Use of biochar to enhance constructed wetland performance in wastewater reclamation

Gupta, Prabuddha; Ann, Tae Woong; Lee, Seung Mok

doi:10.4491/eer.2015.067

Cited by 125 publications

(60 citation statements)

References 71 publications

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“…In the second and third stage the larger values indicate the performance of Typha Latifolia is convinced from the observed values. 8,9 The similar results are discussed by many researchers. [15][16][17][18] (a) (b) …”

Section: Resultssupporting

confidence: 76%

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Sustainability of Constructed Wetlands in Using Biochar for Treating Wastewater

2017

RJC

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Constructed wetland (CW) is a reliable, cost effective and sustainable technology for the treatment of different sorts of wastewater via different treatment processes including biological, chemical and physical processes. Coconut Shell (CS) as Biochar was obtained through decomposition of organic material without oxygen. It offers simple, cost effective strategies to treat wastewater and decrease carbon footprint. Consolidation of both (Constructed wetland and Biochar) technologies was adopted to increase the productivity in the treatment of domestic wastewater. Reduction of parameters like nitrogen, pH, turbidity other physicochemical parameters from wastewater using biochar from coconut shell was investigated by mixing the biochar with the wetland soil. Further, in this study analyzed the effect of biochar on the growth of the plants in the wetland(Typha latifolia). The biochar amended wetlands showed greater removal efficiencies of 99.9% and 85% in turbidity and TDS, respectively as compared to the normal wetlands which exhibited an efficiency of 98% and 77.7% in removing turbidity and TDS, respectively.

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Section: Resultssupporting

confidence: 76%

“…The characteristics of biochar vastly vary depending upon the feedstock, temperature, duration, and method of pyrolysis with BOD, COD, turbidity and related analysis. [6][7][8][9] BIOCHAR FOR TREATING WASTEWATER M. Vidya Vijay et al…”

Section: Introductionmentioning

confidence: 99%

Sustainability of Constructed Wetlands in Using Biochar for Treating Wastewater

2017

RJC

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“…Mohan et al (2014) reported that biochar added into the soil could increase nutrient availability, microbial activity, soil organic matter, water retention and crop production. In laboratory scale, Gupta et al (2015) compared the efficiency of biochar media made from Oak tree (Quercus sp) and gravel in CWs planted with Canna sp for nitrogen removal from synthetic wastewater. The results showed that nitrogen removal was higher in the CW with biochar media.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen removal from sewage and septage in constructed wetland mesocosms using sand media amended with biochar

Rozari

Greenway

Hanandeh

2018

Ecological Engineering

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Biochar has been identified as a media amendment to improve nutrient removal from wastewater, and N retention and plant growth in agroforestry. It therefore has the potential for treating domestic wastewater. The aim of this research was to compare nitrogen removal and plant growth in pure sand and sand amended with biochar, in wetland mesocosms (240 L) receiving sewage. There were seven media treatments based on the proportions of biochar in the sand media (100% sand, sand and coir peat, 5, 10, 15, 20, 25% biochar). The plant species were Paperback tree (Melaleuca quinquenervia) and Lemongrass (Cymbopogon citratus). The mesocosms were continuously loaded for 8 months with secondary clarified wastewater (SCW) (16 L/day). Septage was then intermittently loaded (20 L/2 days) for a further 8 months. Inflow and outflow samples were monitored for TN, NH 4-N, and NO x-N. All treatments showed good nitrogen removal efficiency. Average removal efficiencies of TN, NO x-N and NH 4-N in the mesocosms loaded with SCW ranged from 71 to 87%, 81 to 93% and 65 to 79%, for 100% Sand to 25% Biochar respectively. For septage, the removal efficiencies ranged from 63 to 81%, 69 to 87% and 66 to 81%, for 100% Sand to 25% Biochar respectively. Significant differences of nitrogen outflow concentrations were observed between pure sand and sand amended with biochar. Physical chemical properties of the biochar would have facilitated microbial processes and adsorption. Strong positive correlations were observed between biochar content in the media and nitrogen removal rates. The increased nitrogen removal may be attributed to higher mineralisation of organic nitrogen and NH 4-N, especially in the case of septage where strong correlation was observed between BOD 5 and TN removal. Total N biomass in the plants harvested after 21 months ranged from 13.4-14.0 g N. The addition of biochar did not increase plant N biomass in either species.

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“…Limited literature is found about the effect of biochar on the performance of constructed wetlands to remove phosphorus from wastewater (Gupta et al 2015). However, these studies were conducted in controlled laboratory scale environment and mostly using synthetic wastewater.…”

Section: Introductionmentioning

confidence: 98%

Phosphorus removal from secondary sewage and septage using sand media amended with biochar in constructed wetland mesocosms

Rozari

Greenway

Hanandeh

2016

Science of The Total Environment

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To improve the performance efficiency of subsurface constructed wetlands (CWs), a variety of media have been tested. Recently, there has been a rising interest in biochar. This research aims to develop the effectiveness of sand media amended with biochar and two plants species (Melaleuca quinquenervia and Cymbopogon citratus) in removing phosphorus from sewage effluent in CWs. The experimental design consisted of vertical flow (VF) mesocosms with seven media treatments based on the proportions of biochar in the sand media which ranged from 0 to 25% by volume. During the first 8months, the mesocosms were loaded with secondary clarified wastewater (SCW) then septage was used for the remaining 8months. Inflow and outflow were monitored for total phosphorus (TP) and PO4-P. Plants were harvested at the end of the experiment and TP biomass was determined. Removal efficiencies of TP in the mesocosms loaded with SCW and septage ranged from 42 to 91% and 30 to 83%, respectively. Removal efficiencies of PO4-P ranged from 43 to -92% and 35 to 85% for SCW and septage, respectively. The results revealed that the sand media performed better than the biochar-amended media; increasing the proportion of biochar in the media decreased removal efficiency of phosphorus. However, after flushing due to major rain event, there was no significant difference between sand and sand augmented with 20% biochar. Total plant P ranged from 1.75g in the 20% biochar mesocosm to 2.10g in the sand only mesocosm. Plant uptake of P, at least in part, may be accredited for the better P removal efficiency in the sand media compared to the biochar-amended media.

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Use of biochar to enhance constructed wetland performance in wastewater reclamation

Cited by 125 publications

References 71 publications

Sustainability of Constructed Wetlands in Using Biochar for Treating Wastewater

Sustainability of Constructed Wetlands in Using Biochar for Treating Wastewater

Nitrogen removal from sewage and septage in constructed wetland mesocosms using sand media amended with biochar

Phosphorus removal from secondary sewage and septage using sand media amended with biochar in constructed wetland mesocosms

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