Evaluation of nutrient removal performance and resource recovery potential of anaerobic/anoxic/aerobic membrane bioreactor with limited aeration

Lingyan Jiang; Yun Liu; Fanjin Guo; Zhen Zhou; Jie Jiang; Zhangchao You; Qiaoying Wang; Zhiwei Wang; Zhichao Wu

doi:10.1016/j.biortech.2021.125728

Evaluation of nutrient removal performance and resource recovery potential of anaerobic/anoxic/aerobic membrane bioreactor with limited aeration

Bioresour Technol. 2021 Nov:340:125728. doi: 10.1016/j.biortech.2021.125728. Epub 2021 Aug 8.

Authors

Lingyan Jiang¹, Yun Liu², Fanjin Guo³, Zhen Zhou⁴, Jie Jiang⁴, Zhangchao You², Qiaoying Wang⁵, Zhiwei Wang², Zhichao Wu²

Affiliations

¹ Tongji University, Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shanghai 200092, China; Shanghai Chengtou Water (Group) Co., Ltd, Shanghai 200002, China.
² Tongji University, Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shanghai 200092, China.
³ Xiamen Urban Planning and Design Institute, Xiamen 361001, China.
⁴ Shanghai Engineering Research Center of Energy - Saving in Heat Exchange Systems, Shanghai University of Electric Power, Shanghai 200090, China.
⁵ Tongji University, Shanghai Institute of Pollution Control and Ecological Security, State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shanghai 200092, China. Electronic address: [email protected].

PMID: 34385130
DOI: 10.1016/j.biortech.2021.125728

Abstract

This study proposes a novel strategy to obtain high-efficiency synchronous removal of nitrogen and phosphorus from wastewater by the limited-aeration anaerobic/anoxic/aerobic membrane bioreactor (AAO-MBR) and evaluates its resource recovery potential. Effects of membrane flux on pollutants removal and membrane fouling were investigated, and the optimal flux of 30 L/(m²·h) was obtained with efficient nitrogen and phosphorus removal of 81.5 ± 6.1% and 96.7 ± 2.1%. Compared with traditional and chemical-aided AAO-MBRs, limited-aeration AAO-MBR also alleviated membrane fouling by enlarging sludge flocs, improved sludge activities, and enriched the functional bacteria and genes. The sludge denitrification activity and phosphorus uptake activity of the limited-aeration AAO-MBR were 1.7 and 4.2 times as those of the traditional AAO-MBR. Low-temperature sludge pyrolysis results showed that sludge from limited-aeration AAO-MBR had higher nutrient storage and release capacity. This study proved the efficient nutrient removal capacity and high resource recovery potential of the limited-aeration AAO-MBR process.

Keywords: Limited-aeration AAO-MBR; Microbial communities; Phosphorus removal; Resource recovery potential; Simultaneous nitrification and denitrification.

MeSH terms

Anaerobiosis
Bioreactors*
Nutrients
Sewage
Waste Disposal, Fluid*

Substances

Sewage