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Elsayed A, Yu J, Lee T, Kim Y. Model study on real-time aeration based on nitrite for effective operation of single-stage anammox. ENVIRONMENTAL RESEARCH 2022; 212:113554. [PMID: 35644493 DOI: 10.1016/j.envres.2022.113554] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 05/11/2022] [Accepted: 05/20/2022] [Indexed: 06/15/2023]
Abstract
Anaerobic ammonia oxidation (Anammox) is an innovative technology for cost-efficient nitrogen removal without intensive aeration. However, effective control of the competition between nitrite oxidizing bacteria (XNOB) and Anammox bacteria (XANA) for nitrite is a key challenge for broad applications of single-stage Anammox processes in real wastewater treatment. Therefore, a real-time aeration scheme was proposed to determine dissolved oxygen (DO) based on nitrite concentration for effective control of XNOB growth while maintaining the XANA activity in a single-stage Anammox process. In this study, a non-steady state mathematical model was developed and calibrated using previously reported lab-scale Anammox results to investigate the efficiency of the proposed real-time aeration scheme in enhancing the Anammox process. Based on the calibrated model simulation results, DO of about 0.10 mg-O2/L was found to be ideal for maintaining effective nitrite creation by ammonia oxidizing bacteria (XAOB) while slowing down the growth of XNOB. If DO is too low (e.g., 0.01 mg-O2/L or lower), the overall rate of the ammonia removal is limited due to slow growth of XAOB. On the other hand, high DO (e.g., 1.0 mg-O2/L or higher) inhibits the growth of XANA, resulting in dominancy of XAOB and XNOB. According to the simulation results, nitrite concentration was found to be a rate-limiting parameter on effective nitrogen removal in single-stage Anammox processes. We also found that nitrite concentration can be used as a real-time switch for aeration in a single-stage Anammox process. A schematic aeration method based on real-time nitrite concentration was proposed and examined to control the competition between XANA and XNOB. In the model simulation, the XANA activity was successfully maintained because the schematic aeration prevented an outgrowth of XNOB, allowing energy-efficient nitrogen removal using single-stage Anammox processes.
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Affiliation(s)
- Ahmed Elsayed
- Department of Civil Engineering, McMaster University, Hamilton, Ontario, Canada; Irrigation and Hydraulics Department, Cairo University, Giza, Egypt
| | - Jaecheul Yu
- Department of Civil and Environmental Engineering, Pusan National University, Republic of Korea
| | - Taeho Lee
- Department of Civil and Environmental Engineering, Pusan National University, Republic of Korea
| | - Younggy Kim
- Department of Civil Engineering, McMaster University, Hamilton, Ontario, Canada.
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Shi Y, Fang H, Li YY, Wu H, Liu R, Niu Q. Single and simultaneous effects of naphthalene and salinity on anaerobic digestion: Response surface methodology, microbial community analysis and potential functions prediction. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2021; 291:118188. [PMID: 34547659 DOI: 10.1016/j.envpol.2021.118188] [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: 07/17/2021] [Revised: 08/27/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are a persistent and prevalent class of pollutants in petroleum-contaminated saline environment, which pose potential harm to organisms. Researches on anaerobic biodegradation of PAHs are gradually emerging, but the response of anaerobic microorganisms to salinity changes and the co-effects of salinity and PAHs in anaerobic digestion (AD) system have seldom been reported. Thus, we investigated the variations of AD system performance and anaerobic microbial community caused by different concentrations of naphthalene (Nap) or/and NaCl based on Box-Behnken Design (0 mg/L ≤ Nap ≤150 mg/L, 0 g/L ≤ NaCl ≤25 g/L). The promoted efficiencies of acidogenesis and methanogenesis were found in presence of moderate NaCl or Nap, but high salinity (NaCl >4.4 g/L) weakened AD performance. Moreover, the high salinity (NaCl >4.4 g/L) and Nap resulted in reduced microbial Ca2+ Mg2+- ATPase activity, poor EPS secretion and the highest difference of the microbial operational taxonomic units (OTUs), and synergistically inhibited AD process. Microbiological analysis revealed that the relative abundance of Clostridium and acetoclastic Methanosaeta was increased by 2.01 times and 2.17 times in single Nap treated group compared to control. With the simultaneous addition of NaCl and Nap, Proteiniphilum and hydrogenotrophic methanogens (Methanobacterium, Methanofollis, and Methanolinea) occupied the major abundance. Potential functions prediction indicated that high salinity could disrupt the co-metabolism between carbohydrate metabolism and Nap degradation. This study provides basis for anaerobic bioremediation of PAHs-polluted saline environment.
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Affiliation(s)
- Yongsen Shi
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Hongli Fang
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
| | - Hanyang Wu
- Jiangxi Bocent Advanced Ceramic Environmental Technology Co., Ltd, Pingxiang, 337000, Jiangxi Province, China
| | - Rutao Liu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China
| | - Qigui Niu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health, Shandong University, 72#Jimo Binhai Road, Qingdao, Shandong Province, 266237, China.
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Li B, Wang Y, Guo Y, Wang W, Huang X, Wang Z. Partial nitrification coupled with anammox in a biofilter reactor (BR) of large height-to-diameter ratio for treatment of wastewater with low C/N. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.02.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Xue Y, Ma H, Kong Z, Li YY. Formation Mechanism of hydroxyapatite encapsulation in Anammox-HAP Coupled Granular Sludge. WATER RESEARCH 2021; 193:116861. [PMID: 33548693 DOI: 10.1016/j.watres.2021.116861] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/15/2021] [Accepted: 01/20/2021] [Indexed: 06/12/2023]
Abstract
The potential of the formation of anammox-hydroxyapatite (HAP) granule composites as a cost-effective approach to removing nitrogen and phosphorus in the treatment of wastewater has been recently reported. Before these annamox granules, which consist of an anammox biofilm layer and an HAP crystallizing layer, can be used in applications, the formation mechanism of hydroxyapatite (HAP) encapsulation in the granules needs to be further studied. In this work, the role of extracellular polymeric substance (EPS) secreted by microorganisms and HAP core in Ca and P removal in anammox-HAP coupled granular sludge was investigated. According to the Lamer model, it is possible that the nucleation time of the granules becomes shorter as the crystal seeds. The enhanced buffering capacity of the granules was 0.08 mmol-H+ SS-g-1 with the pH kept above 6.5 for a comfortable environment for anammox. The results of this study show that ion competition and exchange, mainly between cations of Ca2+ and Mg2+ and between anions of PO43- and CO32-, affects the precipitation process. The results of this study indicate that the addition of granule crystal seeds can be used as a strategy to hasten the anammox process, and therefore accelerate the overall process.
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Affiliation(s)
- Yi Xue
- Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Haiyuan Ma
- Center for Material Cycles and Waste Management Research, National Institute for Environmental Studies, Tsukuba 305-8506, Japan
| | - Zhe Kong
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Yu-You Li
- Graduate School of Environmental Studies, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
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Wang C, Wu H, Zhu B, Song J, Lu T, Li YY, Niu Q. Investigation of the process stability of different anammox configurations and assessment of the simulation validity of various anammox-based kinetic models. RSC Adv 2020; 10:39171-39186. [PMID: 35518443 PMCID: PMC9057419 DOI: 10.1039/d0ra06813f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Accepted: 10/05/2020] [Indexed: 11/21/2022] Open
Abstract
Over the last 30 years, the successful implementation of the anammox process has attracted research interest from all over the world. Various reactor configurations were investigated for the anammox process. However, the construction of the anammox process is a delicate topic in regards to the high sensitivity of the biological reaction. To better understand the effects of configurations on the anammox performance, process-kinetic models and activity kinetic models were critically overviewed, respectively. A significant difference in the denitrification capabilities was observed even with similar dominated functional species of anammox with different configurations. Although the kinetic analysis gained insight into the feasibility of both batch and continuous processes, most models were often applied to match the kinetic data in an unsuitable manner. The validity assessment illustrated that the Grau second-order model and Stover–Kincannon model were the most appropriate and shareable reactor-kinetic models for different anammox configurations. This review plays an important role in the anammox process performance assessment and augmentation of the process control. Over the last 30 years, the successful implementation of the anammox process has attracted research interest from all over the world.![]()
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Affiliation(s)
- Chunyan Wang
- School of Biological and Chemical Engineering
- Nanyang Institute of Technology
- Nanyang 473004
- China
- School of Environmental Science and Engineering
| | - Hanyang Wu
- Jiangxi Bocent Advanced Ceramic Environmental Technology Co., Ltd
- Pingxiang 337000
- China
| | - Bin Zhu
- Jiangxi Bocent Advanced Ceramic Environmental Technology Co., Ltd
- Pingxiang 337000
- China
| | - Jianyang Song
- School of Biological and Chemical Engineering
- Nanyang Institute of Technology
- Nanyang 473004
- China
| | - Tingjie Lu
- Jiangxi Bocent Advanced Ceramic Environmental Technology Co., Ltd
- Pingxiang 337000
- China
| | - Yu-You Li
- Department of Civil and Environmental Engineering
- Graduate School of Engineering Tohoku University
- Japan
| | - Qigui Niu
- School of Environmental Science and Engineering
- Shandong University
- Jinan 250100
- China
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Song L, Li D, Cao X, Tang Y, Liu R, Niu Q, Li YY. Optimizing biomethane production of mesophilic chicken manure and sheep manure digestion: Mono-digestion and co-digestion kinetic investigation, autofluorescence analysis and microbial community assessment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 237:103-113. [PMID: 30780051 DOI: 10.1016/j.jenvman.2019.02.050] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2018] [Revised: 01/29/2019] [Accepted: 02/08/2019] [Indexed: 06/09/2023]
Abstract
Optimization of mesophilic methane production from Chicken manure (CM) and Sheep manure (SM) at total solid (TS) of 8% and 1.6% were obtained by sequence tests in mono-digestion. However, the positive synergy of co-digestion with an optimum CM/SM of 2.5 (310 mLCH4/gVSadded) resulted in a high hydrolytic capacity and methane production. The modified Gompertz model (R2 > 0.98) and modified Aiba model (R2 > 0.88) illustrated co-digestion significantly improved the methane generation rate with strong ammonia tolerance. Dissolved Organic Matter (DOM) variation in response to the metabolic rate of microbial community illustrated that the SMP-like and protein-like components half-split by EEM-PARAFAC were significantly negative corresponded to bio-methane production. Moreover, the canonical correlation analysis (CCA) resulted a significant difference between the substrate and DOM composition. Potential functional metabolic illustrated statistically significance difference between mono and co-digestion, however, Methanosaeta and Syntrophobacter predominated the syntrophic methanogenesis. The constructed complex metabolic cooperation caused the co-digestion stable and high efficiency.
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Affiliation(s)
- Liuying Song
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Dunjie Li
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Xiangyunong Cao
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Yu Tang
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China
| | - Qigui Niu
- School of Environmental Science and Engineering, Shandong University, Shandong Province, 72#Jimo Binhai Road, Qingdao, 266237, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology (Jiangnan University), Wuxi, 214122, PR China.
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Aramaki, Aoba-ku, Sendai, 980-8579, Japan
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Qiao L, Xu W, Mao S, Li Y, Zhang Y. Study on the expanded culture and kinetics of anammox bacteria in the upper flow packed bed. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 650:1173-1181. [PMID: 30308805 DOI: 10.1016/j.scitotenv.2018.08.404] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 08/24/2018] [Accepted: 08/28/2018] [Indexed: 06/08/2023]
Abstract
Anaerobic ammonium oxidation (Anammox) technology has a unique advantage in the simultaneous treatment of ammonia nitrogen and nitrite nitrogen. Kinetics models were usually utilized to identify an expanded anammox reactor to be efficient and stable. And the high-throughput sequencing test had been utilized to identify different kinds of anammox bacteria for a long time. The Monod model showed that the theoretical maximum total nitrogen removal concentration was near 1700 mgN/(gVSS·d). Nitrite nitrogen was an obvious inhibitor of anammox bacteria based on the kinetics results of both Monod model and Haldane model. The Luong model indicated that there was still a great potential of improvement of total influent nitrogen concentration. And the Modified Stover-Kincannon Model and Grau second-order model were applicable to describe stable operation of the reactor. While, high-throughput sequencing test results indicated that the bacteria Candidatus Kuenenia was the dominant anammox bacteria of this reactor, which meant that Candidatus Kuenenia was more applicable for operation condition of the reactor. Interestingly, the original bacterium Candidatus Anammoxoglobus was gradually eliminated during the operation phase. The reactor still had a quite high potential for the removal of the substrate. In the process of culture expansion, the phenomenon of bacterial species alteration had emerged, which was relatively rare in previous papers.
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Affiliation(s)
- Liang Qiao
- School of Environmental Science and Spatial Informatics, CUMT, Xuzhou 221116, Jiangsu Province, China
| | - Wen Xu
- School of Environmental Science and Spatial Informatics, CUMT, Xuzhou 221116, Jiangsu Province, China
| | - Shengxin Mao
- School of Environmental Science and Spatial Informatics, CUMT, Xuzhou 221116, Jiangsu Province, China
| | - Yan Li
- School of Environmental Science and Spatial Informatics, CUMT, Xuzhou 221116, Jiangsu Province, China.
| | - Yanqiu Zhang
- School of Environmental Science and Spatial Informatics, CUMT, Xuzhou 221116, Jiangsu Province, China
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8
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Du R, Cao S, Li B, Zhang H, Wang S, Peng Y. Synergy of partial-denitrification and anammox in continuously fed upflow sludge blanket reactor for simultaneous nitrate and ammonia removal at room temperature. BIORESOURCE TECHNOLOGY 2019; 274:386-394. [PMID: 30551041 DOI: 10.1016/j.biortech.2018.11.101] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 11/27/2018] [Accepted: 11/29/2018] [Indexed: 06/09/2023]
Abstract
In this study, the synergy of high nitrite (NO2--N) accumulated partial-denitrification (PD) and anammox in a continuously fed upflow anaerobic sludge blanket (UASB) reactor was verified for simultaneous nitrate (NO3--N) and ammonia (NH4+-N) removal. A 225-days operation demonstrated that the relatively low total nitrogen (TN) concentration of 6.56 mg/L in effluent could be achieved with influent NH4+-N and NO3--N both of 30 mg/L, resulting in a high TN removal of 89.1% at 17.5 °C. Batch tests revealed that the NO3--N-to-NO2--N transformation ratio (NTR) of PD stabilized at 90% during the whole operation, which played a crucial role in the desirable performance. However, the PD and anammox activity was negatively impacted by the limited mass transfer with serious sludge flotation. Significantly, hydrodynamic mixing optimization by adjusting liquid recirculation ratio effectively enhanced the nitrogen removal. Moreover, protein composition and tightly-bound structure of EPS played an important role in the sludge stability.
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Affiliation(s)
- Rui Du
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Shenbin Cao
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Baikun Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Hanyu Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China
| | - Shuying Wang
- 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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Song L, Song Y, Li D, Liu R, Niu Q. The auto fluorescence characteristics, specific activity, and microbial community structure in batch tests of mono-chicken manure digestion. WASTE MANAGEMENT (NEW YORK, N.Y.) 2019; 83:57-67. [PMID: 30514471 DOI: 10.1016/j.wasman.2018.11.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 10/22/2018] [Accepted: 11/02/2018] [Indexed: 06/09/2023]
Abstract
Batch tests inoculated with granular and suspended sludge of mono chicken manure (CM) digestion were conducted. Kinetic analysis showed a maximum bio-CH4 generation (6 mL/gVS/d) at an optimal TS of 10-12%. At a TS of 25%, serious inhibition was found for granular sludge and even greater inhibition for the suspended sludge caused by free ammonia. The auto fluorescence of Excitation-mission matrix with parallel factor analysis (PARAFAC) showed that the dissolved organic matter (DOM) varied between the form C1, C2, C3 and C4. The split component of the SMP-like C2 and protein-like C4 significantly related to the bio-methane production in time series. The canonical correlation analysis (CCA) indicated that ammonia, pH, and TS influenced the PARAFAC component significantly. The aceticlastic methanogens of the genus Methanosaeta and acetogens of the genus Syntrophobacter predominated in the CM sludge. The methanogens and acetogens formed a metabolic cooperation, making the process a stable methane produced activity.
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Affiliation(s)
- Liuying Song
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Yong Song
- College of Agronomy, Liaocheng University, No.1 Hunan Road, Liaocheng, Shandong 252000, PR China
| | - Dunjie Li
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Rutao Liu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China
| | - Qigui Niu
- School of Environmental Science and Engineering, Shandong University, China-America CRC for Environment & Health, Shandong Province, 72# Jimo Binhai Road, Qingdao, Shandong 266237, PR China; Jiangsu Key Laboratory of Anaerobic Biotechnology (Jiangnan University), Wuxi 214122, PR China.
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Rincón Santamaría A, Cuellar Gil JA, Valencia Gil LF, Sánchez Toro OJ. Cinética de crecimiento de Gluconacetobacter diazotrophicus usando melaza de caña y sacarosa: evaluación de modelos. ACTA BIOLÓGICA COLOMBIANA 2019. [DOI: 10.15446/abc.v24n1.70857] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Gluconacetobacter diazotrophicus es una bacteria endófita promotora del crecimiento vegetal utilizada como inoculante microbiano en diferentes cultivos agrícolas. El objetivo del presente trabajo fue aplicar diferentes modelos matemáticos para representar su crecimiento en un cultivo sumergido por lotes empleando un biorreactor de 3 L y usando melazas de caña y sacarosa como fuente de energía. Se obtuvo el perfil temporal de pH, biomasa celular y azúcares totales. Se compararon los modelos estudiados por calidad de ajuste y complejidad y se realizó un análisis de sensibilidad paramétrica. Se consideraron modelos de cuatro y cinco parámetros con expresiones que incluyen efectos de inhibición por sustrato y por biomasa. El modelo con mayor calidad de ajuste fue el de Herbert-Pirt-Contois con coeficientes de determinación para biomasa y sustrato de 0,888 y 0,425 respectivamente. Estos valores indican una mayor correspondencia de los datos experimentales de biomasa con los datos calculados por el modelo, en comparación con los resultados obtenidos para azúcares totales para los que esta correspondencia fue menor. Este modelo generó la mejor combinación de calidad de ajuste y complejidad según el criterio de información de Akaike. El estudio cinético desarrollado permitió observar un comportamiento bifásico en la etapa de crecimiento de la bacteria cuando se cultiva en melaza y un efecto de limitación de su crecimiento por la biomasa. Los resultados obtenidos proporcionan una descripción matemática útil para el diseño, escalamiento y operación de un futuro proceso de producción de un inoculante microbiano a base de la bacteria G. diazotrophicus.
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Liu Y, Niu Q, Wang S, Ji J, Zhang Y, Yang M, Hojo T, Li YY. Upgrading of the symbiosis of Nitrosomanas and anammox bacteria in a novel single-stage partial nitritation-anammox system: Nitrogen removal potential and Microbial characterization. BIORESOURCE TECHNOLOGY 2017; 244:463-472. [PMID: 28803096 DOI: 10.1016/j.biortech.2017.07.156] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Revised: 07/24/2017] [Accepted: 07/26/2017] [Indexed: 06/07/2023]
Abstract
A novel single-stage partial nitritation-anammox process equipped with porous functional suspended carriers was developed at 25°C in a CSTR by controlling dissolved oxygen <0.3mg/L. The nitrogen removal performance was almost unchanged over a nitrogen loading rate ranging from 0.5 to 2.5kgNH4+-N/m3/d with a high nitrogen removal efficiency of 81.1%. The specific activity of AOB and anammox bacteria was of 3.00g-N/g-MLVSS/d (the suspended sludge), 3.56g-N/g-MLVSS/d (the biofilm sludge), respectively. The results of pyrosequencing revealed that Nitrosomonas (5.66%) and Candidatus_Kuenenia (4.95%) were symbiotic in carriers while Nitrosomonas (40.70%) was predominant in the suspended flocs. Besides, two specific types of heterotrophic filamentous bacteria in the suspended flocs (Haliscomenobacter) and the functional carrier biofilm (Longilinea) were shown to confer structural integrity to the aggregates. The novel single-stage partial nitritation-anammox process equipped with functional suspended carriers was shown to have good potential for the nitrogen-rich wastewater treatment.
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Affiliation(s)
- Yuan Liu
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Post Office Box 2871, Beijing 100085, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Sendai 980-8579, Japan; Tianjin Key Laboratory of Aquatic Science and Technology, 26# Jinjing Road, Tianjin 300384, China
| | - Qigui Niu
- School of Environmental Science and Engineering, Shandong University, 27# Shanda South Road, Jinan 250100, China
| | - Shaopo Wang
- Tianjin Key Laboratory of Aquatic Science and Technology, 26# Jinjing Road, Tianjin 300384, China; Tianjin Key laboratory of Aquatic Science and Technology, School of Environmental and Municipal Engineering, Tianjin Chengjian University, 26# Jinjing Road, Tianjin 300384, China
| | - Jiayuan Ji
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Sendai 980-8579, Japan
| | - Yu Zhang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Post Office Box 2871, Beijing 100085, China
| | - Min Yang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Post Office Box 2871, Beijing 100085, China
| | - Toshimasa Hojo
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Sendai 980-8579, Japan
| | - Yu-You Li
- Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aoba, Sendai 980-8579, Japan.
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12
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Effect of influent substrate ratio on anammox granular sludge: performance and kinetics. Biodegradation 2017; 28:437-452. [DOI: 10.1007/s10532-017-9807-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2017] [Accepted: 09/25/2017] [Indexed: 11/26/2022]
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13
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Lu X, Yin Z, Sobotka D, Wisniewski K, Czerwionka K, Xie L, Zhou Q, Makinia J. Modeling the pH effects on nitrogen removal in the anammox-enriched granular sludge. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2017; 75:378-386. [PMID: 28112665 DOI: 10.2166/wst.2016.530] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The aim of the study was to determine the pH effects on nitrogen removal in the anammox-enriched granular sludge. The experimental data were extracted from a 4 L completely-mixed batch reactor with the granular sludge at different initial pH values (6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5) and constant temperature T = 30 °C. Simulations were run in GPS-X 6.4 using a comprehensive mechanistic model Mantis2. Two kinetic parameters, the maximum specific growth rates of ammonia oxidizing bacteria (AOB) and anammox bacteria, were optimized at different pH scenarios. The inhibitory effects of the pH extremes on the anammox-enriched sludge were discussed in terms of the inhibition of free nitrous acid and free ammonia and metabolic mechanisms. Two different pH functions were used to examine the pH effects on the nitrogen removal kinetics. The pH optima for AOB and anammox bacteria were 7.4 and 7.6, respectively. The maximum specific growth rates of AOB and anammox bacteria at the pH optima were 0.81-0.85 d-1 and 0.36-0.38 d-1 (at T = 30 °C). The measured specific anammox activities (SAAs), predicted SAAs by Mantis2 and fitted SAAs by the Michaelis pH function at the pH optima were 0.895, 0.858 and 0.831 gN/(gVSS·d), respectively (VSS: volatile suspended solids).
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Affiliation(s)
- Xi Lu
- Institute of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Zhixuan Yin
- Institute of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Dominika Sobotka
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk 80-233, Poland
| | - Kamil Wisniewski
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk 80-233, Poland
| | - Krzysztof Czerwionka
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk 80-233, Poland
| | - Li Xie
- Institute of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Qi Zhou
- Institute of Environmental Science and Engineering, Tongji University, Shanghai 200092, China E-mail:
| | - Jacek Makinia
- Faculty of Civil and Environmental Engineering, Gdansk University of Technology, Gdansk 80-233, Poland
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