Time filter

Source Type

Dehradun, India

Doon University is located in the city of Dehradun in the Indian state of Uttarakhand. The university was established by an Act of the Uttarakhand Legislative Assembly in October 2005. The first academic session was started on 9 May 2009. The university follows a semester system with two semesters every year. Wikipedia.

Suthar S.,Doon University
Ecological Engineering | Year: 2012

This work illustrates the vermistabilization of milk processing industry wastewater sludge (MPIS) spiked with cow dung (CD) using earthworm Eisenia fetida. A total of four experimental vermibeds were established and changes in chemical parameters of waste material have been observed for 90 days. Vermistabilization caused significant reduction in pH, organic carbon and C:N ratio and substantial increase in total N, available P, exchangeable cations (K + and Ca 2+) and extractable trace elements (Fe, Mn and Zn). The waste mixture containing MPIS (60%)+CD (40%) showed the better mineralization rate as compared to others. The growth and cocoon production in E. fetida was also monitored in all experimental vermibeds. Also, E. fetida showed better growth and reproduction pattern in vermibeds with 40-60% MPIS. At high concentration MPIS caused significant mortality in worms. Results, thus suggested the suitability of vermicomposting for stabilization of noxious milk processing industry sludge. © 2012 Elsevier B.V.

Suthar S.,Doon University
International Journal of Environmental Science and Technology | Year: 2014

This work illustrates the toxicological impact of pesticide methyl parathion (MP) (dust-2 % active ingredient, a.i.) on growth and reproduction performance in tropical earthworms: Metaphire posthuma (endogeic), Lampito mauritii (anecic) and Allolobophora parva (epigeic). A total of three concentrations (a.i. g kg-1 dry test soil), 1.00 (T 1), 1.125 (T 2) and 2.25 (T 3) of MP, were applied in test substrate to examine the impact on mortality, individual live weight changes and reproduction patterns in test species over 60 days under laboratory conditions. MP caused significant mortality in all tested species, and median lethal dose (LD50) for L. mauritii, M. posthuma and A. parva was 24.85, 23.64 and 22.67 mg a.i., respectively. The individual live weight loss was 27.0-37.0 % in L. mauritii, 36.0-57.1 % in M. posthuma and 1.2-11.0 % in A. parva in different test concentrations. The pesticide-exposed worms produced less cocoons than control, but in L. mauritii, an unusual reproduction (hormesis) was recorded. Results suggested the species-specific toxicity of MP against tropical earthworms. © 2013 Islamic Azad University (IAU).

Garg V.K.,Guru Jambheshwar University of Science and Technology | Suthar S.,Doon University | Yadav A.,Guru Jambheshwar University of Science and Technology
Bioresource Technology | Year: 2012

This paper reports the vermicomposting of food industry sludges (FIS) mixed with different organic wastes employing Eisenia fetida. A total of 10 vermicomposting units containing different wastes combinations were established. After 15 weeks significant increase in total nitrogen (Ntotal) (60-214%), total available phosphorous (Pavail) (35.8-69.6%), total sodium (Natotal) (39-95%), and total potassium (Ktotal) (43.7-74.1%), while decrease in pH (8.45-19.7%), total organic carbon (OCtotal) (28.4-36.1%) and C:N ratio (61.2-77.8%) was recorded. The results indicated that FIS may be converted into good quality manure by vermicomposting if spiked with other organic wastes in appropriate quantities. © 2011 Elsevier Ltd.

Suthar S.,Doon University
Reviews in Environmental Science and Biotechnology | Year: 2011

This work illustrates the overview of vermitechnology as sustainable socio-economic venture for rural livelihood in some parts of State Rajasthan, India. The northern part of the State Rajasthan is rich in livestock population and animal husbandry is an integral part of rural livelihood. Traditionally, the livestock excreta which are produced in huge quantity either utilized as rural energy resources or manure in agriculture plots. In recent years, people of this region are utilizing livestock excreta as resources for vermicomposting to convert negligible wastes into some value-added products, i. e. vermicompost and earthworm biomass. The end-product not only valuable in terms of eco-sustainability but also appeared as economic venture for rural farmer communities. The overall scenario of vermitechnology in rural Rajasthan, India is presented by analyzing information collected through systematic studies (field observations, data collection form individual farmers, personal interviews etc.) © 2011 Springer Science+Business Media B.V.

Suthar S.,Doon University | Sharma P.,Doon University
Ecotoxicology and Environmental Safety | Year: 2013

This work illustrates the results of vermicomposting trials of noxious weed - Lantana camara (LL) leaf litter spiked with cow dung (CD) in different ratios (0%, 20%, 40%, 60% and 80%) using Eisenia fetida. A total of five treatments were established and changes in chemical and microbial properties of vermibeds have been observed for 60 days. In all treatments, a decrease in pH (19.5-30.7%), total organic carbon (TOC) (12-23%) and C:N ratio (25-35%), but increase in ash content (16-40%), total N(Ntot) (11-32%), available phosphorous (Pavail) (445-629%), exchangeable potassium (Kexch) (63-156%) exchangeable calcium (Caexch) (67-94%),and N-NO3 - (164-499%) was recorded. Vermibeds with 40-60% LL (T2 and T3) showed better mineralization rate. The number of fungi, bacteria and actinomycetes showed 0.33-1.67-fold, 0.72-2.33-fold and 2.03-2.99-fold increase, respectively after vermicomposting process. The germination index (GI) was between 47% and 83% in all vermicomposts as indicated by seed bioassay test. Results thus suggested that Lantana may be a potential source for vermicompost production for sustainable agriculture. © 2013 Elsevier Inc.

Discover hidden collaborations