NDLI: Efficient biological nitrogen removal by Johannesburg-Sulfur autotrophic denitrification from low COD/TN ratio municipal wastewater at low temperature

Content Provider	Springer Nature Link
Author	Li, Haibo Zhou, Beihai Tian, Zhiyong Song, Yonghui Xiang, Liancheng Wang, Siyu Sun, Chen
Copyright Year	2015
Abstract	A novel system integrating Johannesburg (JHB) and sulfur autotrophic denitrification (SAD) process was proposed to enhance nitrogen removal in treating low COD/TN ratio (COD 129 mg/L, TN 29 mg/L on average) municipal wastewater at low temperature (12.2 ± 0.5 °C). The results showed that under an HRT of 11.3 h, the JHB process effluent COD, TN, and NH $$ _{4}^{ + } $$ –N were 32, 13.8, and 1.6 mg/L on average, respectively. Since NO $$ _{3}^{ - } $$ –N was the prominent compound of TN (average 80.6 %) and COD was low in JHB effluent, the SAD process utilized sulfur granule as electron donor for autotrophic denitrification was employed to remove the rest NO $$ _{3}^{ - } $$ –N of the JHB process. In JHB-SAD system, heterotrophic denitrification cooperated with autotrophic denitrification to enhance nitrogen removal. It was found that 87.0 % JHB effluent nitrogen was removed by SAD process under the most efficient nominal hydraulic retention time (HRT) of 0.32 h. The SAD process effluent of COD, TN, and NH $$ _{4}^{ + } $$ –N were 21, 1.8, and 1.0 mg/L, respectively. Most importantly, the JHB-SAD system could achieve complete nitrogen removal theoretically as long as the NH $$ _{4}^{ + } $$ –N was sufficiently oxidized. The nitrogen removal performance of JHB-SAD system is attractive in treating low COD/TN ratio municipal wastewater at low temperature. Moreover, SAD process was well adapted for limited space because of the efficient NO $$ _{3}^{ - } $$ –N removal, which was propitious to upgrade wastewater treatment plant.
Starting Page	5027
Ending Page	5035
Page Count	9
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	73
Issue Number	9
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-03-15
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Johannesburg process Sulfur autotrophic denitrification process Low COD/TN ratio Efficient nitrogen removal Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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