1
|
Bahreini G, Elbahrawi M, Elbeshbishy E, Santoro D, Nakhla G. Biological nutrient removal enhancement using fermented primary and rotating belt filter biosolids. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 796:148947. [PMID: 34273832 DOI: 10.1016/j.scitotenv.2021.148947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/06/2021] [Accepted: 07/06/2021] [Indexed: 06/13/2023]
Abstract
This research compared the impact of two primary treatment options (i.e. primary clarification and rotating belt filtration (RBF)) on biological nutrients removal (BNR) process, using sludge fermentation liquid (SFL) as a carbon source. The liquid fraction of both fermented primary and RBF sludges comparably enhanced BNR. Despite the significant contribution of the unpurified SFL to the sharp increase in nutrient levels; i.e. 47%-64% (primary effluent; PE), and 45%-53% (RBF) of the soluble nitrogen and phosphorus loads; readily biodegradable COD and volatile fatty acids (VFAs) fractions of the combined feed increased significantly (2.5-6.1 times), compared to the original feed by additional SFL. Removal efficiencies in the reactors reached 57% (total nitrogen) and 92% (total phosphorus) after addition of SFL. Effluent nitrogen and phosphorus of the two reactors were close in the range of 15 ± 6 mg N/L, and 0.5 ± 0.3 mg P/L, respectively. Kinetics studies showed denitrification rates of 1.3, and 1.13 kg NO3-N/m3.d for primary effluent and RBF effluent-fed reactors, respectively. Phosphorus release rates were 11.7 and 9.7 mg PO4-P/g VSS.h, for primary, and RBF effluents, respectively; showing 20%-22% lower rates in the RBF SFL. Incorporating experimental data into a plant-wide model for a 100 MLD facility receiving typical medium strength wastewater, showed that although primary treatment enhanced the biogas production by 96% (primary clarification) and 62% (RBF) trains; combined fermentation and anaerobic digestion was effective to enhance the biogas production by 59% on average, compared to the base scenario without primary treatment. Additionally, if primary clarification exists, then the addition of fermentation results in additional revenue of C$1890/d in the plant, considering additional revenue of C$2230/d due to VFA generation in contrast to only C$340/d loss due to the reduced methane production.
Collapse
Affiliation(s)
- Gholamreza Bahreini
- Department of Civil and Environmental Engineering, Western University, London, ON N6A 5B9, Canada.
| | - Moustafa Elbahrawi
- Department of Civil and Environmental Engineering, Western University, London, ON N6A 5B9, Canada
| | - Elsayed Elbeshbishy
- Civil Engineering Department, Ryerson University, Toronto, ON M5B 2K3, Canada
| | | | - George Nakhla
- Department of Civil and Environmental Engineering, Western University, London, ON N6A 5B9, Canada; Department of Chemical and Biochemical Engineering, Western University, London, ON N6A 5B9, Canada
| |
Collapse
|
2
|
Nie Z, Huo M, Wang F, Ai S, Sun X, Zhu S, Li Q, Bian D. Pilot study on urban sewage treatment with micro pressure swirl reactor. BIORESOURCE TECHNOLOGY 2021; 320:124305. [PMID: 33189044 DOI: 10.1016/j.biortech.2020.124305] [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: 08/20/2020] [Revised: 10/17/2020] [Accepted: 10/19/2020] [Indexed: 06/11/2023]
Abstract
This study aimed to propose a new type of micro-pressure swirl reactor (MPSR) to treat urban sewage. The MPSR could form a stable swirl in the reactor, and realized the coexistence of anaerobic, anoxic, and aerobic zones in a single aeration tank. The pilot study showed that MPSR achieved high removal efficient of SS, COD, NH4+-N, TN, TP under the conditions of drastic fluctuation in influent quality and temperature, and the average removal rate were 88.58%, 93.32%, 94.47%, 73.19%, 96.16%. The relative high abundance of Thermomonas, Thaurea, and Dechloromonas, etc, guaranteed the denitrification efficiency of the MPSR, and Dechloromonas was the main phosphorus removal bacteria in the system. The study confirmed the rationality of the structural design of the MPSR, and it was excellent in sewage treatment and stability.
Collapse
Affiliation(s)
- Zebing Nie
- Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China; Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun, 130012 China
| | - Mingxin Huo
- Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China; Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun, 130012 China.
| | - Fan Wang
- Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun, 130012 China
| | - Shengshu Ai
- Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun, 130012 China; Key Laboratory of Groundwater Resources and Environment, Ministry of Education (Jilin University), Changchun 130021, China
| | - Xuejian Sun
- Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun, 130012 China
| | - Suiyi Zhu
- Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China; Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun, 130012 China
| | - Qingzhe Li
- Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun, 130012 China
| | - Dejun Bian
- Science and Technology Innovation Center for Municipal Wastewater Treatment and Water Quality Protection, Northeast Normal University, Changchun 130117, China; Key Laboratory of Urban Sewage Treatment of Jilin Province, Changchun Institute of Technology, Changchun, 130012 China
| |
Collapse
|
3
|
Gang H, Xiao C, Xiao Y, Yan W, Bai R, Ding R, Yang Z, Zhao F. Proteomic analysis of the reduction and resistance mechanisms of Shewanella oneidensis MR-1 under long-term hexavalent chromium stress. ENVIRONMENT INTERNATIONAL 2019; 127:94-102. [PMID: 30909098 DOI: 10.1016/j.envint.2019.03.016] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/25/2019] [Accepted: 03/07/2019] [Indexed: 06/09/2023]
Abstract
Hexavalent chromium [Cr(VI)] is a priority heavy metal pollutant causing a series of environmental issues, and bio-reduction of Cr(VI) to trivalent chromium can remarkably decrease the environmental risk of Cr(VI). The reduction and resistance abilities of microorganisms to Cr(VI) can be dramatically improved by acclimatization. In the present study, we collected Shewanella oneidensis MR-1 from a 120-day acclimatization by increasing Cr(VI) concentration in the culture media to investigate its adaptation mechanisms under long-term Cr(VI) stress at the proteome level. Tandem mass tag-based quantitative proteomic analysis was performed to study the differences between 9 collected samples. A total of 2500 proteins were quantified from 2723 identified protein groups. Bioinformatics analysis showed that the differentially expressed proteins after the 120-day Cr(VI) acclimatization were mostly related to flagellar assembly, ribosomes, transport, sulfur metabolism, and energy metabolism. The findings of this study present novel insights into the molecular mechanisms for the reduction and resistance of S. oneidensis MR-1 responding to long-term Cr(VI) stress at the proteome level.
Collapse
Affiliation(s)
- Haiyin Gang
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, College of Environmental Science and Engineering, Hunan University, Changsha 410082, China; CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Changye Xiao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yong Xiao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Weifu Yan
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Rui Bai
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rui Ding
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhaohui Yang
- Key Laboratory of Environmental Biology and Pollution Control, Ministry of Education, College of Environmental Science and Engineering, Hunan University, Changsha 410082, China.
| | - Feng Zhao
- CAS Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
4
|
Eco-Friendly Treatment Strategies for Wastewater Containing Dyes and Heavy Metals. ENERGY, ENVIRONMENT, AND SUSTAINABILITY 2018. [DOI: 10.1007/978-981-10-7332-8_14] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
5
|
Liu H, Chen Y, Wu J. Municipal wastewater biological nutrient removal driven by the fermentation liquid of dairy wastewater. ENVIRONMENTAL TECHNOLOGY 2017; 38:2639-2649. [PMID: 27966388 DOI: 10.1080/09593330.2016.1272638] [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: 06/06/2023]
Abstract
UNLABELLED Carbon substrate is required by biological nutrient removal (BNR) microorganism, but it is usually insufficient in the influent of many municipal wastewater treatment plants. In this study the use of ethanol-enriched fermentation liquid, which was derived from dairy wastewater, as the preferred carbon substrate of BNR was reported. First, the application of dairy wastewater and food processing wastewater and their fermentation liquid as the carbon substrate of BNR was compared in the short-term tests. The fermented wastewater showed higher BNR performance than the unfermented one, and the fermentation liquid of dairy wastewater (FL-DW), which was obtained under pH 8 and fermentation time of 6 day, exhibited the highest phosphorus (95.5%) and total nitrogen (97.6%) removal efficiencies due to its high ethanol content (57.9%). Then, the long-term performance of FL-DW acting as the carbon substrate of BNR was compared with that of acetate and ethanol, and the FL-DW showed the greatest phosphorus and total nitrogen removal. Further investigation showed that the use of FL-DW caused the highest polyhydroxyalkanoates (PHAs) synthesis in BNR microbial cells, and more PHAs were used for phosphorus uptake and denitrification rather than glycogen synthesis and microbial growth. The FL-DW can be used as a preferred carbon substrate for BNR microbes. ABBREVIATIONS AB: aerobic end sludge active biomass; BNR: biological nutrient removal; DW: dairy wastewater; FL-DW: fermentation liquid of dairy wastewater; FPW: food processing wastewater; FL-FPW: fermentation liquid of food processing wastewater; PHAs: polyhydroxyalkanoates; PHB: poly-3-hydroxybutyrate; PHV: poly-3-hydroxyvalerate; PH2MV: poly-3-hydroxy-2- methylvalerate; PAOs: phosphorus accumulating organisms; SBR: sequencing batch reactor; SOP: soluble ortho-phosphorus; TN: total nitrogen; TSS: total suspended solids; VSS: volatile suspended solids; VFAs: volatile fatty acids; WWTPs: wastewater treatment plants.
Collapse
Affiliation(s)
- Hui Liu
- a State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering , Tongji University , Shanghai , People's Republic of China
| | - Yinguang Chen
- a State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering , Tongji University , Shanghai , People's Republic of China
| | - Jiang Wu
- b College of Architecture and Urban Planning , Tongji University , Shanghai , People's Republic of China
| |
Collapse
|
6
|
Liu J, Yuan Y, Li B, Zhang Q, Wu L, Li X, Peng Y. Enhanced nitrogen and phosphorus removal from municipal wastewater in an anaerobic-aerobic-anoxic sequencing batch reactor with sludge fermentation products as carbon source. BIORESOURCE TECHNOLOGY 2017; 244:1158-1165. [PMID: 28869122 DOI: 10.1016/j.biortech.2017.08.055] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 08/04/2017] [Accepted: 08/09/2017] [Indexed: 06/07/2023]
Abstract
An anaerobic-aerobic-anoxic sequencing batch reactor (AOA-SBR) using sludge fermentation products as carbon source was developed to enhance nitrogen and phosphorus removal in municipal wastewater with low C/N ratio (<4) and reduce sludge production. The AOA-SBR achieved simultaneous partial nitrification and denitrification (SND), aerobic phosphorus uptake and anoxic denitrification through the real-time control and the addition of sludge fermentation products. The average removal efficiencies of total nitrogen (TN), phosphorus (PO43--P) and chemical oxygen demand (COD) after 145-day operation were 88.8%, 99.3% and 81.2%, respectively. Nitrite accumulation ratio (NAR) reached 99.1% and sludge reduction rate reached 44.1-52.1%. Specifically, 34.4% of the TN removal was carried out by SND and 57.5% by denitrification. Illumina MiSeq sequencing indicated that ammonium-oxidizing bacteria (Nitrosomonas) were enriched and nitrite-oxidizing bacteria (Nitrospira) did not exist in AOA-SBR. The system demonstrated potential to solve the dual problem of insufficient carbon source and sludge reduction.
Collapse
Affiliation(s)
- Jinjin Liu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yue Yuan
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR 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, PR China; Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Qiong Zhang
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Lei Wu
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Xiyao Li
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China
| | - Yongzhen Peng
- National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, PR China.
| |
Collapse
|
7
|
Podedworna J, Zubrowska-Sudol M, Sytek-Szmeichel K, Gnida A, Surmacz-Górska J, Marciocha D. Impact of multiple wastewater feedings on the efficiency of nutrient removal in an IFAS-MBSBBR: number of feedings vs. efficiency of nutrient removal. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2016; 74:1457-1468. [PMID: 27685975 DOI: 10.2166/wst.2016.331] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
This article presents the results of research into the influence of one, two and three wastewater feedings in a cycle on efficiency and performance of combined biological nitrogen and phosphorus removal in an integrated fixed-film activated sludge and moving-bed sequencing batch biofilm reactor (IFAS-MBSBBR). The experiment lasted 158 days and was conducted in two laboratory models of the IFAS-MBSBBR with an active volume of 28 L. It was found that along with an increase in the number of wastewater feedings, an increase in nitrogen removal efficiency was observed (from 56.9 ± 2.30% for a single feeding to 91.4 ± 1.77% for three feedings). Moreover, the contribution of simultaneous nitrification/denitrification in nitrogen removal increased (from 2.58% for a single feeding to 69.5% for three feedings). Systems with a greater number of feedings stimulated the process of denitrifying phosphorus removal. Regardless of the way in which wastewater feeding was applied to the IFAS-MBSBBR, highly efficient chemical oxygen demand (COD) removal (94.8 ± 1.80%) and biological phosphorus removal (98.9 ± 0.87%) were achieved.
Collapse
Affiliation(s)
- J Podedworna
- Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska Str. 20, Warsaw 00-653, Poland E-mail:
| | - M Zubrowska-Sudol
- Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska Str. 20, Warsaw 00-653, Poland E-mail:
| | - K Sytek-Szmeichel
- Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska Str. 20, Warsaw 00-653, Poland E-mail:
| | - A Gnida
- Faculty of Energy and Environmental Engineering, Environmental Biotechnology Department, Silesian University of Technology, Krzywoustego Str. 8, Gliwice 44-100, Poland
| | - J Surmacz-Górska
- Faculty of Energy and Environmental Engineering, Environmental Biotechnology Department, Silesian University of Technology, Akademicka Str. 2, Gliwice 44-100, Poland
| | - D Marciocha
- Faculty of Energy and Environmental Engineering, Environmental Biotechnology Department, Silesian University of Technology, Krzywoustego Str. 8, Gliwice 44-100, Poland
| |
Collapse
|
8
|
Mao Y, Wang Z, Li L, Jiang X, Zhang X, Ren H, Zhang T. Exploring the Shift in Structure and Function of Microbial Communities Performing Biological Phosphorus Removal. PLoS One 2016; 11:e0161506. [PMID: 27547976 PMCID: PMC4993488 DOI: 10.1371/journal.pone.0161506] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 08/05/2016] [Indexed: 01/26/2023] Open
Abstract
A sequencing batch reactor fed mainly by acetate was operated to perform enhanced biological phosphorus removal (EBPR). A short-term pH shock from 7.0 to 6.0 led to a complete loss of phosphate-removing capability and a drastic change of microbial communities. 16S rRNA gene pyrosequencing showed that large proportions of glycogen accumulating organisms (GAOs) (accounted for 16% of bacteria) bloomed, including Candidatus Competibacter phosphatis and Defluviicoccus-related tetrad-forming organism, causing deteriorated EBPR performance. The EBPR performance recovered with time and the dominant Candidatus Accumulibacter (Accumulibacter) clades shifted from Clade IIC to IIA while GAOs populations shrank significantly. The Accumulibacter population variation provided a good opportunity for genome binning using a bi-dimensional coverage method, and a genome of Accumulibacter Clade IIC was well retrieved with over 90% completeness. Comparative genomic analysis demonstrated that Accumulibacter clades had different abilities in nitrogen metabolism and carbon fixation, which shed light on enriching different Accumulibacter populations selectively.
Collapse
Affiliation(s)
- Yanping Mao
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, China
- Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Zhiping Wang
- Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Liguan Li
- Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Xiaotao Jiang
- Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Xuxiang Zhang
- School of Environment, Nanjing University, Nanjing, China
| | - Hongqiang Ren
- School of Environment, Nanjing University, Nanjing, China
| | - Tong Zhang
- Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong, China
- * E-mail:
| |
Collapse
|
9
|
Enhanced biological phosphorus removal with different carbon sources. Appl Microbiol Biotechnol 2016; 100:4735-45. [DOI: 10.1007/s00253-016-7518-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Revised: 03/26/2016] [Accepted: 03/30/2016] [Indexed: 10/21/2022]
|
10
|
Carvalheira M, Oehmen A, Carvalho G, Reis MAM. The effect of substrate competition on the metabolism of polyphosphate accumulating organisms (PAOs). WATER RESEARCH 2014; 64:149-159. [PMID: 25051162 DOI: 10.1016/j.watres.2014.07.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 06/24/2014] [Accepted: 07/03/2014] [Indexed: 06/03/2023]
Abstract
The type of carbon source present in the wastewater is one factor that affects the competition between polyphosphate accumulating organisms (PAO) and glycogen accumulating organisms (GAO) and therefore, the efficiency of the enhanced biological phosphorus removal (EBPR) process. This study investigated the impact of the carbon source composition on the anaerobic and aerobic kinetics of PAOs and the EBPR performance of an 85% PAO enrichment. When both acetate (HAc) and propionate (HPr) were present, propionate was depleted more quickly, with a constant uptake rate of 0.18 ± 0.02 C-mol/(C-mol biomass·h), while the acetate uptake rate decreased with an increase in propionate concentration, due to the substrate competition between acetate and propionate. The metabolic model for PAOs was modified to incorporate the anaerobic substrate competition effect. The aerobic rates for phosphorus (P) uptake, glycogen production and polyhydroxyalkanoates (PHA) degradation were within the same range for all tests, indicating that these rates are essentially independent of the acetate and propionate concentration, simplifying the calibration procedure for metabolic models. The metabolic model applied to describe the anaerobic and aerobic activity agreed well with the experimental data of HAc, HPr, P, PHA and biomass growth. The low glycogen consumption observed suggest that some reducing equivalents were generated anaerobically through the TCA cycle. The results of this work suggest that the propionate uptake kinetics by PAOs can provide them an advantage over GAOs in EBPR systems, even when the propionate fraction of the influent is relatively low.
Collapse
Affiliation(s)
- Mónica Carvalheira
- Requimte/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| | - Adrian Oehmen
- Requimte/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal.
| | - Gilda Carvalho
- Requimte/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal; Instituto de Biologia Experimental e Tecnológica (IBET), Av. da República (EAN), 2784-505 Oeiras, Portugal
| | - Maria A M Reis
- Requimte/CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Campus de Caparica, 2829-516 Caparica, Portugal
| |
Collapse
|
11
|
Tayà C, Garlapati VK, Guisasola A, Baeza JA. The selective role of nitrite in the PAO/GAO competition. CHEMOSPHERE 2013; 93:612-618. [PMID: 23845433 DOI: 10.1016/j.chemosphere.2013.06.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2013] [Revised: 06/04/2013] [Accepted: 06/05/2013] [Indexed: 06/02/2023]
Abstract
Proliferation of Glycogen Accumulating Organisms (GAOs) accounts as one of the major bottlenecks in biological phosphorus removal systems. GAO outcompeting polyphosphate accumulating organisms (PAOs) results in lower P-removal. Thus, finding optimal conditions that favour PAO in front of GAO is a current focus of research. This work shows how nitrite can provide a novel strategy for PAO enrichment. A propionate-fed GAO-enriched biomass (70% Defluviicoccus I, 18% Defluviicoccus II and 10% PAO) was subjected more than 50 d under anaerobic-anoxic conditions with nitrite as electron acceptor. These operational conditions led to a PAO-enriched sludge (85%) where GAO were washed out of the system (<10%), demonstrating the validity of the new approach for PAO enrichment. In addition, the presented suppression of Defluviicocus GAO with nitrite represents an add-on benefit to the nitrite-based systems since the proliferation of non-desirable GAO can be easily ruled out and added to the other benefits (i.e. lower aeration and COD requirements).
Collapse
Affiliation(s)
- Carlota Tayà
- Departament d'Enginyeria Química, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193 Bellaterra, Barcelona, Spain.
| | | | | | | |
Collapse
|
12
|
Yang YQ, Shen DS, Li N, Xu D, Long YY, Lu XY. Co-digestion of kitchen waste and fruit-vegetable waste by two-phase anaerobic digestion. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:2162-2171. [PMID: 23288673 DOI: 10.1007/s11356-012-1414-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Accepted: 12/09/2012] [Indexed: 06/01/2023]
Abstract
The high salinity and fat contents of kitchen waste (KW) inhibits the effect of two-phase anaerobic digestion system. This research introduces fruit-vegetable waste (FVW) to alleviate the inhibition effect caused by salinity and fat concentrations, and tries to achieve an optimal addition ratio of FVW, an optimal hydraulic remain time (HRT) of acidogenic-phase reactor and methanogenic-phase reactor. A two-phase anaerobic digestion (AD) system was developed to co-dispose KW and FVW. Four sets of experiments were run with different mass proportions between KW and FVW (25-75, 50-50, 75-25, and 100-0% m/m). Considering the biodegradation rate and the acidification degree, the system with 25% KW had the best performance during the acidogenic phase. When the system was run with 50% KW, it not only had the best stability performance but also had a bigger capacity to treat KW than the system with 25% KW. The system with 50% KW was the best ratio in this two-phase AD system. Co-digestion of KW and FVW by two-phase AD is feasible. The addition of FVW can reduce the inhibition effect caused by salinity and fat concentrations, reduce the HRT, and lead to a higher degree of acidification.
Collapse
Affiliation(s)
- Yu-Qiang Yang
- Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018, China
| | | | | | | | | | | |
Collapse
|
13
|
Comparison between aerobic and anoxic metabolism of denitrifying-EBPR sludge: effect of biomass poly-hydroxyalkanoates content. N Biotechnol 2013; 30:227-37. [DOI: 10.1016/j.nbt.2012.05.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2011] [Revised: 05/22/2012] [Accepted: 05/28/2012] [Indexed: 11/23/2022]
|
14
|
Comparison between acetate and propionate as carbon sources for phosphorus removal in the aerobic/extended-idle regime. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2012.10.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
15
|
Development of a fluorescence-based microplate method for the determination of volatile fatty acids in anaerobically digested and sewage sludges. Talanta 2012; 88:230-6. [DOI: 10.1016/j.talanta.2011.10.037] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 09/23/2011] [Accepted: 10/12/2011] [Indexed: 10/15/2022]
|
16
|
From wastewater to bioenergy and biochemicals via two-stage bioconversion processes: a future paradigm. Biotechnol Adv 2011; 29:972-82. [PMID: 21884782 DOI: 10.1016/j.biotechadv.2011.08.012] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 08/06/2011] [Accepted: 08/14/2011] [Indexed: 11/22/2022]
Abstract
Recovery of bioenergy and biochemicals from wastewater has attracted growing and widespread interests. In this respect, two-stage bioconversion process (TSBP) offers an appealing avenue to achieve stepwise and directional substrate conversion in separated stages. Such a biosystem not only enables enhanced degradation of organics, but also favors a high product yield and quality. Various TSBRs have been developed for the production of methane, hydrogen, electricity, bioplastics, bioflocculants, biopesticides, biosurfactants and other value-added products, demonstrating marked advantages over the conventional one-stage processes. It represents a promising, and likely the sole viable, paradigm for future application. However, there are also many remaining challenges. This paper provides an overview of the various TSBPs, introduces the recent advances, and discusses the major challenges and the future perspectives for practical application.
Collapse
|
17
|
Feng L, Yan Y, Chen Y. Co-fermentation of waste activated sludge with food waste for short-chain fatty acids production: effect of pH at ambient temperature. ACTA ACUST UNITED AC 2011. [DOI: 10.1007/s11783-011-0334-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
18
|
Chuang SH, Chang WC, Huang YH, Tseng CC, Tai CC. Effects of different carbon supplements on phosphorus removal in low C/P ratio industrial wastewater. BIORESOURCE TECHNOLOGY 2011; 102:5461-5465. [PMID: 21183336 DOI: 10.1016/j.biortech.2010.11.118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2010] [Revised: 11/23/2010] [Accepted: 11/25/2010] [Indexed: 05/30/2023]
Abstract
This study focuses on the effects of different carbon supplements on biological phosphorus removal in the optonics and semiconductor industrial wastewater treatment. Experimental results demonstrate that the addition of a carbon source (glucose, acetate, and digester supernatant) improved phosphorus removal effectively. When the COD/P ratios were controlled in the range of 18-20 (using glucose and supernatant as supplement), the acclimated sludge showed more than 98% removal of phosphorus. In addition, different organic carbons induce dissimilar behavior in anaerobic release and aerobic uptake of phosphorus. The glucose supplement induces significant phosphorus release in anaerobic phase and then an increased phosphorus uptake in aerobic phase. The released phosphorus descended in anaerobic phase when acetate and supernatant were added. There was a good linear relationship of first order reaction between initial COD concentration and specific substrate utilization rate in anaerobic phase.
Collapse
Affiliation(s)
- Shun-Hsing Chuang
- Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung County 41349, Taiwan.
| | | | | | | | | |
Collapse
|
19
|
Li H, Chen X, Chen Y. Effect of the addition of organic carbon sources on nitrous oxide emission in anaerobic-aerobic (low dissolved oxygen) sequencing batch reactors. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s11783-010-0248-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
20
|
Research on polyhydroxyalkanoates and glycogen transformations: Key aspects to biologic nitrogen and phosphorus removal in low dissolved oxygen systems. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s11783-010-0243-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
21
|
|
22
|
Wu H, Yang D, Zhou Q, Song Z. The effect of pH on anaerobic fermentation of primary sludge at room temperature. JOURNAL OF HAZARDOUS MATERIALS 2009; 172:196-201. [PMID: 19643539 DOI: 10.1016/j.jhazmat.2009.06.146] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2009] [Revised: 06/25/2009] [Accepted: 06/26/2009] [Indexed: 05/08/2023]
Abstract
The effect of pH in the range of 3.0-11.0 on anaerobic fermentation of primary sludge (PS) was investigated at room temperature. The experimental results showed that the concentrations of soluble chemical oxygen demands (SCOD), soluble protein and carbohydrate and short-chain fatty acids (SCFAs) under alkaline conditions were significantly higher than those under other pHs. At fermentation time of 5 days, the average SCFAs concentration increased from 968 to 3511mg COD/L with the increase of pH from 3.0 to 10.0. However, further increasing pH to 11.0 resulted in the decrease of SCFAs. At pH 10.0, acetic, propionic and iso-valeric acids were the three main products, and the volatile suspended solids (VSS) reduction reached 38%. It was also observed that at any pH value investigated, there were obvious ammonia and phosphorus releases during fermentation. According to this study it is obvious that alkaline pH benefited the soluble organic carbon production from PS.
Collapse
Affiliation(s)
- Haiyan Wu
- State Key Laboratory of Pollution Control and Resources Reuse, College of Environmental Science and Engineering, Tongji University,1239 Siping Road, Shanghai 200092, China
| | | | | | | |
Collapse
|
23
|
Li H, Chen Y, Gu G. The effect of propionic to acetic acid ratio on anaerobic-aerobic (low dissolved oxygen) biological phosphorus and nitrogen removal. BIORESOURCE TECHNOLOGY 2008; 99:4400-7. [PMID: 17919901 DOI: 10.1016/j.biortech.2007.08.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2007] [Revised: 08/19/2007] [Accepted: 08/21/2007] [Indexed: 05/08/2023]
Abstract
In this paper, three lab-scale sequencing batch reactors (SBR-A, B, and C) operated with anaerobic/aerobic (low dissolved oxygen, 0.15-0.45 mg L(-1)) configuration were long-term cultured, respectively with single acetic acid and propionic/acetic acid of 1/1 and 2/1 (carbon molar ratio), and the comparisons of anaerobic and aerobic transformations of phosphorus and nitrogen among them were made. With the increase of propionic/acetic acid, lower anaerobic phosphorus release and higher phosphorus release to short-chain fatty acids uptake ratio were observed, and less anaerobic and aerobic transformations of glycogen and poly-3-hydroxybutyrate as well as total polyhydroxyalkanoates occurred, but the transformations of poly-3-hydroxyvalerate and poly-3-hydroxy-2-methyvalerate increased. The phosphorus removal efficiency was respectively 81, 94 and 97% in SBR-A, B and C. Almost all ammonium was removed and no significant nitrite was accumulated at different propionic/acetic acid ratios. However, the nitrate accumulation and total nitrogen removal were observed to be affected by propionic/acetic acid ratio. The total nitrogen removal efficiency was 61, 68 and 82%, and the aerobic end nitrate concentration was 8.05, 6.40 and 3.54 mg L(-1) in three SBRs, respectively. All the above studies indicated that the sole acetic acid caused more nitrate accumulation than propionic and acetic acids mixture, and a pertinent increase of wastewater propionic/acetic acid ratio was of benefit to both nitrogen and phosphorus removal in an anaerobic/aerobic (low dissolved oxygen) biological wastewater treatment process.
Collapse
Affiliation(s)
- Hongjing Li
- State Key Lab of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, PR China
| | | | | |
Collapse
|
24
|
Broughton A, Pratt S, Shilton A. Enhanced biological phosphorus removal for high-strength wastewater with a low rbCOD:P ratio. BIORESOURCE TECHNOLOGY 2008; 99:1236-41. [PMID: 17391958 DOI: 10.1016/j.biortech.2007.02.013] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2006] [Revised: 02/11/2007] [Accepted: 02/12/2007] [Indexed: 05/14/2023]
Abstract
In order to assess the feasibility of enhanced biological phosphorus removal (EBPR) for dairy processing wastewater, which in New Zealand have rbCOD:P ratios that can be as low as 13:1, a sequencing batch reactor treating a synthetic wastewater with a COD(VFA) of 800 mg/l (representing a dissolved air flotation (DAF) treated, pre-fermented dairy wastewater with a raw COD of 3000 mg/l) was operated at COD:P ratios of 25:1, 15:1 and 10:1. Full (>99%) phosphate removal was achieved for COD:P loadings of 25:1 and 15:1. The trial using 10:1 COD:P loading showed less consistency but still achieved 82% phosphate removal. Based on further analysis of the final trial this study proposes that the minimum COD:P loading for complete phosphate removal is 13:1 indicating that EBPR could indeed be feasible for effective treatment of dairy processing wastewaters. With regard to the type of COD consumed, propionate was found to be favoured over acetate as a substrate. Further research into increasing the propionate content of pre-fermented dairy wastewaters is suggested.
Collapse
Affiliation(s)
- Alistair Broughton
- Centre for Environmental Technology and Engineering, Massey University, Palmerston North, New Zealand
| | | | | |
Collapse
|
25
|
Ahmed Z, Lim BR, Cho J, Song KG, Kim KP, Ahn KH. Biological nitrogen and phosphorus removal and changes in microbial community structure in a membrane bioreactor: effect of different carbon sources. WATER RESEARCH 2008; 42:198-210. [PMID: 17640701 DOI: 10.1016/j.watres.2007.06.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2007] [Revised: 06/15/2007] [Accepted: 06/24/2007] [Indexed: 05/16/2023]
Abstract
Bacterial community structures in four sequencing anoxic/anaerobic-aerobic membrane bioreactors (SAMs) that were fed with synthetic medium composed of different organic compounds in substrate as carbon source; acetate-dominant (acetate/propionate = 4/1), propionate-dominant (acetate/propionate = 1/4), glucose-dominant (glucose/acetate = 4/1) and methanol-dominant (methanol/acetate/propionate = 6/3/1) were analyzed by respiratory quinone profile and fluorescent in situ hybridization (FISH) techniques. The SAMs were operated at controlled pH range 7-8.5 and at constant temperature 25 degrees C. Total nitrogen (TN), total phosphorus (TP) and COD removal performances were also evaluated and compared. In addition, trans-membrane pressure was monitored to observe the impact of substrate composition on membrane fouling. The dominance of the mole fraction of ubiquinone (UQ-8) in the SAMs indicated dominance of the beta-subclass of Proteobacteria; however, its population comparatively decreased when the substrate was glucose dominant or methanol dominant. A relatively higher and stable enhanced biological phosphorus removal performance was observed when methanol-dominant substrate was used concurrently with an increase in the gamma-subclass of Proteobacteria. The population of the alpha-subclass of Proteobacteria slightly increased along with a decrease in phosphate removal activity when the substrate was glucose-dominant. Results from FISH analysis also supported the findings of the quinone profile. The trans-membrane pressure variation in the SAMs indicated that fouling was relatively rapid when propionate-dominant or methanol-dominant substrate was used and most stable when glucose-dominant substrate was used. A combination of methanol and acetate would be a better choice as an external carbon source when nutrients removals, as well as fouling, are considered in the membrane bioreactor- (MBR-) coupled biological nutrients removing (BNR) process.
Collapse
Affiliation(s)
- Zubair Ahmed
- Center for Environmental Technology Research, Energy & Environment Research Division, Korea Institute of Science and Technology, Seoul 130-650, Republic of Korea.
| | | | | | | | | | | |
Collapse
|
26
|
Jiang S, Chen Y, Zhou Q. Influence of alkyl sulfates on waste activated sludge fermentation at ambient temperature. JOURNAL OF HAZARDOUS MATERIALS 2007; 148:110-5. [PMID: 17368934 DOI: 10.1016/j.jhazmat.2007.02.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2006] [Revised: 01/12/2007] [Accepted: 02/07/2007] [Indexed: 05/14/2023]
Abstract
Alkyl sulfates (AS), such as sodium dodecyl sulfate (SDS), are widely used in household and industrial products, and can be found in some wastewater and waste activated sludge (WAS). The effect of SDS on the fermentation of WAS at ambient temperature was investigated in this paper. Experimental results showed that the concentrations of protein and carbohydrate in aqueous phase increased with the amount of SDS. The concentrations of both NH(4)(+)-N and PO(4)(3-)-P in fermentation liquor also increased in the presence of SDS. In addition, it was observed that the fermentative short-chain fatty acids (SCFAs) concentration was affected by SDS. With the increase of SDS dosage, the maximum SCFAs concentration increased, and the fermentation time before reaching the maximum SCFAs concentration also increased. Further investigation showed that the produced SCFAs consisted of acetic, propionic, n-butyric, iso-butyric, n-valeric and iso-valeric acids, and acetic, iso-valeric and propionic acids were the three main products. The influence of SDS on methanogenesis was also investigated, and the inhibitory effect of SDS on methanogens activity was observed.
Collapse
Affiliation(s)
- Su Jiang
- State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | | | | |
Collapse
|