1
|
Wang Y, Sun S, Liu Q, Su Y, Zhang H, Zhu M, Tang F, Gu Y, Zhao C. Characteristic microbiome and synergistic mechanism by engineering agent MAB-1 to evaluate oil-contaminated soil biodegradation in different layer soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:10802-10817. [PMID: 38212565 DOI: 10.1007/s11356-024-31891-4] [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: 09/13/2023] [Accepted: 01/03/2024] [Indexed: 01/13/2024]
Abstract
Bioremediation is a sustainable and pollution-free technology for crude oil-contaminated soil. However, most studies are limited to the remediation of shallow crude oil-contaminated soil, while ignoring the deeper soil. Here, a high-efficiency composite microbial agent MAB-1 was provided containing Bacillus (naphthalene and pyrene), Acinetobacter (cyclohexane), and Microbacterium (xylene) to be synergism degradation of crude oil components combined with other treatments. According to the crude oil degradation rate, the up-layer (63.64%), middle-layer (50.84%), and underlying-layer (54.21%) crude oil-contaminated soil are suitable for bioaugmentation (BA), biostimulation (BS), and biostimulation+bioventing (BS+BV), respectively. Combined with GC-MS and carbon number distribution analysis, under the optimal biotreatment, the degradation rates of 2-ring and 3-ring PAHs in layers soil were about 70% and 45%, respectively, and the medium and long-chain alkanes were reduced during the remediation. More importantly, the relative abundance of bacteria associated with crude oil degradation increased in each layer after the optimal treatment, such as Microbacterium (2.10-14%), Bacillus (2.56-12.1%), and Acinetobacter (0.95-12.15%) in the up-layer soil; Rhodococcus (1.5-6.9%) in the middle-layer soil; and Pseudomonas (3-5.4%) and Rhodococcus (1.3-13.2%) in the underlying-layer soil. Our evaluation results demonstrated that crude oil removal can be accelerated by adopting appropriate bioremediation approach for different depths of soil, providing a new perspective for the remediation of actual crude oil-contaminated sites.
Collapse
Affiliation(s)
- Yaru Wang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China
| | - Shuo Sun
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China
| | - Qiyou Liu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China.
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China.
| | - Yuhua Su
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China
| | - Hang Zhang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China
| | - Mingjun Zhu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China
| | - Fang Tang
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China
| | - Yingying Gu
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China
| | - Chaocheng Zhao
- College of Chemistry and Chemical Engineering, China University of Petroleum (East China), Qingdao, 266580, People's Republic of China
- State Key Laboratory of Petroleum Pollution Control, No.66 Changjiang West Road, Huangdao District, Qingdao, 266580, People's Republic of China
| |
Collapse
|
2
|
Torun F, Hostins B, De Schryver P, Boon N, De Vrieze J. Molybdate effectively controls sulphide production in a shrimp pond model. ENVIRONMENTAL RESEARCH 2022; 203:111797. [PMID: 34339704 DOI: 10.1016/j.envres.2021.111797] [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: 06/07/2021] [Revised: 07/27/2021] [Accepted: 07/27/2021] [Indexed: 06/13/2023]
Abstract
The production of shrimp is often performed in earthen outdoor ponds in which the high input of feed and faeces on the bottom can result in deterioration of the water quality, which negatively impacts the animals and the environment. Here, we investigate the potential of sodium molybdate (Na₂MoO₄·2H₂O), sodium nitrate (NaNO3) and sodium percarbonate (Na2CO3·1.5H2O2) to control sulphide production in a simulated shrimp pond bottom system that included the sediment, overlaying artificial seawater and organic matter input in the form of shrimp feed and shrimp faeces. Sediment depth gradient measurements of oxygen, H2S and pH were obtained during 7 days of incubation using microelectrodes. The most significant impact in terms of H2S, was observed for 50 mg/L sodium molybdate. At the water-sediment interface, there was up to 73% less H2S detected for this treatment in comparison to a control treatment, while in the deeper layers of the sediment it was up to 47% less H2S. The residual sulphate concentrations in the molybdate treated samples were 16 ± 4% higher than the control, indicating an inhibition in sulphate reduction. Nitrate and sodium percarbonate treatments also showed a limited capacity to decrease H2S entering in the water column, yet no clear difference in H2S concentrations in the sediment compared to the control were observed. Molybdate treatment appears to work through the inhibition of sulphate reducing bacteria in situ for the control of H2S production better than the chemical oxygen boosters or nitrate treatment.
Collapse
Affiliation(s)
- Funda Torun
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, Ghent, 9000, Belgium
| | | | | | - Nico Boon
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, Ghent, 9000, Belgium.
| | - Jo De Vrieze
- Center for Microbial Ecology and Technology (CMET), Ghent University, Coupure Links 653, Ghent, 9000, Belgium; Division of Soil and Water Management, Department of Earth and Environmental Sciences, KU Leuven, Kasteelpark Arenberg 20, PO box, 2411, B-3001 Leuven, Belgium; Bio- and Chemical Systems Technology, Reactor Engineering and Safety (CREaS), Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, PO box, 2424, B-3001 Leuven, Belgium
| |
Collapse
|
3
|
Purification Effect of Sequential Constructed Wetland for the Polluted Water in Urban River. WATER 2020. [DOI: 10.3390/w12041054] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Constructed wetlands can play an active role in improving the water quality of urban rivers. In this study, a sequential series system of the floating-bed constructed wetland (FBCW), horizontal subsurface flow constructed wetland (HSFCW), and surface flow constructed wetland (SFCW) were constructed for the urban river treatment in the cold regions of North China, which gave full play to the combined advantages. In the Yitong River, the designed capacity and the hydraulic loading of the system was 100 m3/d and 0.10 m3/m2d, respectively. The hydraulic retention time was approximately 72 h. The monitoring results, from April to October in 2016, showed the multiple wetland ecosystem could effectively remove chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), total phosphate (TP), and suspended solids (SS) at average removal rates of 74.79%, 80.90%, 71.12%, 78.44%, and 91.90%, respectively. The removal rate of SS in floating-bed wetland was the largest among all the indicators (80.24%), which could prevent the block of sub-surface flow wetland effectively. The sub-surface flow wetland could remove the NH4-N, TN, and TP effectively, and the contribution rates were 79.20%, 64.64%, and 81.71%, respectively. The surface flow wetland could further purify the TN and the removal rate of TN could reach 23%. The total investment of this ecological engineering was $12,000. The construction cost and the operation cost were $120 and $0.02 per ton of polluted water, which was about 1/3 to 1/5 and 1/6 to 1/3 of the conventional sewage treatment, respectively. The results of this study provide a technical demonstration of the restoration of polluted water in urban rivers in northern China.
Collapse
|
4
|
Ape F, Manini E, Quero GM, Luna GM, Sarà G, Vecchio P, Brignoli P, Ansferri S, Mirto S. Biostimulation of in situ microbial degradation processes in organically-enriched sediments mitigates the impact of aquaculture. CHEMOSPHERE 2019; 226:715-725. [PMID: 30959456 DOI: 10.1016/j.chemosphere.2019.03.178] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2018] [Revised: 03/12/2019] [Accepted: 03/27/2019] [Indexed: 06/09/2023]
Abstract
Fish farm deposition, resulting in organic matter accumulation on bottom sediments, has been identified as among the main phenomena causing negative environmental impacts in aquaculture. An in situ bioremediation treatment was carried out in order to reduce the organic matter accumulation in the fish farm sediments by promoting the natural microbial biodegradation processes. To assess the effect of the treatment, the concentration of organic matter in the sediment and its microbial degradation, as well as the response of the benthic prokaryotic community, were investigated. The results showed a significant effect of the treatment in stimulating microbial degradation rates, and the consequent decrease in the concentration of biochemical components beneath the cages during the treatment. During the bioremediation process, the prokaryotic community in the fish farm sediment responded to the overall improvement of the sediment conditions by showing the decrease of certain anaerobic taxa (e.g. Clostridiales, Acidaminobacteraceae and Caldilinaceae). This suggested that the bioactivator was effective in promoting a shift from an anaerobic to an aerobic metabolism in the prokaryotic community. However, the larger importance of Lachnospiraceae (members of the gut and faecal microbiota of the farmed fishes) in treated compared to non-treated sediments suggested that the bioactivator was not efficient in reducing the accumulation of faecal bacteria from the farmed fishes. Our results indicate that bioremediation is a promising tool to mitigate the aquaculture impact in fish farm sediments, and that further research needs to be oriented to identifying more successful interventions able to specifically target also fish-faeces related microbes.
Collapse
Affiliation(s)
- Francesca Ape
- Istituto per lo studio degli impatti Antropici e Sostenibilità in ambiente marino (IAS-CNR), Via G. da Verrazzano, 17, 91014, Castellammare del Golfo, TP, Italy
| | - Elena Manini
- Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM-CNR), Via Largo Fiera della Pesca, 1 - 60122 Ancona, Italy
| | - Grazia Marina Quero
- Stazione Zoologica Anton Dohrn, Integrative Marine Ecology Department, 80121, Napoli, Italy
| | - Gian Marco Luna
- Istituto per le Risorse Biologiche e le Biotecnologie Marine (IRBIM-CNR), Via Largo Fiera della Pesca, 1 - 60122 Ancona, Italy
| | - Gianluca Sarà
- Dipartimento di Scienze della Terra e del Mare, University of Palermo, Viale delle Scienze Ed. 16, 90128, Palermo, Italy
| | - Paolo Vecchio
- Eurovix S.p.A. - V.le E. Mattei 17, 24060, Entratico (Bergamo), Italy
| | | | - Sante Ansferri
- Eurovix S.p.A. - V.le E. Mattei 17, 24060, Entratico (Bergamo), Italy
| | - Simone Mirto
- Istituto per lo studio degli impatti Antropici e Sostenibilità in ambiente marino (IAS-CNR), Via G. da Verrazzano, 17, 91014, Castellammare del Golfo, TP, Italy.
| |
Collapse
|
5
|
Ihara H, Hori T, Aoyagi T, Takasaki M, Katayama Y. Sulfur-Oxidizing Bacteria Mediate Microbial Community Succession and Element Cycling in Launched Marine Sediment. Front Microbiol 2017; 8:152. [PMID: 28217124 PMCID: PMC5289976 DOI: 10.3389/fmicb.2017.00152] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 01/20/2017] [Indexed: 11/13/2022] Open
Abstract
A large amount of marine sediment was launched on land by the Great East Japan earthquake. Here, we employed both on-site and laboratory studies on the launched marine sediment to investigate the succession of microbial communities and its effects on geochemical properties of the sediment. Twenty-two-month on-site survey showed that microbial communities at the uppermost layer (0–2 mm depth) of the sediment changed significantly with time, whereas those at the deeper layer (20–40 mm depth) remained nearly unchanged and kept anaerobic microbial communities. Nine months after the incidence, various sulfur-oxidizing bacteria (SOB) prevailed in the uppermost layer, in which afterwards diverse chemoorganotrophic bacteria predominated. Geochemical analyses indicated that the concentration of metals other than Fe was lower in the uppermost layer than that in the deeper layer. Laboratory study was carried out by incubating the sediment for 57 days, and clearly indicated the dynamic transition of microbial communities in the uppermost layer exposed to atmosphere. SOB affiliated in the class Epsilonproteobacteria rapidly proliferated and dominated at the uppermost layer during the first 3 days, after that Fe(II)-oxidizing bacteria and chemoorganotrophic bacteria were sequentially dominant. Furthermore, the concentration of sulfate ion increased and the pH decreased. Consequently, SOB may have influenced the mobilization of heavy metals in the sediment by metal-bound sulfide oxidation and/or sediment acidification. These results demonstrate that SOB initiated the dynamic shift from the anaerobic to aerobic microbial communities, thereby playing a critical role in element cycling in the marine sediment.
Collapse
Affiliation(s)
- Hideyuki Ihara
- United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology Fuchu, Japan
| | - Tomoyuki Hori
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology Tsukuba, Japan
| | - Tomo Aoyagi
- Environmental Management Research Institute, National Institute of Advanced Industrial Science and Technology Tsukuba, Japan
| | - Mitsuru Takasaki
- Department of Food and Environmental Sciences, Faculty of Science and Engineering, Ishinomaki Senshu University Ishinomaki, Japan
| | - Yoko Katayama
- Institute of Agriculture, Tokyo University of Agriculture and Technology Fuchu, Japan
| |
Collapse
|
6
|
Stabili L, Licciano M, Gravina MF, Giangrande A. Filtering activity on a pure culture of Vibrio alginolyticus by the solitary ascidian Styela plicata and the colonial ascidian Polyandrocarpa zorritensis: a potential service to improve microbiological seawater quality economically. THE SCIENCE OF THE TOTAL ENVIRONMENT 2016; 573:11-18. [PMID: 27552728 DOI: 10.1016/j.scitotenv.2016.07.216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 07/29/2016] [Accepted: 07/30/2016] [Indexed: 06/06/2023]
Abstract
We investigated and compared, by laboratory experiments, the filter-feeding activity on bacteria by the solitary ascidian Styela plicata and the colonial ascidian Polyandrocarpa zorritensis. Clearance rates and retention efficiencies were estimated by using, as only food source, the bacterial species Vibrio alginolyticus selected on account of its importance in aquaculture pathogenicity. The Cmax was 1.4±0.17Lh-1g-1 DW for S. plicata and 1.745Lh-1g-1 DW for P. zorritensis. The highest retention efficiency was 41% corresponding to a removed bacterial biomass of 16.34+1.71 μgCL-1g-1 DW for P. zorritensis and 81% corresponding to a bacterial biomass of 32.28+2.15 μgCL-1g-1 DW for S. plicata. Styela plicata resulted higher efficient than P. zorritensis in removing V. alginolyticus from seawater in experimental tanks, thus representing a more suitable biofilter to restore the quality of microbiologically contaminated waters including those where aquaculture is practiced. Present laboratory experiments represent the first contribution to the comparison of the filtration activity of the two ascidians, as well as to characterize the filtration process on bacterioplankton and pone the basis for future field works aimed to restore bacteriological polluted seawater.
Collapse
Affiliation(s)
- Loredana Stabili
- Istituto per l'Ambiente Marino Costiero - Sezione di Taranto - CNR, Via Roma 3, 74100-Taranto, Italy; Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Università del Salento, Via Prov. Lecce-Monteroni, 73100-Lecce, Italy.
| | - Margherita Licciano
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Università del Salento, Via Prov. Lecce-Monteroni, 73100-Lecce, Italy.
| | - Maria Flavia Gravina
- Dipartimento di Biologia, Università degli Studi di Roma "Tor Vergata", Via della Ricerca Scientifica snc 00133, Roma.
| | - Adriana Giangrande
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Università del Salento, Via Prov. Lecce-Monteroni, 73100-Lecce, Italy.
| |
Collapse
|
7
|
Liu N, Ding F, Wang L, Liu P, Yu X, Ye K. Coupling of bio-PRB and enclosed in-well aeration system for remediation of nitrobenzene and aniline in groundwater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:9972-9983. [PMID: 26865481 DOI: 10.1007/s11356-016-6206-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2015] [Accepted: 01/29/2016] [Indexed: 06/05/2023]
Abstract
A laboratory-scale bio-permeable reactive barrier (bio-PRB) was constructed and combined with enclosed in-well aeration system to treat nitrobenzene (NB) and aniline (AN) in groundwater. Batch-style experiments were first conducted to evaluate the effectiveness of NB and AN degradation, using suspension (free cells) of degrading consortium and immobilized consortium by a mixture of perlite and peat. The NB and AN were completely degraded in <3 days using immobilized consortium, while 3-5 days were required using free cells. The O2 supply efficiency of an enclosed in-well aeration system was assessed in a box filled with perlite and peat. Dissolved O2 (DO) concentrations increased to 8-12 mg L(-1) in 12 h for sampling ports within 12 cm of the aeration well. A diffusion coefficient as 33.5 cm(2) s(-1) was obtained. The DO concentration was >4 mg L(-1) when the aeration system was applied into the bio-PRB system. The NB and AN were effectively removed when the aeration system was functional in the bio-PRB. The removal efficiency decreased when the aeration system malfunctioned for 20 days, thus indicating that DO was an important factor for the degradation of NB and AN. The regain of NB and AN removal after the malfunction indicates the robustness of degradation consortium. No original organics and new formed by-products were observed in the effluent. The results indicate that NB and AN in groundwater can be completely mineralized in a bio-PRB equipped with enclosed in-well aeration system and filled with perlite and peat attached with degrading consortium.
Collapse
Affiliation(s)
- Na Liu
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun, 130021, China
| | - Feng Ding
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun, 130021, China
| | - Liu Wang
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun, 130021, China
| | - Peng Liu
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun, 130021, China.
| | - Xiaolong Yu
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun, 130021, China
| | - Kang Ye
- Key Laboratory of Groundwater Resources and Environment, Ministry of Education, College of Environment and Resources, Jilin University, Changchun, 130021, China
| |
Collapse
|
8
|
Stabili L, Licciano M, Longo C, Lezzi M, Giangrande A. The Mediterranean non-indigenous ascidian Polyandrocarpa zorritensis: Microbiological accumulation capability and environmental implications. MARINE POLLUTION BULLETIN 2015; 101:146-152. [PMID: 26561443 DOI: 10.1016/j.marpolbul.2015.11.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 11/03/2015] [Accepted: 11/05/2015] [Indexed: 06/05/2023]
Abstract
We investigated the bacterial accumulation and digestion capability of Polyandrocarpa zorritensis, a non-indigenous colonial ascidian originally described in Peru and later found in the Mediterranean. Microbiological analyses were carried out on homogenates from "unstarved" and "starved" ascidians and seawater from the same sampling site (Adriatic Sea, Italy). Culturable heterotrophic bacteria (22 °C), total culturable bacteria (37 °C) and vibrios abundances were determined on Marine Agar 2216, Plate Count Agar and TCBS Agar, respectively. Microbial pollution indicators were measured by the most probable number method. All the examined microbiological groups were accumulated by ascidians but differently digested. An interesting outcome is the capability of P. zorritensis to digest allochthonous microorganisms such as coliforms as well as culturable bacteria at 37 °C, counteracting the effects of microbial pollution. Thus, the potential exploitation of these filter feeders to restore polluted seawater should be taken into consideration in the management of this alien species.
Collapse
Affiliation(s)
- Loredana Stabili
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Via Prov. Lecce-Monteroni, 73100 Lecce, Italy; Istituto per l'Ambiente Marino Costiero - Sezione di Taranto - CNR, Via Roma 3, 74100 Taranto, Italy.
| | - Margherita Licciano
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Via Prov. Lecce-Monteroni, 73100 Lecce, Italy.
| | - Caterina Longo
- Dipartimento di Biologia Animale ed Ambientale, Università di Bari, Via Orabona 4, 70125 Bari, Italy.
| | - Marco Lezzi
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Via Prov. Lecce-Monteroni, 73100 Lecce, Italy.
| | - Adriana Giangrande
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali (Di.S.Te.B.A.), Via Prov. Lecce-Monteroni, 73100 Lecce, Italy.
| |
Collapse
|
9
|
Temporal-spatial variation of bacterial diversity in estuary sediments in the south of Zhejiang Province, China. Appl Microbiol Biotechnol 2015; 100:2817-28. [PMID: 26572519 DOI: 10.1007/s00253-015-7103-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 10/11/2015] [Accepted: 10/14/2015] [Indexed: 10/24/2022]
Abstract
The winter and summer microbial community structure in sediment samples obtained from the estuaries of the wastewater-polluted River Ou (DO and XO), River Feiyun (DF and XF), and River Ao (DA and XA) in the south of Zhejiang Province in China was determined using 454 pyrosequencing. Sediment samples (DD and XD) were also correspondingly collected near the shore far from the estuaries for comparison. For the above sediments, 294,870 effective sequences were obtained to do the bacterial diversity and abundance determination. In total, 1924, 1517, 2071, 1956, 1995, 1800, 2261, and 2097 operational taxonomic units were obtained at 3 % distance cutoff in the DO, XO, DF, XF, DA, XA, DD, and XD sediments, respectively. Bacterial phylotype richness in DD was higher than the other sediments, and XO had the least richness. The most dominant class in the DA, DD, DF, DO, and XA sediments is Gammaproteobacteria. Deltaproteobacteria is the most dominant one in XD, XO, and XF. Circa 14.4 % sequences in XD were found to be affiliated with the Flavobacteriales order. Characterization of the estuarine sediment bacterial communities indicated that chemical pollution has the potential to decrease the natural variability that exists among estuary ecosystems. However, chemical pollutants did not cause clear bio-homogenization in these estuaries.
Collapse
|
10
|
Yamamoto T, Kim KH, Shirono K. A pilot study on remediation of sediments enriched by oyster farming wastes using granulated coal ash. MARINE POLLUTION BULLETIN 2015; 90:54-59. [PMID: 25480153 DOI: 10.1016/j.marpolbul.2014.11.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 11/10/2014] [Accepted: 11/17/2014] [Indexed: 06/04/2023]
Abstract
In order to evaluate the ability of granulated coal ash (GCA), a byproduct of coal thermal electric power stations, to remove hydrogen sulfide from organically enriched sediments, a pilot study was carried out at oyster farming sites, where sediments were enriched with oyster feces and dead oysters. Concentration of hydrogen sulfide in the interstitial water of the sediment decreased to nearly zero in both experimental sites, whereas it remained over 0.2mg/l in the control site. Concentration of acid volatile sulfide (AVS) in the sediment also decreased significantly in both experimental sites, while remained over 0.4 mg/g in the control site. Increases were observed in both the number of benthic microalgae species and the individual number of benthic animals in the surface sediments. This may have been due to the decrease in hydrogen sulfide.
Collapse
Affiliation(s)
- T Yamamoto
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| | - K H Kim
- Department of Ocean Engineering, Pukyong National University, Busan 608-737, Republic of Korea.
| | - K Shirono
- Graduate School of Biosphere Science, Hiroshima University, Higashi-Hiroshima 739-8528, Japan
| |
Collapse
|
11
|
Ittisupornrat S, Tobino T, Yamamoto K. A study of the relationship among sludge retention time, bacterial communities, and hydrolytic enzyme activities in inclined plate membrane bioreactors for the treatment of municipal wastewater. Appl Microbiol Biotechnol 2014; 98:9107-18. [DOI: 10.1007/s00253-014-5914-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 06/24/2014] [Accepted: 06/25/2014] [Indexed: 02/03/2023]
|
12
|
Wu X, Wu H, Ye J. Purification effects of two eco-ditch systems on Chinese soft-shelled turtle greenhouse culture wastewater pollution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:5610-8. [PMID: 24420561 DOI: 10.1007/s11356-013-2473-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Accepted: 12/16/2013] [Indexed: 05/10/2023]
Abstract
The present study used an eco-ditch system that employed Eichhornia crassipes, Bacillus subtilis, and Bellamya aeruginosa (E-B-B) during the summer and fall (high temperature) seasons and a second eco-ditch system that employed Elodea nuttallii, a compound microbial preparation called "EM bacteria", and Hypophthalmichthys molitrix (E-E-H) during the winter and spring (low temperature) seasons successively to purify the discharged wastewater produced by Chinese soft-shelled turtle greenhouse cultivation. The wastewater was sampled, and the dynamic changes in the major nutrient pollutant indicators over several months were analysed. After the E-B-B and E-E-H eco-ditch purification systems were operated for nearly 140 days each, the following results were observed: the total nitrogen (TN) removal rates in the wastewater were 75 % and 69 %, respectively; the total phosphorus (TP) removal rates were 82 % and 86 %, respectively; the NH4 (+)-N removal rates were 91 % and 75 %, respectively; the chemical oxygen demand (CODcr) decreased 54 % and 44 %, respectively; the dissolved oxygen (DO) contents increased nearly 3 to 4 times; and the wastewater was maintained at neutral or alkaline pH values. The wastewater physical traits gradually changed from being yellow, brown, and muddy to being pale yellow, slightly turbid, and odourless. Both eco-ditch systems were observed to have a relatively favourable effect on the purification of Chinese soft-shelled turtle aquaculture wastewater. The continuous use of both eco-ditch systems could result in a year-round purification effect on Chinese soft-shelled turtle greenhouse aquaculture wastewater; therefore, this method has good prospects for promotion and application.
Collapse
Affiliation(s)
- Xiang Wu
- Key Laboratory of Aquatic Resources Conservation and Development, Huzhou University, Huzhou City, Zhejiang Province, 313000, China
| | | | | |
Collapse
|
13
|
Santander-De Leon SMS, Okunishi S, Kihira M, Nakano M, Nuñal SN, Hidaka M, Yoshikawa T, Maeda H. Effect of magnesium peroxide biostimulation of fish feed-loaded marine sediments on changes in the bacterial community. Biocontrol Sci 2013; 18:41-51. [PMID: 23538850 DOI: 10.4265/bio.18.41] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The effect of an oxygen-releasing compound (ORC) magnesium peroxide (MgO(2)) on the changes in the bacterial community in organically polluted sediment of aquaculture farms was tested in a microcosm experiment. The sediment, to which fish feed was added, was treated with 1% or 5% MgO(2). The addition of fish feed induced a highly reduced environment with low redox potential, high total sulfides, and abundance of sulfate-reducing bacteria (SRB) . Although the sediment remained highly reduced at 1% MgO(2), there was a significant reduction of total sulfides, increase of redox potential, and resultant reduction of SRB. The bacterial community clearly changed with the treatments according to denaturing gradient gel electrophoresis (DGGE) analysis of 16S ribosomal RNA gene (16S rDNA) . Aerobes disappeared in the fish feed-added sediment, and some SRB emerged in place of these aerobes. On the other hand, the SRB disappeared in the ORC-amended sediment due to its highly oxic condition. This study revealed the bacterial community in the sediments was affected mainly by the redox potential and resultant sulfides produced by SRB, but total organic carbon and nitrogen were not determinants of the microbial population.
Collapse
Affiliation(s)
- Sheila Mae S Santander-De Leon
- Department of Resource and Environmental Science of Agriculture, Forestry and Fisheries, the United Graduate School of Agricultural Sciences, Kagoshima University, Korimoto, Kagoshima, Japan
| | | | | | | | | | | | | | | |
Collapse
|
14
|
d'Errico G, Giovannelli D, Montano C, Milanovic V, Ciani M, Manini E. Bioremediation of high organic load lagoon sediments: compost addition and priming effects. CHEMOSPHERE 2013; 91:99-104. [PMID: 23273326 DOI: 10.1016/j.chemosphere.2012.11.037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2012] [Revised: 11/19/2012] [Accepted: 11/21/2012] [Indexed: 06/01/2023]
Abstract
Lagoons are often affected by eutrophication phenomena, due to their shallow nature, high productivity, weak hydrodynamism and anthropic exploitation. Bioremediation techniques have been widely used in the treatment of chemical pollution; however, no information is available on the use of bioremediation of organic-rich sediments. In the present study, we investigated the priming effects following compost addition to organic-rich lagoon sediments, and the effects of this compost addition on degradation and cycling of organic detritus, transfer of organic matter to higher trophic levels, and in situ prokaryotic community structure. There was a positive response to treatment, particularly during the first days after compost addition. The compost had a stimulating effect on degradation activity of the prokaryotic community. This occurred despite an increase in available organic matter, as the community was more efficient at removing it. These data are supported by the prokaryotic community structure analysis, which revealed no changes in the in situ community following compost addition. This priming effect enhancement through compost addition represents an efficient method to treat organic-rich sediments.
Collapse
Affiliation(s)
- G d'Errico
- ISMAR-CNR, Institute for Marine Science, CNR, Largo Fiera della Pesca, 60125 Ancona, Italy
| | | | | | | | | | | |
Collapse
|
15
|
Stabili L, Terlizzi A, Cavallo RA. Sewage-exposed marine invertebrates: survival rates and microbiological accumulation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:1606-1616. [PMID: 22976047 DOI: 10.1007/s11356-012-1103-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 07/20/2012] [Indexed: 06/01/2023]
Abstract
A large number of bacteria, including agents responsible for diseases, characterise sewage-polluted seawaters. Apart from standards for bathing waters and bivalve aquaculture waters, there are no general microbiological standards applicable to seawaters to help decide if bacterial pollution is within acceptable ranges. This study represents an attempt towards the issue of comparing the susceptibility of different marine invertebrates subjected to polluted seawater with a high microbial contamination. We explored the survival rates and the microbiological accumulation of mollusc bivalves, echinoderms and crustaceans species exposed to sewage-polluted seawaters. Microbiological analyses were performed on the polluted seawater and on the homogenates of exposed and unexposed specimens. Culturable bacteria (22 °C and 37 °C) and microbial pollution indicators (total coliforms, Escherichia coli and intestinal enterococci) were measured. When exposed to the sewage-polluted seawater, the examined invertebrates showed different survival rates. In the filter feeders, bacterial densities at 22 °C and 37 °C rose after 96 h of exposure to sewage. The highest concentrations of total coliforms and intestinal enterococci were found in exposed bivalve Mytilus galloprovincialis. The concentrations of bacteria growing at 37 °C were lower in the exposed deposit feeders compared to the polluted seawater. Some yeasts were absent in several exposed species although these yeasts were present in the polluted seawater. Our data suggest that the examined filter feeders, given their capability to survive and accumulate bacteria, may counteract the effects of sewage and restore seawater quality.
Collapse
Affiliation(s)
- Loredana Stabili
- Istituto per l'Ambiente Marino Costiero Sezione di Taranto "A. Cerruti"-CNR, via Roma 3, 74100, Taranto, Italy.
| | | | | |
Collapse
|
16
|
Longo C, Corriero G, Licciano M, Stabili L. Bacterial accumulation by the Demospongiae Hymeniacidon perlevis: a tool for the bioremediation of polluted seawater. MARINE POLLUTION BULLETIN 2010; 60:1182-1187. [PMID: 20434181 DOI: 10.1016/j.marpolbul.2010.03.035] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Revised: 03/15/2010] [Accepted: 03/31/2010] [Indexed: 05/29/2023]
Abstract
Sponges can filter large amounts of water, which exerts an important grazing impact on free bacteria, an important component of the diet of sponges. We examined the accumulation of bacteria in the Demospongiae (Hymeniacidon perlevis). Analyses were performed on homogenates from unstarved and starved sponges in seawater from their sampling site (the Ionian Sea). Culturable heterotrophic bacteria (22 degrees C), total culturable bacteria (37 degrees C) and vibrios densities were measured on marine agar 2216, plate count agar and TCBS agar, respectively. Total and fecal coliforms, as well as fecal streptococci, were determined by the most probable number method (MPN). H. perlevis was able to accumulate all of the six microbiological groups. Bacterial groups differed in their resistance to digestion by H. perlevis. Our data suggest that H. perlevis may accumulate, remediate and metabolize bacteria and that they may be employed as a useful bioindicator and bioremediator.
Collapse
Affiliation(s)
- C Longo
- Dipartimento di Biologia Animale ed Ambientale, Università di Bari, Via Orabona, 4-70125 Bari, Italy
| | | | | | | |
Collapse
|
17
|
Yeh CH, Lin CW, Wu CH. A permeable reactive barrier for the bioremediation of BTEX-contaminated groundwater: Microbial community distribution and removal efficiencies. JOURNAL OF HAZARDOUS MATERIALS 2010; 178:74-80. [PMID: 20122795 DOI: 10.1016/j.jhazmat.2010.01.045] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 01/03/2010] [Accepted: 01/09/2010] [Indexed: 05/22/2023]
Abstract
This study was conducted with column experiments, batch experiments, and bench-scale permeable reactive barrier (PRB) for monitoring the PRB in the relation between BTEX (benzene, toluene, ethylbenzene, and p-xylene) decomposition efficiency and the distribution of a microbial community. To obtain the greatest amount of dissolved oxygen from oxygen-releasing compounds (ORCs), 20-d column tests were conducted, the results of which showed that the highest average amount of dissolved oxygen (DO) of 5.08 mg l(-1) (0.25 mg-O(2)d(-1)g(-1)-ORC) was achieved at a 40% level of CaO(2). In the batch experiments, the highest concentrations of benzene and toluene in which these compounds could be completely degraded were assumed to be 80 mg l(-1). Long-term monitoring for a PRB indicated that ORCs made with the oxygen-releasing rate of 0.25 mg-O(2)d(-1)g(-1)-ORC were applicable for use in the PRB because these ORCs have a long-term effect and adequately meet the oxygen demand of bacteria. The results from the DGGE of 16S rDNAs and real-time PCR of catechol 2,3-dioxygenase gene revealed the harmful effects of shock-loading on the microbial community and reduction in the removal efficiencies of BTEX. However, the efficiencies in the BTEX decomposition were improved and the microbial activities could be recovered thereafter as evidenced by the DGGE results.
Collapse
Affiliation(s)
- Chi-Hui Yeh
- Department of Environmental Engineering, Dayeh University, 168 University Rd., Dacun, Changhua, 51591, Taiwan, ROC
| | | | | |
Collapse
|
18
|
Zhao S, Hu N, Chen Z, Zhao B, Liang Y. Bioremediation of reclaimed wastewater used as landscape water by using the denitrifying bacterium Bacillus cereus. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2009; 83:337-340. [PMID: 19280091 DOI: 10.1007/s00128-009-9684-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2008] [Accepted: 02/26/2009] [Indexed: 05/27/2023]
Abstract
Organic matter and nitrogen removal from reclaimed wastewater used as landscape water was carried out by in situ bioremediation. A denitrifying bacterium Bacillus cereus DNF409 was introduced for this purpose, and the amount of B. cereus used was optimized. The total nitrogen (TN) content and chemical oxygen demand (COD) of the landscape water decreased from 9.86 to 3.1 mg/L (removal rate, 68.6%) and from 127 to 36 mg/L (removal rate, 71.7%). The transparency of water increased from 0.2 to 0.55 m.
Collapse
Affiliation(s)
- Shumiao Zhao
- State Key Laboratory of Agricultural Microbiology and College of Life Science and Technology, Huazhong Agricultural University, Wuhan, 430070, China.
| | | | | | | | | |
Collapse
|
19
|
Microbial communities and biodegradation in lab-scale BTEX-contaminated groundwater remediation using an oxygen-releasing reactive barrier. Bioprocess Biosyst Eng 2009; 33:383-91. [DOI: 10.1007/s00449-009-0336-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2009] [Accepted: 05/24/2009] [Indexed: 10/20/2022]
|
20
|
Abdallah E, Goncalves AA, Gagnon GA. Oxygen release compound as a chemical treatment for nutrient rich estuary sediments and water. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2009; 44:707-713. [PMID: 19412853 DOI: 10.1080/10934520902847844] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The objectives of this work were: (i) to evaluate the efficacy of Oxygen Release Compound (ORC), oxygen providing agent that enhance the oxidation of organic matter in fresh water, marine water, and sediment; and (ii) to explore the potential aquatic toxicity that might be generated due to its use. A bench scale laboratory experiments were conducted using five different water sources (2 freshwater, 2 marine water and a deionised water). During the assay, flasks of 1 L capacity were dosed with artificial sediment and ORC and kept at room temperature for 10 days. Temperature, pH, DO, UV254, TOC and Mg were periodically measured. The potential aquatic toxicity that might be generated as a by-product of ORC use was performed. The experimental results reveal that ORC is indeed effective in releasing oxygen over a long period of time and it is also effective for the remediation of natural waters enriched with organic matter. The toxicity test shows that ORC treatment did not create any biological toxicity in freshwater samples (IC50<1 Toxicity Unit-TU). However, marine water samples reveal a high toxicity and had IC50>1 TU. The study proves that ORC was an appropriate technology that can safely be used to treat natural waters enriched with nutrient and natural organic matter.
Collapse
Affiliation(s)
- Elsadig Abdallah
- Department of Civil and Resources Engineering, Center of Water Resources Studies, Dalhousie University, Halifax, NS, Canada
| | | | | |
Collapse
|
21
|
Dou J, Liu X, Hu Z. Anaerobic BTEX degradation in soil bioaugmented with mixed consortia under nitrate reducing conditions. J Environ Sci (China) 2008; 20:585-592. [PMID: 18575112 DOI: 10.1016/s1001-0742(08)62098-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Different concentrations of BTEX, including benzene, toluene, ethylbenzene, and three xylene isomers, were added into soil samples to investigate the anaerobic degradation potential by the augmented BTEX-adapted consortia under nitrate reducing conditions. All the BTEX substrates could be anaerobically biodegraded to non-detectable levels within 70 d when the initial concentrations were below 100 mg/kg in soil. Toluene was degraded faster than any other BTEX compounds, and the high-to-low order of degradation rates were toluene > ethylbenzene > m-xylene > o-xylene > benzene > p-xylene. Nitrite was accumulated with nitrate reduction, but the accumulation of nitrite had no inhibitory effect on the degradation of BTEX throughout the whole incubation. Indigenous bacteria in the soil could enhance the BTEX biodegradation ability of the enriched mixed bacteria. When the six BTEX compounds were simultaneously present in soil, there was no apparent inhibitory effect on their degradation with lower initial concentrations. Alternatively, benzene, o-xylene, and p-xylene degradation were inhibited with higher initial concentrations of 300 mg/kg. Higher BTEX biodegradation rates were observed in soil samples with the addition of sodium acetate compared to the presence of a single BTEX substrate, and the hypothesis of primary-substrate stimulation or cometabolic enhancement of BTEX biodegradation seems likely.
Collapse
Affiliation(s)
- Junfeng Dou
- College of Water Sciences, Beijing Normal University, Beijing 100875, China.
| | | | | |
Collapse
|
22
|
Wang L, Li J, Kang WL. Bioremediation of eutrophicated water by acinetobacter calcoaceticus. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2007; 78:527-30. [PMID: 17619803 DOI: 10.1007/s00128-007-9169-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2007] [Accepted: 06/01/2007] [Indexed: 05/16/2023]
Abstract
Removal of phosphorus and nitrogen from eutrophicated water was carried out by in situ bioremediation. With the addition of Acinetobacter calcoaceticus, 65.0% +/- 4.0% of total phosphorus (TP), 37.0% +/- 4.0% of total nitrogen (TN), 75.0% +/- 7.0% nitrite (NO(2) (-)-N), and 87.0% +/- 4.0% of ammonia (NH(4) (+)-N) were removed. Furthermore, chlorophyll a removal in the inoculated treatments reached 83.7% +/- 1.5%, and algae in the water was basically controlled.
Collapse
Affiliation(s)
- L Wang
- Department of Ecology and Environmental Sciences, College of Resource and Environment, China Agricultural University, Beijing 100094, People's Republic of China
| | | | | |
Collapse
|
23
|
Licciano M, Stabili L, Giangrande A, Cavallo RA. Bacterial accumulation by Branchiomma luctuosum (Annelida: Polychaeta): a tool for biomonitoring marine systems and restoring polluted waters. MARINE ENVIRONMENTAL RESEARCH 2007; 63:291-302. [PMID: 17208292 DOI: 10.1016/j.marenvres.2006.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2006] [Revised: 11/16/2006] [Accepted: 11/21/2006] [Indexed: 05/13/2023]
Abstract
In this study, we examined the bacterial accumulation in the filter feeder polychaete Branchiomma luctuosumGrube (Sabellidae). Analyses were performed on worm homogenates from 'unstarved' and 'starved' individuals, and seawater from the same sampling site (Gulf of Taranto, Western Mediterranean, Italy). Densities of culturable heterotrophic bacteria (22 degrees C), total culturable bacteria at 37 degrees C and halophilic vibrios at 22 and 35 degrees C were measured on Marine Agar 2216, Plate Count Agar and thiosulphate-citrate-bile-salt-agar (TCBS) plus 2% NaCl, respectively. Total and faecal coliforms as well as faecal streptococci were determined by the Most Probable Number method. Results showed that B. luctuosum is able to accumulate all the considered six microbiological groups with a higher efficiency for autochthonous bacteria. The analysis also indicated that bacterial groups differ in their resistance to digestion by B. luctuosum. Our data suggest the potential role of B. luctuosum as an useful bioindicator to assess low levels of microbiological water pollution as well as bioremediator of microbial polluted waters.
Collapse
Affiliation(s)
- Margherita Licciano
- Dipartimento di Scienze e Tecnologie Biologiche ed Ambientali, Via Prov. Lecce-Monteroni, 73100-Lecce, Italy.
| | | | | | | |
Collapse
|
24
|
Baxter J, Garton NJ, Cummings SP. The impact of acrylonitrile and bioaugmentation on the biodegradation activity and bacterial community structure of a topsoil. Folia Microbiol (Praha) 2006; 51:591-7. [PMID: 17455796 DOI: 10.1007/bf02931624] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The analysis of the bacterial community within the soil using DGGE showed acrylonitrile (ACN) could lead to the selection of significantly similar communities. Moreover, Rhodococcus sp. AJ270 was successfully established in the soil community. High GC G+-bacteria also responded positively to ACN addition. Bioaugmentation or carbon addition had no impact on the rate or degree of ACN degradation. ACN could be readily degraded by the soil bacteria, however, the community structure was significantly affected by its addition as well as by the addition of carbon or Rhodococcus sp. AJ270. The bioaugmentation of the soil with this strain was successful, in that the organism became established within the community. ACN addition to a soil produces statistically significant changes in the bacterial community.
Collapse
Affiliation(s)
- J Baxter
- Biomolecular and Biomedical Research Centre, School of Applied Sciences, Northumbria University, Newcastle-upon-Tyne, UK
| | | | | |
Collapse
|
25
|
Gallizia I, Vezzulli L, Fabiano M. Evaluation of different bioremediation protocols to enhance decomposition of organic polymers in harbour sediments. Biodegradation 2005; 16:569-79. [PMID: 15865348 DOI: 10.1007/s10532-004-0001-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The response of the microbial community (in term of abundance and enzymatic activity) was investigated to test the effect of different bioremediation protocols to naturally enhance decomposition of organic polymers in harbour sediments (Genoa Harbour, Italy, N-W Mediterranean). Bioremediation techniques tested were bioaugmentation (5 different microorganisms' inocula), biostimulation (air supply), and natural attenuation. The coupling bioaugmentation/biostimulation was also tested. After 60 days, following the bioaugmentation protocol, bacterial densities correlated to the quantities of inocula amended to the boxes, suggesting that allochthonous community was able to survive and multiply. However, while bioaugmentation alone seems not to be able to carry out significative degradation, its coupling with air insufflations produced the best response: here bacterial densities increased, especially in the water (from 2.3 x 10(7) to 3.50 x 10(8) cells ml(-1)), average cell size and enzymatic activities increased, and sedimentary organic matter was significantly depleted (PRT 5-folds reduction, CHO 1.5-folds reduction). The strong coupling observed between the sediment and water compartments together with the greatest microbial response observed in this latter suggest that the sediment-water interface may constitute a key compartment for the occurring of biodegradation processes in organic-rich sediments.
Collapse
Affiliation(s)
- Ilaria Gallizia
- Department for the study of territory and its resources (DIP.TE.RIS.), University of Genoa, Corso Europa 26, 16132 Genoa, Italy.
| | | | | |
Collapse
|