Heated Aeration for Nitrite-Oxidizing Bacteria (NOB) Control in Anammox-Integrated Membrane-Aerated Biofilm Reactors (MABR)

Environments Pub Date : 2024-07-19 DOI:10.3390/environments11070155

Natalia Shiu, Hui Guo, Younggy Kim

{"title":"Heated Aeration for Nitrite-Oxidizing Bacteria (NOB) Control in Anammox-Integrated Membrane-Aerated Biofilm Reactors (MABR)","authors":"Natalia Shiu, Hui Guo, Younggy Kim","doi":"10.3390/environments11070155","DOIUrl":null,"url":null,"abstract":"Nutrient removal in conventional wastewater treatment systems is expensive due to the high aeration costs. An alternative method for effective and sustainable nitrogen removal in wastewater treatment is anaerobic ammonium oxidation (Anammox) implemented with other innovative technologies, such as membrane-aerated biofilm reactors (MABRs). A major challenge associated with the Anammox process is effective control of nitrite-oxidizing bacteria (NOB). High temperature operation in wastewater treatment systems can promote Anammox bacterial growth and inhibit NOB activity. This research aims to investigate the feasibility of integrating Anammox processes with a lab-scale MABR and to examine the effects of high temperature aeration supplied to MABR systems on Anammox bacterial growth and NOB suppression. Experimental results indicate that the membrane’s air permeability was a critical parameter for the successful operation of Anammox-integrated MABR systems due to its influence on the system’s dissolved oxygen concentration (0.41 ± 0.39 mg O2/L). The ammonia removal by AOB and Anammox bacteria was determined to be 7.53 mg N/L·d (76.5%) and 2.12 mg N/L·d (23.5%), respectively. High temperature aeration in MABRs with the Anammox process shows a promising potential for improving energy consumption and sustainable nitrogen removal in wastewater treatment systems.","PeriodicalId":11886,"journal":{"name":"Environments","volume":"2 21","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Environments","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3390/environments11070155","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 0

Abstract

Nutrient removal in conventional wastewater treatment systems is expensive due to the high aeration costs. An alternative method for effective and sustainable nitrogen removal in wastewater treatment is anaerobic ammonium oxidation (Anammox) implemented with other innovative technologies, such as membrane-aerated biofilm reactors (MABRs). A major challenge associated with the Anammox process is effective control of nitrite-oxidizing bacteria (NOB). High temperature operation in wastewater treatment systems can promote Anammox bacterial growth and inhibit NOB activity. This research aims to investigate the feasibility of integrating Anammox processes with a lab-scale MABR and to examine the effects of high temperature aeration supplied to MABR systems on Anammox bacterial growth and NOB suppression. Experimental results indicate that the membrane’s air permeability was a critical parameter for the successful operation of Anammox-integrated MABR systems due to its influence on the system’s dissolved oxygen concentration (0.41 ± 0.39 mg O2/L). The ammonia removal by AOB and Anammox bacteria was determined to be 7.53 mg N/L·d (76.5%) and 2.12 mg N/L·d (23.5%), respectively. High temperature aeration in MABRs with the Anammox process shows a promising potential for improving energy consumption and sustainable nitrogen removal in wastewater treatment systems.

查看原文本刊更多论文

加热曝气用于亚硝酸盐氧化细菌（NOB）在氨氧化集成膜曝气生物膜反应器（MABR）中的控制

由于曝气成本高昂，传统废水处理系统中的营养物去除成本高昂。在废水处理中实现有效和可持续脱氮的另一种方法是厌氧氨氧化（Anammox），并与膜通气生物膜反应器（MABRs）等其他创新技术结合使用。与 Anammox 工艺相关的一个主要挑战是有效控制亚硝酸盐氧化细菌（NOB）。废水处理系统中的高温运行会促进 Anammox 细菌的生长，抑制 NOB 的活性。本研究旨在探讨将 Anammox 工艺与实验室规模的 MABR 相结合的可行性，并研究向 MABR 系统提供高温曝气对 Anammox 细菌生长和 NOB 抑制的影响。实验结果表明，由于膜的透气性对系统溶解氧浓度（0.41 ± 0.39 mg O2/L）的影响，因此膜的透气性是 Anammox 集成 MABR 系统成功运行的关键参数。经测定，AOB 和 Anammox 细菌的氨去除率分别为 7.53 mg N/L-d（76.5%）和 2.12 mg N/L-d（23.5%）。采用 Anammox 工艺的 MABRs 中的高温曝气在改善废水处理系统的能耗和可持续脱氮方面显示出巨大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Environments

自引率

0.00%

发文量