ZHENG Xu-wen,CHEN Yong-xing,CHEN Zhen-guo,et al.Denitrification of Iron Oxide Red Wastewater with High Ammonia Nitrogen by Zeolite Sequencing Batch Reactor Combined with Anoxic Up-flow Sludge Blanket Reactor[J].China Water & Wastewater,2021,37(1 1):1-8.
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Denitrification of Iron Oxide Red Wastewater with High Ammonia Nitrogen by Zeolite Sequencing Batch Reactor Combined with Anoxic Up-flow Sludge Blanket Reactor

China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU] volume: 第37卷 Number: 1 1 Page: 1-8 Column: Date of publication: 2021-01-01
Author(s):
ZHENG Xu-wen1; CHEN Yong-xing1; CHEN Zhen-guo1; 2; 3; WANG Xiao-jun1; 3; WANG Yong-qing1; ZHOU Song-wei1; 3
(1. School of Environment and Energy， South China University of Technology， Guangzhou 510006，China； 2. School of Chemistry and Chemical Engineering， South China University of Technology，Guangzhou 510641， China； 3. Hua An Biotech Co. Ltd.， Foshan 528300， China)
Keywords:
iron oxide red wastewater; zeolite; sequencing batch reactor; stable nitritation; nitritation and denitrification
Abstract:
The combined process of zeolite sequencing batch reactor (ZSBR) and anoxic up-flow sludge blanket reactor (A-USB) was applied to treat iron oxide red wastewater with high ammonia nitrogen.The characteristics of stable nitritation of ZSBR as well as nitrogen removal performance of combined process were investigated.Results showed that based on inhibition on nitrite oxidation bacteria（NOB）by free ammonia (FA), ZSBR could successfully achieve stable and sufficient full nitritation of iron oxide red wastewater.when NH4+-N concentration in the influent was about 700 mg/L, the effluent NH4+-N in ZSBR could be lower than 30 mg/L, with nitrite accumulation rate（NAR）higher than 95% and a maximum average nitrite production rate（NPR）of 0.68 kg/(m3·d). The alkalinity produced by A-USB denitrification could be effectively utilized and the amount of NaHCO3 of ZSBR could be reduced by increasing the external reflux ratio. The denitrification was carried out with glucose as the external carbon source. After denitrification in A-USB, total nitrogen removal efficiency（NRE）could be maintained above 85% and the maximum total nitrogen removal loading rate could be up to 5.10 kg/(m3·d). It was demonstrated by high-throughput sequencing analysis that the relative abundance of AOB（Nitrosomonas） was 50.93% and no NOB was detected, while the total relative abundance ratio of Paracoccus, Comamonas and Pseudoxanthomonas mexicana with denitrification function was up to 7.05%, which further demonstrated the efficient and stable denitrification performance of the combined process.
Last Update: 2021-01-01