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

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• 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

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Water Scenario

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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

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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

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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

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Technology Comparison

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CAMUS-SBT vs Conventional

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# 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.

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Prefab Unit 3 KLD

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Factory 10 KLD

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Process Reuse 35 KLD

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Airport 120 KLD

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Housing Colony 650 KLD

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Golf Course 1MLD

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BMC 3MLD Plant

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Typical Treated Results

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BMC Worli Results

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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.

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BBMP 1.4 MLD

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BBMP Test Results

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Questions?

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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

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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