Nitrogen removal in constructed wetlands treating nitrified meat processing effluent

摘要: The effect of plant and influent organic matter on nitrogen removal was investigated in four experimental surface-flow wetlands treating a nitrified meat processing effluent. Three contained floating mat the Glyceria maxima (and associated decaying litter). fourth simulated constructed nylon fabric. or 50% effluent recycle irrigated over two plant-containing wetlands, while other one with recycle) received at end as per normal practice. Nitrogen planted during final year study about twice that wetland without plants, averaged 46-49% (5.2-5.5 g N m −2 d −1 ) high average loading rate 11.2 . Summertime reached 75% (approx. 9.5 ). About 87% removed by due to denitrification, 13% accumulation sediment biomass. plants (including litter) were each responsible for removal, mainly through supplying carbon creating anaerobic conditions denitrification. Irrigation wastewater did not enhance removal.