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CURRENT ISSUEMINERVA BIOTECNOLOGICA

A Journal on Biotechnology and Molecular Biology


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Minerva Biotecnologica 2001 June;13(2):123-34

BIOREMEDIATION - Part II 

Constructed wet­lands for ­water treat­ment

Langergraber G., Haberl R.

IWGA-SIG University for Agricultural Sciences Vienna, Vienna, Austria

This ­paper ­gives an intro­duc­tion to con­struct­ed wet­land tech­nol­o­gy. The ­term con­struct­ed wet­land as ­used in ­this ­paper ­describes an arti­fi­cial wet­land ­designed to ­improve ­water qual­ity. Constructed wet­lands pro­vide the opti­mal treat­ment con­di­tions ­found in nat­u­ral wet­lands but ­have the flex­ibil­ity of ­being con­struct­ed. The two ­main ­types of con­struct­ed wet­lands are ­described: sur­face ­flow and sub­sur­face ­flow con­struct­ed wet­lands (sub­sur­face ­flow con­struct­ed wet­lands are fur­ther sub­di­vid­ed ­into hor­i­zon­tal and ver­ti­cal ­flow con­struct­ed wet­lands). The remov­al mech­a­nisms for ­main con­stit­u­ents of waste­wa­ter (organ­ic mat­ter, nitro­gen, and phos­phor­us) and for addi­tion­al pol­lu­tants (­heavy met­als, spe­cial organ­ic com­pounds, and patho­gens) are dis­cussed as ­well as the ­role of ­plants in the treat­ment pro­cess. The treat­ment effi­cien­cy for ­heavy met­al remov­al ­with con­struct­ed wet­lands is ­shown as an exam­ple. A sim­u­la­tion ­tool for sub­sur­face ­flow con­struct­ed wet­lands is pre­sent­ed ­that is ­capable to mod­el the trans­for­ma­tion and elim­i­na­tion pro­cess­es for the ­main con­stit­u­ents of waste­wa­ter (organ­ic mat­ter, nitro­gen, and phos­phor­us). Simulation ­results for a ­pilot-­scale con­struct­ed wet­land for waste­wa­ter treat­ment are ­shown.

language: English


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