EurekaMag.com logo
+ Site Statistics
References:
53,214,146
Abstracts:
29,074,682
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

The roles of nitrogen dissimilation and assimilation in biological nitrogen removal treating low, mid, and high strength wastewater



The roles of nitrogen dissimilation and assimilation in biological nitrogen removal treating low, mid, and high strength wastewater



Journal of Environmental Engineering and Science 6(5): 483-490



Nitrogen dissimilation (nitrification and denitrification) and assimilation (uptake by cell growth) under different operational conditions (chemical oxygen demand (COD) and dissolved oxygen (DO)) were evaluated in a sequencing batch reactor (SBR) system. Nitrogen dissimilation played an important role for nitrogen removal at low to mid CODs, while nitrogen assimilation became more significant with biomass concentration steadily increasing at high COD. Specific denitrification rate increased at low to mid COD (C:N < 15), but decreased at high COD (C:N > 20). Both COD and C:N ratio should be kept in proper ranges to obtain sufficient biomass concentration for nitrogen assimilation in treatment systems. With alkalinity being consumed in nitrification and produced-in denitrification, effluent alkalinity indicated the corresponding nitrogen concentrations under different COD loadings. Delta Alk between influent and effluent was also well correlated with assimilation and dissimilation. The discrepancy between Delta Alk(Theory) and AAlk(Experi) was less than 15 mg/L when dissimilation played a predominant role in nitrogen removal, while the discrepancy increased to 30 mg/L when assimilation became dominant.

(PDF same-day service: $19.90)

Accession: 017472885

Download citation: RISBibTeXText

DOI: 10.1139/s07-001



Related references

Organic carbon and nitrogen removal in anoxic/oxic-membrane bioreactor treating high-strength wastewater. Environmental Progress & Sustainable Energy 28(1): 155-161, 2009

Biological nitrogen removal of high-strength ammonium industrial wastewater with two-sludge system. Water Research 37(17): 4211-4221, 2003

Aerobic granules formation and simultaneous nitrogen and phosphorus removal treating high strength ammonia wastewater in sequencing batch reactor. Bioresource Technology 171: 211-216, 2015

Effect of influent COD/N ratio on biological nitrogen removal (BNR) from high-strength ammonium industrial wastewater. Process Biochemistry 39(12): 2035-2041, 2004

Nitrogen removal via nitrite in a partial nitrification sequencing batch biofilm reactor treating high strength ammonia wastewater and its greenhouse gas emission. Bioresource Technology 230: 49-55, 2017

Fate of carbon, nitrogen and phosphorus removal in a post-anoxic system treating low strength wastewater. International Biodeterioration & Biodegradation 108: 166-174, 2016

Acrylonitrile removal from synthetic wastewater and actual industrial wastewater with high strength nitrogen using a pure bacteria culture. Water Science and Technology 43(2): 349-354, 2001

Nitrogen removal performance and microbial community of an enhanced multistage A/O biofilm reactor treating low-strength domestic wastewater. Biodegradation, 2018

Evolution of N-converting bacteria during the start-up of anaerobic digestion coupled biological nitrogen removal pilot-scale bioreactors treating high-strength animal waste slurry. Bioresource Technology 100(14): 3678-3687, 2009

Effect of Ferrous Ion Coagulation on Biological Ammonium Nitrogen Removal in Treating Coke Wastewater. Environmental Engineering Science 26(12): 1739-1746, 2009

Organic and nitrogen removal in a two-stage rotating biological contactor treating municipal wastewater. Bioresource Technology 93(1): 91-98, 2004

Advanced nitrogen and phosphorus removal in A2O-BAF system treating low carbon-to-nitrogen ratio domestic wastewater. Frontiers of Environmental Science & Engineering in China 5(3): 474-480, 2011

Carbon and nitrogen removal from low-strength domestic wastewater with a two-stage submerged biological filter. Journal of Environmental Science and Health. Part A, Toxic/Hazardous Substances & Environmental Engineering 42(5): 641-647, 2007

Nitrogen removal via nitritation pathway for low-strength ammonium wastewater by adsorption, biological desorption and denitrification. Bioresource Technology 267: 541-549, 2018

Intensified nitrogen and phosphorus removal by embedding electrolysis in an anaerobic-anoxic-oxic reactor treating low carbon/nitrogen wastewater. Bioresource Technology, 2018