Nitrogen removal in vermifiltration: Mechanisms, influencing factors, and future research needs

Singh, Rajneesh; D’Alessio, Matteo; Jahangeer,; Meneses, Yulie E.; Bartelt–Hunt, Shannon L.; Ray, Chittaranjan

doi:10.1016/j.jenvman.2020.111868

Cited by 25 publications

(38 citation statements)

References 86 publications

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“…Arora, Rajpal, Kumar, et al (2014) have also made the same conclusion. This could be because the riverbed material ensured adequate HRT of wastewater inside the vermibed and imparted higher adsorptive properties due to the presence of fine sand with enhanced SSA (Singh, D'Alessio, et al, 2021).…”

Section: Strategies To Trigger the Performance Of Vf Technologymentioning

confidence: 99%

“…On the contrary, if the vermibed depth is less, the entire vermibed remains aerobic for obvious reasons, resulting in higher organic removal and enhanced nitrification of NH 4 + ‐N. However, owing to the absence of the anoxic or anaerobic condition, the denitrification potential of the VFs gets hindered, resulting in the reduction in nitrogen removal (Singh, D'Alessio, et al, 2021). For example, Singh, Bhunia, and Dash (2019a) have employed garden soil as the vermibed material, having a depth of 10 cm for treating brewery wastewater.…”

Section: Strategies To Trigger the Performance Of Vf Technologymentioning

confidence: 99%

“…Furthermore, being a waste material, dolochar is available in abundance at low or zero cost. Moreover, since the adsorption of P by dolochar is a physical process, it does not interfere with the organic and nitrogen removal mechanisms in the VFs (Singh et al, 2018; Singh, D'Alessio, et al, 2021).…”

Section: Strategies To Trigger the Performance Of Vf Technologymentioning

confidence: 99%

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Vermifiltration: Strategies and techniques to enhance the organic and nutrient removal performance from wastewater

Chowdhury

Bhunia

Surampalli

2022

Water Environment Research

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The vermifiltration (VF) technology has gained significant attention as a green alternative for remediating domestic and industrial wastewater over the last few decades. Of late, the implementation of various modifications to the orthodox VF technology, including tweaks in the design and operation of the vermifilters, has been portrayed in the available literature. However, owing to the scatteredness of the available information, the knowledge regarding the execution of the modified vermifilters is still inadequate. Hence, an effort has been made to comprehensively overview the innovative strategies and techniques adopted to improve the organic and nutrient removal potential of the VFs from wastewater. In addition, future perspectives have been recognized to design more efficient and sustainable VFs. This review explores more of such novel tactics to improve the performance of the VF technology regarding organic and nutrient removal from wastewater. Practitioner Points Innovative strategies and techniques implemented to VF technology were comprehensively overviewed. Design modification and advantages of each innovation were highlighted. The pollutant removal performance of every modification was emphasized. Modified vermifilters were better than the conventional vermifilters in terms of organic and nutrient removal from the wastewater.

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Section: Strategies To Trigger the Performance Of Vf Technologymentioning

confidence: 99%

Section: Strategies To Trigger the Performance Of Vf Technologymentioning

confidence: 99%

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Vermifiltration: Strategies and techniques to enhance the organic and nutrient removal performance from wastewater

Chowdhury

Bhunia

Surampalli

2022

Water Environment Research

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“…The effluent concentrations from the top, middle, and bottom layers of CMAVFs were 81.6 ± 2.2 mg/L, 13 ± 1 mg/L, and 2.4 ± 0.2 mg/L, respectively. Elevated NO 3 concentrations within the layers suggests the top layer of these reactors were actively converting NH 4 to NO 3 via nitrification 41 . The lower NO 3 concentration in layer 2 can be attributed to the removal of nitrate in the submerged and more anaerobic environment which was conducive to denitrification 42 .…”

Section: Nitrogen Removalmentioning

confidence: 99%

Effects of feeding mode on the performance, life span and greenhouse gas emissions of a vertical flow macrophyte assisted vermifilter

Singh

Ray

Miller³

et al. 2022

npj Clean Water

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This study was conducted to investigate the impact of intermittent feeding on performance, clogging, and gaseous emission on macrophyte assisted vermifiltration (MAVF) based treatment system. Synthetic slaughterhouse wastewater was applied to two different integrated vertical flow based MAVFs. Triplicates were used throughout the study. Eisenia fetida earthworms were added to MAVFs, and Carex muskingmenis plants were planted. Wastewater was applied to the reactors on 1) intermittent (8 h/day) (IMAVF) and 2) continuous (24 h/day) (CMAVF) basis. The average chemical oxygen demand, total nitrogen, and total phosphorous removals achieved by the IMAVF were 80.2 ± 1.6%, 53.9 ± 1.3% and 66.5 ± 1% respectively, and 68.3 ± 1.3%, 61.2 ± 1.4%, and 60.5 ± 1.4% by the CMAVF, respectively. The diffusion of air to the bedding of IMAVFs during no-flow conditions facilitated higher organics oxidation, adsorption of phosphorous, nitrification, and ammonification. At the end of the study, hydraulic conductivity of IMAVF and CMAVF were found to be 0.036 cm/s and 0.037 cm/s, respectively. CO2, CH4 and N2O emissions from IMAVF were 245.5 ± 38.0 mg C/m2, 5.0 ± 4.6 mg C/m2 and 2513.5 ± 2629.9 μg N/m2 respectively, while CO2, CH4 and N2O emissions from CMAVF were 123.3 ± 14.5 mg C/m2, 74.8±45.2 mg C/m2 and 328.4 ± 93.4 μg N/m2, respectively. Intermittent application of influent could be considered for improving the performance and lifespan of MAVFs, causing lower environmental footprints.

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“…Industrial development improves our life quality; nevertheless, the industries, such as those producing paper and pharmaceutical products, generate large amounts of industrial wastewater (Liang et al, 2021;Singh et al, 2021). Nitrogen is one of the main industrial wastewater pollutants (Sun et al, 2021), the spread of which pollutes the environment (Chen et al, 2018), damages the ecosystem, and affects human health (Liu et al, 2021 in wastewater mainly comprise inorganic nitrogen and organic nitrogen (Odedishemi Ajibade et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

et al. 2021

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The discharge of excess nitrogenous pollutants in rivers or other water bodies often leads to serious ecological problems and results in the collapse of aquatic ecosystems. Nitrogenous pollutants are often derived from the inefficient treatment of industrial wastewater. The biological treatment of industrial wastewater for the removal of nitrogen pollution is a green and efficient strategy. In the initial stage of the nitrogen removal process, the nitrogenous pollutants are converted to ammonia. Traditionally, nitrification and denitrification processes have been used for nitrogen removal in industrial wastewater; while currently, more efficient processes, such as simultaneous nitrification-denitrification, partial nitrification-anammox, and partial denitrification-anammox processes, are used. The microorganisms participating in nitrogen pollutant removal processes are diverse, but information about them is limited. In this review, we summarize the microbiota participating in nitrogen removal processes, their pathways, and associated functional genes. We have also discussed the design of efficient industrial wastewater treatment processes for the removal of nitrogenous pollutants and the application of microbiome engineering technology and synthetic biology strategies in the modulation of the nitrogen removal process. This review thus provides insights that would help in improving the efficiency of nitrogen pollutant removal from industrial wastewater.

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Nitrogen removal in vermifiltration: Mechanisms, influencing factors, and future research needs

Cited by 25 publications

References 86 publications

Vermifiltration: Strategies and techniques to enhance the organic and nutrient removal performance from wastewater

Vermifiltration: Strategies and techniques to enhance the organic and nutrient removal performance from wastewater

Effects of feeding mode on the performance, life span and greenhouse gas emissions of a vertical flow macrophyte assisted vermifilter

Advances in Studies on Microbiota Involved in Nitrogen Removal Processes and Their Applications in Wastewater Treatment

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