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waste management

Waste Management


Derwentside Environmental was one of the first laboratories to offer services to meet the landfill directive.  The directive's overall aim is "to prevent or reduce as far as possible negative effects on the environment, in particular the pollution of surface water, groundwater, soil and air, and on the global environment, including the greenhouse effect, as well as any resulting risk to human health, from the land-filling of waste, during the whole life-cycle of the landfill". 
Waste can be initially characterised, and then categorised to determine the type of landfill which can accept it. The corresponding Waste Acceptance Criteria requires waste to be categorised into three categories prior to landfill disposal.

 
Waste Characterisation


Prior to deciding how waste is consigned, it is important to characterise the waste, and DETS recommend a screening suite of tests designed to cover common contaminants:

• pH
• Moisture content
• Total sulphate
• Sulphide
• Phenols
• Total Cyanide
• Metals – As, Cd, Cr, Hg, Ni, Pb, Zn
• PAHs – speciated 16 by GCMS
• TPH banded

 

Waste Categorisation


This is the Waste Acceptance Criteria used to determine into which category (inert waste, stable non-reactive hazardous waste, & hazardous waste) it will be consigned, and utilises tests on both the solid waste, plus the BS EN 12457 two stage leaching test.

Solid waste


• TOC – total organic carbon
• LoI – loss on ignition
• BTEX – benzene, toluene, ethylbenzene and xylenes
• PCBs – polychlorinated biphenyls, seven congeners
• EPH – extractable petroleum hydrocarbons, C10 – C40
• pH
• ANC – acid neutralisation capacity at pH 4 and pH 7

Leachate


• Metals – As, Ba, Cd, Cr, Cu, Hg, Mo, Ni, Pb, Sb, Se, Zn
• Anions – Cl, F, SO4
• TDS – total dissolved solids
• Phenol – as phenol index
• DOC – Dissolved organic carbon

 

DETS – dependable data, dependable delivery