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Cui X, You J, Liao K, Ding L, Hu H, Ren H. Carbon Source in Tertiary Denitrification Regulates Dissolved Organic Nitrogen in Wastewater Effluent. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:4648-4661. [PMID: 38324528 DOI: 10.1021/acs.est.3c06554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
With global eutrophication and increasingly stringent nitrogen discharge restrictions, dissolved organic nitrogen (DON) holds considerable potential to upgrade advanced wastewater denitrification because of its large contribution to low-nitrogen effluents and stronger stimulation effect for algae. Here, we show that DON from the postdenitrification systems dominates effluent eutrophication potential under different carbon sources. Methanol resulted in significantly lower DON concentrations (0.84 ± 0.03 mg/L) compared with the total nitrogen removal-preferred acetate (1.11 ± 0.02 mg/L) (p < 0.05, ANOVA). With our well-developed mathematical model (R2 = 0.867-0.958), produced DON instead of shared (persist in both influent and effluent) and/or removed DON was identified as the key component for effluent DON variation (Pearson r = 0.992, p < 0.01). The partial least-squares path modeling analysis showed that it is the microbial community (r = 0.947, p < 0.01) rather than the predicted metabolic functions (r = 0.040, p > 0.1) that affected produced DON. Carbon sources rebuild the microorganism-DON interaction by affecting the structure of microbial communities with different abilities to generate and recapture produced DON to finally regulate effluent DON. This study revalues the importance of carbon source selection and overturns the current rationality of pursuing only the total nitrogen removal efficiency by emphasizing DON.
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Affiliation(s)
- Xian Cui
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, PR China
| | - Jiaqian You
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, PR China
| | - Kewei Liao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, PR China
| | - Lili Ding
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, PR China
| | - Haidong Hu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, PR China
| | - Hongqiang Ren
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu 210023, PR China
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Latif EF. Applying novel methods in conventional activated sludge plants to treat low-strength wastewater. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:323. [PMID: 35359231 PMCID: PMC8971158 DOI: 10.1007/s10661-022-09968-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Accepted: 03/19/2022] [Indexed: 06/14/2023]
Abstract
Conventional activated sludge system is confidently widely used for biological treatment plants of municipal wastewater but suffering from operation problems that affect their efficiencies and effluent qualities, especially when treating low-strength wastewater with increasing incoming flow. The objective of this study is to evaluate and compare the novel methods used in upgrading conventional activated sludge treatment systems receiving low-strength wastewater to generate good effluent quality. GPS-X Simulator V 8.0 was used for model calibration and plant performance prediction. The calibrated GPS-X model proved that eliminating primary settling from the treatment process does not affect BOD5 and COD removal, while TSS removal is decreased, and NH4-N removal is increased. Increasing the return activated sludge flow from 50 to 150% of influent flow does not affect conventional activated sludge process, while the change of waste activated flow had a vital effect on process performance. The presence of an anoxic zone in conventional activated sludge processes treating low-strength wastewater has no significant impact on plant performance. Also, the model outputs proved that adding filling media to the aeration tank was able to handle an increase of influent flow and a stable performance of BOD5, and NH4-N removal was observed.
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Affiliation(s)
- E F Latif
- Deptartment of Civil Engineering, Faculty of Engineering, Al-Azhar University, Cairo, Egypt.
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Jiang Z, Yang L, Hai Y, Hou L, Shen J. Synergistic denitrification and phosphorus removal performance of a biofilm-microflocculation system and its microbial community variations: A pilot-scale study for a wastewater treatment plant. J Appl Microbiol 2022; 132:4007-4017. [PMID: 35258152 DOI: 10.1111/jam.15513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 02/26/2022] [Accepted: 03/01/2022] [Indexed: 11/28/2022]
Abstract
AIMS For upgrading and reconstructing a municipal wastewater treatment plant, a biofilm-microflocculation filter system was designed and established towards synergistic improvement of denitrification and phosphorus removal from the secondary effluent. METHODS AND RESULTS The establishment of the biofilm-microflocculation filter system underwent several processes, including sludge inoculation, biofilm formation and polyaluminum chloride (PAC) addition as flocculating agent. Microbial community analysis indicated that the dominant denitrification bacteria of the biofilm filter were in the phylum Proteobacteria and the genera Hydrogenophaga and Dechloromonas. On the basis of the initiation of filter system under optimal parameters such as C/N ratio of 5.3, HRT of 1.06 h and PAC of 5 mg·L-1 , approximately 75% COD, 80% TN and 75% TP could be effectively removed to satisfy discharge standards. Comparing the variations of microbial community structure at the genus level during the operating period of the filter system, it was found that the relative abundance of denitrification bacteria merely shifted from 53.14% to 48.76%, demonstrating that the effect of PAC addition on the main microorganisms is marginal. CONCLUSIONS From the above results, it can be verified that the established biofilm-microflocculation filter system has practical and reliable performance for simultaneous biological denitrification and phosphorus removal. SIGNIFICANCE AND IMPACT OF STUDY This study provides a reference method for improving the advanced treatment of wastewater plant secondary effluent.
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Affiliation(s)
- Zhuwu Jiang
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian 350118, China
| | - Longbin Yang
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian 350118, China
| | - Yu Hai
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian 350118, China
| | - Lian Hou
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian 350118, China.,Design and Research Institute of Secondary Artillery, Beijing 100011, China
| | - Jyunhong Shen
- College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou, Fujian 350118, China
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Izadi P, Izadi P, Eldyasti A. Development of long-term dynamic BioWin® model simulation for ANAMMOX UASB micro-granular process. CHEMOSPHERE 2022; 286:131859. [PMID: 34416583 DOI: 10.1016/j.chemosphere.2021.131859] [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: 03/15/2021] [Revised: 08/06/2021] [Accepted: 08/08/2021] [Indexed: 06/13/2023]
Abstract
Three different innovative mathematical models were established to assess the volumetric nitrogen conversion rates of a lab-scale ANAMMOX upflow anaerobic sludge blanket reactor. Despite the vast technological and economical advantages of ANAMMOX, major challenges in process implementation call for mathematic simulations of the process, optimization of operating conditions, and kinetic/statistical analysis of the entire process. In this study, all developed mathematical models implemented via BioWin®, were calibrated and validated, with adequate representations of a bench-scale micro-granular ANAMMOX process, to understand the potential setbacks of ANAMMOX process start-up and stabilization. Fundamental calculations of the kinetic and stoichiometric constants were integrated in the BioWin® software, and the adjusted parameters based on experimental analysis were applied for the assessments. Based on the results from the statistical approach, one of the models (Model III) exhibited a precise prognosis of the effluent data for the entire operational phases with a mean relative error (MRE) of approximately 1.96, 4.36 and 2.54% for nitrogen removal efficiency, removal rate and loading rate, respectively. Evaluating alkalinity and pH during the operation, led to identifying an acceptable fit between the experiment and Model III results, with a MRE of -7.19 and -0.35%, correspondingly. This study confirms the reliability of ANAMMOX-based process modeling and high predictive ability with BioWin®. The presented simulation constants and modeling outline, can be further employed in full-scale applications design and development.
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Affiliation(s)
- Parin Izadi
- Lassonde School of Engineering, Civil Engineering, York University, 4700 Keele Street, Toronto, M3J 1P3, ON, Canada
| | - Parnian Izadi
- Lassonde School of Engineering, Civil Engineering, York University, 4700 Keele Street, Toronto, M3J 1P3, ON, Canada
| | - Ahmed Eldyasti
- Lassonde School of Engineering, Civil Engineering, York University, 4700 Keele Street, Toronto, M3J 1P3, ON, Canada.
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Huang S, Pooi CK, Shi X, Varjani S, Ng HY. Performance and process simulation of membrane bioreactor (MBR) treating petrochemical wastewater. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 747:141311. [PMID: 32791416 DOI: 10.1016/j.scitotenv.2020.141311] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 07/10/2020] [Accepted: 07/26/2020] [Indexed: 06/11/2023]
Abstract
Mathematical modelling of biological treatment is an effective tool to predict effluent quality. Model calibration is critical to improve the accuracy of simulation, which is normally carried out by fine-tuning the values of parameters according to the practical data. It indicated that huge amount of practical date will be consumed, and it cannot predict the treatment performance of new wastewater. In this study, the main objective was to investigate the feasibility of application BioWin software coupled with determination of sensitive parameters to predict the treatment performance of membrane biological reactors (MBRs) treating real petrochemical wastewater (PW). Model calibrations, i.e., COD fractions of petrochemical wastewater and kinetic parameters of biomass, were carried out using the respirometry method and the relationship between observed and true growth yield coefficients of the three lab-scale MBRs which were operated under different solid retention time (SRT). All the three MBRs had good organic and ammonium removal, with removal efficiencies higher than 80% and 99.9%, respectively. Simulation using the calibrated model also obtained good fit for effluent COD concentration, effluent nitrate concentration and bioreactor's MLSS concentration of all the three MBRs. The mean absolute percentage errors (MAPE) of the simulation mostly were lower than 22%. The results indicated that it is feasible to using BioWin, incorporated with appropriate determination methods of sensitive parameters, to simulate and monitor the treatment performance of MBR treating petrochemical wastewater. This is more time-saving and effective than fine-tuning values of all parameters. This study provides a valuable reference for simulation of industrial wastewater treatment using BioWin.
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Affiliation(s)
- Shujuan Huang
- Centre for Water Research, Department of Civil & Environmental Engineering, National University of Singapore, Faculty of Engineering, Block E1A, #07-03, 1 Engineering Drive 2, 117576, Singapore.
| | - Ching Kwek Pooi
- Centre for Water Research, Department of Civil & Environmental Engineering, National University of Singapore, Faculty of Engineering, Block E1A, #07-03, 1 Engineering Drive 2, 117576, Singapore.
| | - Xueqing Shi
- School of Environmental and Municipal Engineering, Qingdao University of Technology, 11 Fushun Road, Qingdao 266033, PR China
| | - Sunita Varjani
- Gujarat Pollution Control Board, Gandhinagar, Gujarat 382 010, India
| | - How Yong Ng
- Centre for Water Research, Department of Civil & Environmental Engineering, National University of Singapore, Faculty of Engineering, Block E1A, #07-03, 1 Engineering Drive 2, 117576, Singapore; NUS Environmental Research Institute, National University of Singapore, #02-01, T-Lab Building, 5A Engineering Drive 1, 117411, Singapore.
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Seco A, Ruano MV, Ruiz-Martinez A, Robles A, Barat R, Serralta J, Ferrer J. Plant-wide modelling in wastewater treatment: showcasing experiences using the Biological Nutrient Removal Model. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2020; 81:1700-1714. [PMID: 32644962 DOI: 10.2166/wst.2020.056] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Plant-wide modelling can be considered an appropriate approach to represent the current complexity in water resource recovery facilities, reproducing all known phenomena in the different process units. Nonetheless, novel processes and new treatment schemes are still being developed and need to be fully incorporated in these models. This work presents a short chronological overview of some of the most relevant plant-wide models for wastewater treatment, as well as the authors' experience in plant-wide modelling using the general model BNRM (Biological Nutrient Removal Model), illustrating the key role of general models (also known as supermodels) in the field of wastewater treatment, both for engineering and research.
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Affiliation(s)
- A Seco
- CALAGUA Unidad Mixta UV-UPV, Department of Chemical Engineering, School of Engineering, Universitat de València, Av. Universitat s/n, 46100 Burjassot, Spain E-mail:
| | - M V Ruano
- CALAGUA Unidad Mixta UV-UPV, Department of Chemical Engineering, School of Engineering, Universitat de València, Av. Universitat s/n, 46100 Burjassot, Spain E-mail:
| | - A Ruiz-Martinez
- CALAGUA Unidad Mixta UV-UPV, Department of Chemical Engineering, School of Engineering, Universitat de València, Av. Universitat s/n, 46100 Burjassot, Spain E-mail:
| | - A Robles
- CALAGUA Unidad Mixta UV-UPV, Department of Chemical Engineering, School of Engineering, Universitat de València, Av. Universitat s/n, 46100 Burjassot, Spain E-mail:
| | - R Barat
- CALAGUA Unidad Mixta UV-UPV, Research Institute of Water and Environmental Engineering, IIAMA, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - J Serralta
- CALAGUA Unidad Mixta UV-UPV, Research Institute of Water and Environmental Engineering, IIAMA, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
| | - J Ferrer
- CALAGUA Unidad Mixta UV-UPV, Research Institute of Water and Environmental Engineering, IIAMA, Universitat Politècnica de València, Camino de Vera s/n, 46022 Valencia, Spain
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Zheng X, Zhang S, Huang D, Zhang L, Zhang J. A pilot-scale deep bed denitrification filter for secondary effluent treatment using sodium acetate as external carbon. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:491-499. [PMID: 30791185 DOI: 10.1002/wer.1035] [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: 11/28/2018] [Revised: 12/08/2018] [Accepted: 12/10/2018] [Indexed: 06/09/2023]
Abstract
A pilot-scale quartz sand deep bed denitrification filter (DBDF) using sodium acetate as the additional carbon source was implemented to treat secondary effluent, with a high nitrate nitrogen (NO3 -N) concentration and low C/N ratio, from an urban municipal water resource recovery facility. By the 18th day, results showed that the removal efficiency of NO3 -N and the chemical oxygen demand (COD) were stable at above 85% and 70%, respectively. When the filter layer depth was set to 1,600 mm and the concentration of additional sodium acetate was maintained at 51 mg/L, the total nitrogen and COD concentrations of the DBDF effluent were stabilized below 5 and 30 mg/L, respectively. The quartz sand DBDF had a good effect on the removal of dissolved organic matter, especially for aromatic protein-like and tryptophan protein-like substances. Bacteria with denitrification function, such as Cloacibacterium and Zoogloea, became increasingly dominant with increasing filling layer depth. PRACTITIONER POINTS: The denitrification filter had a good effect on the removal of aromatic protein-like and tryptophan protein-like substances. Cloacibacterium and Zoogloea became increasingly dominant with increasing filling layer depth.
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Affiliation(s)
- Xiaowei Zheng
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Shenyao Zhang
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
| | - Deying Huang
- Department of Chemistry, Fudan University, Shanghai, China
| | - Liu Zhang
- Anhui Academy of Environmental Sciences, Hefei, China
| | - Jibiao Zhang
- Department of Environmental Science and Engineering, Fudan University, Shanghai, China
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