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Dan Q, Wang T, Li J, Zhang Q, Peng Y. Enhanced anammox performance under lower nitrite accumulation in modified partial nitritation-anammox (PN/A) process. BIORESOURCE TECHNOLOGY 2024; 406:131018. [PMID: 38908763 DOI: 10.1016/j.biortech.2024.131018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Revised: 06/18/2024] [Accepted: 06/19/2024] [Indexed: 06/24/2024]
Abstract
Higher nitrite accumulation, which is challenging to achieve reliably, is always sought to obtain better nitrogen removal performance in traditional partial nitritation-anammox (PN/A) process. This study developed a modified PN/A process by introducing nitrite-oxidizing bacteria and endogenous metabolism. Advanced nitrogen removal performance of 95.5 % was achieved at a low C/N ratio of 2.7 under nitrite accumulation ratio (NAR) fluctuations. Higher nitrate accumulation at lower NAR (70 ∼ 40 %) resulted in superior anammox contribution (60 ∼ 75 %) and nitrogen removal performance (93 ∼ 98 %). This was attributed to the higher nitrogen removal efficiency of the post-anoxic endogenous partial denitrification coupling anammox process, although the PN/A process occurring first possessed a faster anammox rate of 2.0 mg NH4+-N /(g VSS⋅h). The introduction of nitrate allowed more nitrite flow to anammox, promoting a high enrichment of anammox bacteria (Ca. Brocadia, 0.3 % to 2.8 %). This study provides new insights into the practical application of the PN/A process.
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Affiliation(s)
- Qiongpeng Dan
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Tong Wang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Jianwei Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Qiong Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
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Zhang X, Zhang X, Chen J, Wu P, Yang Z, Zhou L, Zhu Z, Wu Z, Zhang K, Wang Y, Ruth G. A critical review of improving mainstream anammox systems: Based on macroscopic process regulation and microscopic enhancement mechanisms. ENVIRONMENTAL RESEARCH 2023; 236:116770. [PMID: 37516268 DOI: 10.1016/j.envres.2023.116770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 07/22/2023] [Accepted: 07/27/2023] [Indexed: 07/31/2023]
Abstract
Full-scale anaerobic ammonium oxidation (anammox) engineering applications are vastly limited by the sensitivity of anammox bacteria to the complex mainstream ambience factors. Therefore, it is of great necessity to comprehensively summarize and overcome performance-related challenges in mainstream anammox process at the macro/micro level, including the macroscopic process variable regulation and microscopic biological metabolic enhancement. This article systematically reviewed the recent important advances in the enrichment and retention of anammox bacteria and main factors affecting metabolic regulation under mainstream conditions, and proposed key strategies for the related performance optimization. The characteristics and behavior mechanism of anammox consortia in response to mainstream environment were then discussed in details, and we revealed that the synergistic nitrogen metabolism of multi-functional bacterial genera based on anammox microbiome was conducive to mainstream anammox nitrogen removal processes. Finally, the critical outcomes of anammox extracellular electron transfer (EET) at the micro level were well presented, carbon-based conductive materials or exogenous electron shuttles can stimulate and mediate anammox EET in mainstream environments to optimize system performance from a micro perspective. Overall, this review advances the extensive implementation of mainstream anammox practice in future as well as shedding new light on the related EET and microbial mechanisms.
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Affiliation(s)
- Xiaonong Zhang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
| | - Xingxing Zhang
- School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Junjiang Chen
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
| | - Peng Wu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China; National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology, No. 1 Kerui Road, Suzhou, 215009, PR China; Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment, No. 1 Kerui Road, Suzhou, 215009, PR China.
| | - Zhiqiu Yang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
| | - Li Zhou
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
| | - Zixuan Zhu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
| | - Zhiqiang Wu
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
| | - Kangyu Zhang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
| | - Yiwen Wang
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
| | - Guerra Ruth
- School of Environmental Science and Engineering, Suzhou University of Science and Technology, No. 1 Kerui Road, Suzhou, 215009, PR China
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Zhang Y, Wang F, Zhao Z. Metabonomics reveals that entomopathogenic nematodes mediate tryptophan metabolites that kill host insects. Front Microbiol 2022; 13:1042145. [PMID: 36439848 PMCID: PMC9686292 DOI: 10.3389/fmicb.2022.1042145] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 10/31/2022] [Indexed: 11/11/2022] Open
Abstract
The entomopathogenic nematode (EPN) Steinernema feltiae, which carries the symbiotic bacterium Xenorhabdus bovienii in its gut, is an important biocontrol agent. This EPN could produce a suite of complex metabolites and toxin proteins and lead to the death of host insects within 24–48 h. However, few studies have been performed on the key biomarkers released by EPNs to kill host insects. The objective of this study was to examine what substances produced by EPNs cause the death of host insects. We found that all densities of nematode suspensions exhibited insecticidal activities after hemocoelic injection into Galleria mellonella larvae. EPN infection 9 h later led to immunosuppression by activating insect esterase activity, but eventually, the host insect darkened and died. Before insect immunity was activated, we applied a high-resolution mass spectrometry-based metabolomics approach to determine the hemolymph of the wax moth G. mellonella infected by EPNs. The results indicated that the tryptophan (Trp) pathway of G. mellonella was significantly activated, and the contents of kynurenine (Kyn) and 3-hydroxyanthranilic acid (3-HAA) were markedly increased. Additionally, 3-HAA was highly toxic to G. mellonella and resulted in corrected mortalities of 62.50%. Tryptophan metabolites produced by EPNs are a potential marker to kill insects, opening up a novel line of inquiry into exploring the infestation mechanism of EPNs.
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Affiliation(s)
- Yuan Zhang
- Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing, China
| | - Fang Wang
- Institute of Plant Protection, Ningxia Academy of Agricultural and Forestry Sciences, Ningxia, China
| | - Zihua Zhao
- Department of Plant Biosecurity, College of Plant Protection, China Agricultural University, Beijing, China
- *Correspondence: Zihua Zhao,
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Ren ZQ, Wang H, Zhang LG, Du XN, Huang BC, Jin RC. A review of anammox-based nitrogen removal technology: From microbial diversity to engineering applications. BIORESOURCE TECHNOLOGY 2022; 363:127896. [PMID: 36070811 DOI: 10.1016/j.biortech.2022.127896] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 08/29/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
The anaerobic ammonium oxidation (anammox) process has the advantages of high efficiency and low energy consumption, so it has broad application prospects in biological denitrification of wastewater. However, the application of anammox technology to existing wastewater treatment is still challenging. The main problems are the insufficient supply of nitrite and the susceptibility of anammox bacteria to environmental factors. In this paper, from the perspective of the diversity of anammox bacteria, the habitats and characteristics of anammox bacteria of different genera were compared. At the same time, laboratory research and engineering applications of anammox technology in treating wastewater from different sources were reviewed, and the progress of and obstacles to the practical application of anammox technology were clarified. Finally, a focus for future research was proposed to intensively study the water quality barrier factors of anammox and its regulation strategies. Meanwhile, a combined process was developed and optimized on this basis.
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Affiliation(s)
- Zhi-Qi Ren
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Hao Wang
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Li-Ge Zhang
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Xue-Ning Du
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Bao-Cheng Huang
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China; School of Engineering, Hangzhou Normal University, Hangzhou 310018, China
| | - Ren-Cun Jin
- Laboratory of Water Pollution Remediation, School of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China; School of Engineering, Hangzhou Normal University, Hangzhou 310018, China.
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Kouba V, Hurkova K, Navratilova K, Vejmelkova D, Benakova A, Laureni M, Vodickova P, Podzimek T, Lipovova P, van Niftrik L, Hajslova J, van Loosdrecht MCM, Weissbrodt DG, Bartacek J. On anammox activity at low temperature: effect of ladderane composition and process conditions. CHEMICAL ENGINEERING JOURNAL (LAUSANNE, SWITZERLAND : 1996) 2022; 445:136712. [PMID: 35794882 PMCID: PMC7612987 DOI: 10.1016/j.cej.2022.136712] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The application of partial nitritation-anammox (PN/A) under mainstream conditions can enable substantial cost savings at wastewater treatment plants (WWTPs), but how process conditions and cell physiology affect anammox performance at psychrophilic temperatures below 15 °C remains poorly understood. We tested 14 anammox communities, including 8 from globally-installed PN/A processes, for (i) specific activity at 10-30 °C, (ii) composition of membrane lipids, and (iii) microbial community structure. We observed that membrane composition and cultivation temperature were closely related to the activity of anammox biomasses. The size of ladderane lipids and the content of bacteriohopanoids were key physiological components related to anammox performance at low temperatures. We also indicate that the adaptation of mesophilic cultures to psychrophilic regime necessitates months, but in some cases can take up to 5 years. Interestingly, biomass enriched in the marine genus "Candidatus Scalindua" displayed outstanding potential for nitrogen removal from cold streams. Collectively, our comprehensive study provides essential knowledge of cold adaptation mechanism, will enable more accurate modelling and suggests highly promising target anammox genera for inoculation and set-up of anammox reactors, in particular for mainstream WWTPs.
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Affiliation(s)
- V Kouba
- University of Chemistry and Technology Prague, Department of Water Technology and Environmental Engineering, Technická 5, 166 28 Prague, Czechia
| | - K Hurkova
- University of Chemistry and Technology Prague, Department of Food Analysis and Nutrition, Technická 5, 166 28 Prague, Czechia
| | - K Navratilova
- University of Chemistry and Technology Prague, Department of Food Analysis and Nutrition, Technická 5, 166 28 Prague, Czechia
| | - D Vejmelkova
- University of Chemistry and Technology Prague, Department of Water Technology and Environmental Engineering, Technická 5, 166 28 Prague, Czechia
| | - A Benakova
- University of Chemistry and Technology Prague, Department of Water Technology and Environmental Engineering, Technická 5, 166 28 Prague, Czechia
| | - M Laureni
- Delft University of Technology, Department of Biotechnology, Building 58, Van der Maasweg 9, 2629 HZ, Delft
| | - P Vodickova
- University of Chemistry and Technology Prague, Department of Water Technology and Environmental Engineering, Technická 5, 166 28 Prague, Czechia
- University of Chemistry and Technology Prague, Department of Biochemistry and Microbiology, Technická 5, 166 28 Prague, Czechia
| | - T Podzimek
- University of Chemistry and Technology Prague, Department of Biochemistry and Microbiology, Technická 5, 166 28 Prague, Czechia
| | - P Lipovova
- University of Chemistry and Technology Prague, Department of Biochemistry and Microbiology, Technická 5, 166 28 Prague, Czechia
| | - L van Niftrik
- Radboud University, Department of Microbiology, Institute for Water and Wetland Research, 1Heyendaalseweg 135, 6525 ED AJ Nijmegen, The Netherlands
| | - J Hajslova
- University of Chemistry and Technology Prague, Department of Food Analysis and Nutrition, Technická 5, 166 28 Prague, Czechia
| | - MCM van Loosdrecht
- Delft University of Technology, Department of Biotechnology, Building 58, Van der Maasweg 9, 2629 HZ, Delft
| | - DG Weissbrodt
- Delft University of Technology, Department of Biotechnology, Building 58, Van der Maasweg 9, 2629 HZ, Delft
| | - J Bartacek
- University of Chemistry and Technology Prague, Department of Water Technology and Environmental Engineering, Technická 5, 166 28 Prague, Czechia
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