Vermifiltration as a sustainable natural treatment technology for the treatment and reuse of wastewater: A review

Singh, Rajneesh; Samal, Kundan; Dash, Rajesh Roshan; Bhunia, Puspendu

doi:10.1016/j.jenvman.2019.06.075

Cited by 59 publications

(56 citation statements)

References 100 publications

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“…Thus, the pathogens present in a hostile environment, halted and facing a lack of food, ultimately are destroyed off. It also helps in mineralization of the effluent and vermicast (Arora et al, 2014b;Singh et al, 2019Singh et al, , 2018 .…”

Section: Discussionmentioning

confidence: 99%

Design, performance evaluation and investigation of the dynamic mechanisms of earthworm-microorganisms interactions for wastewater treatment through vermifiltration technology

Arora¹,

Saraswat²,

Mishra³

et al. 2020

Bioresource Technology Reports

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The present study points to the relevance of the earthworms-microorganism"s symbiotic and synergistic interactions that drive the wastewater treatment by identifying the most essential mechanisms underlying the removal of contaminants during vermifiltration technology. Previous studies have showed the presence of earthworms improves treatment performance of vermifilter (VF), but earthworm microbial community dynamics, their structure and functional characteristics in VF were not fully investigated. To investigate the effects of earthworms on the inherent microbial community of the VF, the present study envisages the dynamics of the complex symbiosis of earthworms & microorganisms associated to the treatment mechanisms. In this study, the design, operations and performance evaluation and influent, effluent and filter media layer were investigated for microbial diversity inside the earthworm population, along with the antimicrobial activity, enzymatic activity, and protein profiling assays. The results showed that earthworm gut microbial communities were dominated by Gammaproteobacteria, and the percentages arrived to 59-60% of the microbial species detected, while filter media layer showed presence of Firmicutes and Actinobacteria. The protein profiling of the microbiota associated with the VF showed that earthworms feeding and earthworm-microorganism . CC-BY-NC 4.0 International license available under a (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made interaction were responsible for enhanced treatment performance. The finding provides an insight into the complex earthworm microbial dynamics and mechanisms for wastewater treatment in VF. Furthermore, earthworm predation strongly regulated microbial biomass while improving microbial activity, and is deciphered as the possible mechanisms behind the vermifiltration technology.

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Section: Discussionmentioning

confidence: 99%

Design, performance evaluation and investigation of the dynamic mechanisms of earthworm-microorganisms interactions for wastewater treatment through vermifiltration technology

Arora¹,

Saraswat²,

Mishra³

et al. 2020

Bioresource Technology Reports

View full text Add to dashboard Cite

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“…Various wastewater purification and treatment methods with technical, economic, and environmental advantages have been developed and used, such as dry desulfurization of MnOx hydrothermally loaded halloysite desulfurizer [ 8 ], vermifiltration recently identified as one of the best sustainable, natural, and ecofriendly technology for wastewater treatment [ 9 ], elimination of chlorinated VOCs by using HCl-tolerant HxPO 4 /RuOx-CeO 2 catalysts [ 10 ]. Wetlands, considered to be inexpensive and having a wide variety of applications for domestic, agricultural, and industrial waters, can also be used for wastewater treatment [ 11 ], in addition to ozonation, precipitation, coagulation, flocculation, and adsorption.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Ziziphus lotus’ Activated Carbon and Evaluation of Its Adsorption Potential

Touzani

Fikri-Benbrahim

Ahlafi

et al. 2022

Journal of Environmental and Public Health

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This study aims to prepare activated carbon from an interesting biomaterial, corresponding to the cores of Ziziphus lotus, for the first time to the best of our knowledge, according to a manufacturing process based on its chemical and thermal activation. These cores were chemically activated by sulfuric acid for 24 h and then carbonized at 500°C for 2 hours. The obtained activated carbon was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectroscopy, and Brunauer–Emmett–Teller (BET) analysis. The adsorption of methylene blue (MB) on the activated carbon was evaluated, by Langmuir and Freundlich models examination, in order to explain the adsorption efficiency in a systematic and scientific way. Moreover, pseudo-first-order and pseudo-second-order kinetic models were used to identify the mechanisms of this adsorption process. The characterization results showed an important porosity (pore sizes ranging from 10 to 45 µm), a surface structure having acid groups and carboxylic functions, and a specific surface of 749.6 m2/g. Results of the MB adsorption showed that this process is very fast as more than 80% of MB is adsorbed during the first 20 minutes. In addition, increasing the contact time and temperature improves the MB removal process efficiency. Moreover, this adsorption’s kinetic modeling follows the pseudo-second-order model. Furthermore, data on the adsorption isotherm showed a maximum adsorption capacity of 14.493 mg/g and fit better with the Langmuir model. The thermodynamic parameters (∆G0, ∆S0, and ∆H0) indicate that the adsorption process is endothermic and spontaneous. Therefore, Ziziphus lotus can be used as a low-cost available material to prepare a high-quality activated carbon having a promising potential in the wastewater treatment.

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“…activated sludge (AS). VF is also cheaper and less technical, engineering-intensive to install and operate (Singh et al 2019). The study uses the international standards for LCA (ISO 14040 2006) and focuses also in obtaining important data related with the different life cycle phases for the vermifiltration technology in an environmental sustainability perspective.…”

Section: Introductionmentioning

confidence: 99%

Life-cycle assessment of decentralized solutions for wastewater treatment in small communities

Lourenço

Nunes

2021

Water Science and Technology

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This study benchmarks vermifiltration (VF) as secondary wastewater treatment in three natured-based decentralized treatment plants using life-cycle assessment. The comparison is justified by the comparatively easier and cheaper operation of VF when compared to more traditional technologies, including small rate infiltration (SRI), constructed wetlands (CW), and activated sludge (AS). Standard life cycle assessment was used and applied to three case-studies located in southern Europe. Material intensity during construction was highest for VF, but impacts during operation were lower, compensating those of the other phases. Impacts during the construction phase far outweigh those of operation and dismantling for facilities using constructed wetlands and activated sludge, when the number of served inhabitants is small, and due to lack of economies of scale. VF used as secondary treatment showed to contribute to reduce the environmental impacts, mainly in constructed wetlands and activated sludge. The replacement of CW by VF seems to bring important environmental benefits in most impact categories, in particular in the construction phase. The replacement by VF in facilities with SRI seems to result in the improvement of some of the impact categories, in particular in the operation phase. As for dismantling, no conclusive results were obtained.

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Vermifiltration as a sustainable natural treatment technology for the treatment and reuse of wastewater: A review

Cited by 59 publications

References 100 publications

Design, performance evaluation and investigation of the dynamic mechanisms of earthworm-microorganisms interactions for wastewater treatment through vermifiltration technology

Design, performance evaluation and investigation of the dynamic mechanisms of earthworm-microorganisms interactions for wastewater treatment through vermifiltration technology

Characterization of Ziziphus lotus’ Activated Carbon and Evaluation of Its Adsorption Potential

Life-cycle assessment of decentralized solutions for wastewater treatment in small communities

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