Efficiency of active barriers attaching biofilm as sediment capping to eliminatethe internal nitrogen in eutrophic lake and canal
Tinglin Huang , Jinlan Xu , Daojian Cai
DOI:
Received July 01, 2010,Revised October 25, 2010, Accepted , Available online
Volume 23,2011,Pages 738-743
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Three active barrier materials (zeolite, ceramicite and light porous media) were applied for preventing nitrogen (N) release from
eutrophic lake sediments. Long term experiment of two di erent lake sediments were carried out and the e ect of zeolite dose was
evaluated. The results indicated that about 90%–100% of total N in overlying water was eliminated by using zeolite. While the N
removal e ciency by ceramic was lower than that by zeolite, and light porous media present the lowest e ciency of 59%. Long term
sediment incubation experiments indicated that two eutrophic sediments were both e ective in preventing N release in spite of di erent
release characteristics. Bio-zeolite capping technology was able to e ectively inhibit the release of N from the sediment, and the zeolite
dose was independently from N removal.
