SBT: For Lakes Bioremediation
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Transcript of SBT: For Lakes Bioremediation
CAMUS-SBT for Waste Water Recycling
Sharan K K Vision Earthcare (SINE, IIT Bombay)
M.Tech: IIT Bombay (Chem. Engg.)
www.visionearthcare.com
1
• Movie: India Innovates by GoI
• Water Scenario
• CAMUS-SBT Technology
• Quality Parameters for Water Reuse
• Installations of CAMUS-SBT?
• Q&A
2
Overview of Presentation
Govt of India: India Innovates
3
Water Scenario
4
Within a decade India will be highly stressed for water
Entire India and desert regions of West Asia & Africa will be on the same boat. By 2025,
India will have less than 1000 m3/capita year – water scarcity
Source : WBCSD report – Water Facts & Trends, 2005
CAMUS-SBT Applications
• Sewage Recycling
– Black from Toilets
– Grey from Washing Activities
• Industrial Waste Water Treatment
– Agro Industries:
– Distilleries
– Steel
– Pharmaceuticals
• Swimming Water Treatment
5
Conventional Technology
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Conventional sewage treatment plants have multiple mechanical equipment
that are critical to proper functioning. Failure of one component has cascading
effects on the process
CAMUS-SBT vs Conventional
7
TS in large municipal units. Smaller systems the RWT is suitably redesigned.
CAMUS-SBT for
Recycling Water
Conventional
System for Disposal
CAMUS-SBT
8 Chandrashekar S, Shankar HS: Bio-Remediation of Waste Water Streams using SBT: AICHE 2009
CAMUS-SBT is designed
with minimal mechanical
equipment
CSBT Process Chemistry
9
Technology Comparison
10
CAMUS-SBT vs Conventional
11
# Item/Parameter Unit ASP MBBR SBR MBR
CAMUS
-SBT
1 Overall HRT Hrs. 12 to 14 8 to 12 14 to 16 12 to 14 3 to4
2 BOD Removal % 85-95 85-95 90-95 95-98 95-98
3 COD Removal % 80-90 80-90 88-96 95-99 95-99
4 TSS Removal % 85-90 85-95 90-96 98-99 98-99
5 Fecal Coliform Removal log Unit upto3<4 upto2<4 upto2<4 upto6<7 upto7<8
CAMUS-SBT Features
CAMUS SBT Features
No external aeration
Low power consumption
No bio-sludge formation
Efficient removal of pollution
Garden like ambience
One time media installation
Long life
Unskilled personnel sufficient to operation
Designs for below roads, in traffic islands, boundary wall
Works even in Fluctuating power and waste water load.
12
Prefab Unit 3 KLD
13
Factory 10 KLD
14
Process Reuse 35 KLD
15
Airport 120 KLD
16
Housing Colony 650 KLD
17
Golf Course 1MLD
18
BMC 3MLD Plant
19
Typical Treated Results
20
BMC Worli Results
21
CAMUS SBT plant details
• Project: Herohalli Lake, BBMP
• Design Capacity -1.4 MLD
• Area Used - 1650 Sq.M.
• Project Cost - INR. 3 crores
• Power Consumption 125 Units /day.
22
BBMP 1.4 MLD
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BBMP Test Results
24
Questions?
25
OXYGEN TRANSFER
• Oxygen Transfer in soil media based on literature values of k= kL.a.*E*C* =
10**(-4)m /s 3600s/hr* 20 sqm/cum*6 g/cum= 43.2 g/cum.hr
– kL = 4e-3 m/hr (quiescent liquid) 1
– a = 120 sqm/cu.m (a=6/Dp) (Dp = 10mm particles)
– C* = 6.5g/cu.m
– Max calculated Oxygen mass transfer = 15.6 g/cu.m.hr
• Actual Oxygen transfer
– V = 2500 cum
– F = 100 cum/hr
– COD in = 344 mg/L
– COD out = 16 mg/L
– Oxygen consumed = 32 kg/hr
– Actual oxygen supplied = 13.0 g/cu.m .hr
26 1: Caron et al, (1998) J Geochem Expl, v64, p111
UNIQUE FEATURES • Near saturation DO ( 6 mg/L at 28 C)
– no greenhouse methane gas emission
• Significant reduction in Hardness achieved implying biological hardness
removal so great commercial value
– Ca2+ + CO2 + H2O = CaCO3 + 2H+
– Rock + 2H+ = soil + Na+/K+ goes into solution
• Soil production for various uses via chemical weathering;
– benefits to urban greening
• Reusable water with high DO
– Commercial fisheries
• No mechanical oxygen supply
– Low energy
– Reliability
• Evergreen ambience
• Energy of waste which otherwise cause sanitation problems harnessed for
value addition
27
New Initiatives
• Containment in Gabion structure
• New Low Pressure Distributor for near uniform
space use
• Catalyst for oxygen transfer Fe3+ oxide to Fe2+
oxide
• Fe3+ + organics = Fe3+.organic complex
• Fe3+.organic complex = Fe2+ + oxidized organics
(CO2)
• Fe2+ + Oxygen = Fe3+
• Media for higher holdup
28 Kinectics of Redox Reactions: Stumm and Morgan (1996) Aquatic Chemistry, John Wiley