Cd. Martin et Kd. Johnson, THE USE OF EXTENDED AERATION AND IN-SERIES SURFACE-FLOW WETLANDS FOR LANDFILL LEACHATE TREATMENT, Water science and technology, 32(3), 1995, pp. 119-128
Citations number
13
Categorie Soggetti
Water Resources","Environmental Sciences","Engineering, Civil
Recently in the USA, the Solid Waste industry has undergone specific c
hanges in landfill regulations. The Federal Resource Conservation and
Recovery Acts (RCRA); and EPA subtitle D regulations, as well as strin
gent State regulations, impose minimum criteria for municipal solid wa
ste facilities in the areas of location, operation, groundwater monito
ring, and leachate management. In conjunction with these State and Fed
eral mandates the University of West Florida developed a leachate trea
tment technique utilizing extended aeration and surface-flow construct
ed wetlands. Sampling of water quality has occurred monthly since Febr
uary 1992. Parameters examined include: Nitrogen (NH3,), Total Suspend
ed Solids (TSS), Total Phosphate (TPO4), Total Organic Carbon (TOC), p
H, Alkalinity, and Chlorides. Chemical Oxygen Demand (GOD), Total and
Fecal Coliforms, Priority Pollutant Metals, and limited organic analyt
es are sampled on a less frequent basis. Samples are collected at a ra
w leachate site (L(0)), primary aerated lagoon (L(1)), and 6 stations
within the 1.1 hectare constructed wetland complex (S-1; W-1; W-3; W-5
; W-7; W-9) and one sandfilter (SF) location. Results thus far indicat
e removal percentages of the tested analytes average between 64% and 9
9%. This data suggests various physical, microbiological and chemical
processes occurring within the aerated lagoon and constructed wetlands
can provide an effective alternative to standard techniques for landf
ill leachate treatment and disposal. The methods as described have pro
ven to be ideal for the circumstances occurring at the Perdido Landfil
l.