1
|
Liu Z, Cui Z, Guo Z, Li D, He Z, Liu W, Yue X, Zhou A. Insights into the effect of nitrate photolysis on short-chain fatty acids production from waste activated sludge in anaerobic fermentation system: Performance and mechanisms. WATER RESEARCH 2024; 258:121772. [PMID: 38761600 DOI: 10.1016/j.watres.2024.121772] [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: 02/23/2024] [Revised: 04/20/2024] [Accepted: 05/12/2024] [Indexed: 05/20/2024]
Abstract
Nitrate photolysis has become an efficient, low-cost and promising technology for emerging contaminants removal, while its performance and mechanism for waste activated sludge (WAS) treatment is still unknown. This study innovatively introduced nitrate photolysis for WAS disintegration, and investigated the effect of nitrate addition (150-375 mg N/L) for short-chain fatty acids (SCFAs) production during anaerobic fermentation (AF). The results showed that nitrate photolysis significantly promoted the SCFAs production from WAS, and peaked at 280.7 mg/g VSS with 7-d fermentation with 150 mg N/L addition (150N-UV), which increased by 8.8-35.0 % and 10.7-23.3 % compared with other photolysis groups and sole nitrate groups. Effective release of the soluble organics was observed in the nitrate photolysis groups during AF, especially soluble proteins, reaching 1505.4 mg COD/L at 9 d in 150N-UV group, promoted by 7.0∼15.7 % than nitrate/nitrate photolysis groups. The model compounds simulation experiment further demonstrated the positive effect of nitrate photolysis on organics hydrolysis and SCFAs accumulation. The result of the radical capture and quenching verified the reactive oxygen species contributed more compared with reactive nitrogen species. Functional group analysis confirmed the effective bioconversion of the macromolecular organics during the fermentation. Moreover, the nitrate photolysis enhanced the enrichment of the functional consortia, including anaerobic fermentation bacteria (AFB), e.g., Fnoticella, Romboutsia, Gracilibacter and Sedimentibacter, and nitrate reducing bacteria (NRB), e.g., Acinerobacter and Ahniella. The macrogenetic analysis further revealed that glycolysis, amino acid metabolism, acetate metabolism and nitrogen metabolism were the dominating metabolic pathways during fermentation, and the abundance of the relevant genes were enhanced in 150N-UV group.
Collapse
Affiliation(s)
- Zhihong Liu
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China; Shanxi Academy of Advanced Research and Innovation, Taiyuan 030024, China
| | - Zhixuan Cui
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China
| | - Zhengtong Guo
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China
| | - Dengfei Li
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, China
| | - Zhangwei He
- School of Environment and Municipal Engineering, Xi'an University of Architecture and Technology, Shanxi 710055, China
| | - Wenzong Liu
- Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, China
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China; Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering, Taiyuan, China.
| |
Collapse
|
2
|
Wang F, Du W, Huang W, Fang S, Cheng X, Feng L, Cao J, Luo J, Wu Y. Linkages of volatile fatty acids and polyhexamethylene guanidine stress during sludge fermentation: Metagenomic insights of microbial metabolic traits and adaptation. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
3
|
Wang F, Wu Y, Du W, Shao Q, Huang W, Fang S, Cheng X, Cao J, Luo J. How does the polyhexamethylene guanidine interact with waste activated sludge and affect the metabolic functions in anaerobic fermentation for volatile fatty acids production. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 839:156329. [PMID: 35654193 DOI: 10.1016/j.scitotenv.2022.156329] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/25/2022] [Accepted: 05/25/2022] [Indexed: 06/15/2023]
Abstract
Antibacterial agents are frequently used to ensure public hygiene. Most of the massively consumed chemicals are discarded and accumulated in waste activated sludge (WAS), which might influence the subsequent anaerobic fermentation process for WAS treatment. This study mainly investigated the impacts of polyhexamethylene guanidine (PHMG, considered as a safe and efficient broad-spectrum antibacterial agent) on the volatile fatty acids (VFAs) production derived from WAS anaerobic fermentation and disclosed the key mechanisms. Results demonstrated that low level of PHMG evidently increased the VFAs accumulation as well as the acetic acid proportion, while the excessive dose posed evident negative effects. Further analysis found that appropriate PHMG synchronously stimulated the solubilization/hydrolysis and acidification processes but inhibited methanogenesis. Mechanistic exploration revealed that PHMG firstly absorbed on WAS due to electric attraction but then interacted with WAS to promote extracellular polymeric substance (EPS) disintegration and organics release (especially proteinaceous matter). Moreover, PHMG affected the microbial community structure and metabolic functions. The low level of PHMG evidently enriched functional VFAs producers (i.e., Desulfobulbus, Macellibacteroides and Sporanaerobacter) and upregulated the critical genes expression responsible for substrates metabolism (particularly the proteins) and VFAs biosynthesis (i.e., aldehyde dehydrogenase (NAD+) (K00128) and molybdopterin oxidoreductase (K00184)). This study provides an in-depth understanding of emerging pollutant impacts on WAS fermentation and provides insightful guidance on WAS disposal.
Collapse
Affiliation(s)
- Feng Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
| | - Yang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China
| | - Wei Du
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
| | - Qianqi Shao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
| | - Wenxuan Huang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
| | - Shiyu Fang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
| | - Xiaoshi Cheng
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
| | - Jiashun Cao
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China
| | - Jingyang Luo
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, 1 Xikang Road, Nanjing 210098, China; College of Environment, Hohai University, 1 Xikang Road, Nanjing 210098, China; Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse, China.
| |
Collapse
|
4
|
Biogas Production from Oil Palm Empty Fruit Bunches and Palm Oil Decanter Cake using Solid-State Anaerobic co-Digestion. ENERGIES 2019. [DOI: 10.3390/en12224368] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Oil palm empty fruit bunches (EFB) and palm oil decanter cake (DC) were used to investigate biogas production by using solid-state anaerobic co-digestion (SS-AcoD) with 15% total solid (TS) content. Solid state anaerobic digestion (SS-AD) using substrate to inoculum (S:I) ratio of 3:1, methane yields of 353.0 mL-CH4/g-VS and 101.5 mL-CH4/g-VS were respectively achieved from mono-digestion of EFB without oil palm ash (OPA) addition and of DC with 10% OPA addition under mesophilic conditions 35 °C. By adding 5% OPA to SS-AD using 3:1 S:I ratio under thermophilic conditions (55 °C), mono-digestion of EFB and DC provided methane yields of 365.0 and 160.3 mL-CH4/g-VS, respectively. Furthermore, SS-AcoD of EFB:DC at 1:1 mixing ratio (volatile solid, VS basis), corresponding to carbon to nitrogen (C:N) ratio of 32, gathering with S:I ratio of 3:1 and 5% ash addition, synergistic effect is observed together with similar methane yields of 414.4 and 399.3 mL-CH4/g-VS, achieved under 35 °C and 55 °C, respectively. According to first order kinetic analysis under synergistic condition, methane production rate from thermophilic operation is 5 times higher than that from mesophilic operation. Therefore, SS-AcoD could be potentially beneficial to generate biogas from EFB and DC.
Collapse
|
5
|
Truu M, Oopkaup K, Krustok I, Kõiv-Vainik M, Nõlvak H, Truu J. Bacterial community activity and dynamics in the biofilm of an experimental hybrid wetland system treating greywater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:4013-4026. [PMID: 30554320 DOI: 10.1007/s11356-018-3940-8] [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: 08/14/2018] [Accepted: 12/06/2018] [Indexed: 06/09/2023]
Abstract
The objectives of this study were to determine the biofilm microbial activity and bacterial community structure and successions in greywater treatment filters and to relate the treatment efficiency to the bacterial community parameters. This 10-month study was performed in a newly established experimental system for domestic greywater treatment that consisted of three parallel vertical flow filters (VFs) followed by a horizontal flow filter (HF). A rapid increase in the bacterial community abundance occurred during the first 85 days of filter operations, followed by a short-term decrease and the stabilization of the 16S rRNA gene copy numbers at average levels of 1.2 × 109 and 3.2 × 108 copies/g dw in VFs and HF, respectively, until the end of the experiment. The dominant bacterial phyla and genera differed between the VFs and HF. The temporal variation in the bacterial community structure was primarily related to the species replacement, and it was significantly affected by the influent organic carbon and nitrogen compounds in the VFs and the ammonia and organic carbon in the HF filters. Despite the differences in the community structure and assembly mechanisms, the temporal dynamics of the bacterial community showed high congruence between the filter types. The treatment efficiency was related to the biofilm bacterial community diversity and abundance and the abundance of certain bacterial genera in the VF filters. The results suggest that the dominant pathway of nitrogen removal by greywater treatment VFs occurs via coupled heterotrophic nitrification and denitrification, while the contribution of aerobic denitrification is temporally variable in these filters.
Collapse
Affiliation(s)
- Marika Truu
- Faculty of Science and Technology, University of Tartu, Vanemuise 46, 51014, Tartu, Estonia
| | - Kristjan Oopkaup
- Faculty of Science and Technology, University of Tartu, Vanemuise 46, 51014, Tartu, Estonia
| | - Ivo Krustok
- Department of Environmental Management, Ministry of the Environment, Narva St. 7a, 15172, Tallinn, Estonia
| | - Margit Kõiv-Vainik
- Faculty of Science and Technology, University of Tartu, Vanemuise 46, 51014, Tartu, Estonia
| | - Hiie Nõlvak
- Faculty of Science and Technology, University of Tartu, Vanemuise 46, 51014, Tartu, Estonia
| | - Jaak Truu
- Faculty of Science and Technology, University of Tartu, Vanemuise 46, 51014, Tartu, Estonia.
| |
Collapse
|
6
|
Wang S, Zhou A, Zhang J, Liu Z, Zheng J, Zhao X, Yue X. Enhanced quinoline removal by zero-valent iron-coupled novel anaerobic processes: performance and underlying function analysis. RSC Adv 2019; 9:1176-1186. [PMID: 35518020 PMCID: PMC9059619 DOI: 10.1039/c8ra09529a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 12/19/2018] [Indexed: 12/03/2022] Open
Abstract
Quinoline is toxic and difficult to degrade biologically; thus, it is a serious threat to the safety of ecosystems. To promote quinoline reduction, zero-valent iron (ZVI) was introduced into an anaerobic digestion (AD) system through batch experiments. The performance of three different types of ZVI (i.e., iron powder, iron scrap and rusty iron scrap) on quinoline degradation, methane production, formation of volatile fatty acids (VFAs) and chemical oxygen demand (COD) removal were investigated systematically. Compared to the AD system alone, quinoline and COD removal as well as the production of methane and acetic acid were effectively enhanced by ZVI, especially rusty iron scrap. The removal efficiencies of quinoline and COD were increased by 28.6% and 19.9%, respectively. The enhanced effects were attributed to the high accumulation of ferrous ions and high pH self-buffering capability, which were established by ZVI addition. Furthermore, high-throughput sequencing analysis indicated that the functional microorganisms in the ZVI-AD system were higher than in the AD system, and the added types of ZVI played important roles in structuring the innate microbial community in waste activated sludge (WAS). Especially, high enrichment of microorganisms capable of degrading quinoline, such as Pseudomonas and Bacillus, in the coupled system was detected.
Collapse
Affiliation(s)
- Sufang Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Jiaguang Zhang
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Zhaohua Liu
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Jierong Zheng
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Xiaochan Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology Taiyuan 030024 Shanxi Province China +86-0351-3176581 +86-0351-3176581
| |
Collapse
|
7
|
Zhu Y, Cao X, Cheng Y, Zhu T. Performances and structures of functional microbial communities in the mono azo dye decolorization and mineralization stages. CHEMOSPHERE 2018; 210:1051-1060. [PMID: 30208530 DOI: 10.1016/j.chemosphere.2018.07.083] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Revised: 06/20/2018] [Accepted: 07/15/2018] [Indexed: 06/08/2023]
Abstract
Removal of azo dye from wastewater with biological method is a complicated process, including decolorization and mineralization. However, there is little understanding of the functional microbial community involved in the whole dye degradation process. In this study, a simplified model using anaerobic3-oxic2-sedimentaion reactor was proposed. Acid Orange and Methyl Orange were treated as model azo dyes. In each compartment, the degradation intermediates of azo dyes were identified with UV-Vis, FTIR, HPLC-MS and GC-MS, and the corresponding microorganisms were determined with 16S rDNA high throughput Miseq sequencing. Decolorization happened in anaerobic compartments, while mineralization of the resulted aromatic amines mainly occurred under aerobic circumstance. LEfSe analysis demonstrated that the microbial community compositions were significantly influenced by the chemical structures of substrates. With t-value biplot, the relationship between azo dye degradation and microbial community structure was proposed statistically. It was found that the functional microbial communities varied with the change of azo dye degradation intermediates. Besides, cleavage of benzene ring also happened under anaerobic circumstance. This may be due to the genera of Parabacteroides and Bacteroides, which exhibited significantly positive relationships with 1,4-Benzenediol. With the new model, the performances and structures of functional microbial communities for NN- reduction and aromatic amines mineralization were characterized and the reaction mechanism was explored.
Collapse
Affiliation(s)
- Yuling Zhu
- School of Life Science, Shaoxing University, Huancheng West Road No. 508, Shaoxing, Zhejiang 312000, China.
| | - Xiwei Cao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China
| | - Yutong Cheng
- School of Water Resources and Environment, China University of Geosciences Beijing, Beijing 100083, China
| | - Tingting Zhu
- State Environmental Protection, Key Laboratory of Drinking Water Source Management and Technology, Shenzhen Key Laboratory of Drinking Water Source Safety Control, Shenzhen Key Laboratory of Emerging Contaminates Detection and Control in Water Environment, Shenzhen, Guangdong 51800, China
| |
Collapse
|
8
|
Zhang J, Zhou A, Liu Y, Zhao B, Luan Y, Wang S, Yue X, Li Z. Microbial network of the carbonate precipitation process induced by microbial consortia and the potential application to crack healing in concrete. Sci Rep 2017; 7:14600. [PMID: 29097756 PMCID: PMC5668378 DOI: 10.1038/s41598-017-15177-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 10/23/2017] [Indexed: 11/09/2022] Open
Abstract
Current studies have employed various pure-cultures for improving concrete durability based on microbially induced carbonate precipitation (MICP). However, there have been very few reports concerned with microbial consortia, which could perform more complex tasks and be more robust in their resistance to environmental fluctuations. In this study, we constructed three microbial consortia that are capable of MICP under aerobic (AE), anaerobic (AN) and facultative anaerobic (FA) conditions. The results showed that AE consortia showed more positive effects on inorganic carbon conversion than AN and FA consortia. Pyrosequencing analysis showed that clear distinctions appeared in the community structure between different microbial consortia systems. Further investigation on microbial community networks revealed that the species in the three microbial consortia built thorough energetic and metabolic interaction networks regarding MICP, nitrate-reduction, bacterial endospores and fermentation communities. Crack-healing experiments showed that the selected cracks of the three consortia-based concrete specimens were almost completely healed in 28 days, which was consistent with the studies using pure cultures. Although the economic advantage might not be clear yet, this study highlights the potential implementation of microbial consortia on crack healing in concrete.
Collapse
Affiliation(s)
- Jiaguang Zhang
- College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan, China
- Shanxi Construction Engineering Group Corporation, Taiyuan, China
| | - Aijuan Zhou
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China.
| | - Yuanzhen Liu
- College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan, China
| | - Bowei Zhao
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China
| | - Yunbo Luan
- College of mechanics, Taiyuan University of Technology, Taiyuan, China
| | - Sufang Wang
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China
| | - Xiuping Yue
- College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan, China
| | - Zhu Li
- College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan, China.
| |
Collapse
|