land Disposal

Composite Recycling and Disposal

Aeronautic/aerospace applications, both military and commercial, are accounting for a large share of the growing composite market in value. However, their share of the market in volume is much smaller. Costs are high when large amounts of carbon fiber reinforcements are used. These high performance composite materials have six properties that give them an edge over traditional materials: longer...

Elimination of Daf Sludge Disposal through Resource Recovery

A common approach to wastewater pretreatment in the food industry is the utilization of dissolved air flotation @AF) cells. DAF units are common for BOD, TSS, and FOG reduction when wastewater is discharged to a municipal wastewater treatment plant. A growing problem for all DAF systems is that of sludge disposal. In the o p t i o n of a DAF, contaminants are removed in the form of a concentrat...

Sediment Recycling: Marsh Renourishment Through Dredged Material Disposal

Sewage Sludge Disposal in Switzerland

Sewage sludge was used as fertilizer in agriculture in Switzerland since the begin ning of modern waste water treatment. During the last 40 years several difficulties arose with the agricultural use. The problems with pathogenic germs could be solved with a prepasteurisation. The contamination with heavy metals was reduced during the years but remained a cause for concern. The fear of mad cow d...

Recycling Zinc Phosphate Sludge

he cost of sludge disposal can contribute significantly to the cost of product manufacturing. An opportunity exists to eliminate this cost of land disposal of sludge resulting from the zinc phosphate pretreatment process. In addition, the cost of the phosphating process may be reduced by reclaiming this sludge to a zinc-phosphate replenishment solution and other useful products. For those not f...