کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1056839 | 1485311 | 2012 | 10 صفحه PDF | دانلود رایگان |
Although simultaneous denitrification-anaerobic digestion has been studied extensively, the use of salmon effluents as organic matter source has received little attention. This study evaluated the effect of C/N ratio, nitrate concentration, and organic load rate (OLR) on simultaneous nitrate and organic matter removal using salmon effluents. The study was carried out in a batch reactor with suspended biomass at 37 °C and pH 7.5, and in continuous biofilm tubular reactors at 37 °C fed with a mixture of a synthetic substrate and a saline protein-rich salmon-plant effluent. The results of the batch and continuous experiments showed that nitrate abatement was greater than 95% at all the studied C/N ratios, without effect of the C/N ratio on NO3−–N transformation and ammonia production. An increase of nitrate concentration increased organic matter consumption as well as the hydrolytic rate. The organic matter reduction varied between 88% and 40% in the continuous process. For a continuous process, the increase of the OLR decreases the removal of organic matter.
► Simultaneous denitrification/anaerobic digestion of salmon effluents was studied.
► The influence of C/N ratio and OLR on process efficiency was evaluated.
► The C/N ratio has no effect on nitrate transformation.
► Increasing the OLR reduced the removal of organic matter.
Journal: Journal of Environmental Management - Volume 101, 30 June 2012, Pages 82–91