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Philip, Ligy
- Greywater Treatment Using Horizontal, Vertical and Hybrid Flow Constructed Wetlands
Abstract Views :282 |
PDF Views:85
Authors
C. Ramprasad
1,
Ligy Philip
1
Affiliations
1 Department of Civil Engineering, Environment and Water Resource Engineering Division, Indian Institute of Technology Madras, Chennai 600 036, IN
1 Department of Civil Engineering, Environment and Water Resource Engineering Division, Indian Institute of Technology Madras, Chennai 600 036, IN
Source
Current Science, Vol 114, No 01 (2018), Pagination: 155-165Abstract
The performance evaluation of three pilot scale subsurface flow constructed wetlands (CW), i.e. horizontal flow (HFCW), vertical flow (VFCW) and a baffle type-hybrid (HYCW) was studied. The units were continuously fed with greywater and were planted with Phragmites australis. The inflow concentrations of BOD, COD, TSS, NO3, TP and FC were in the range of 72–120 mg/l, 216–320 mg/l, 224–320 mg/l 10.3–14.6 mg/l, 2.9–3.8 mg/l and 50–120 CFU/100 ml respectively. The average removal efficiencies of BOD, COD, TSS, TP, TN and FC in HYCW were 95 ± 2%, 96 ± 3%, 98 ± 2%, 92 ± 2%, 98 ± 2% and 98 ± 2% respectively and comparatively more than the other two constructed wetlands.Keywords
Constructed Wetlands, Hybrid Flow, Horizontal Flow, Organics and Nutrients, Phragmites australis, Vertical Flow.Full Text
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- Performance Evaluation of Anaerobic Baffled Biodigester for Treatment of Black Water
Abstract Views :153 |
PDF Views:73
Authors
Affiliations
1 Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600 036, IN
1 Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600 036, IN
Source
Current Science, Vol 118, No 8 (2020), Pagination: 1265-1274Abstract
In this study, the performance of anaerobic baffled biodigester installed in different regions of South India was evaluated for black water treatment. The evaluation was based on the vendors, establishment, impact of different sampling method s (grab and composite sampling) and the application of post-treatment unit. The treatment efficiency of the digester was assessed in terms of removal of organics (biological oxygen demand (BOD), chemical oxygen demand (COD) ), total suspended solids (TSS) and pathogens (faecal coliform). The maximum removal rate of COD, BOD and TSS was found to be in the range of 70–75%, 68– 80% and 55–75% respectively. Variations were observed between the grab and composite samplings with respect to the removal efficiency of organics, solids and pathogens. There was no significant difference in the performances of anaerobic biodigesters installed by different vendors in South India. The application of post- treatment unit such as gravel bed/reed bed after biodigester facilitated the removal of residual organic pollutants and provided better quality outlet water. The results indicated that the perfo rmance of anaerobic baffled biodigesters varies based on the number of users, location, usage pattern and the post-treatment unit installed.Keywords
Anaerobic Digestion, Biodigester, Black Water, Community Toilet, Onsite Treatment, Sanitation.Full Text
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Abstract Views :145 |
PDF Views:82
Authors
Ashutosh Sharma
1,
Rajiv K. Tayal
1,
Akhilesh Gupta
1,
Neelima Alam
1,
G. V. Raghunath Reddy
1,
Vineet Saini
1,
J. B. V. Reddy
1,
Ranjith Krishna Pai
1,
Ligy Philip
2,
Prasada Raju
3,
T. Pradeep
4
Affiliations
1 Department of Science and Technology, New Delhi 110 016, IN
2 Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600 036, IN
3 Industrial Consultancy and Sponsored Research, Indian Institute of Technology Madras, Chennai 600 036, India (former Scientist, DST), IN
4 Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, IN
1 Department of Science and Technology, New Delhi 110 016, IN
2 Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600 036, IN
3 Industrial Consultancy and Sponsored Research, Indian Institute of Technology Madras, Chennai 600 036, India (former Scientist, DST), IN
4 Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, IN
Source
Current Science, Vol 120, No 11 (2021), Pagination: 1790-1791Abstract
No Abstract.Keywords
No Keywords.Full Text