Evaluation of three lignocellulosic wastes as a source of biodegradable carbon for denitrification in treatment wetlands

Sánchez, Martha Patricia Olivas; Sulbarán-Rangel, Belkis; Tejeda, Allan; Zurita, Florentina

doi:10.1007/s13762-020-02815-9

Cited by 9 publications

(2 citation statements)

References 41 publications

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“…The denitrification process is disrupted by the lack of carbon sources and anoxic conditions [ 11 ]. Solutions to improve TN removal in VSSF TWs follow two strategies: feeding carbon by external sources such as lignocellulosic waste [ 12 ] or modifications in operation such as different feeding strategies and bottom saturation [ 10 , 13 ]. In terms of previously commented strategies, bottom saturation perhaps be the mostly likely to be implemented on full scale VSSF TWs.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands

Vera-Puerto

Valdés

Correa

et al. 2021

IJERPH

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The aim of this work was to evaluate the performance of vertical subsurface flow treatment wetlands (VSSF TWs) for treating rural domestic wastewater when strategies such as bed depth reduction and media change are used in combination with bottom saturation. Two treatment wetland systems were implemented: normal (VF-N), with a bed depth of 1.0 m, and modified (VF-M), with a bed depth of 0.5 m and a bottom layer of natural zeolite. Schoenoplectus californicus was used as experimental plant. These two treatment systems were operated at a hydraulic loading rate of 120 mm/d in two phases. Phase I did not use bottom saturation, while Phase II involved a bottom saturation of the zeolite layer of the VF-M system. The results show that bed depth reduction did not have a significant effect (p > 0.05) in terms of organic matter, solids, and ammonium removal. Conversely, it had a significant influence (p < 0.05) on phosphate as well as a negative effect on pathogen removal. This influence could be explained by initial media capacity for phosphorus removal and filtration importance in the case of pathogens. Partial saturation only had a positive influence on total nitrogen removal. The addition of a bottom layer of natural zeolite showed no positive effect on nutrient removal. The plant showed adaptation and positive development in both VF-N and VF-M. The water balance showed that water loss was not influenced by bed depth reduction. Therefore, according to the previous results, a combination of the proposal modifications to VSSF TWs can be introduced for treating rural domestic wastewater.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands

Vera-Puerto

Valdés

Correa

et al. 2021

IJERPH

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“…As a high-carbon solid carbon source, the plant carbon source has the advantages of sufficient source and low cost. It can continuously degrade and release organic substances under the action of microbial enzymes, and has the characteristics of long-term release and convenient administration after one addition, and has gradually become a research hotspot [8].…”

Section: Introductionmentioning

confidence: 99%

Application of Reeds as Carbon Source for Enhancing Denitrification of Low C/N Micro-Polluted Water in Vertical-Flow Constructed Wetland

Jin

Zhang

et al. 2022

Applied Sciences

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Constructed wetlands have been applied to micro-polluted rivers and lakes. However, they often show poor nitrogen removal efficiency due to insufficient carbon sources for complete denitrification in the waters. In this study, a vertical-flow wetland system was built, in which reeds as a carbon source were added in the middle layer of the substrate. Thereby, the effect of the reed carbon source on denitrification of micro-polluted rivers and lakes with a low C/N ratio in the wetland and the denitrification mechanism were studied. The results showed that the concentrations of NH4+-N, NO3−-N and NO2−-N in the effluent of the constructed wetland were reduced to 0.17–0.35, 0.20–0.49 and 0.01–0.02 mg/L after adding the reed carbon source, and the removal efficiencies of the system for NH4+-N and NO3−-N reached 93.84% and 84.69%, respectively. The abundances of nirK, nirS, hzo and nrfA genes in the wetland substrate increased by 95.51%, 54.96%, 52.89% and 731.95%, respectively, which was considered to be related to the enhanced denitrification, anammox and dissimilatory nitrate reduction to ammonium of the wetland system. Reed planting promoted the increased abundances of amoA and nxrB genes, which might play a positive role in enhancing nitrification in wetland systems. The result of this study may provide a theoretical basis for the ecological restoration of low C/N micro-polluted water bodies.

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Preliminary Evaluation of Three Species of Ligninolytic Fungi for Their Possible Incorporation in Vertical Flow Treatment Wetlands for the Treatment of Tequila Vinasse

Ramírez-Ramírez

Sulbarán-Rangel

Jáuregui-Rincón

et al. 2021

Water Air Soil Pollut

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Evaluation of three lignocellulosic wastes as a source of biodegradable carbon for denitrification in treatment wetlands

Cited by 9 publications

References 41 publications

Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands

Evaluation of Bed Depth Reduction, Media Change, and Partial Saturation as Combined Strategies to Modify in Vertical Treatment Wetlands

Application of Reeds as Carbon Source for Enhancing Denitrification of Low C/N Micro-Polluted Water in Vertical-Flow Constructed Wetland

Preliminary Evaluation of Three Species of Ligninolytic Fungi for Their Possible Incorporation in Vertical Flow Treatment Wetlands for the Treatment of Tequila Vinasse

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