Plant-endophyte synergism in constructed wetlands enhances the remediation of tannery effluent

2018 ◽  
Vol 77 (5) ◽  
pp. 1262-1270 ◽  
Author(s):  
Sobia Ashraf ◽  
Muhammad Afzal ◽  
Khadeeja Rehman ◽  
Muhammad Naveed ◽  
Zahir Ahmad Zahir
Keyword(s):  
Industrial Wastewater ◽  
Bacterial Population ◽  
Ecological Engineering ◽  
Tannery Effluent ◽  
Inorganic Contaminants ◽  
Bacterial Strains ◽  
Severe Damage ◽  
Similar Reduction ◽  
Combined Action ◽  
Brachiaria Mutica

Abstract Liquid effluent produced from tanning industries is loaded with organic and inorganic contaminants, particularly heavy metals, which may cause severe damage to the ecosystem. Constructed wetland (CW) is a promising product of the research in the field of ecological engineering which helps to overcome aquatic pollution. This investigation aims to develop a plant–endophyte synergism in CW for the efficient remediation of tannery effluent. In a vertical flow CW, Brachiaria mutica was vegetated and augmented with three endophytic bacterial strains. Results showed a reduction of 82% in COD, 94% in BOD5, and 95% in Cr by plant–endophyte synergism in CWs and it was significantly higher than the use of plants alone. Similarly, nutrients (N and P), lipids, ion content, SO42−, and Cl− showed similar reduction by the combined action of endophytes and B. mutica in CWs. The endophytes inoculation enhanced bacterial population in different compartments of the plants vegetated in CWs and the maximum was observed in the roots. This study revealed that plant–endophyte synergism in CWs can enhance the remediation of industrial wastewater.

scholarly journals B-Cyclodextrin Polyurethanes Copolymerised with Beetroot Fibers (Bio-Polymer), for the Removal of Organic and Inorganic Contaminants from Water

2013 ◽  
Vol 2 (1) ◽  
pp. 150 ◽  
Author(s):  
Jamil Rima ◽  
Karine Assaker
Keyword(s):  
Heavy Metals ◽  
Methylene Blue ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Water Treatment ◽  
Aromatic Hydrocarbons ◽  
Rhodamine B ◽  
Industrial Wastewater ◽  
Contaminated Groundwater ◽  
Inorganic Contaminants ◽  
Polycyclic Aromatic

<p>In this study, B-Cyclodextrinn polymerized with beetroot fibers (Bio-polymer), was prepared and applied to the removal of organic and inorganic contaminants from wastewater. An investigation into the use of cross-linked cyclodextrin polyurethanes copolymerised with beetroot fibers as adsorbents for organic pollutants and heavy metals has yielded very useful results which may have an impact in future water treatment applications.</p> The Biopolymer was tested in water contaminated by dyes, polycyclic aromatic hydrocarbons (PAH) and heavy metals. The effectiveness to eliminate dyes such as methylene blue and Rhodamine B with concentrations around 100 ppm was more than 99%, while the pyrene,which was chosen as an example among PAHs, showed a potential of elimination exceeding the 97% for solutions of 10 ppm. Also, heavy metals, such as Lead, Zn, and Cu, were tested and showed an efficacy exceeding the 99.8%. The results indicated that the biopolymer developed in this study has the potential to be a promising material for the removal of mixed pollutants from industrial wastewater or from contaminated groundwater.

scholarly journals Biophysical and Characterizations of Silver Nanoparticles used as Salmonella typhi Detector

2014 ◽  
Vol 2 (4) ◽  
pp. 510-515
Author(s):  
Hala Moustafa Ahmed
Keyword(s):  
Silver Nanoparticles ◽  
Salmonella Typhi ◽  
Bacterial Strains ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Vis Spectroscopy ◽  
Combined Action ◽  
Hog Plum ◽  
Transmission Electronmicroscopy

The present study mainly focuses of combined action of Nepali hog plum as well as citrate synthesized silver nanoparticles (AgNPs) and Amikacin, as an antibiotic. The synergistic actions of citrate stabilized silver nanoparticles (AgNPs with chem) were compared with that of Nepali hog plum Choerospondia saxillaris (Lapsi) synthesized silver nanoparticles (AgNPs with plant), together with action of antibiotic onselected bacterial strains of Salmonella typhi. The synthesized AgNPs were characterized through UV-Vis spectroscopy, Transmission electronmicroscopy and X-ray diffraction technique. The size of the synthesized silver nanoparticles was measured by Transmission Electron Microscope (TEM) and X-ray diffraction (XRD).DOI: http://dx.doi.org/10.3126/ijasbt.v2i4.11127 Int J Appl Sci Biotechnol, Vol. 2(4): 510-515 

scholarly journals High Strength Wastewater Reclamation Capacity of Vetiver Grass in Tropics: The Case of Ethiopia

2021 ◽  
Vol 15 ◽  
pp. 117863022110601
Author(s):  
Mekonnen Birhanie Aregu ◽  
Negasa Eshete Soboksa ◽  
Girum Gebremeskel Kanno
Keyword(s):  
Constructed Wetland ◽  
Retention Time ◽  
Industrial Wastewater ◽  
Translocation Factor ◽  
High Strength ◽  
Control Group ◽  
P Value ◽  
Tannery Effluent ◽  
Vetiver Grass ◽  
Wastewater Reclamation

It is generally accepted that industrial wastewater like tannery effluent is high strength wastewater. The aim of this study was to examine the capacity of Vetiver grass for the treatment of high strength wastewater in a constructed wetland. Two constructed wetland beds were designed and one of them was not planted used as a control group. The grass was planted with 20 cm by 20 cm distance from each seedling. The biometric characteristics of Vetiver grass was evaluated by taking randomly selected clusters of the grass. The concentration of chromium in the extract of parts of the grass was determined by atomic absorption spectrophotometer. The Chromium bioaccumulation and Translocation factor was estimated. Composite samples before and after treatment of 4 different hydraulic retention time was collected. The physiochemical analysis of the wastewater has been carried out. The constructed wetland bed with Vetiver grass performed that, BOD, COD, NH4-N, NO3-N, TN, PO4-P, and TP were reduced at the retention time of 9 days by 91.9%, 96.3%, 62%, 86%, 88.7%, 96.3%, and 92.2% respectively. Chromium was also reduced by 97% at retention time of both 7 and 9 days over the planted bed. The bed with plant performs significantly better than without plant at P-value <.01. Therefore, Vetiver grass has a capacity to reclaim high strength industrial wastewater in tropical areas.

scholarly journals A tunable multicellular timer in bacterial consortia

2020 ◽  
Author(s):  
Carlos Toscano-Ochoa ◽  
Jordi Garcia-Ojalvo
Keyword(s):  
Collective Behavior ◽  
Bacterial Population ◽  
Single Cells ◽  
Bacterial Strains ◽  
Intracellular Space ◽  
Bacterial Consortia ◽  
Robust Implementation ◽  
Time Encoding ◽  
Stationary Conditions ◽  
Molecular Components

Processing time-dependent information requires cells to quantify the durations of past regulatory events and program the time span of future signals. Such timer mechanisms are difficult to implement at the level of single cells, however, due to saturation in molecular components and stochasticity in the limited intracellular space. Multicellular implementations, on the other hand, outsource some of the components of information-processing circuits to the extracellular space, and thereby might escape those constraints. Here we develop a theoretical framework, based on a trilinear coordinate representation, to study the collective behavior of a three-strain bacterial population under stationary conditions. This framework reveals that distributing different processes (in our case the production, detection and degradation of a time-encoding signal) across distinct bacterial strains enables the robust implementation of a multicellular timer. Our analysis also shows the circuit to be easily tunable by varying the relative frequencies of the bacterial strains composing the consortium.

Assessing the Ability to Treat industrial Wastewater by Constructed Wetland Model Using the Brachiaria mutica

2020 ◽  
Vol 11 (10) ◽  
pp. 5615-5626 ◽  
Author(s):  
Thi Van Thanh Ho ◽  
Minh Pham Dang ◽  
Thoa Lu Tu ◽  
Tai Huynh Thien ◽  
Long Giang Bach
Keyword(s):  
Constructed Wetland ◽  
Industrial Wastewater ◽  
Brachiaria Mutica

Bacterial diversity in antibiotic wastewater treatment

2013 ◽  
Vol 68 (12) ◽  
pp. 2676-2682 ◽  
Author(s):  
J. Han ◽  
L. Y. Wang ◽  
B. Y. Cai
Keyword(s):  
Wastewater Treatment ◽  
Bacterial Diversity ◽  
Industrial Wastewater ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Diversity Index ◽  
Batch Reactor ◽  
Community Analysis ◽  
Bacterial Strains ◽  
Wiener Diversity Index ◽  
Gradient Gel Electrophoresis

The bacterial diversity of an antibiotic industrial wastewater treatment system was analyzed to provide the information required for further optimization of this process and for identification of bacterial strains that perform improved degradation of antibiotic industrial wastewater. The total bacterial DNA of samples collected at three stages (aeration, precipitation, and idle) during the sequencing batch reactor (SBR) process were analyzed by polymerase chain reaction–denaturing gradient gel electrophoresis (PCR-DGGE) of the 16 s rDNA V3 regions. Community analysis was conducted in terms of the richness value (S), the dominance degree and the Shannon–Wiener diversity index (H). Rich bacterial diversity was apparent in the aeration stage of the SBR process, and the number of bands in the aeration stage was more abundant than that in the precipitation and idle stages. The DGGE analysis showed 15 bands, six of which were uncultured bacteria, and included one anaerobic and five aerobic bacteria. The microbial community in the aeration stage was the most complex of the whole SBR process, while the dominant bacteria differed in each reaction stage. These results demonstrate the cyclical dynamic changes in the bacterial population during the SBR process for the treatment of antibiotic industrial wastewater.

scholarly journals Isolation and Characterization of Chromate Resistant and Reducing Bacteria from Tannery Effluent of Chittagong, Bangladesh

1970 ◽  
Vol 17 ◽  
pp. 71-76
Author(s):  
M Fakruddin ◽  
Reaz Mohammad Mazumder ◽  
Towhida Khanom Tania ◽  
Saiful Islam ◽  
Meher Nigad Nipa ◽  
...  
Keyword(s):  
Atomic Absorption Spectrophotometry ◽  
Luria Bertani ◽  
Tannery Effluent ◽  
Bacterial Strains ◽  
E Coli ◽  
Absorption Spectrophotometry ◽  
Isolation And Characterization ◽  
Enzymatic Reduction ◽  
Reducing Bacteria

Context: Waste water containing Chromium (Cr6+) is by far the most important environmental challenge being faced. Objectives: The present study was planned on the isolation and characterization of chromate resistant and reducing bacterial strains in order to use them for detoxification of chromate.Materials and Methods: Water samples were collected to isolate microorganisms from tannery effluent of Baluchara, Chittagong and inoculated into Luria-Bertani medium with added Cr6+ as K2Cr2O7. The organisms have been identified and studied for Cr6+ reduction-ability in growth dependent manner.Results: A total of 35 isolates have been selected as potential organism belonging to the species of Moraxella (14.3%), Bacillus (11.43%), Streptococcus (25.72%), Staphylococcus (5.7%), Salmonella (12.3%), E. coli (13.3%), Enterobacter (11.3%), Hafnia alvei (2.45%) and Alcaligenes (3.5%). The selected isolates were able to tolerate at least 500 mg/l of Cr6+. The total Cr6+ concentration of the effluent sample analysed was found to be about 23.73 mg/l as determined by Atomic Absorption Spectrophotometry. Two of the isolates reduced 38% and 32% of Cr6+ added to the medium. Another 7 isolates showed Cr6+; reducing capability ranging from 18 to 22%.Conclusion: As the isolates have turned out to successfully reduce Cr6+ in this study, these can be used for the development of bioremediation process. Key words: Enzymatic reduction; Bioremediation; Chromium; Ecotoxicity; Tannery.DOI: 10.3329/jbs.v17i0.7104J. bio-sci. 17: 71-76, 2009

scholarly journals The bacterial population adherent to plant particles in the rumen of reindeer fed lichen, timothy hay or silage

Rangifer ◽  
1998 ◽  
Vol 18 (2) ◽  
pp. 55 ◽  
Author(s):  
Monica Alterskjær Olsen ◽  
Svein Disch Mathiesen
Keyword(s):  
Carboxymethyl Cellulose ◽  
Rangifer Tarandus ◽  
Bacterial Population ◽  
Anaerobic Bacteria ◽  
Negative Influence ◽  
Cellulolytic Bacteria ◽  
Bacterial Strains ◽  
Butyrivibrio Fibrisolvens ◽  
Rangifer Tarandus Tarandus ◽  
Wet Weight

Male reindeer (Rangifer tarandus tarandus) calves taken from a natural winter pasture were given ad lib. access to lichen (n = 3), timothy silage (n = 3) and hay (n = 3) for 7 weeks. Median numbers of viable anaerobic bacteria adherent to the plant particles (cells/g wet weight of rumen solids), growing on a habitat simulating medium (M8V), were significantly higher (P = 0.05) in the rumen of reindeer fed lichen (26.5 x 109- 53.0 x 109) and hay (4.0 x 109- 40.5 x 109), compared to reindeer fed silage (1.15 x 109 - 3.25 x 109). Anaerobic bacterial strains (n = 551) from the plant particles obtained from the rumen of the nine reindeer examined, were isolated using an acid swollen cellulose medium (M8SC) and tested for their ability to hydrolyse carboxymethyl cellulose (CMC). The proportion of CMC hydrolysing adherent bacteria isolated from M8SC was significantly higher in reindeer fed hay (21.5%) compared ro animals fed lichen (5.3%) and silage (2.7%) (P = 0.05). The CMC hydrolysing bacterial srrains (n=42) isolated from reindeer fed hay where characterised as non-cellulolytic Butyrivibrio fibrisolvens (9.5%), cellulolytic B. fibrisolvens (50.0%), Clostridium sp. (2.4%) and unknowns (38.1%), while CMC hydrolysing strains (n=11) isolated from animals fed lichen and strains (n=4) isolated from animals fed silage where all characterised as B. fibrisolvens. None of the bacterial strains isolated from the rumen solids of reindeer fed lichen or silage were found to be cellulolytic. This study suggests that both lichen and timothy silage have a negative influence, compared to hay, on the numbers of cellulolytic bacteria adherent to the plant particles in the rumen of reindeer.

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