- 22 December, 2024
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- ONECSIR
| Designation: |
Director
|
| Email Id: | an_vaidya[at]neeri[dot]res[dot]in |
| Qualification: |
B.Tech(Chem Engg.), M.Tech.(Chem Engg), Ph.D |
| Specialization: |
Chemical Engineering
|
| Address: |
NEERI, Nagpur
|
| Biodata: |
-
|
| Sr. No. | Publication Name |
|---|---|
| 1 |
Separation of WPCBs by dissolution of brominated epoxy resins using DMSO and NMP: A comparative study (Chemical Engineering Journal)
|
| 2 |
Toxic effect of hexavalent chromium on composting of segregated organic wastes
|
| 3 |
Separation of WPCBs by dissolution of brominated epoxy resins using DMSO and NMP: A comparative study
Printed circuit boards (PCBs) in electrical and electronic equipment (EEE) abide of valuable and hazardous materials and due to its complex and discrete make up across manufacturers, processing of waste PCBs (WPCBs) is a massive challenge. And therefore either completely novel or improved processes are needed for recycling of WPCBs and recovery of valuable materials from it. Present comparative study, was performed for processing WPCBs using solvents N-methyl-2-pyrrolidone (NMP) and dimethyl sulfoxide (DMSO). Various parameters, which include WPCB sizes; solid to liquid (S/L) ratio; temperature and time, were investigated to understand the WPCBs processing by dissolving bromine epoxy resin using solvents. Results showed that the rate of removal and separation of the bromine epoxy resin (BER) increases with respect to increasing various parameters. Optimum condition of complete separation of WPCBs using NMP were S/L ratio of 1:5, WPCB size/area of 4 mm/16 mm2 and 100 °C for 90 minutes, whereas for DMSO the optimum dissolution of bisphenol A were obtained in S/L ratio of 1:2, size/area of 6 mm/36 mm2 at 90 °C for 90 min. Overall, NMP proves to be better solvent for bromine epoxy resin than DMSO in terms of bisphenol A dissolution and separation of various layers of WPCB. Used solvents can be vaporised–condensed under the decompression for regeneration. This novel process can be an eco-friendly and effective option for separation and recovery of various valuable materials such as metals, glass fibres, etc. from WPCBs. Further research and testing is needed for precise evaluation between two processes using NMP or DMSO solvents, in terms of the valuable material recovery from WPCB and process techno-economics. |
| 4 |
Complete recycle bioreactor for anaerobic digestion of organic substrates: Food waste
|
| 5 |
A roadmap for development of sustainable e-waste management system in India
The problem of E-waste has forced Environmental agencies of many countries to innovate, develop and adopt environmentally sound options and strategies for E-waste management, with a view to mitigate and control the ever growing threat of E-waste to the environment and human health. E-waste management is given the top priority in many developed countries, but in rapid developing countries like India, it is difficult to completely adopt or replicate the E-waste management system in developed countries due to many country specific issues viz. socio-economic conditions, lack of infrastructure, absence of appropriate legislations for E-waste, approach and commitments of the concerned, etc. This paper presents a review and assessment of the E-waste management system of developed as well as developing countries with a special emphasis on Switzerland, which is the first country in the world to have established and implemented a formal E-waste management system and has recycled 11 kg/capita of WEEE against the target of 4 kg/capita set by EU. And based on the discussions of various approaches, laws, legislations, practices of different countries, a road map for the development of sustainable and effective E-waste management system in India for ensuring environment, as well as, occupational safety and health, is proposed. |
| 6 |
Green Waste as a Resource for Value Added Product Generation
|
| 7 |
Why and how aerobic-mesophilic composting is effective? A comprehensive study on aerobic and anaerobic composting of green waste under mesophilic and thermophilic conditions
|
| 8 |
Toxic effect of hexavalent chromium on composting of segregated organic waste.
|
| 9 |
Influence of heating source on the efficacy of lignocellulosic pre-treatment - A cellulosic ethanol perspective
|
| 10 |
Evaluation of the effect of size reduction and thermal treatment on metal extraction from PCBs of mother board and digital video drive of desktop PC
The study aims at evaluating the effect of particle size and thermal treatment on printed circuit boards (PCBs) of Mother Board (MB) and DVD on metal extraction. Results show around 90-95% (w/w) and 35-40% (w/w) of total Al and Cu respectively, in CPU could be recovered by systematized disassembly. Remaining embedded Al and Cu require metallurgical or hydro-metallurgical processing. Cu extraction increases with size reduction. Thermal treatment of MB-PCB shows reduction in Cu extraction (23-38%) for all sizes in comparison without thermal treatment, while DVD-PCB showed surge in extraction after thermal treatment (41-141%) in comparison without thermal treatment. |
| 11 |
Additives aided composting of green waste: Effects on organic matter degradation, compost maturity, and quality of the finished compost
|
| 12 |
effects on enzymatic hydrolysis and ultrastructural changes
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| 13 |
Pretreatment of banana agricultural waste for bioethanol production: Individual and interactive effects of acid and alkali pretreatments with autoclaving, microwave heating and ultrasonication
|
| 14 |
Pretreatment of garden biomass using Fenton's reagent: influence of Fe2+ and H2O2 concentrations on lignocelluloses degradation
|
| 15 |
Recent advancements in the mitigation of obnoxious nitrogenous gases
Nitrogenous gaseous emissions commonly have an obnoxious odor associated with it, which when discharged into the environment results in serious environmental problems and health hazards. Several strategies for mitigation of nitrogenous odorants have been reported which include physical, chemical and biological methods. Biological treatments are widely employed because of their efficiency even at low concentration, where physical and chemical methods are not effective. Most commonly used biological treatment methods are biofiltration, biotrickling filters and membrane bioreactors with innovative reactor design, mixing pattern, and air sparging, for example FEBR, ALR, etc. These treatment methods require a critical assessment for the mitigation of obnoxious nitrogen emissions, especially in the context of environmental protection. This review offers a critical evaluation of treatment methods for the mitigation of nitrogenous odorous compound with a key emphasis on biological treatment systems. Also, various mathematical modelling techniques required for optimized operation of biotreatment systems has been discussed. |
| Sr. No. | Copyright Title |
|---|---|
| 1 |
AN IMPROVED PROCESS FOR BENEFICATION OF PICKING WASTEWAER WITH SIMULTANEOUS RECOVERY OF HYDROCHLORIC ACID ON FERROUS SULFATE
|
