Mass Reduction and Recovery of Nutrients Through Vermicomposting of Fly Ash

Venkatesh, Ramarao

doi:10.15666/aeer/0601_077084

Cited by 42 publications

(17 citation statements)

References 19 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is in accordance with the results of (Atiyeh et al 2000; Venkatesh and Eevera 2008; Raphael and Velmourougane 2011). pH decrease may be due to the nitrification process experienced by the composting process, accumulation and reduction of organic acids from microbial metabolism, production of fulvic and humic acids during decomposition or as a result of NH3 volatilization during composting process (Albanell et al 1988; Hanc and Vasak 2015; Cáceres et al 2006).…”

Section: Discussionsupporting

confidence: 93%

Enhancing rock phosphate integration rate for fast bio-transformation of cow-dung waste-paper mixtures to organic fertilizer

2016

View full text Add to dashboard Cite

Rock phosphate (RP) addition in cow-dung waste-paper mixtures at rates above 2% P has been reported to increase the rate of bio-transformation and humification of organic waste mixtures during vermicomposting to produce organic fertilizer for organic farming. However, the optimization of RP for vermicomposting was not established. The objective of this study was to determine the optimal amount of RP integration rates for effective bio-transformation of cow-dung waste-paper mixtures. Arrays of RP integration degrees (0, 0.5, 1, 1.5, 2, and 4% P as RP) were thoroughly mixed with cow- dung waste-paper mixtures to achieve an optimized C:N ratio of 30 and allowed to vermidegrade following the introduction of earthworms at a stocking mass of 12.5 g-worms kg−1. The bio-transformation of the waste mixtures was examined by measuring C:N ratios and humification index (HI) and per cent ash and volatile solids. Application of 1% P as RP resulted in fast bio-transformation and maturation of cow-dung waste-paper mixtures. A scanning electron microscopy (SEM) was used to evaluate the morphological properties of the different vermicomposts affected by rates of RP showing the degree of degradation of initial compacted aggregates of cellulose and protein fibres in the mixtures at maturity. A germination test was used to further determine phytotoxicity of the final composts and microbial biomass assessment. The final vermicompost (organic fertilizer) had a C:N ratio of 7, MBC of 900 mg kg−1 and HI of 27.1%. The RP incorporation rate of 1% P of RP investigated is therefore, recommended for efficient vermidegradation and humification of cow-dung waste-paper mixtures. However, higher rates of RP incorporation should be considered where greater P enrichment of the final vermicompost (organic fertilizer) is desired.

show abstract

Section: Discussionsupporting

confidence: 93%

Enhancing rock phosphate integration rate for fast bio-transformation of cow-dung waste-paper mixtures to organic fertilizer

2016

View full text Add to dashboard Cite

show abstract

“…Since the earthworms are isolated from the vermicomposted FA prior to the application in fields, use of this technology is likely to reduce the problem of heavy metal toxicity in FA to a considerable extent. Similar effects of using vermicomposting biotechnology on recycling of FA have been reported by other workers also [33,39].…”

Section: Figure 1 Changes In Occurrences Of Different Microorganismssupporting

confidence: 87%

Use of Vermicomposting Biotechnology for Recycling Fly Ash as a Source of Plant Nutrients

2017

View full text Add to dashboard Cite

Large scale generation of fly ash from increasing numbers of coal fired plants is now emerging as a global environmental threat. To combat the situation, emphasis is being given on recycling of this waste material for various productive purposes. Since fly ash contains many plant nutrients in appreciable amount, it's re-use as a source of these nutrients forms an important component of such efforts. However, the major problem associated with supply of plant nutrients through fly ash is the low availability of most of the nutrients in this material despite their good occurrence in total amount. This behavior is attributed to inert nature of this burnt material. Since vermicomposting helps in accelerated degradation of various kinds of wastes through earthworm gut microorganisms, we assessed the possibility of enhancing the availability of different plant nutrients in fly ash through this biotechnology. The results of a series of yard as well as on-farm studies showed that introduction of epigeic earthworms in mixtures of fly ash and organic wastes helped to stabilize the organic matter and enhance the microbiological activity in the substrates. These, in turn, helped to improve the availability of three major nutrients viz. N, P and K in the composted materials. It was further observed that substantial shares for such increments came from degradation of fly ash. Onfarm trials showed use of vermicomposted fly ash to be able to compensate the application rates of fossil fuel based chemical fertilizers to 40 -50 % without compromising the yield of the crops. Status of different soil health attributes were also found to be in acceptable ranges under these treatments. A protocol for vermicomposting of fly ash, developed through systematic studies on screening of suitable earthworm species, maintenance of optimum composting condition, use of varying kinds of organic wastes etc, has been discussed.

show abstract

“…Thus combined action of earthworms and microorganisms bring TOC loss from the substrates in the form of CO 2 [24]. Earthworms and microorganisms use large portion of carbon as a energy source and nitrogen for building cell structure which causes decomposition of organic matter [25].…”

Section: Nutrient Quality Of Vermicompostmentioning

confidence: 99%

Feasibility of nutrient recovery from industrial sludge by vermicomposting technology

Yadav

Garg

2009

Journal of Hazardous Materials

135

View full text Add to dashboard Cite

Mass Reduction and Recovery of Nutrients Through Vermicomposting of Fly Ash

Cited by 42 publications

References 19 publications

Enhancing rock phosphate integration rate for fast bio-transformation of cow-dung waste-paper mixtures to organic fertilizer

Enhancing rock phosphate integration rate for fast bio-transformation of cow-dung waste-paper mixtures to organic fertilizer

Use of Vermicomposting Biotechnology for Recycling Fly Ash as a Source of Plant Nutrients

Feasibility of nutrient recovery from industrial sludge by vermicomposting technology

Contact Info

Product

Resources

About