Evaluation of industrial organic waste as an alternative external carbon source for denitrification in the biological nutrient removal process

Effect of fermentation liquid from food waste as a carbon source for enhancing denitrification in wastewater treatment

“…According to this study, the denitrification potential P DN of the FLFW is 0.174 g N/g COD and the productivity of carbon source from the food waste is 0.096 g SCOD/g FW. In some cases, the effluent TN concentration could be as high as 15e20 mg/L due to low COD/TN ratio (Czerwionka et al, 2012;Lee et al, 2013). If a complete TN removal is supposed to be the target of external carbon source addition, it can be calculated that 0.9e1.2 kg FW would be needed for the production of FLFW for the treatment of per m 3 wastewater, which is equivalent to the food wastes generated by 2 or 3 persons (Zhang and Fu, 2010).…”

“…Consequently, various results have been reported regarding industrial wastewater and food industry effluent and their use as external carbon sources for denitrification due to their practical characteristics such as cleanliness (i.e., relatively free of metals and other contaminants), stability in terms of composition and content of readily biodegradable organic compounds, and availability in the required quantities on a consistent schedule. Several different organic mixtures have been tested under lab-scale conditions for denitrification performance, e.g., crude syrup and hydrolyzed starch, industrial wastewaters from the ice cream production industry and beet-sugar factories, dairy effluents and agro-food wastewater (Lee and Welander, 1996;Cappai et al, 2004;Sage et al, 2006;Rodriguez et al, 2007;Swinarski et al, 2009;Crzerwionka et al, 2012;Lee et al, 2013). The characteristics of the external carbon sources exhibited significant effects on the denitrification process such as denitrification rate, denitrification potential, COD demand and biomass yield (Lee and Welander, 1996;Fernandez et al, 2010).…”

Application of Internal Carbon Source from Sewage Sludge: A Vital Measure to Improve Nitrogen Removal Efficiency of Low C/N Wastewater

“…They explained that this was mainly because MCS would be served as an effective electron donor for denitrification by autotrophic denitrifiers during wastewater treatment. Lee et al [47] evaluated the feasibility of industrial organic wastes as the substitute external carbon source for denitrification in the biological nutrient removal process. The results showed that the denitrification ability of microorganisms resembled that of using methanol as an external carbon source.…”

Industrial Wastewater as a Source of External Organic Carbon for the Biological Nutrient Removal

“…12 The use of alternative C org sources such as concentrated wastewater from industries are an interesting option. 13,14 In any case, these wastewaters must be treated, and therefore their import to WWTPs, where they increase the efficiency of denitrification, will bring double benefits. The usability of wastewater from the agro-food industry (e.g., milk bottling industries, potato processing industries, wastewater from winery industries) is commonly reported 15 , however other industries also produce external organic substrates.…”