Electricity production and evolution of microbial community in the constructed wetland-microbial fuel cell

Xu, Fei; Cao, Fu-qian; Kong, Qiang; Zhou, Lulu; Yuan, Quan; Yan-peng, Zhu; Wang, Qian; Du, Yongling; Wang, Zhi-de

doi:10.1016/j.cej.2018.02.003

Cited by 279 publications

(54 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…removal of TN is similar to horizontal flow constructed wetlands and lower than vertical flow constructed wetlands (Dotro et al, 2017) (Kadlec and Wallace, 2009). The removal efficiencies are comparable with results reported by (L. Xu et al, 2016) but lower than 82% removal efficiency reported by (Xu et al, 2018a). The low TN removal is the results of the operation of tested systems under saturated regime, which given the anoxic conditions, the nitrification process is limited by the lack of O2;…”

Section: Effluent Water Quality and Correlation With Microbial Metabosupporting

confidence: 83%

“…The findings differ of those from Saz et al (2018), where in a CW-MFC, planted systems showed better performance than non-planted systems, reaching COD removal rates between 85% to 88%. The removal efficiencies of PK-A and PK-LSN systems are comparable to values reported by Fang et al (2017), where CW-MFC was able to remove COD loads of 90%, or with the values reported for a CW-MFC with assisted aeration with removal efficiencies above 82% (Xu et al, 2018a). TOC removal efficiencies ranged between 77 and 79%.…”

Section: Effluent Water Quality and Correlation With Microbial Metabosupporting

confidence: 82%

See 1 more Smart Citation

Microbial Community Function in Electroactive Biofilm-based Constructed Wetlands

Ramírez-Vargas

Arias

Zhang

et al. 2018

Preprint

View full text Add to dashboard Cite

<p><strong>Abstract.</strong> The performance enhancement of constructed wetlands can be achieved through the coupling with microbial electrochemical technologies (MET). MET is a setup designed to mimic metabolic electrons exchange with insoluble donors and acceptors with the aid of electroactive bacteria and external electrical circuits. An alternative MET that dispenses of electrodes and circuits but uses an electro-conductive biofilter is called Microbial Electrochemical-based Constructed Wetland (METland). Previously it has been demonstrated that a METland has higher biodegradation rates than horizontal flow constructed wetlands, however given its novelty there are still uncertainties related to the removal of pollutants, including their microbial activity. The genetic characterization of microbial communities of a METland is desirable, but is time and resource consuming, then a characterization alternative could be based on functional analysis of the microbial communities. Community-level physiological profile (CLPP) is a useful method to evaluate the functional diversity of microbial communities based on the carbon source utilization pattern (CSUP). Therefore, this study was focused on the microbial characterization of laboratory scale METland based on CLPP analysis. The study included the characterization of microbial communities attached to two carbon-based electro-conductive materials (calcined petroleum coke from crushed electrodes – PK-A; calcined petroleum coke with low sulphur and nitrogen content – PK-LSN), in planted and non-planted set-ups. Variations on the metabolic activity of tested systems were identified and it seems to be related to the characteristics of the material, rather than the presence/absence of plants. In general, CSUP show differences along flow pathway, as well as among the tested systems, being carbohydrates and carboxylic/acetic acids the most consumed carbon sources, followed by polymers, amides/amines and amino acids. Also, were established some correlations between the utilization of carbon sources and the removal of pollutants. The obtained results provide useful insight into the spatial dynamics of METland systems.</p>

show abstract

Section: Effluent Water Quality and Correlation With Microbial Metabosupporting

confidence: 83%

Section: Effluent Water Quality and Correlation With Microbial Metabosupporting

confidence: 82%

Microbial Community Function in Electroactive Biofilm-based Constructed Wetlands

Ramírez-Vargas

Arias

Zhang

et al. 2018

Preprint

View full text Add to dashboard Cite

show abstract

“…Constructed wetlands (CWs) are extensively used as an economical and environmentally friendly wastewater treatment method under ecological engineering technology [1,2]. CWs are artificial wastewater treatment systems that can be designed and controlled.…”

Section: Applications and Mechanism Of Constructed Wetlandsmentioning

confidence: 99%

Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Wang

Xie

et al. 2018

Water

Self Cite

View full text Add to dashboard Cite

Constructed wetlands (CWs) are extensively used as an economical and environmentally friendly sewage treatment under ecological engineering technology. Knowledge of the oxygen in the rhizosphere is of primary importance in understanding the function and regulation of microbial communities and macrophytes. Numerous studies on radial oxygen loss (ROL) have greatly elucidated the mechanism of contaminant removal in CWs. The main sources of oxygen in CWs are atmospheric reoxygenation, macrophyte transmission, and artificial aeration. However, artificial aeration is very expensive, and atmospheric reoxygenation is limited. Therefore, ROL by macrophytes is an essential and economical approach for oxygen input in CWs. In this review, we attempted to study the role of macrophytes in CWs. We described the mechanism of ROL and summarized the methods for determining ROL. We also investigated the role of ROL in contaminant removal in CWs. This review will provide considerable useful information on the oxygen input of CWs.

show abstract

“…Thus, habitat characteristics can affect the metabolic function of microbial communities, in contravention of the microbial distribution hypothesis of "random placement" [67]. Among the twelve metabolic categories studied here, amino acid and carbohydrate degradation/metabolism accounted for the greatest proportion [68]. The category of amino acid metabolism was underrepresented in SL, perhaps due to the strong capacity for nitrogen fixation and efficient nitrogen utilization at this site.…”

Section: Diversity Of Soil Bacterial Communities In Shelterbelts Of Dmentioning

confidence: 78%

Diversity and Functional Potential of Soil Bacterial Communities in Different Types of Farmland Shelterbelts in Mid-Western Heilongjiang, China

Zhang

Xin

Zhao

2019

Forests

View full text Add to dashboard Cite

The diversity and function of surface soil bacterial community in farmland shelterbelts of five forest types and one abandoned wilderness area were analyzed by collecting 36 soil samples at depths of 0–10 cm (the upper soil layer) and 10–20 cm (the lower soil layer), extracting DNA from the samples and amplifying and sequencing the bacterial 16S rDNA V3~V4 region. Dominant bacterial phyla in forest soils included the Actinomycetes, Proteobacteria, Acidobacteria, Chlorobacteria, and Bacillus. The number of unique bacterial OTUs (operational taxonomic units) was higher in the upper versus lower soil layer and greater in the abandoned cropland than in the shelterbelts. The number of total bacterial OTUs was highest in the mixed Pinus sylvestris var. mongholica Litv. and Larix gmelinii (Rupr.) Kuzen. forest. At the phyla level, Actinomycetes showed the greatest variation in abundance among forest types, while at the genus level, Actinoplanes varied most among forest types in the upper soil layer and Krasilnikovia varied most in the lower soil layer. Soil bacteria were more strongly correlated and more intense competition in the upper soil layer than in the lower soil layer; Actinoplanes and Krasilnikovia were key genera in bacterial networks. Functional predictions for bacterial community genes indicated that soil fertility potential was strong in the mixed Fraxinus mandshurica Rupr. and Larix gmelinii (Rupr.) Kuzen. forest, weak in the mixed Pinus sylvestris var. mongholica Litv. and Larix gmelinii (Rupr.) Kuzen. forest, and in the Populus×xiaohei forest, and intermediate in the Larix gmelinii (Rupr.) Kuzen. and Pinus sylvestris var. mongholica Litv. forests. This study provides a new theoretical basis for the sustainable management of soil fertility in the agroforestry system.

show abstract

Electricity production and evolution of microbial community in the constructed wetland-microbial fuel cell

Cited by 279 publications

References 34 publications

Microbial Community Function in Electroactive Biofilm-based Constructed Wetlands

Microbial Community Function in Electroactive Biofilm-based Constructed Wetlands

Constructed Wetlands: A Review on the Role of Radial Oxygen Loss in the Rhizosphere by Macrophytes

Diversity and Functional Potential of Soil Bacterial Communities in Different Types of Farmland Shelterbelts in Mid-Western Heilongjiang, China

Contact Info

Product

Resources

About