Abstract
In this study, the optimization of nitrate removal from wastewater with a low C/N ratio using solid-phase denitrification was investigated. Biodegradable polymer, an attractive alternative to liquid carbon sources for biological denitrification, was used as a carbon source and biofilm support for nitrate removal. An experiment was conducted based on a central composite design (CCD) with response surface methodology (RSM). A secondary polynomial regression with nitrate removal efficiency as response value was developed. Based on statistical analysis, the nitrate removal model was highly significant with very low probability values (<0.0001). At the optimal conditions for nitrate removal (hydraulic retention time (HRT), 3.5 h; influent NO3 (-)-N concentration, 14.73 mg/L; and influent CODCr concentration, 15.00 mg/L), the nitrate removal efficiency was 99.23 %. The results of an ANOVA and response surface analysis showed that HRT, influent NO3 (-)-N concentration, influent CODCr concentration, and the interaction between the HRT and influent CODCr concentration significantly affected the nitrate removal efficiency (P < 0.05). In solid-phase denitrification process, electron donor for denitrification could be obtained by biologica...Continue Reading
References
Mar 26, 2003·Applied Microbiology and Biotechnology·A Hiraishi, S T Khan
Apr 2, 2008·Bioprocess and Biosystems Engineering·Andrea HilleHarald Horn
Aug 12, 2008·Bioresource Technology·Mary Ann Robinson-Lora, Rachel A Brennan
Jul 31, 2009·Water Research·Evelyn WaltersHarald Horn
Feb 4, 2010·Journal of Hazardous Materials·Cristina TroisLaurent Oxarango
Jan 5, 2011·Bioresource Technology·P J StrongD J Gapes
Jan 29, 2011·Chemosphere·Libing Chu, Jianlong Wang
Mar 23, 2011·Journal of Hazardous Materials·Shuokr Qarani AzizMohammed J K Bashir
Jul 22, 2011·Bioresource Technology·Zhiqiang Shen, Jianlong Wang
May 5, 2012·Applied Microbiology and Biotechnology·Weizhong WuJianlong Wang
May 9, 2012·Environmental Science and Pollution Research International·Weizhong WuJianlong Wang
Jun 19, 2012·Bioresource Technology·Weizhong WuLuhua Yang
Jul 24, 2012·Bioresource Technology·Zhaoqian JingYuyu Liu
Mar 19, 2013·Journal of Hazardous Materials·Zhiqiang ShenJianlong Wang
Jul 30, 2014·Bioresource Technology·Zhongming LiYongzhen Peng
Citations
Feb 20, 2018·Environmental Science and Pollution Research International·Mozafar AnsariAhmed El-Shafie
May 24, 2017·Biodegradation·Yi LuJun Mu
May 22, 2020·The Science of the Total Environment·Qiushi ShenLi Kuang
Mar 23, 2021·World Journal of Microbiology & Biotechnology·Roshni J PatelAnuradha S Nerurkar
Apr 12, 2021·The Science of the Total Environment·Feifan ZhangShiyang Li