Treatment of rainwater runoff in recovery and recycling companies: Lab and pilot-scale testing

Wastewater released from the storage and/or processing of recycling and materials recovery can be characterised as rainwater runoff. Recuperation and recycling companies are confronted with wastewater that has a very fluctuating flow rate and composition. The flow rate mainly depends on the amount o...

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Bibliographic Details
Published in:Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering Toxic/hazardous substances & environmental engineering, 2013-03, Vol.48 (4), p.446-452
Main Authors: Chys, M., Depuydt, V., Boeckaert, C., Van Hulle, S.W.H.
Format: Article
Language:English
Subjects:
(waste-) water treatment
activated carbon filtration
Coagulation
coagulation/flocculation
Filtration
Filtration - methods
Flocculating
Flocculation
Flow rate
Freshwater
Metals - analysis
Metals - isolation & purification
PCB
Physical chemistry
Pilot installations
Polychlorinated biphenyls
Polychlorinated Biphenyls - isolation & purification
Polycyclic aromatic hydrocarbons
Polycyclic Aromatic Hydrocarbons - isolation & purification
Rain
rainwater
Recycling
Recycling centers
Runoff
Sand
sand filtration
waste recycling
Waste water
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - isolation & purification
Water Purification - methods
water reuse
Water treatment
Wood
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Summary:Wastewater released from the storage and/or processing of recycling and materials recovery can be characterised as rainwater runoff. Recuperation and recycling companies are confronted with wastewater that has a very fluctuating flow rate and composition. The flow rate mainly depends on the amount of rainfall while the composition additionally depends on what is currently stored on site. An analysis of possible physical-chemical treatment (coagulation/flocculation, sand filtration, activated carbon filtration and sedimentation) methods was performed at two different recycling companies in order to find a robust and economical feasible water treatment system that meets the discharge limits at all times. A violation of some measurement values (Cd, Cr, Ni and acenaphthene) after coagulation/flocculation occurred, which could be further reduced by using sand filtration. Good removal is achieved for common parameters as for mono- and poly-aromatic hydrocarbons (MAH and PAH) and polychlorinated biphenyls (PCB). Applying a coupled sand- and activated carbon filtration on runoff resulted in a removal of over 80% of several measurement values (suspended solids, heavy metals). This clearly indicates the applicability of the physical-chemical treatment techniques.
ISSN:1093-4529
1532-4117
DOI:10.1080/10934529.2013.729912