A novel vertical dual-loop reactor for rapid start-up of simultaneous partial nitrification and anammox process in treating landfill leachate: Performances and mechanisms

Siqi Wang; Zedong Teng; Yun Li; Fuming Chen; Xu Liu; Shujie Liu; Juyuan He; Wei Wang

doi:10.1016/j.biortech.2022.127947

A novel vertical dual-loop reactor for rapid start-up of simultaneous partial nitrification and anammox process in treating landfill leachate: Performances and mechanisms

Bioresour Technol. 2022 Nov:364:127947. doi: 10.1016/j.biortech.2022.127947. Epub 2022 Sep 11.

Authors

Siqi Wang¹, Zedong Teng², Yun Li³, Fuming Chen⁴, Xu Liu⁴, Shujie Liu⁴, Juyuan He⁴, Wei Wang⁵

Affiliations

¹ Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China; Research Institute of Tsinghua University in Shenzhen, Shenzhen 518057, China; School of Environment, Tsinghua University, Beijing 100084, China.
² Innovation Academy for Green Manufacture, Key Laboratory of Green Process and Engineering, Beijing Engineering Research Centre of Process Pollution Control, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
³ Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China. Electronic address: daisyliy10@163.com.
⁴ Qingyan Environmental Technology Co. Ltd, Shenzhen 518057, China.
⁵ School of Environment, Tsinghua University, Beijing 100084, China.

PMID: 36100189
DOI: 10.1016/j.biortech.2022.127947

Abstract

A novel vertical dual-loop reactor (VDLR) was developed to start and conduct a single-stage partial nitritation (PN) and anammox (PN/A) process for treating landfill leachate. Results showed that the total nitrogen (TN) removal reached 1.54 kg N/m³·d in the VDLR. It exhibited excellent mixing uniformity and buffer performance, which can increase the nitrogen removal performance up to 42.1 % via the improvement of anammox granular sludge activity (a particle size of 0.5-1 mm). Mass balance and microbial analysis indicated that the VDLR achieved efficient TN removal via anammox (99.24 %) and AOB (Nitrosomonas and Ellin6067) and anAOB (Candidatus kuenenia) played a vital role in this process.

Keywords: Anammox; Partial nitrification; Rapid start-up; Vertical dual-loop reactor.