1
|
Mai W, Chen J, Liu H, Liang J, Tang J, Wei Y. Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment. Front Microbiol 2021; 12:746293. [PMID: 34733260 PMCID: PMC8560000 DOI: 10.3389/fmicb.2021.746293] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 08/27/2021] [Indexed: 11/13/2022] Open
Abstract
The discharge of excess nitrogenous pollutants in rivers or other water bodies often leads to serious ecological problems and results in the collapse of aquatic ecosystems. Nitrogenous pollutants are often derived from the inefficient treatment of industrial wastewater. The biological treatment of industrial wastewater for the removal of nitrogen pollution is a green and efficient strategy. In the initial stage of the nitrogen removal process, the nitrogenous pollutants are converted to ammonia. Traditionally, nitrification and denitrification processes have been used for nitrogen removal in industrial wastewater; while currently, more efficient processes, such as simultaneous nitrification-denitrification, partial nitrification-anammox, and partial denitrification-anammox processes, are used. The microorganisms participating in nitrogen pollutant removal processes are diverse, but information about them is limited. In this review, we summarize the microbiota participating in nitrogen removal processes, their pathways, and associated functional genes. We have also discussed the design of efficient industrial wastewater treatment processes for the removal of nitrogenous pollutants and the application of microbiome engineering technology and synthetic biology strategies in the modulation of the nitrogen removal process. This review thus provides insights that would help in improving the efficiency of nitrogen pollutant removal from industrial wastewater.
Collapse
Affiliation(s)
- Wenning Mai
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, China.,College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Jiamin Chen
- School of Ecology and Environment, Zhengzhou University, Zhengzhou, China.,Laboratory of Synthetic Biology, Zhengzhou University, Zhengzhou, China
| | - Hai Liu
- Henan Public Security Bureau, Zhengzhou, China
| | - Jiawei Liang
- College of Public Health, Zhengzhou University, Zhengzhou, China
| | - Jinfeng Tang
- Key Laboratory for Water Quality and Conservation of Pearl River Delta, Ministry of Education, School of Environmental Science and Engineering, Linköping University - Guangzhou University Research Center on Urban Sustainable Development, Guangzhou University, Guangzhou, China
| | - Yongjun Wei
- Laboratory of Synthetic Biology, Zhengzhou University, Zhengzhou, China.,Key Laboratory of Advanced Drug Preparation Technologies, Ministry of Education, School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China
| |
Collapse
|
2
|
Xiang Y, Chen Y, Luo S, Zou J, Zhang A. Degradation of recalcitrant organic matter in SAARB leachate by a combined process of coagulation and catalytic ozonation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:40219-40228. [PMID: 32661974 DOI: 10.1007/s11356-020-08292-4] [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: 10/12/2019] [Accepted: 03/02/2020] [Indexed: 06/11/2023]
Abstract
A combined coagulation and γ-Al2O3 catalytic ozonation process was used to treat semi-aerobic aged refuse biofilter (SAARB) effluent from treating mature landfill leachate. First, the coagulant providing the best pretreatment performance was selected. Then, the coagulated SAARB leachate was further treated in an optimized γ-Al2O3-catalyzed ozonation process. Characteristics of the γ-Al2O3-catalyzed ozonation process were determined, and a reaction mechanism was proposed. FeCl3 provided the best treatment efficiency (chemical oxygen demand (COD) removal of 65.8%, absorbance at 254 nm (UV254) removal of 68.55%, and color number (CN) removal of 79.4%). Under optimized O3 dosage (18.92 mg/min) and γ-Al2O3 dosage (10 g/L), efficiencies of removing COD, UV254, and CN were 54.3%, 82.9%, and 95.9%, respectively, at 30 min. In addition, spectral analysis indicated that fulvic-like substances in ultraviolet and visible regions were effectively degraded in the γ-Al2O3-O3 process and some smaller organic products were produced. Characterization of γ-Al2O3 showed that γ-Al2O3 was relative stable; its morphology and constituent elements did not change much after reaction. In addition, ozonation capacity was enhanced by heterogeneous catalytic effects of γ-Al2O3. The combined coagulation and γ-Al2O3 catalytic ozonation process was proven to be an efficient treatment method for removing bio-refractory organic matter contained in SAARB leachate.
Collapse
Affiliation(s)
- Yan Xiang
- Chengdu Textile College, Chengdu, 611731, China
| | - Yaping Chen
- Sichuan Academy of Eco-Environmental Science, Chengdu, 610041, China.
| | - Siqiang Luo
- Sichuan Province Environmental Protection Technology Engineering, Chengdu, 610041, China
| | - Junliang Zou
- Sichuan Province Environmental Protection Technology Engineering, Chengdu, 610041, China
| | - Aiping Zhang
- College of Chemistry and Material Science, Sichuan Normal University, Chengdu, 610068, China.
| |
Collapse
|
3
|
Chen W, He C, Gu Z, Wang F, Li Q. Molecular-level insights into the transformation mechanism for refractory organics in landfill leachate when using a combined semi-aerobic aged refuse biofilter and chemical oxidation process. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 741:140502. [PMID: 32887006 DOI: 10.1016/j.scitotenv.2020.140502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 06/22/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
Landfill leachate contains high concentrations of complex organic matter (OM) that can severely impact the ecological environment. If landfill leachate is to be treated using a combined "biological + advanced treatment" process, the molecular information of OM must be investigated to optimize the operation parameters of the combined process and maximize the removal of organic pollutants. This study applied ultra-high resolution mass spectroscopy to investigate the degradation and transformation characteristics of refractory OM in mature landfill leachate at the molecular level (m/z = 150-800) during biological treatment (i.e., semi-aerobic aged refuse biofilter, SAARB) and subsequent chemical oxidation (i.e., the Fenton process and ozonation). After SAARB treatment, the polycyclic aromatics (aromatic index, AI > 0.66) and polyphenol (0.66 ≥ AI > 0.50) contents increased, and the highly unsaturated phenolic compounds (AI ≤ 0.50 and H/C < 1.5), which have a high bioavailability, were mostly removed. Compared with raw leachate, SAARB effluent (i.e., SAARB leachate) contained fewer organics with short carbon chains, more organics with long carbon chains, an elevated condensation degree for organics and, thus, a considerably reduced biodegradability. Although both the Fenton and ozonation processes could remove many of the polycyclic aromatics and polyphenols, ozone produced considerable amounts of aliphatic compounds with high bioavailability. Compared to ozonation, the Fenton process utilized the hydroxyl radical to non-selectively react with OM and produced better mineralization results.
Collapse
Affiliation(s)
- Weiming Chen
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Chen He
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China
| | - Zhepei Gu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Fan Wang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China
| | - Qibin Li
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China.
| |
Collapse
|
4
|
Chen W, Wang F, Gu Z, Li Q. Recovery of efficient treatment performance in a semi-aerobic aged refuse biofilter when treating landfill leachate: Washing action using domestic sewage. CHEMOSPHERE 2020; 245:125618. [PMID: 31855749 DOI: 10.1016/j.chemosphere.2019.125618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Revised: 12/04/2019] [Accepted: 12/09/2019] [Indexed: 06/10/2023]
Abstract
Semi-aerobic aged refuse biofilters (SAARB) are known to efficiently remove organic matter, nitrogenous substances, and anions from landfill leachate. However, long-term recirculation of mature landfill leachate inevitably leads to accumulation of pollutants and decreases treatment capacity. In this study, the washing action provided by domestic sewage was used to recover and even enhance the treatment performance of SAARBs treating mature landfill leachate. Three SAARB columns were operated for 300 d after which a "Recirculation-Washing-Recirculation" sequence was followed. In the first recirculation period (22 d), removal of chemical oxygen demand (COD) and total nitrogen (TN) decreased from ca. 90% and 60%, respectively, initially to about 75% and less than 20%, respectively. Thereafter, washing (20 d) of the SAARBs was accomplished by applying domestic sewage. In the subsequent second recirculation period (30 d), the SAARBs were operated at the same hydraulic loading as used initially, but achieved high (ca. 90%) COD and relatively high (ca. 59%-76%) TN removal, including degradation of refractory organic matter such as humic- and fulvic-like substances. Overall, the mechanisms of the treatment performance recovery (including organics degradation and nitrification-denitrification) using domestic sewage can be attributed to three main effects: (1) some accumulated pollutants were washed out, thereby leading to recovery of the adsorption ability of aged refuse; (2) the inhibition of bio-refractory organics stress on microbial activities was mitigated by domestic sewage washing; and (3) the wash out of some accumulated salts (e.g., chloride and sulfate ions) probably helped the microbial activity recover.
Collapse
Affiliation(s)
- Weiming Chen
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China
| | - Fan Wang
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China
| | - Zhepei Gu
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China
| | - Qibin Li
- Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China.
| |
Collapse
|
5
|
Wei H, Wang X, Hassan M, Huang H, Xie B. Strategy of rapid start-up and the mechanism of de-nitrogen in landfill bioreactor. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 240:126-135. [PMID: 30928790 DOI: 10.1016/j.jenvman.2019.03.111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/20/2019] [Accepted: 03/24/2019] [Indexed: 06/09/2023]
Abstract
Nitrogen removal from landfill leachate via anaerobic ammonium oxidation (Anammox) process has been considered as an innovative and sustainable approach to the traditional nitrification and denitrification process. However, the various technologies for rapid start-up of Anammox are still being explored. In this study, two strategies (inoculating anaerobic sludge and without inoculation) were applied to treat landfill leachate based on biological nitrogen removal processes. The start-up and mechanism of de-nitrogen process in landfill bioreactor was explored using 15N stable isotopic tracing, quantitative polymerase chain reaction (qPCR) and high-throughput sequencing methods. Results showed that inoculating anaerobic sludge was beneficial to enhance the nitrogen removal at the initial stage (from day 10 to day 25), but no significant increase was found during days 25-55 (p > 0.05). 15N stable isotopic tracing demonstrated that the inoculation of sludge accelerated by denitrification other than Anammox. Inoculation of sludge was conducive to increase of ammonia-oxidizing bacteria (AOB)- amoA and niK genes. Thauera was the dominant genus for nitrogen removal due to inoculation of sludge in landfill bioreactor, whereas the abundance of Candidatus Kuenenia did not increase by inoculating the sludge. Moreover, seeding anaerobic sludge could not provide Anammox's ecological niches. The results will provide a scientific basis for the selection of suitable operational condition for the rapid start-up in the landfill bioreactor.
Collapse
Affiliation(s)
- Huawei Wei
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China
| | - Xiaoyuan Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China
| | - Muhammad Hassan
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, PR China
| | - Huang Huang
- Shanghai Laogang Wastes Disposal Co., Ltd, 2088 Nanbin Road, Shanghai, 201302, PR China
| | - Bing Xie
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, 200241, PR China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, 200092, PR China.
| |
Collapse
|
6
|
Feng F, Liu ZG, Song YX, Jiang CK, Chai XL, Tang CJ, Chai LY. The application of aged refuse in nitrification biofilter: Process performance and characterization. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 657:1227-1236. [PMID: 30677889 DOI: 10.1016/j.scitotenv.2018.12.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 10/11/2018] [Accepted: 12/03/2018] [Indexed: 06/09/2023]
Abstract
High adsorption capacity, good biocompatibility and low cost are highly demanded for biofilter used in ammonium-rich wastewater treatment. In this study, we used SEM, BET, XRD and 16S rRNA to document the evidence for good performance in adsorption and biodegradation in aged refuse. Parallel experiment between raw and inert refuse showed ammonium adsorption occurred at the initial week, with the highest ammonium removal efficiency of 90.36%, but saturated during the subsequent long-term operation. Meanwhile, over 6months' operation of an aged refuse biofilter was conducted to confirm that nitrification was the main pathway of ammonium conversion. The maximum nitrogen loading rate could reach up to as high as 1.28kg/m3/d, with ammonium removal efficiency at 99%. Further, high nitrifier biodiversity were detected with 'Nitrosomonas' and 'Nitrospira' in domination in the refuse. However, Nitrospira would outcompete Nitrosomonas under the oxygen limiting condition and resulted in the failure of partial nitrification. The physicochemical and biological analysis show that biodegradation is the main ammonium conversion pathway, which is the critical finding of this work. This investigation would help to accelerate the application of the aged refuse process in ammonium-rich wastewater treatment.
Collapse
Affiliation(s)
- Fan Feng
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Zhi-Gong Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Yu-Xia Song
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Chu-Kuan Jiang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| | - Xi-Lin Chai
- The Jiangxi Provincial Collaborative Research Institute for Environmental Protection Industry, Wannian 335500, China
| | - Chong-Jian Tang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China.
| | - Li-Yuan Chai
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China; Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Changsha, 410083, China
| |
Collapse
|
7
|
Meng J, Li J, Li J, Nan J, Deng K, Antwi P. Effect of temperature on nitrogen removal and biological mechanism in an up-flow microaerobic sludge reactor treating wastewater rich in ammonium and lack in carbon source. CHEMOSPHERE 2019; 216:186-194. [PMID: 30368083 DOI: 10.1016/j.chemosphere.2018.10.132] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 09/25/2018] [Accepted: 10/17/2018] [Indexed: 06/08/2023]
Abstract
Previous study has demonstrated that microaerobic process is effective in nitrogen removal from the wastewater with high ammonium and low carbon to nitrogen ratio. In the microaerobic system, synergistic action of anammox, ammonia oxidizing bacteria (AOB), nitrite oxidizing bacteria (NOB) and denitrifiers was the key issues to remove nitrogen from the wastewater rich in ammonium. Temperature has a significant effect on specific growth rate and activity of various nitrogen removal functional bacteria. In this study, the effect of temperature (35 °C-15 °C) on nitrogen removal were investigated in an up-flow microaerobic sludge reactor (UMSR) at the HRT of 8 h and reflux ratio of 45. Above 71.2% of total nitrogen (TN) and 80.7% of NH4+ removal efficiencies were observed at the temperature no less than 17 °C. With the temperature further decreasing to 15 °C, denitrifiers still dominant the UMSR, but AOB, NOB and Candidatus Brocadia as the predominant anammox bacteria were inhibited revealed by high throughput sequencing, resulting in the decrease of TN and NH4+ removal to 39.7% and 61.8%, respectively. Fortunately, when the temperature rebounded to 20 °C, a higher TN and NH4+ removal of 81.2% and 97.3% were obtained again in the UMSR.
Collapse
Affiliation(s)
- Jia Meng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China; Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia.
| | - Jiuling Li
- Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, QLD, 4072, Australia.
| | - Jianzheng Li
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
| | - Jun Nan
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
| | - Kaiwen Deng
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
| | - Philip Antwi
- School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, PR China; State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
| |
Collapse
|
8
|
Yao H, Li H, Xu J, Zuo L. Inhibitive effects of chlortetracycline on performance of the nitritation-anaerobic ammonium oxidation (anammox) process and strategies for recovery. J Environ Sci (China) 2018; 70:29-36. [PMID: 30037408 DOI: 10.1016/j.jes.2017.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 11/02/2017] [Accepted: 11/06/2017] [Indexed: 06/08/2023]
Abstract
The short- and long-term effects of chlortetracycline (CTC) on the nitritation- anaerobic ammonium oxidation (anammox) process were evaluated. The half maximal inhibitory concentration of CTC in the batch tests of the nitritation-anammox process was 278.91mg/L at an exposure time of 12hr. The long-term effects of CTC on the process were examined in a continuous-flow nitritation-anammox reactor. Within 14days, the nitrogen removal rate significantly decreased from 0.61 to 0.25kgN/m3/day with 60 mg/L CTC in the influent. The performance suppressed by CTC barely recovered, even after CTC was removed from the influent. Furthermore, the inhibition of CTC also reduced the relative abundance of ammonium oxidizing bacteria (AOB) and anaerobic ammonium oxidizing bacteria (AnAOB) in the reactor, resulting in both a decreased amount of and an imbalance between AOB and AnAOB. When fresh anammox sludge was reseeded into the nitritation-anammox reactor, the nitrogen removal rate recovered to 0.09 ± 0.03 kg N/m3/day.
Collapse
Affiliation(s)
- Hong Yao
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing 100044, China.
| | - Huayu Li
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing 100044, China
| | - Jing Xu
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing 100044, China
| | - Lushen Zuo
- Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard, Department of Municipal and Environmental Engineering, Beijing Jiaotong University, Beijing 100044, China
| |
Collapse
|
9
|
Hassan M, Wei H, Qiu H, Su Y, Jaafry SWH, Zhan L, Xie B. Power generation and pollutants removal from landfill leachate in microbial fuel cell: Variation and influence of anodic microbiomes. BIORESOURCE TECHNOLOGY 2018; 247:434-442. [PMID: 28965074 DOI: 10.1016/j.biortech.2017.09.124] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 09/15/2017] [Accepted: 09/17/2017] [Indexed: 06/07/2023]
Abstract
MFC was studied using young and old landfill leachate substrate to remove pollutants and produce renewable energy coupled with study of anodic microbiomes. The power output of 96.8mWm-2 with COD removal of 90.0±1.2% was achieved at 60% young leachate in batch mode, which decreased to 75mWm-2 having 55.5% COD abatement in continuous mode employing 100% young leachate. Power production using simulated wastewater without organic source proved that ammonium could also serve as fuel in MFC. The high ammonium dosage increased the overall system performance but beyond a certain limit, the inhibitory effect intensified. Nitrogen removal (66.0±3.3% NH4+-N and 86.0±0.1% NO2--N) occurred obeying different removal pathways. Sequencing analyses revealed that anammox bacteria (2%), denitrifying bacteria (5%) and electrogenic bacteria (15%) were in abundance of the microbial community in the anode. This technology can be promising for leachate treatment and power production however certain constraints still exist in pilot scale experiments.
Collapse
Affiliation(s)
- Muhammad Hassan
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China; Department of Environmental Science, Karakoram International University, Main KIU Road, Gilgit 15100, Pakistan
| | - Huawei Wei
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China
| | - Huijing Qiu
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China
| | - Yinglong Su
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China
| | - Syed Wajahat H Jaafry
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China
| | - Lu Zhan
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China
| | - Bing Xie
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China.
| |
Collapse
|
10
|
Zhang A, Chen W, Gu Z, Li Q, Shi G. Mechanism of adsorption of humic acid by modified aged refuse. RSC Adv 2018; 8:33642-33651. [PMID: 35548845 PMCID: PMC9086569 DOI: 10.1039/c8ra05933k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Accepted: 09/25/2018] [Indexed: 11/21/2022] Open
Abstract
In the present study, aged refuse (AR) was modified to be applied as an adsorbent to remove humic acid from water. The efficiency of humic acid removal by modified aged refuse (MAR) under different preparation conditions (calcination temperature, dose of aged refuse for calcination and holding time) was systematically investigated. Results showed that the optimum preparation conditions are calcination temperature = 700 °C, AR dose for calcination = 25 g, and holding time = 2.0 h. The characteristics of the modified aged refuse obtained under different calcination conditions were determined by Fourier transform infrared, X-ray diffraction and X-ray photoelectron spectroscopy analysis. In addition, the effects of modified aged refuse dose and initial solution pH on adsorption performance were studied. The removal of humic acid increased with higher doses of modified aged refuse, and weak alkaline (initial pH = 8.0) conditions were favorable for humic acid removal. A pseudo-second order model fitted the experimental data well. Moreover, the adsorption isotherms were well described by the Langmuir isotherm model, in which the monolayer surface loading was calculated to be approximately 37 mg g−1. During the adsorption process, the molecular weight, degree of condensation and aromaticity of humic acid were considerably decreased, according to 3D-EEM analysis. MAR as a new type of adsorbent thus provides a potential adsorption method for humic acid. In the present study, aged refuse (AR) was modified to be applied as an adsorbent to remove humic acid from water.![]()
Collapse
Affiliation(s)
- Aiping Zhang
- Key Laboratory of Special Wastewater Treatment of Collages of Sichuan Province
- College of Chemistry and Material Science of Sichuan Normal University
- Chengdu 610068
- China
- Laboratory of Development and Application of Rural Renewable Energy
| | - Weiming Chen
- Faculty of Geosciences and Environmental Engineering
- Southwest Jiaotong University
- Chengdu 611756
- China
| | - Zhepei Gu
- Key Laboratory of Special Wastewater Treatment of Collages of Sichuan Province
- College of Chemistry and Material Science of Sichuan Normal University
- Chengdu 610068
- China
| | - Qibin Li
- Key Laboratory of Special Wastewater Treatment of Collages of Sichuan Province
- College of Chemistry and Material Science of Sichuan Normal University
- Chengdu 610068
- China
- Faculty of Geosciences and Environmental Engineering
| | - Guozhong Shi
- Laboratory of Development and Application of Rural Renewable Energy
- Ministry of Agriculture
- Chengdu 610041
- China
- Biogas Institute of Ministry of Agriculture
| |
Collapse
|
11
|
He Y, Li D, Zhao Y, Huang M, Zhou G. Assessment and analysis of aged refuse as ammonium-removal media for the treatment of landfill leachate. WASTE MANAGEMENT & RESEARCH : THE JOURNAL OF THE INTERNATIONAL SOLID WASTES AND PUBLIC CLEANSING ASSOCIATION, ISWA 2017; 35:1168-1174. [PMID: 28956498 DOI: 10.1177/0734242x17730136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This is the first attempt to explore the sustainability of aged refuse as ammonium-removal media. Batch experiments combined with the aged-refuse-based reactor were performed to examine how the adsorption and desorption processes are involved in the ammonia removal via aged refuse media in this research. The results showed that the adsorption of ammonium by aged refuse occurred instantly and the adsorbed ammonium was stable and less exchangeable. The adsorption data fit the Freundlich isotherms well and the n value of 0.1-0.5 indicated that the adsorption of ammonium occurred easily. The maximum adsorbed ammonium occupied less than 10% of the cation exchange capacity in aged-refuse-based reactors owing to the high solid/liquid ratios (50:1-120:1). The synergistic transformations of ammonium within the aged-refuse-based reactor indicated that the cation exchange sites only provide temporary storage of ammonium, and the subsequent nitrification process can be considered the predominant restoration pathway of ammonium adsorption capacity of the reactor. It seems reasonable to assume that there is no expiry for the aged-refuse-based reactor in terms of ammonium removal owing to its bioregeneration via nitrification.
Collapse
Affiliation(s)
- Yan He
- 1 Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, China
| | - Dan Li
- 1 Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, China
| | - Youcai Zhao
- 2 The State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, China
| | - Minsheng Huang
- 1 Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai, China
| | - Gongming Zhou
- 2 The State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai, China
| |
Collapse
|
12
|
Wei H, Wang J, Hassan M, Han L, Xie B. Anaerobic ammonium oxidation-denitrification synergistic interaction of mature landfill leachate in aged refuse bioreactor: Variations and effects of microbial community structures. BIORESOURCE TECHNOLOGY 2017; 243:1149-1158. [PMID: 28764129 DOI: 10.1016/j.biortech.2017.07.077] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Revised: 07/13/2017] [Accepted: 07/14/2017] [Indexed: 06/07/2023]
Abstract
In this work, anammox-denitrification process was verified by 15N stable isotopic tracing methods and variations and effects of microbial community structures were studied using Illumina MiSeq sequencing and Quantitative Polymerase Chain Reaction (qPCR). The results showed that higher nitrogen removal efficiency and richer microbial consortia was observed at hydraulic loading rate (HLR) of 15L/m3·d, BOD5/TN ratio of 0.4:1, respectively. Proteobacteria, Chloroflexi, Acidobacteria and Firmicutes were the dominant phyla in the anamox-denitrification biomass. The number of amx gene changed significantly during the HLR downshift and BOD5/TN ratio upshift period. The obtained results enhance understanding regarding the microbial community structures of anammox-denitrification bacteria in aged refuse, leading to a more effective controlling of anammox-denitrification process.
Collapse
Affiliation(s)
- Huawei Wei
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Science, East China Normal University, 500 Dong Chuan Road, Shanghai 200241, PR China
| | - Jie Wang
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Science, East China Normal University, 500 Dong Chuan Road, Shanghai 200241, PR China
| | - Muhammad Hassan
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Science, East China Normal University, 500 Dong Chuan Road, Shanghai 200241, PR China
| | - Lu Han
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Science, East China Normal University, 500 Dong Chuan Road, Shanghai 200241, PR China
| | - Bing Xie
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, School of Ecological and Environmental Science, East China Normal University, 500 Dong Chuan Road, Shanghai 200241, PR China.
| |
Collapse
|
13
|
Sun X, Zhang H, Cheng Z. Use of bioreactor landfill for nitrogen removal to enhance methane production through ex situ simultaneous nitrification-denitrification and in situ denitrification. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 66:97-102. [PMID: 28433507 DOI: 10.1016/j.wasman.2017.04.020] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 03/20/2017] [Accepted: 04/07/2017] [Indexed: 06/07/2023]
Abstract
High concentrations of nitrate-nitrogen (NO3--N) derived from ex situ nitrification phase can inhibit methane production during ex situ nitrification and in situ denitrification bioreactor landfill. A combined process comprised of ex situ simultaneous nitrification-denitrification (SND) in an aged refuse bioreactor (ARB) and in situ denitrification in a fresh refuse bioreactor (FRB) was conducted to reduce the negative effect of high concentrationsof NO3--N. Ex situ SND can be achieved because NO3--N concentration can be reduced and the removal rate of ammonium-nitrogen (NH4+-N) remains largely unchanged when the ventilation rate of ARB-A2 is controlled. The average NO3--N concentrations of effluent were 470mg/L in ex situ nitrification ARB-A1 and 186mg/L in ex situ SND ARB-A2. The average NH4+-N removal rates of ARB-A1 and ARB-A2 were 98% and 94%, respectively. Based on the experimental data from week 4 to week 30, it is predicted that NH4+-N concentration in FRB-F1 of the ex situ nitrification and in situ denitrification process would reach 25mg/L after 63weeks, and about 40weeks for the FRB-F2 of ex situ SND and in situ denitrification process . Ex situ SND and in situ denitrification process can improve themethane production of FRB-F2. The lag phase time of methane production for the FRB-F2 was 11weeks. This phase was significantly shorter than the 15-week phases of FRB-F1 in ex situ nitrification and in situ denitrification process. A seven-week stabilizationphase was required to increase methane content from 5% to 50% for FRB-F2. Methane content in FRB-F1 did not reach 50% but reached the 45% peak after 20weeks.
Collapse
Affiliation(s)
- Xiaojie Sun
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China.
| | - Hongxia Zhang
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
| | - Zhaowen Cheng
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
| |
Collapse
|
14
|
Su Y, Wang J, Huang Z, Xie B. On-site removal of antibiotics and antibiotic resistance genes from leachate by aged refuse bioreactor: Effects of microbial community and operational parameters. CHEMOSPHERE 2017; 178:486-495. [PMID: 28347912 DOI: 10.1016/j.chemosphere.2017.03.063] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 03/04/2017] [Accepted: 03/15/2017] [Indexed: 06/06/2023]
Abstract
The abuse of antibiotics has raised the prevalence of antibiotic resistance, which will pose potential risk to human health. Leachate, generated during the landfill treatment of municipal solid waste, is the important hotspot of the antibiotics and antibiotic resistance genes (ARGs), and no effective on-site treatment has been put forward for preventing ARGs dissemination. Herein, the aged refuse bioreactor was employed to remove antibiotics and ARGs from leachate, and the great removal performance was observed. For the detected antibiotics, the total removal efficiency was about 76.75%, and sulfanilamide and macrolide were removed with high efficiencies (>80%). Among the target ARGs, tetracycline and macrolide resistance genes (tetM, tetQ and ermB) were eliminated with 1.2-2.0 orders of magnitude. The occurrences of ARGs did not correlated with water quality parameters such as COD, total nitrogen, ammonia, nitrate and nitrite, but closely linked to the variations of the bacterial community structure. Redundancy analysis (RDA) indicated the significant correlations between four genera and the distribution of ARGs, which implied that these key genera (including potential pathogens) drove the ARGs removal. Furthermore, the hydraulic loading test confirmed that the aged refuse bioreactor was capable of achieving high removal efficiencies even under shock loading for the higher loading was negative for the proliferations of potential ARGs hosts. This study suggested that aged refuse bioreactor could be a promising way for antibiotics and ARGs on-site removal from leachate.
Collapse
Affiliation(s)
- Yinglong Su
- Key Laboratory for Urban and Ecological Restoration of Shanghai, School of Ecology and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Jiaxin Wang
- Key Laboratory for Urban and Ecological Restoration of Shanghai, School of Ecology and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Zhiting Huang
- Key Laboratory for Urban and Ecological Restoration of Shanghai, School of Ecology and Environmental Sciences, East China Normal University, Shanghai 200241, China
| | - Bing Xie
- Key Laboratory for Urban and Ecological Restoration of Shanghai, School of Ecology and Environmental Sciences, East China Normal University, Shanghai 200241, China.
| |
Collapse
|
15
|
Sun X, Zhang H, Cheng Z, Wang S. Effect of low aeration rate on simultaneous nitrification and denitrification in an intermittent aeration aged refuse bioreactor treating leachate. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 63:410-416. [PMID: 28089204 DOI: 10.1016/j.wasman.2016.12.042] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 12/30/2016] [Accepted: 12/30/2016] [Indexed: 06/06/2023]
Abstract
Three intermittent aeration aged refuse bioreactors (ARBs), A, B, and C, with aeration rates of 670, 1340, and 2010L/m3 aged refuse·d in stage 1, and 670, 503, and 335L/m3 aged refuse·d in stage 2 were constructed to evaluate the effect of low aeration rate on leachate treatment by simultaneous nitrification and denitrification (SND). Results show that SND can be achieved and improved by reasonably adjusting the aeration rate of the ARB. In stage 1, the average chemical oxygen demand (COD) removal rates of ARBs A, B, and C were 91%, 92%, and 93%, respectively. The ammonia nitrogen (NH4+-N) removal rate of the three ARBs approached 100%. The total nitrogen (TN) average removal rates were 68%, 59%, and 57%. The average SND efficiency values were 73%, 66%, and 65%. In stage 2, the COD removal rates of ARBs A, B, and C decreased from the original values of 85%, 92%, and 93% to 84%, 81%, and 80%. The NH4+-N removal rate decreased from above 99% to 90%-92% in ARB B and from above 99% to 87%-91% in ARB C. The TN removal rates of ARBs B and C increased to 59% and 53% on day 15 from the initial values of 49% and 43% and were maintained at 49%-61% and 50%-60%. The SND efficiency of ARBs B and C improved, and the average values were 68% and 70% after day 15. These values were higher than the 66% of ARB A during the same period. Comprehensively considering the COD, NH4+-N, TN removal rate, and SND efficiency, the optimal aeration rate of 670L/m3 aged refuse·d is therefore suggested in this study.
Collapse
Affiliation(s)
- Xiaojie Sun
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China.
| | - Hongxia Zhang
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
| | - Zhaowen Cheng
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
| | - Siming Wang
- Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China; Guangxi Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology, Guilin 541004, China
| |
Collapse
|
16
|
Hassan M, Wang X, Wang F, Wu D, Hussain A, Xie B. Coupling ARB-based biological and photochemical (UV/TiO 2 and UV/S 2O 82-) techniques to deal with sanitary landfill leachate. WASTE MANAGEMENT (NEW YORK, N.Y.) 2017; 63:292-298. [PMID: 27633719 DOI: 10.1016/j.wasman.2016.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 09/05/2016] [Accepted: 09/06/2016] [Indexed: 06/06/2023]
Abstract
The aim of this study was to provide an alternative way to remove bio-refractory organics and ammonical-nitrogen from mature municipal solid waste (MSW) landfill leachate by combining biological and photochemical processes. To achieve this objective, the effectiveness of anoxic aged refuse-based bioreactor (ARB) for biological leachate pretreatment followed by Advanced Oxidation Processes (AOPs) by heterogeneous photocatalysis (TiO2/UV) and persulfate (S2O82-) oxidation were tested. The results obtained after ARB based pre-treatment demonstrated a mean 72%, 81% and 92% degradation of COD, NH4N and TN, respectively. However, this treated leachate cannot be discharged without another treatment; hence, it was further treated by UV-mediated TiO2 photocatalysis and S2O82- oxidation. An average 82% of COD was abated at optimum condition (1gL-1 TiO2; pH 5) whereas, using an optimum 1.5gL-1 persulfate at pH 5, 81% COD reduction occurred. Acidic and alkaline pH favored COD and NH4N removal respectively. The results of this study demonstrated that coupling ARB with AOPs is potentially applicable process to deal with bio-recalcitrant compounds present in mature landfill leachate.
Collapse
Affiliation(s)
- Muhammad Hassan
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, PR China
| | - Xiaoyuan Wang
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, PR China
| | - Fei Wang
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, PR China
| | - Dong Wu
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, PR China
| | - Asif Hussain
- School of Environmental Science and Engineering, Donghua University, Shanghai 200051, PR China
| | - Bing Xie
- Shanghai Key Laboratory for Urban Ecological Process and Eco-Restoration, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, PR China.
| |
Collapse
|
17
|
Wang X, Xie B, Zhang C, Shen Y, Lu J. Quantitative impact of influent characteristics on nitrogen removal via anammox and denitrification in a landfill bioreactor case. BIORESOURCE TECHNOLOGY 2017; 224:130-139. [PMID: 27916499 DOI: 10.1016/j.biortech.2016.11.078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/16/2016] [Accepted: 11/19/2016] [Indexed: 06/06/2023]
Abstract
In this paper, Quantitative Polymerase Chain Reaction (qPCR), Illumina MiSeq sequencing and 15N stable isotopic tracing methods were applied to study the effects of influent organic loading, BOD5/TN and NO2-N/NH4-N ratios on the combined nitrogen removal through denitrification and anammox. The results show that, the total nitrogen removal was above 90% at the optimum reaction condition: organic loading 0.04kg/m3·day, BOD5/TN 0.2, and NO2-N/NH4-N 1.0. Approximately 9.43% of the nitrogen removal occurred through anammox process when BOD5/TN was 0.1, and increased to 21.46% when BOD5/TN was 0.2. The anammox accounted for 10% when NO2-N/NH4-N was 0.5, and that increased to 20.72% when NO2-N/NH4-N was 1.0-1.5. hzsA was directly proportional to the influent BOD5/TN. A positive correlation between BOD5/TN and anammox microorganisms existed. Similarly, there was a positive correlation between NO2-N/NH4-N and denitrification microorganisms. Therefore, it is feasible to regulate the influent to improve nitrogen removal efficiency.
Collapse
Affiliation(s)
- Xiaoyuan Wang
- Key Laboratory of Urbanization and Ecological Restoration of Shanghai, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China
| | - Bing Xie
- Key Laboratory of Urbanization and Ecological Restoration of Shanghai, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China.
| | - Chaoqun Zhang
- Key Laboratory of Urbanization and Ecological Restoration of Shanghai, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China
| | - Yiwen Shen
- Key Laboratory of Urbanization and Ecological Restoration of Shanghai, School of Ecology & Environmental Science, East China Normal University, Shanghai 200241, China
| | - Jun Lu
- School of Science and School of Interprofessional Health Studies, Faculty of Health and Environmental Sciences, Auckland University of Technology, Auckland 1142, New Zealand; Institute of Biomedical Technology, Auckland University of Technology, Auckland 1142, New Zealand
| |
Collapse
|
18
|
Li J, Meng J, Li J, Wang C, Deng K, Sun K, Buelna G. The effect and biological mechanism of COD/TN ratio on nitrogen removal in a novel upflow microaerobic sludge reactor treating manure-free piggery wastewater. BIORESOURCE TECHNOLOGY 2016; 209:360-368. [PMID: 26972024 DOI: 10.1016/j.biortech.2016.03.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 02/28/2016] [Accepted: 03/01/2016] [Indexed: 06/05/2023]
Abstract
A novel upflow microaerobic sludge reactor (UMSR) was constructed to treat manure-free piggery wastewater with high NH4(+)-N concentration and low COD/TN ratio, and the effect and biological mechanism of COD/TN ratio on nitrogen removal were investigated at a constant hydraulic retention time of 8h and 35°C. The results showed that the UMSR could treat the wastewater with a better synchronous removal of COD, NH4(+)-N and TN. The microaerobic UMSR allowed nitrifiers, and heterotrophic and autotrophic denitrifiers to thrive in the flocs, revealing a multiple nitrogen removal mechanism in the reactor. Both the nitrifiers and denitrifiers would be restricted by an influent COD/TN ratio more than 0.82, resulting in a decrease of TN removal in the UMSR. To get a TN removal over 80% with a TN load removal above 0.86kg/(m(3)·d) in the UMSR, the influent COD/TN ratio should be less than 0.70.
Collapse
Affiliation(s)
- Jianzheng Li
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
| | - Jia Meng
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China
| | - Jiuling Li
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China
| | - Cheng Wang
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China
| | - Kaiwen Deng
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China
| | - Kai Sun
- State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China
| | - Gerardo Buelna
- Centre de Recherche Industrielle du Québec, 333 Franquet, Québec G1P 4C7, Canada
| |
Collapse
|
19
|
Hu Y, He F, Ma L, Zhang Y, Wu Z. Microbial nitrogen removal pathways in integrated vertical-flow constructed wetland systems. BIORESOURCE TECHNOLOGY 2016; 207:339-345. [PMID: 26897412 DOI: 10.1016/j.biortech.2016.01.106] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 01/25/2016] [Accepted: 01/28/2016] [Indexed: 06/05/2023]
Abstract
Microbial nitrogen (N) removal pathways in planted (Canna indica L.) and unplanted integrated vertical-flow constructed wetland systems (IVCWs) were investigated. Results of, molecular biological and isotope pairing experiments showed that nitrifying, anammox, and denitrifying bacteria were distributed in both down-flow and up-flow columns of the IVCWs. Further, the N transforming bacteria in the planted IVCWs were significantly higher than that in the unplanted ones (p<0.05). Moreover, the potential nitrification, anammox, and denitrification rates were highest (18.90, 11.75, and 7.84nmolNg(-1)h(-1), respectively) in the down-flow column of the planted IVCWs. Significant correlations between these potential rates and the absolute abundance of N transformation genes further confirmed the existence of simultaneous nitrification, anammox, and denitrification (SNAD) processes in the IVCWs. The anammox process was the major N removal pathway (55.6-60.0%) in the IVCWs. The results will further our understanding of the microbial N removal mechanisms in IVCWs.
Collapse
Affiliation(s)
- Yun Hu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Feng He
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
| | - Lin Ma
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Yi Zhang
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Zhenbin Wu
- State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| |
Collapse
|
20
|
Zhang L, Zhang S, Peng Y, Han X, Gan Y. Nitrogen removal performance and microbial distribution in pilot- and full-scale integrated fixed-biofilm activated sludge reactors based on nitritation-anammox process. BIORESOURCE TECHNOLOGY 2015; 196:448-453. [PMID: 26278191 DOI: 10.1016/j.biortech.2015.07.090] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Revised: 07/21/2015] [Accepted: 07/23/2015] [Indexed: 06/04/2023]
Abstract
Nitritation-anammox process was successfully established in pilot- and full-scale integrated fixed-film activated sludge (IFAS) reactors. An average nitrogen removal efficiency of 80% was achieved under ammonium loading rate of 0.7-1.3kgN/(m(3)d) in the pilot-scale reactor (12m(3)). Moreover, molecular analysis showed that ammonium oxidizing bacteria (AOB) were more abundant in the activated sludge while anammox bacteria were primarily located in the biofilm. The segregation of AOB and anammox bacteria enhanced the nitrogen removal rate and operational stability. Furthermore, a full-scale IFAS reactor of 500m(3) was set-up to treat sludge dewatering liquors. An average nitrogen removal efficiency of 85% and a nitrogen removal rate of 0.48kgN/(m(3)d) were achieved after inoculation. It was noted that high influent suspended solids would seriously affect the performance of the IFAS system. Therefore, a pre-treatment was proposed to reduce suspended solid in the full-scale application.
Collapse
Affiliation(s)
- Liang Zhang
- Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing, China; Beijing Drainage Group Co. Ltd (BDG), Beijing, China
| | - Shujun Zhang
- Beijing Drainage Group Co. Ltd (BDG), Beijing, China
| | - Yongzhen Peng
- Key Laboratory of Beijing Water Quality Science and Water Environment Recovery Engineering, Beijing, China.
| | - Xiaoyu Han
- Beijing Drainage Group Co. Ltd (BDG), Beijing, China
| | - Yiping Gan
- Beijing Drainage Group Co. Ltd (BDG), Beijing, China
| |
Collapse
|
21
|
Perspective of harnessing energy from landfill leachate via microbial fuel cells: novel biofuels and electrogenic physiologies. Appl Microbiol Biotechnol 2015; 99:7827-36. [DOI: 10.1007/s00253-015-6857-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 07/14/2015] [Accepted: 07/16/2015] [Indexed: 10/23/2022]
|
22
|
Wang YN, Sun YJ, Wang L, Sun XJ, Wu H, Bian RX, Li JJ. N₂O emission from a combined ex-situ nitrification and in-situ denitrification bioreactor landfill. WASTE MANAGEMENT (NEW YORK, N.Y.) 2014; 34:2209-2217. [PMID: 25062936 DOI: 10.1016/j.wasman.2014.06.023] [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: 03/19/2014] [Revised: 06/09/2014] [Accepted: 06/21/2014] [Indexed: 06/03/2023]
Abstract
A combined process comprised of ex-situ nitrification in an aged refuse bioreactor (designated as A bioreactor) and in-situ denitrification in a fresh refuse bioreactor (designated as F bioreactor) was constructed for investigating N2O emission during the stabilization of municipal solid waste (MSW). The results showed that N2O concentration in the F bioreactor varied from undetectable to about 130 ppm, while it was much higher in the A bioreactor with the concentration varying from undetectable to about 900 ppm. The greatly differences of continuous monitoring of N2O emission after leachate cross recirculation in each period were primarily attributed to the stabilization degree of MSW. Moreover, the variation of N2O concentration was closely related to the leachate quality in both bioreactors and it was mainly affected by the COD and COD/TN ratio of leachate from the F bioreactor, as well as the DO, ORP, and NO3(-)-N of leachate from the A bioreactor.
Collapse
Affiliation(s)
- Ya-nan Wang
- School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China; School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033, China
| | - Ying-jie Sun
- School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033, China.
| | - Lei Wang
- School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xiao-jie Sun
- College of Environmental Science and Engineering, Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology, Guilin 541004, China
| | - Hao Wu
- Sanlihe Subdistrict Office, Jiaozhou, Qingdao 266033, China
| | - Rong-xing Bian
- School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033, China
| | - Jing-jing Li
- School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033, China
| |
Collapse
|
23
|
Hassan M, Xie B. Use of aged refuse-based bioreactor/biofilter for landfill leachate treatment. Appl Microbiol Biotechnol 2014; 98:6543-53. [DOI: 10.1007/s00253-014-5813-5] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2014] [Revised: 05/01/2014] [Accepted: 05/02/2014] [Indexed: 11/28/2022]
|