“Cattle dung biochar-packed vertical flow constructed wetland for nutrient removal”: Effect of intermittent aeration and wastewater COD/N loads on the removal process

Chand, Naveen; Kumar, Kapil; Suthar, Surindra

doi:10.1016/j.jwpe.2021.102215

Cited by 16 publications

(5 citation statements)

References 63 publications

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“…Similar to this, more inorganic elements, such as Si and K, are present in CDDO‐BC than in CD‐BC. Overall evidence, therefore, supports the idea that the presence of inorganic materials in biomass might increase the number of uses for biochar produced from plants 56 . Additionally, CDDO‐BC was observed to contain bromine, while CD‐BC does not.…”

Section: Discussion Of Resultssupporting

confidence: 74%

“…The high nano‐porosity of CD‐BC is also known to enhance soil aeration and water retention 56,57 . All of the measured pore diameters fall within the mesoporous category.…”

Section: Discussion Of Resultsmentioning

confidence: 88%

“…The high nano-porosity of CD-BC is also known to enhance soil aeration and water retention. 56,57 All of the measured pore diameters fall within the mesoporous category. The biochars have a substantial surface area, which increases their potential for usage as fillers in plastic composites.…”

Section: Brunauer-emmett-teller Analysesmentioning

confidence: 91%

“…Overall evidence, therefore, supports the idea that the presence of inorganic materials in biomass might increase the number of uses for biochar produced from plants. 56 Additionally, CDDO-BC was observed to contain bromine, while CD-BC does not. In the past, similar accounts have been found in the literature.…”

Section: Energy Dispersive Spectroscopymentioning

confidence: 99%

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Thermochemical conversion of African balsam leaves‐cow dung hybrid wastes into biochar

Adeniyi

Iwuozor

Emenike

2022

Biofuels Bioprod Bioref

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African balsam (Daniella oliveri) leaves and cow dung are waste materials that are commonly accessible in Africa and can be used to produce biochar by simultaneous thermochemical processing. In this study, biochar was produced in a retort‐heated, non‐electrically powered, top‐lit updraft reactor using the biomass fuel‐powered thermochemical conversion of dried cow dung and African balsam leaves at an average temperature of 320 °C. The biochar was characterized using Fourier transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM), differential thermal analysis/thermogravimetric analysis (DTA/TGA), and Brunauer–Emmett–Teller (BET) analyses. After carbonization for 100 min, biochar was obtained from processed mixed leaves/cow dung with a yield of 70%. Fourier transform infrared analysis showed the presence of alkene, hydroxyl, alkyne, alkane, and sulfur‐containing functional groups. Scanning electron micrographs showed that the biochar's surface was made up of fibrillated particles with very few pores. The biochar was observed to have a surface area of 328.199 m2/g with a higher pore volume and lower pore size than biochar produced from cow dung alone. Energy dispersive spectroscopy showed that the biochar is mostly made up of carbon (67%), and that the introduction of the leaves into the biochar feedstock increased its carbon, silicon, potassium, and bromine content. Differential thermal analysis/thermogravimetric analyses revealed the biochar to be thermally stable. The findings of this study are helpful for attempts to manage solid wastes (African balsam leaves and cow dung), reduce environmental pollution, and produce biochar whose properties are adequate for it to be used as a soil additive. © 2022 Society of Chemical Industry and John Wiley & Sons, Ltd.

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Section: Discussion Of Resultssupporting

confidence: 74%

“…The high nano‐porosity of CD‐BC is also known to enhance soil aeration and water retention 56,57 . All of the measured pore diameters fall within the mesoporous category.…”

Section: Discussion Of Resultsmentioning

confidence: 88%

Section: Brunauer-emmett-teller Analysesmentioning

confidence: 91%

Section: Energy Dispersive Spectroscopymentioning

confidence: 99%

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Thermochemical conversion of African balsam leaves‐cow dung hybrid wastes into biochar

Adeniyi

Iwuozor

Emenike

2022

Biofuels Bioprod Bioref

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“…Recent studies indicate the potential of BC in substrate matrix in nutrient removals in vertical flow constructed wetlands (VFCWs). For example, A study by Chand et al [27], found that after the introduction of cattle dung BC in the substrate matrix, the removal of nutrients from sewage water enhanced in a significant way. In another study, Chand et al [3] demonstrated that cow dung BC amendment in the substrate matrix of VFCWs not only enhanced the nutrient removals in such setups but also reduced the coliform population to a safe level as decided by regulatory agencies.…”

Section: Introductionmentioning

confidence: 99%

Treatment of High Nutrient-Loaded Wastewater in a Constructed Floating Wetland with Different Configurations: Role of Lantana Biochar Addition

2022

Self Cite

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Constructed wetlands (CW) with carbon stock in substrate matrix show high efficiency in wastewater nutrient removals. In this study, five batch-scale CW setups with varying Lantana weed biochar (BC) doses (5, 10, and 15%) in substrate matrix were established and changes in high nutrient-loaded wastewater parameters, ammonium N (NH4+-N), chemical oxygen demand (COD), nitrate (NO3-N), sulfate (SO4−2), and phosphate (PO4−3), were monitored for 240 h hydraulic retention time (HRT). BC amount directly affected the removal mechanism of CWs and a significant reduction in COD (>92.71%) was recorded. CW setup with a 15% BC dose showed the maximum removal of PO4−3 (79.06%), NH4+-N (78.79%), SO4−2 (67.93%), and NO3-N (77.42%) from wastewater. The theory of BC facilitated physical removal, microbial facilitation, and chemical kinetics improvements are proposed for better removal of wastewater nutrients in studied CWs. Research results could be utilized to design a low-cost domestic wastewater treatment facility using BC for rural areas under a decentralized water treatment program.

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Improving the removal efficiency of nitrogen and organics in vertical-flow constructed wetlands: the correlation of substrate, aeration and microbial activity

Yang

Wang

et al. 2022

Environ Sci Pollut Res

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“Cattle dung biochar-packed vertical flow constructed wetland for nutrient removal”: Effect of intermittent aeration and wastewater COD/N loads on the removal process

Cited by 16 publications

References 63 publications

Thermochemical conversion of African balsam leaves‐cow dung hybrid wastes into biochar

Thermochemical conversion of African balsam leaves‐cow dung hybrid wastes into biochar

Treatment of High Nutrient-Loaded Wastewater in a Constructed Floating Wetland with Different Configurations: Role of Lantana Biochar Addition

Improving the removal efficiency of nitrogen and organics in vertical-flow constructed wetlands: the correlation of substrate, aeration and microbial activity

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