Performance evaluation of vermifilter at different hydraulic loading rate using river bed material

Kumar, Tarun; Rajpal, Ankur; Bhargava, Renu; Prasad, Kollur Shiva

doi:10.1016/j.ecoleng.2013.10.028

Cited by 82 publications

(35 citation statements)

References 13 publications

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“…[11] This fluid has antibacterial properties, which destroy all the pathogens from the media in which it inhabits. [28][29][30] It is also been reported that earthworms devour on the pathogens found in the wastewater and promote the development of some bacteria and fungi, which are capable of producing antibiotics, that kills the pathogens. [11] The removal of pathogens, FC and E. coli from wastewater appear to be much more rapid when they are processed by E. fetida.…”

Section: Indicator Bacteria Removal Kineticsmentioning

confidence: 99%

“…[31] The filter media is rich in its microbial ecology and hosts environment for diverse and dense microflora, due to which the system inside VF is very complex and heterogeneous. [29] There is a resistance by indigenous microflora to any new addition, [32] which develops a competition for space and nutrients that limits the pathogen survival in the filter bed.…”

Section: Indicator Bacteria Removal Kineticsmentioning

confidence: 99%

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Pathogen removal during wastewater treatment by vermifiltration

Arora

Rajpal

Kumar

et al. 2014

Environmental Technology

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The study was designed to determine the effect of earthworms and the mechanism behind removal of pathogens during wastewater treatment by vermifiltration. The experimental phase continued for 10 weeks, starting after the initial stabilization phase of one week. Significant organic matter degradation and coliform removal were observed during vermifiltration of domestic wastewater. It was observed that vermifilter (VF) reduced biochemical oxygen demand and chemical oxygen demand by 84.8% and 73.9%, respectively. Significant log removal was observed for total coliforms (TC), faecal coliforms (FC), faecal streptococci (FS) and Escherichia coli with a mean log removal value (K) of 2.92, 2.20, 1.85 and 1.68, respectively. The decay rate constant (k) for indicator organisms (TC, FC and FS) was observed to be high as 8.04, 6.59 and 5.55 m day(-1), respectively. The population of total heterotrophic bacteria, total fungi and actinomycetes reduced remarkably by 3.14, 1.29 and 2.13 log units, respectively. Antibacterial activity of the isolated microorganisms from VF against gram-positive Staphylococcus aureus (ATCC 29213) and gram-negative E. coli (ATCC 25922) was observed which indicated the existence of a mechanism that may be responsible for pathogen removal during wastewater treatment. This demonstrated the production of antibacterial substance, from the microorganisms associated with earthworms, that causes inhibition of other microbes, specifying the effect of earthworms for pathogen removal. Overall, the present study contributes to the understanding of mechanism for pathogen removal during vermifiltration through antibacterial action of microflora.

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Section: Indicator Bacteria Removal Kineticsmentioning

confidence: 99%

Section: Indicator Bacteria Removal Kineticsmentioning

confidence: 99%

Pathogen removal during wastewater treatment by vermifiltration

Arora

Rajpal

Kumar

et al. 2014

Environmental Technology

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“…Hughes et al (2009) also reported that ammonia had very low toxicity on the survival of earthworms in vermifilter. The potential of vermifilter using river bed material for the treatment of domestic wastewater, at different hydraulic loading rates, has been investigated (Kumar et al 2014). Additionally, a comparative study was performed with vermifilter containing the earthworm species (Eisenia fetida), parallel to a geofilter (without earthworms) for the enhanced treatment of the wastewater.…”

Section: Physicochemical Characteristicsmentioning

confidence: 99%

Appropriate technology for domestic wastewater management in under-resourced regions of the world

Oladoja

2016

Appl Water Sci

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Centralized wastewater management system is the modern day waste management practice, but the high cost and stringent requirements for the construction and operation have made it less attractive in the under-resourced regions of the world. Considering these challenges, the use of decentralized wastewater management system, on-site treatment system, as an appropriate technology for domestic wastewater treatment is hereby advocated. Adopting this technology helps save money, protects home owners' investment, promotes better watershed management, offers an appropriate solution for low-density communities, provides suitable alternatives for varying site conditions and furnishes effective solutions for ecologically sensitive areas. In the light of this, an overview of the on-site treatment scheme, at the laboratory scale, pilot study stage, and field trials was conducted to highlight the operational principles' strength and shortcomings of the scheme. The operational requirements for the establishing and operation of the scheme and best management practice to enhance the performance and sustenance were proffered.

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“…The results showed that COD leached at the reactor surface and was gradually removed from the effluent on its passage through the vermicompost column. Gonzalez-Martinez et al (2007) and Kumar et al (2014) reported the highest removal of total BOD and dissolved COD values from municipal waste water using vermifilter. Vermicompost removed the high BOD of the industrial effluents and it came down to 174.0 mg/L from initial 387.5 mg/L for beverage industry, 260.0 mg/L from 440.0 mg/L for paper mill effluent and 5806.0 mg/ L from 17,200.0 mg/L for distillery effluent.…”

Section: Discussionmentioning

confidence: 97%