Waste activated sludges

Waste activated sludge Waste biomass Waste-derived fuels Waste disposal Waste-heat boiler... 

Another technique is one in which the sludge is passed in a thin sheet over a porous drainage belt. This technique is particularly appHcable to waste-activated sludge. 

In dissolved air flotation, air bubbles float the sludge, which is then removed by a scraper. It is generally appHcable to large volumes of waste-activated sludge. 

Soft solids, most of which are biological waste such as sewage, are difficult to convey up the beach. Annular baffles or dams have been commonly used to provide a pool-level difference wherein the pool is deeper upstream of the baffle toward the clarifier and lower downstream of the baffle toward the beach. The pool-level difference across the baffle, together with the differential speed, provide the driving force to convey the compressible sludge up the beach. This has been used effectively in thickening of waste-activated sludge and in some cases of fine clay with dilatant characteristics. 

Detention Time Waste activated sludge only, after sludge thickening. 10 -15 days volumetric displacement time. If sludge temperatures are much less than 60°F, more capacity should be provided. Primary sludge mixed with waste activated or trickling filter humus. 20 days displacement time in moderate climates. 

WAS Waste activated sludge, mg/L. The excess growth of microorganisms which must be removed from the process to keep the biological system in balance. Wastewater The used water and solids from a community that flow to a treatment plant. Storm water, surface water, and groundwater infiltration also may be included in the wastewater that enters a wastewater treatment plant. The term "sewage" usually refers to household wastes, but this word is being replaced by the term "wastewater". 

Hickey, R.F., Vanderwilen, J., and Switzenbaum, M.S., The effects of organic toxicants on methane production and hydrogen gas levels during the anaerobic digestion of the waste activated sludge, Water Res., 21, 1417-1427, 1987. 

Yamada Y, Kawase Y (2006) Aerobic composting of waste activated sludge kinetic analysis for microbiological reaction and oxygen consumption. Waste Manage 26 49-61... 

The recovery of alcohol by distillation, concentration of organics, and use of waste activated sludge as a soil conditioner and fertilizer has also been reported [35]. 

Figure 10 Refinery schematic diagram indicating representative sources of solid waste in wastewater treatment system. All wastes except waste activated sludge are classified as hazardous wastes because of their oil contents. (From Ref. 18.)...

The TS content was determined in waste activated sludge using microwave digestion followed by ICP-AES153 and by vacuum combustion extraction-quadrupole mass spectrometry (VCE-QMS).154 TS was determined in landfill gases by oxidative combustion followed by detection of the resulting S02 with a quartz piezoelectric crystal microbalance (QCM).155... 

Dewil, R., J. Baeyens, and R. Goutvrind. 2006. Ultrasonic treatment of waste activated sludge. Environ. Progress 25 121-128. 

The main advantages of MBR over waste activated sludge processes are ... 

DESIGN A GRAVITY THICKENER FOR COMBINED PRIMARY AND WASTE-ACTIVATED SLUDGE 16.46... 

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