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Das, Ashutosh
- Study on Treatment of Electroplating Wastewater Using Constructed Wetland
Abstract Views :164 |
PDF Views:0
Authors
Affiliations
1 Department of Civil Engineering, SRM University, Kattankulathur-603 203, T. N., IN
2 Centre for Environmental Engineering, PRIST University, Thanjavur-613 403, T. N., IN
1 Department of Civil Engineering, SRM University, Kattankulathur-603 203, T. N., IN
2 Centre for Environmental Engineering, PRIST University, Thanjavur-613 403, T. N., IN
Source
Nature Environment and Pollution Technology, Vol 14, No 1 (2015), Pagination: 95-100Abstract
Electroplating waste with very high concentration of metals and COD has always been posing a great challenge for treatment in an environmental-friendly way. The present study attempts at use of constructed wetland in treating electroplating waste. Three types of wetland setups were used in the study, namely: single wetland cell, two-wetland cells in cascade and single wetland cell with adsorbent bed for varying hydraulic detention times (2 days, 4 days and 6 days) in batch mode. The percentage removal of all metals was found to be more than 80%. The effect of varying detention time was not found to improve the removal efficiency in all the three cells varying modes of treatment, thus indicating 2 days to be optimum detention time. The mode of set-up of the wetland cells (i.e., with cascading and with augmented adsorbents) was not found to be statistically significant compared to treatment using single-isolated wetland cell unit, based on ANOVA test for two-factors, i.e., chemical speciation and wetland cell-setup types.Keywords
Constructed Wetland, Electroplating Wastewater, Heavy Metals, Hydraulic Detention Time.Full Text
- Evaluation of Effect of Calcium on Scale Formation and Corrosivity of Groundwater Using GIS
Abstract Views :148 |
PDF Views:1
Authors
Affiliations
1 Centre for Environmental Engineering, PRIST University, Thanjavur, T. N., IN
2 Department of Applied Geology, School of Engineering and Science, Curtin University, CDT 250, 98009, Miri, Sarawak, MY
1 Centre for Environmental Engineering, PRIST University, Thanjavur, T. N., IN
2 Department of Applied Geology, School of Engineering and Science, Curtin University, CDT 250, 98009, Miri, Sarawak, MY
Source
Nature Environment and Pollution Technology, Vol 13, No 1 (2014), Pagination: 101-106Abstract
The ancient Thanjavur population located in delta of River Cauvery had been dependent on surface water for drinking until recently, wherein there is an incremental rise in augmented bore-well water supply. Incidentally, there have been observations of moderate to high scale formations by the groundwater during domestic heating, as well as consistently high record of kidney-stone (mostly calcium oxalates) occurrence in the city and its suburbs. The present work focuses on calcium content, its desirability level and the corrosion/scaling coefficients. One hundred two (102) samples were collected prior to monsoon season in the year 2008 from the study area for study of various physico-chemical parameters. In order to estimate scalability and corrosivity, two standard indices (namely Langelier Saturation Index and Ryznar Saturation Index) were used. GIS has been used to develop integrated maps for demarcating zones of different calcium concentrations in groundwater and its relation with scale and corrosion formation tendencies.Keywords
Groundwater Quality, Scale Formation, Corrosion, Langelier Saturation Index, Ryznar Saturation Index.Full Text
- Recovery of Nutrients from Wastewater by Struvite Crystallization
Abstract Views :150 |
PDF Views:1
Authors
Affiliations
1 Department of Civil Engineering, SRM University, Kattankulathur, Kanchipuram, T. N., IN
2 Centre for Sustainable Development, PRIST University, Thanjavur, T. N., IN
3 School of Civil Engineering, SASTRA University, Thanjavur-613 401, T. N., IN
1 Department of Civil Engineering, SRM University, Kattankulathur, Kanchipuram, T. N., IN
2 Centre for Sustainable Development, PRIST University, Thanjavur, T. N., IN
3 School of Civil Engineering, SASTRA University, Thanjavur-613 401, T. N., IN
Source
Nature Environment and Pollution Technology, Vol 12, No 3 (2013), Pagination: 479-482Abstract
Discharge of untreated domestic wastewater often leads to eutrophication of receiving water body and create a septic condition, and accelerate sewage sickness in case of land-disposal. However, since domestic wastewater is recognized as nutrient rich water, the recovery of nutrients using a chemical precipitation and crystallization technique may provide value added product struvite, which is a slow releasing fertilizer. This research work shows the techno-feasibility struvite precipitation as an attempt for improving water quality, with simultaneous recovery of struvite as byproduct.Keywords
Domestic Wastewater, Recovery of Nutrients, Struvite.Full Text
- Comprehensive Study on Textile Dyeing Sludge as a Substitute for Cement in Cement-Mortar
Abstract Views :186 |
PDF Views:0
Authors
Affiliations
1 Department of Civil Engineering, M.A.M. College of Engineering, Trichy, Tamil Nadu, IN
2 Department of Civil Engineering, VNR VJIET, Bachupally, Hyderabad, Telangana, IN
3 Centre for Environmental Engineering, PRIST University, Vallam, Thanjavur, Tamil Nadu, IN
1 Department of Civil Engineering, M.A.M. College of Engineering, Trichy, Tamil Nadu, IN
2 Department of Civil Engineering, VNR VJIET, Bachupally, Hyderabad, Telangana, IN
3 Centre for Environmental Engineering, PRIST University, Vallam, Thanjavur, Tamil Nadu, IN
Source
International Journal of Technology, Vol 5, No 2 (2015), Pagination: 219-224Abstract
This study examines the reuse of textile effluent treatment plant (ETP) sludge in substituting cement in construction industry. The chemical sludge from CETP of Karur, Tamil Nadu has been taken for study purpose. This is a comprehensive study mainly testing the physical properties such as consistency, initial and final setting time of cement with various percentages of sludge, and compressive strength of the mortar cubes with sludge replacing the cement; testing the chemical properties such as pH, Electrical conductivity, Total Hardness and Heavy metal concentration present in the cured water for various days for various percentages of sludge replacing cement in cement-mortar cubes. The chemical sludge from textile wastewater treatment plants has a potential to be reused up to 20% replacement of cement to ensure the required compressive strength of mortar.
Keywords
Hazardous Waste, Textile Industry, Chemical Sludge, Characterization, Waste Management, Cement, Physico-Chemical Properties, CETP, Karur.
- Remediation Strategies for Phenolic Compounds Toxicity
Abstract Views :181 |
PDF Views:0
Authors
V. Srihari
1,
Ashutosh Das
2
Affiliations
1 National Institute of Construction Management and Research, Construction Industry Staff College (NICMARCISC), Kondapur, Hyderabad-500084, Telangana, IN
2 PRIST University, Vallam, Thanjavur-613402, Tamil Nadu, IN
1 National Institute of Construction Management and Research, Construction Industry Staff College (NICMARCISC), Kondapur, Hyderabad-500084, Telangana, IN
2 PRIST University, Vallam, Thanjavur-613402, Tamil Nadu, IN
Source
Asian Journal of Pharmacy and Technology, Vol 4, No 4 (2014), Pagination: 179-183Abstract
Phenol, although used as an essential ingredient for pharmaceutical and cosmetic applications, yet can lead to severe toxicity on improper handling. Several industrial wastewater (especially, from coke-oven plants, pharmaceuticals, textile and chemical industries) pose serious threat to living organisms. The present paper provides an outline of the physico-chemical characteristics, usages and hazards and remediation measures for control of phenol toxicity. The various analytic methods of attempts for dephenolation of wastewater include steam stripping, solvent extraction, oxidation (O3, H2O2, and ClO2), ion exchange, biodegradation and adsorption methods were discussed.Keywords
Phenol, Hazardous Compounds, Toxicity, Adsorption, Dephenolation.- Performance of Combined Adsorption and Biological Process in Decolorization and Demineralization of Dye Wastewater
Abstract Views :202 |
PDF Views:0
Authors
Affiliations
1 Centre for Environmental Engineering, PRIST University, Thanjavur-613403, Tamil Nadu, IN
1 Centre for Environmental Engineering, PRIST University, Thanjavur-613403, Tamil Nadu, IN
Source
Nature Environment and Pollution Technology, Vol 17, No 1 (2018), Pagination: 117-121Abstract
This work studies the performance of combined adsorption and biological processes for degradation of crystal violet (CV) in wastewaters. The results were compared with biodegradation experiments conducted without adsorption. Activated rice husk was used as an adsorbent whereas, mixed culture was used for biological experiments. Effect of glucose concentrations and initial concentrations of dye were studied in detail. It was observed that combined degradation was very effective in removing CV from wastewaters. Adsorption with rice husk significantly increased the mineralization capacity of pollutants. Mineralization of actual textile effluents from textile industry also revealed the superior nature of combined treatment in comparison to biodegradation of dyes in wastewater.Keywords
Crystal Violet (CV), Adsorption, Biodegradation, Decolourization, Mineralization.Full Text
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