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Lai Y, Zhu Y, Li X, Zhang G, Lian J, Wang S. Ultrasound-induced structural changes in partial nitrification sludge: Unravelling the mechanism for improved nitrogen removal. ENVIRONMENTAL RESEARCH 2024; 261:119637. [PMID: 39032620 DOI: 10.1016/j.envres.2024.119637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/11/2024] [Accepted: 07/16/2024] [Indexed: 07/23/2024]
Abstract
Low-intensity ultrasound, as a form of biological enhancement technology, holds significant importance in the field of biological nitrogen removal. This study utilized low-intensity ultrasound (200 W, 6 min) to enhance partial nitrification and investigated its impact on sludge structure, as well as the internal relationship between structure and properties. The results demonstrated that ultrasound induced a higher concentration of nitrite in the effluent (40.16 > 24.48 mg/L), accompanied by a 67.76% increase in the activity of ammonia monooxygenase (AMO) and a 41.12% increase in the activity of hydroxylamine oxidoreductase (HAO), benefiting the partial nitrification. Based on the extended Derjaguin-Landau-Verwey-Overbeek (XDLVO) theoretical analysis, ultrasonic treatment enhanced the electrostatic interaction energy (WR) between sludge flocs, raising the total interaction energy from 46.26 kT to 185.54 kT, thereby causing sludge dispersion. This structural alteration was primarily attributed to the fact that the tightly bonded extracellular polymer (TB-EPS) after ultrasound was found to increase hydrophilicity and negative charge, weakening the adsorption between sludge cells. In summary, this study elucidated that the change in sludge structure caused by ultrasonic treatment has the potential to enhance the nitrogen removal performance by partial nitrification.
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Affiliation(s)
- Yafen Lai
- Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Yichun Zhu
- Jiangxi Key Laboratory of Mining & Metallurgy Environmental Pollution Control, Jiangxi University of Science and Technology, Ganzhou, 341000, China.
| | - Xiaochao Li
- Jiangxi Provincial Key Laboratory of Water Ecological Conservation at Headwater Regions, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin, 300401, China
| | - Junfeng Lian
- Jiangxi Provincial Key Laboratory of Water Ecological Conservation at Headwater Regions, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - Shihao Wang
- Jiangxi Provincial Key Laboratory of Water Ecological Conservation at Headwater Regions, Jiangxi University of Science and Technology, Ganzhou, 341000, China
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2
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Wen H, Cheng D, Chen Y, Yue W, Zhang Z. Review on ultrasonic technology enhanced biological treatment of wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 925:171260. [PMID: 38417513 DOI: 10.1016/j.scitotenv.2024.171260] [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: 11/17/2023] [Revised: 02/23/2024] [Accepted: 02/23/2024] [Indexed: 03/01/2024]
Abstract
As a clean, sustainable and efficient technology of wastewater treatment, ultrasonic irradiation has gained special attention in wastewater treatment. It has been widely studied for degrading pollutants and enhancing biological treatment processes for wastewater treatment. This review focuses on the mechanism and updated information of ultrasonic technology to enhance biological treatment of wastewater. The mechanism involved in improving biological treatment by ultrasonic includes: 1) degradation of refractory substances and release carbon from sludges, 2) promotion of mass transfer and change of cell permeability, 3) facilitation of enzyme-catalyzed reactions and 4) influence of cell growth. Based on the above discussion, the effects of ultrasound on the enhancement of wastewater biological treatment processes can be categorized into indirect and direct ways. The indirect effect of ultrasonic waves in enhancing biological treatment is mainly achieved through the use of high-intensity ultrasonic waves. These waves can be used as a pretreatment to improve biodegradability of the wastewater. Moreover, the ultrasonic-treated sludge or its supernatant can serve as a carbon source for the treatment system. Low-intensity ultrasound is often employed to directly enhance the biological treatment of wastewater. The propose of this process is to improve activated sludge, domesticate polyphosphate-accumulating organisms, ammonia-oxidizing bacteria, and anammox bacteria, and achieve speedy start-up of partial nitrification and anammox. It has shown remarkable effects on maintaining stable operation, tolerating adverse conditions (i.e., low temperature, low C/N, etc.), resisting shock load (i.e., organic load, toxic load, etc.), and collapse recovery. These results indicate a promising future for biological wastewater treatment. Furthermore, virous ultrasonic reactor designs were presented, and their potential for engineering application was discussed.
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Affiliation(s)
- Haiting Wen
- School of Environment and Nature Resources, Renmin University of China, Beijing 100872, PR China
| | - Dongle Cheng
- College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, PR China.
| | - Yanlin Chen
- Chongqing Three Gorges Eco-Environmental technology innovation center Co., Ltd, Chongqing 401329, PR China
| | - Wenhui Yue
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, PR China
| | - Zehao Zhang
- National Engineering Laboratory of Urban Sewage Advanced Treatment and Resource Utilization Technology, The College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, PR China.
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3
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Han X, Zhang L, Yuan Y, Zhang Q, Peng Y. Anaerobic starvation realizes partial nitrification and starts anammox bacteria self-enrichment in mainstream municipal sewage treatment in a low filling ratio sequencing batch reactor. BIORESOURCE TECHNOLOGY 2023; 387:129505. [PMID: 37468012 DOI: 10.1016/j.biortech.2023.129505] [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: 06/09/2023] [Revised: 07/11/2023] [Accepted: 07/16/2023] [Indexed: 07/21/2023]
Abstract
The initiating and stable preservation of partial nitrification (PN) and achievement of anammox bacteria self-enrichment in domestic sewage is a purposeful subject. In this article, an originality tactics of anaerobic starvation for 100 days was adopted for rapidly achieving PN in actual wastewater, the nitrite accumulation rate (NAR) improved from 4.95% to 81.73% in 18 days. After anaerobic starvation was stopped, the stable PN effect furnished enough stroma for the growth of anammox bacteria. The abundance of Candidatus Brocadia grew from 0% to 0.42% in floc sludge and 0.43% in blank biofilm, which promoted nitrogen removal effect. Anaerobic starvation continuing 74 days generated further decrease in the abundance of Nitrobacter and Nitrospira of nitrite-oxidizing bacteria (NOB), indicating that anaerobic starvation can restore the destroyed partial nitrification. In conclusion, this article furnished a low-cost method for achieving anammox bacteria self-enrichment in mainstream municipal wastewater in 10% filling ratio without chemicals addition.
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Affiliation(s)
- Xueke Han
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Liyuan Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Yue Yuan
- Shanghai Municipal Engineering Design Institute (Group) Co., Ltd., Shanghai 200092, 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, 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, China.
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4
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Xie Y, Zhu Y, Yang J, Zhang G, Tian S, Lian J, Dong S. Effect of ultrasound on the stability of partial nitrification: Under the interference of aeration rate. ULTRASONICS SONOCHEMISTRY 2023; 100:106642. [PMID: 37838531 PMCID: PMC10653954 DOI: 10.1016/j.ultsonch.2023.106642] [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: 03/12/2023] [Revised: 09/23/2023] [Accepted: 10/07/2023] [Indexed: 10/16/2023]
Abstract
The fluctuation of dissolved oxygen is one of the primary cause of disruptions to the consistent operation of partial nitrification, and the level of dissolved oxygen is mainly controlled by the aeration rate. This study investigated the influence of ultrasonic treatment on the stability of partial nitrification of activated sludge under different aeration conditions. After being treated with ultrasound (energy density = 0.20 W·mL-1, treatment time = 10 min), partial nitrification process operated stably for 67 days, with the nitrite accumulation rate above 83.89 %. The effluent contained 42.50 mg·L-1 of nitrite, much higher than the control reactor (0.30 mg·L-1). The gap between the specific ammonia and nitrite oxidation rates widened continuously as the aeration rate increased, and nitrite-oxidizing bacteria activity did not recover even under conditions with a very high oxygen content. Further analysis showed that ultrasonic treatment had obvious stripping effect on excess extracellular polymeric substances (EPS), especially loosely bound EPS and protein. Additionally, long-term ultrasonic treatment promoted the enrichment of Nitrosomonas and strongly inhibited Nitrotoga. Based on these findings, it appears that under conditions of high aeration rate, ultrasound effectively suppress the recovery of Nitrotoga activity and improve the stability of partial nitrification.
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Affiliation(s)
- Ying Xie
- Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Yichun Zhu
- Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Jieyuan Yang
- Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Shuai Tian
- Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Junfeng Lian
- Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Shanyan Dong
- Jiangxi Provincial Key Laboratory of Environmental Geotechnology and Engineering Disaster Control, Jiangxi University of Science and Technology, Ganzhou 341000, China
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5
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Bootrak D, Rongsayamanont W, Jaidumrong T, Rongsayamanont C. Effect of phosphorylated polyvinyl alcohol matrix size of cell entrapment on partial nitrification of ammonia in wastewater. ENVIRONMENTAL TECHNOLOGY 2023; 44:4033-4045. [PMID: 35549830 DOI: 10.1080/09593330.2022.2078231] [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: 12/23/2021] [Accepted: 04/12/2022] [Indexed: 06/15/2023]
Abstract
Partial nitrification is known as first and critical step for autotrophic nitrogen removal in high strength nitrogenous wastewater. Phosphorylated polyvinyl alcohol gel entrapment was used for suppressing oxygen to nitrite-oxidizing bacteria (NOB) in the gel matrix. The study investigated the effect of the size of gel matrix on partial nitrification. Results show that ammonia-oxidizing bacteria (AOB) proportion in the inoculum rather than the size of gel matrix governed ammonia oxidation. Nitrite oxidation depended on the size of gel matrix not the relative proportions of NOB and AOB in the inoculum. Larger size of gel matrix lead to less in situ oxygen penetration and available for NOB resulting in higher nitrite accumulation. This finding gains a better understanding of using suitable inoculum to control partial nitrification that is beneficial for the preparation of anaerobic ammonium oxidation-suited effluent.
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Affiliation(s)
- Darak Bootrak
- Faculty of Environmental Management, Prince of Songkla University, Songkhla, Thailand
| | | | - Tunyakamon Jaidumrong
- Faculty of Environmental Management, Prince of Songkla University, Songkhla, Thailand
| | - Chaiwat Rongsayamanont
- Faculty of Environmental Management, Prince of Songkla University, Songkhla, Thailand
- Environmental Assessment and Technology for Hazardous Waste Management Research Center, Faculty of Environmental Management, Prince of Songkla University, Songkhla, Thailand
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Su Z, Liu T, Guo J, Zheng M. Nitrite Oxidation in Wastewater Treatment: Microbial Adaptation and Suppression Challenges. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:12557-12570. [PMID: 37589598 PMCID: PMC10470456 DOI: 10.1021/acs.est.3c00636] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 08/08/2023] [Accepted: 08/09/2023] [Indexed: 08/18/2023]
Abstract
Microbial nitrite oxidation is the primary pathway that generates nitrate in wastewater treatment systems and can be performed by a variety of microbes: namely, nitrite-oxidizing bacteria (NOB). Since NOB were first isolated 130 years ago, the understanding of the phylogenetical and physiological diversities of NOB has been gradually deepened. In recent endeavors of advanced biological nitrogen removal, NOB have been more considered as a troublesome disruptor, and strategies on NOB suppression often fail in practice after long-term operation due to the growth of specific NOB that are able to adapt to even harsh conditions. In line with a review of the history of currently known NOB genera, a phylogenetic tree is constructed to exhibit a wide range of NOB in different phyla. In addition, the growth behavior and metabolic performance of different NOB strains are summarized. These specific features of various NOB (e.g., high oxygen affinity of Nitrospira, tolerance to chemical inhibitors of Nitrobacter and Candidatus Nitrotoga, and preference to high temperature of Nitrolancea) highlight the differentiation of the NOB ecological niche in biological nitrogen processes and potentially support their adaptation to different suppression strategies (e.g., low dissolved oxygen, chemical treatment, and high temperature). This review implicates the acquired physiological characteristics of NOB to their emergence from a genomic and ecological perspective and emphasizes the importance of understanding physiological characterization and genomic information in future wastewater treatment studies.
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Affiliation(s)
- Zicheng Su
- Australian Centre for Water
and Environmental Biotechnology, The University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Tao Liu
- Australian Centre for Water
and Environmental Biotechnology, The University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Jianhua Guo
- Australian Centre for Water
and Environmental Biotechnology, The University
of Queensland, St. Lucia, Queensland 4072, Australia
| | - Min Zheng
- Australian Centre for Water
and Environmental Biotechnology, The University
of Queensland, St. Lucia, Queensland 4072, Australia
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7
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Chen J, Liang J, Li C, Dai J, Mai W, Wei Y. An enriched ammonia-oxidizing microbiota enables high removal efficiency of ammonia in antibiotic production wastewater. CHEMOSPHERE 2023; 310:136854. [PMID: 36243093 DOI: 10.1016/j.chemosphere.2022.136854] [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: 03/02/2022] [Revised: 08/22/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023]
Abstract
High ammonia concentration hinders the efficient treatment of antibiotic production wastewater (APW). Developing effective ammonia oxidation wastewater treatment strategies is an ideal approach for facilitating APW treatment. Compared with traditional nitrification strategies, the partial nitrification process is more eco-friendly, less energy-intensive, and less excess sludge. The primary limiting factor of the partial nitrification process is increasing ammonia-oxidizing bacteria (AOB) while decreasing nitrite-oxidizing bacteria (NOB). In this study, an efficient AOB microbiota (named AF2) was obtained via enrichment of an aerobic activated sludge (AS0) collected from a pharmaceutical wastewater treatment plant. After a 52-day enrichment of AS0 in 250 mL flasks, the microbiota AE1 with 69.18% Nitrosomonas microorganisms was obtained. Subsequent scaled-up cultivation in a 10 L fermenter led to the AF2 microbiota with 59.22% Nitrosomonas. Low concentration of free ammonia (FA, < 42.01 mg L-1) had a negligible effect on the activity of AF2, and the nitrite-nitrogen accumulation rate (NAR) of AF2 was 98% when FA concentration was 42.01 mg L-1. The specific ammonia oxidation rates (SAORs) at 30 °C and 15 °C were 3.64 kg NH4+-N·kg MLVSS-1·d-1 and 1.43 kg NH4+-N·kg MLVSS-1·d-1 (MLVSS: mixed liquor volatile suspended solids). The SAOR was 0.52 kg NH4+-N·kg MLVSS-1·d-1 when the NaCl concentration was increased from 0 to 20 g L-1, showing that AF2 functioning was stable in a high-level salt environment. The ammonia oxidation performance of AF2 was verified by treating abamectin and lincomycin production wastewater. The NARs of AF2 used for abamectin and lincomycin production wastewater treatment were >90% and the SAORs were 2.39 kg NH4+-N·kg MLVSS-1·d-1 and 0.54 kg NH4+-N·kg MLVSS-1·d-1, respectively, which was higher than the traditional biological denitrification process. In summary, AF2 was effective for APW treatment via enhanced ammonia removal efficiency, demonstrating great potential for future industrial wastewater treatment.
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Affiliation(s)
- Jiamin Chen
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, 450001, PR China
| | - Jiawei Liang
- College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, PR China; Research Center for Eco-friendly Wastewater Purifying Engineering Technology of Henan Province, Henan Junhe Environmental Protection Technology CO.LTD, Zhengzhou, Henan, 450001, PR China
| | - Chenjing Li
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, 450001, PR China
| | - Jihua Dai
- Research Center for Eco-friendly Wastewater Purifying Engineering Technology of Henan Province, Henan Junhe Environmental Protection Technology CO.LTD, Zhengzhou, Henan, 450001, PR China
| | - Wenning Mai
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, Henan, 450001, PR China; College of Public Health, Zhengzhou University, Zhengzhou, Henan, 450001, PR China.
| | - Yongjun Wei
- Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, Henan, 450001, PR China; Laboratory of Synthetic Biology, Zhengzhou University, Zhengzhou, 450051, PR China.
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8
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Deng L, Peng Y, Wu C, Gao R, Li W, Kao C, Li J. Mutual boost of granulation and enrichment of anammox bacteria in an anaerobic/oxic/anoxic system as the temperature decreases when treating municipal wastewater. BIORESOURCE TECHNOLOGY 2022; 357:127336. [PMID: 35618188 DOI: 10.1016/j.biortech.2022.127336] [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: 04/21/2022] [Revised: 05/13/2022] [Accepted: 05/14/2022] [Indexed: 06/15/2023]
Abstract
Low temperature is an important factor affecting the municipal wastewater treatment systems. The aim of this study was tracking the variations in the abundance of anammox bacteria (AnAOB) and the sludge form as the temperature decreased. Mutual boost of granulation and enrichment of AnAOB was achieved even though the temperature dropped from 20.4 °C to 12.9 °C. The average particle size of the sludge increased from 128.5 μm to 245.6 μm. With low dissolved oxygen (DO) aeration (0.2-0.5 mg/L) and short oxic hydraulic retention time (HRT) (5 h), nitritation in the anaerobic/oxic/anoxic (AOA) system was stable enough to provide NO2- for AnAOB. Ca. Brocadia, a type of typical AnAOB, was enriched from 0.03% to 0.24% in the suspended sludge and reached 16.09% in the granular sludge. Overall, this study presents the prospects of anammox and granule technologies when treating municipal wastewater at a low temperature.
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Affiliation(s)
- Liyan Deng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China; College of Water Sciences, Beijing Normal University, Beijing 100875, 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, China
| | - Changyong Wu
- Research Center of Environmental Pollution Control Technology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Ruitao Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Wenyu Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Chengkun Kao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, 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, China.
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9
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Xue Y, Zheng M, Wu S, Liu Y, Huang X. Changes in the Species and Functional Composition of Activated Sludge Communities Revealed Mechanisms of Partial Nitrification Established by Ultrasonication. Front Microbiol 2022; 13:960608. [PMID: 35928152 PMCID: PMC9344063 DOI: 10.3389/fmicb.2022.960608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 06/22/2022] [Indexed: 11/20/2022] Open
Abstract
To achieve energy-efficient shortcut nitrogen removal of wastewater in the future, selective elimination of nitrite-oxidizing bacteria (NOB) while enriching ammonia-oxidizing microorganisms is a crucial step. However, the underlying mechanisms of partial nitrification are still not well understood, especially the newly discovered ultrasound-based partial nitrification. To elucidate this issue, in this study two bioreactors were set up, with one established partial nitrification by ultrasonication while the other didn't. During the operation of both reactors, the taxonomic and functional composition of the microbial community were investigated through metagenomics analysis. The result showed that during ultrasonic partial nitrification, ammonia-oxidizing archaea (AOA), Nitrososphaerales, was enriched more than ammonia-oxidizing bacteria (AOB), Nitrosomonas. The enrichment of microorganisms in the community increased the abundance of genes involved in microbial energy generation from lipid and carbohydrates. On the other hand, the abundance of NOB, Nitrospira and Nitrolancea, and Comammox Nitrospira decreased. Selective inhibition of NOB was highly correlated with genes involved in signal transduction enzymes, such as encoding histidine kinase and serine/threonine kinase. These findings provided deep insight into partial nitrification and contributed to the development of shortcut nitrification in wastewater treatment plants.
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Affiliation(s)
- Yu Xue
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
| | - Min Zheng
- Australian Centre for Water and Environmental Biotechnology, The University of Queensland, St. Lucia, QLD, Australia
| | - Shuang Wu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
| | - Yanchen Liu
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
- *Correspondence: Yanchen Liu
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, China
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10
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Zhang L, Zhang L, Xu D. Application of low-intensity ultrasound to enhance simultaneous nitrification/iron-based autotrophic denitrification. Biotechnol Lett 2022; 44:1001-1010. [PMID: 35767163 DOI: 10.1007/s10529-022-03273-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Accepted: 06/12/2022] [Indexed: 11/26/2022]
Abstract
Intermittent ultrasound with an intensity of 0.2 W/ml was applied during simultaneous nitrification/iron-based autotrophic denitrification to evaluate its impacts on total nitrogen (TN) removal efficiency and microbial characteristics during low carbon/nitrogen ratio (C/N) wastewater treatment. At an optimal dissolved oxygen (DO) concentration of 1.2 mg/L, the TN removal rate was 91 ± 4%, and the TN concentration in the effluent decreased by 31% owing to the ultrasound treatment. In addition, the number of iron-compounds that formed in the sludge and wastewater increased by 55% and 37%, respectively. Low-intensity ultrasound caused a substantial increase in ammonia monooxygenase activity. Moreover, when the DO concentration increased to 1.2 mg/L, the activities of nitrate reductase and nitrite reductase, both of which are associated with denitrification, were effectively maintained. High-throughput sequencing indicated that low-intensity ultrasound enriched ammonium oxidising bacteria (Nitrosomonas) and suppressed the growth of heterotrophic denitrifying bacteria (Zoogloea and Simplicispira). These changes benefited simultaneous nitrification and autotrophic denitrification. Thus, low-intensity ultrasound promoted the simultaneous nitrification/iron-based autotrophic denitrification process during low C/N wastewater treatment.
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Affiliation(s)
- Lei Zhang
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China.
- Shenyang Academy of Environmental Sciences, Shenyang, 110167, China.
| | - Lixia Zhang
- CAS Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, 610041, China
| | - Danyu Xu
- Tianjin Academy of Eco-Environmental Sciences, Tianjin, 300191, China
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11
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Zhang L, Zhang Q, Dai J, Chen Y, Zhu Z, Li X, Peng Y. Rapidly achieving and optimizing simultaneous partial nitrification denitrification and anammox integrated process by hydroxylamine addition for advanced nitrogen removal from domestic wastewater. BIORESOURCE TECHNOLOGY 2021; 342:125987. [PMID: 34600317 DOI: 10.1016/j.biortech.2021.125987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/14/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
The achievement and stable maintenance of partial nitrification and partial anammox process for municipal sewage is a challenging research topic at present. In this study, a novel strategy of hydroxylamine (NH2OH) addition under low DO condition was adopted for rapidly achieving simultaneous partial nitrification denitrification and anammox process (SPNDA) to deal with domestic wastewater, the nitrite accumulation ratio (NAR) increased from 1% to 82% in the first 4 days. After the addition of NH2OH was stopped, the PN effect of SPNDA process remained relatively stable within 100 days. During the stable operation period with aerobic HRT of 5 h, the nitrogen removal efficiency was 87.9 ± 4.2%. Moreover, the abundance of denitrifying bacteria and Candidatus Brocadia increased from 1.79% and 0.062% to 22.49% and 0.38% respectively, which promoted nitrogen removal effect. Overall, this study provided a quickly way for achieving the cost-effective SPNDA process to enhance nitrogen removal with NH2OH addition.
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Affiliation(s)
- Liyuan 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
| | - 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
| | - Jiatong Dai
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yanhui Chen
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Zhuo Zhu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao 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
| | - 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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12
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Meroni D, Djellabi R, Ashokkumar M, Bianchi CL, Boffito DC. Sonoprocessing: From Concepts to Large-Scale Reactors. Chem Rev 2021; 122:3219-3258. [PMID: 34818504 DOI: 10.1021/acs.chemrev.1c00438] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Intensification of ultrasonic processes for diversified applications, including environmental remediation, extractions, food processes, and synthesis of materials, has received attention from the scientific community and industry. The mechanistic pathways involved in intensification of ultrasonic processes that include the ultrasonic generation of cavitation bubbles, radical formation upon their collapse, and the possibility of fine-tuning operating parameters for specific applications are all well documented in the literature. However, the scale-up of ultrasonic processes with large-scale sonochemical reactors for industrial applications remains a challenge. In this context, this review provides a complete overview of the current understanding of the role of operating parameters and reactor configuration on the sonochemical processes. Experimental and theoretical techniques to characterize the intensity and distribution of cavitation activity within sonoreactors are compared. Classes of laboratory and large-scale sonoreactors are reviewed, highlighting recent advances in batch and flow-through reactors. Finally, examples of large-scale sonoprocessing applications have been reviewed, discussing the major scale-up and sustainability challenges.
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Affiliation(s)
- Daniela Meroni
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Ridha Djellabi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | | | - Claudia L Bianchi
- Dipartimento di Chimica, Università degli Studi di Milano, Via Golgi 19, 20133 Milano, Italy
| | - Daria C Boffito
- Département de Génie Chimique, C.P. 6079, Polytechnique Montréal, Montréal H3C 3A7, Canada.,Canada Research Chair in Intensified Mechanochemical Processes for Sustainable Biomass Conversion, Department of Chemical Engineering, Polytechnique Montréal, C.P. 6079, Succ. CV, H3C 3A7 Montréal, Québec Canada
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13
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Wang F, Xu S, Liu L, Wang S, Ji M. One-stage partial nitrification and anammox process in a sequencing batch biofilm reactor: Start-up, nitrogen removal performance and bacterial community dynamics in response to temperature. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 772:145529. [PMID: 33581528 DOI: 10.1016/j.scitotenv.2021.145529] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 01/06/2021] [Accepted: 01/26/2021] [Indexed: 06/12/2023]
Abstract
A one-stage partial nitrification and anammox (PN/A) process was started up and operated under varying temperatures in a lab-scale sequencing batch biofilm reactor. The start‑up phase took 110 days with an intermittent aeration strategy, and the removal efficiencies of ammonia‑nitrogen and total nitrogen were found to be 92.22% and 76.07%, respectively. The total nitrogen removal efficiency (NRE) increased by 9.49% when temperature decreased from 30 °C to 25 °C, but declined by 83.84% from 25 °C to 20 °C. The PN process was inhibited and subsequently limited the nitrogen removal performance at 20 °C. When temperature returned to 28 °C, the NRE recovered to 67.27%, but it was still lower than the value before the decrease in temperature (79.40%). Microbial community analysis showed that the predominant ammonia oxidation bacteria and anammox bacteria were Nitrosomonas and Candidatus Kuenenia, respectively. Nitrosomonas grew, while the relative abundance of Candidatus Kuenenia increased as temperature decreased and vice versa.
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Affiliation(s)
- Fen Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China.
| | - Sihan Xu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Lingjie Liu
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
| | - Siyu Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China; China Urban Construction Design & Research Institute Co., Ltd, Beijing 100120, China
| | - Min Ji
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300350, China
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14
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Tian S, Huang S, Zhu Y, Zhang G, Lian J, Liu Z, Zhang L, Qin X. Effect of low-intensity ultrasound on partial nitrification: Performance, sludge characteristics, and properties of extracellular polymeric substances. ULTRASONICS SONOCHEMISTRY 2021; 73:105527. [PMID: 33770745 PMCID: PMC8010210 DOI: 10.1016/j.ultsonch.2021.105527] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 02/19/2021] [Accepted: 03/09/2021] [Indexed: 06/12/2023]
Abstract
Ultrasound technology, which is environment-friendly and economical, has emerged as a novel strategy that can be used to enhance the partial nitrification process. However, its effect on this process remains unclear. Therefore, in this study, partial nitrification sludge was subjected to low-intensity (0.15 W/mL) ultrasound treatment for 10 min, and the effect of ultrasonic treatment on the partial nitrification process was evaluated based on changes in reactor performance, sludge characteristics, and the properties of extracellular polymeric substances (EPS). The results obtained showed that the ultrasonic treatment enhanced nitrite accumulation performance as well as the activity of ammonia-oxidizing bacteria from 3.3 to 16.6 mg O2/g VSS,⋅while inhibiting the activity of nitrite-oxidizing bacteria. Further analysis showed that owing to the ultrasonic treatment, there was an increase in EPS contents. Particularly, there was a significant increase in loosely bound polysaccharide (PS) contents, indicating the occurrence of intracellular PS anabolics as well as PS secretion. Additionally, ultrasonic treatment induced a significant increase in carbonyl, hydroxyl, and amine functional group contents, and EPS analysis results revealed that it had a positive effect on mass transfer efficiency; thus, it enhanced the partial nitrification process. Overall, this study describes the effect of intermittent low-intensity ultrasound on the partial nitrification process as well as the associated enhancement mechanism.
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Affiliation(s)
- Shuai Tian
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Shuchang Huang
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Yichun Zhu
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Junfeng Lian
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Zuwen Liu
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Linan Zhang
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Xinxin Qin
- School of Civil and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
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15
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Deng L, Peng Y, Li J, Gao R, Li W, Du R. Enhanced simultaneous nitrogen and phosphorus removal from low COD/TIN domestic wastewater through nitritation-denitritation coupling improved anammox process with an optimal Anaerobic/Oxic/Anoxic strategy. BIORESOURCE TECHNOLOGY 2021; 322:124526. [PMID: 33338942 DOI: 10.1016/j.biortech.2020.124526] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 12/04/2020] [Accepted: 12/05/2020] [Indexed: 06/12/2023]
Abstract
Advanced nitrogen and phosphorus removal in a single-stage suspending-sludge system was achieved by employing a novel Anaerobic/Oxic/Anoxic (AOA) strategy over 200 days. Satisfactory total inorganic nitrogen (TIN) removal efficiency of 90.4% was achieved and effluent phosphorus was below 0.5 mg/L when treating domestic wastewater with the chemical oxygen demand (COD)/TIN as low as 2.98 ± 1.26. Stable nitritation was maintained with the ammonia residual and low dissolved oxygen of 0.2-0.5 mg/L at aerobic stage following by a post anoxic stage. The much higher activity of ammonia oxidation bacteria (12.99 mgN/gVSS/h) was achieved than the nitrite oxidation bacteria (0.09 mgN/gVSS/h). Notably, improved anammox performance was obtained without initial inoculation, contributing 47.4% to TIN removal. The abundance of Nitrosomonas increased from 0.12% to 0.95% (P < 0.001) and self-enrichment of anammox bacteria Ca. Brocadia was confirmed. It provided new insight into the advanced nutrient removal with comprehensible regulation and less aeration requirement.
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Affiliation(s)
- Liyan Deng
- 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
| | - 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
| | - Ruitao Gao
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Wenyu 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
| | - Rui Du
- 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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16
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Huang S, Zhu Y, Zhang G, Lian J, Liu Z, Zhang L, Tian S. Effects of low-intensity ultrasound on nitrite accumulation and microbial characteristics during partial nitrification. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 705:135985. [PMID: 31841915 DOI: 10.1016/j.scitotenv.2019.135985] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 11/12/2019] [Accepted: 12/05/2019] [Indexed: 06/10/2023]
Abstract
Ultrasound technology has attracted increasing attention in the field of sewage sludge treatment. This study investigated the nitrite accumulation ratio (NAR) and microbial characteristics of the partial nitrification (PN) process in a sequencing batch reactor employing ultrasonic treatment (ultrasound density = 0.25 W/mL, irradiation time = 10 min). PN was achieved over 73 days with a NAR above 85% under ambient temperatures. A low dissolved oxygen (DO) environment was generated in the reactor by enhancing the oxygen utilization rate of ammonia-oxidizing bacteria (AOB). Additionally, the application of long-term ultrasonic treatment led to the enhancement of the dominance of the Nitrosomonas genus of AOB, while populations of the Nitrospira genus of nitrite-oxidizing bacteria (NOB) were eradicated. At the same time, the activities of the aerobic denitrifying bacteria Thauera, Terrimonas, Defluviimonas, and Thermomonas were enhanced and their relative abundance was increased. Overall, the results suggest that ultrasonic treatment can enhance AOB activity and generate a low DO environment that facilitates effective PN.
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Affiliation(s)
- Shuchang Huang
- School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Yichun Zhu
- School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China.
| | - Guangming Zhang
- School of Energy & Environmental Engineering, Hebei University of Technology, Tianjin 300401, China.
| | - Junfeng Lian
- School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Zuwen Liu
- School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Linan Zhang
- School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - Shuai Tian
- School of Architectural and Surveying & Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China
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