Decentralised Waste Water Systems - Auroville Green Practices
Decentralised Waste Water Systems - Auroville Green Practices
Decentralised Waste Water Systems - Auroville Green Practices
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Presented at<br />
Seminar and Site Visits<br />
26-28 August, 2010<br />
<strong>Decentralised</strong> <strong>Waste</strong><br />
<strong>Water</strong> <strong>Systems</strong><br />
Tency Baetens<br />
<strong>Auroville</strong> Center for Scientific Research<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 1 of 48
Drinking water . Dirty effluent . Clean waste water<br />
<strong>Water</strong> scarcity will create awareness of unsustainable water practices,<br />
thereby augmenting the need for water reduction measures<br />
and proper treating of waste water<br />
Treating waste water with minimal dependency on external energy<br />
and maintenance procedures<br />
To achieve discharge standards<br />
To be able to reuse wastewater and its contents<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 2 of 48<br />
Decentralized waste water treatment systems<br />
Suitable for treatment of wastewater flows from 1-1000 m³/d<br />
Tolerant to inflow fluctuations<br />
Uses as much as possible gravity instead of pumps, avoiding valves<br />
Aims towards reliable and long-lasting devices<br />
Anaerobic technology in warm climates, aerobic technology in<br />
colder climates<br />
The treatment is achieved by channeling the waste water through<br />
different devices, using natural anaerobic and aerobic processes<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 3 of 48
Settler<br />
Pre-treatment<br />
Settler<br />
First-treatment<br />
Baffled Tank<br />
Second-treatment<br />
Anaerobic Filter<br />
Third-treatment<br />
Planted Gravel<br />
Filter<br />
Post-treatment<br />
Polishing Ponds<br />
Separates the liquid from the solid<br />
Retention time is only 2 hours.<br />
Pollution reduction is around 30%<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 4 of 48<br />
Baffled Tank<br />
Pre-treatment<br />
Settler<br />
First-treatment<br />
Baffled Tank<br />
Second-treatment<br />
Anaerobic Filter<br />
Third-treatment<br />
Planted Filter<br />
Post-treatment<br />
Polishing Ponds<br />
Effluent moves from top to bottom through identical sized chambers<br />
Retention time is 24 hours.<br />
Pollution reduction is around 80%<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 5 of 48
Planted Gravel Filter<br />
Pre-treatment<br />
Settler<br />
First-treatment<br />
Baffled Tank<br />
Second-treatment<br />
Anaerobic Filter<br />
Third-treatment<br />
Planted Filter<br />
Post-treatment<br />
Polishing Ponds<br />
A structure filled with gravel material<br />
<strong>Water</strong> resistant plants provide oxygen to the passing effluent<br />
Retention time is 1 day.<br />
Pollution reduction is 90%<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 7 of 48
Treatment Efficiency<br />
GOKALDAS: BOD and COD reduction in different modules<br />
mg/l<br />
1200<br />
1086<br />
1000<br />
880<br />
800<br />
600<br />
400<br />
571<br />
457<br />
200<br />
0<br />
Raw<br />
Sewage<br />
Outlet<br />
Settler<br />
25<br />
Outlet<br />
Baffled<br />
Reactor<br />
70<br />
20<br />
Outlet<br />
Gravel<br />
Filter<br />
60 56<br />
18<br />
Outlet<br />
Pond<br />
BOD5<br />
COD<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 8 of 48<br />
Vortex System<br />
Pre-treatment<br />
Settler<br />
First-treatment<br />
Baffled Tank<br />
Second-treatment<br />
Anaerobic Filter<br />
Third-treatment<br />
Vortex System<br />
Post-treatment<br />
Polishing Ponds<br />
A vertically positioned tube with a funnel shaped bottom element<br />
Inside the tube a natural occurring self-purification effect from<br />
the effluent takes place during the continuous swirling<br />
movement.<br />
Pollution reduction is 95%<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 9 of 48
Treatment Efficiency<br />
Guaranteed BOD below 15 mg/l (targeted below 10 mg/l), COD below 50 mg/l<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 10 of 48<br />
Polishing Ponds<br />
Pre-treatment<br />
Settler<br />
First-treatment<br />
Baffled Tank<br />
Second-treatment<br />
Anaerobic Filter<br />
Third-treatment<br />
Planted Filter<br />
Post-treatment<br />
Polishing Pond<br />
Aquatic plants and fish transform waste water from a lifeless state<br />
into living water again<br />
Ponds with aquatic plants are an efficient way to combine<br />
treatment with landscaping for an aesthetic water reuse<br />
Ponds can also act as storage devices<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 11 of 48
Surya Nivas, 2002<br />
Domestic effluent, 2 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 12 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 13 of 48
Centre Field, 1995<br />
Kitchen effluent<br />
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<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 15 of 48
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 16 of 48<br />
Invocation,1998<br />
Domestic effluent<br />
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<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 18 of 48<br />
Solar Kitchen, 1998<br />
Domestic effluent, 40 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 19 of 48
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 20 of 48<br />
Maintenance requirement:<br />
Desludging every 2-3 years<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 21 of 48
Udyogam, 2004<br />
Food processing, 12 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 22 of 48<br />
Aurobhakti, 2008<br />
Domestic effluent, 10 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 23 of 48
Aravind Eye Hospital, Pondi, 2003<br />
Hospital effluent, 500 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 24 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 25 of 48
GIDC settlement, Bhuj,<br />
Domestic effluent<br />
400 households<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 26 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 27 of 48
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 28 of 48<br />
City <strong>Green</strong>belt Dewats, Bhuj<br />
Municipal effluent, 15 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 29 of 48
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 30 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 31 of 48
ITC Surya Nepal, 2007<br />
Industrial effluent, 120 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 32 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 33 of 48
Kadambadi settlement, 2008<br />
183 households<br />
43 prefab dewats modules<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 34 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 35 of 48
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 36 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 37 of 48
Innovative <strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong><br />
Treatment <strong>Systems</strong> with vortex<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 38 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 39 of 48
Mitra Youth Hostel, 2009<br />
Domestic effluent, 10 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 40 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 41 of 48
Citadyne, 2010<br />
Domestic effluent, 7 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 42 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 43 of 48
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 44 of 48<br />
CSR, Auroshilpam, 2007<br />
Domestic effluent<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 45 of 48
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 46 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 47 of 48
Solar Kitchen XLL Vortex<br />
Research for VBHC Bangalore<br />
Domestic effluent , 850 m³<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 48 of 48<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 49 of 48
“And justify the light on Nature’s face.”<br />
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<strong>Decentralised</strong> <strong>Waste</strong><br />
<strong>Water</strong> <strong>Systems</strong><br />
Tency Baetens<br />
Contact<br />
<strong>Auroville</strong> Centre for Scientific Resesearch<br />
tency@auroville.org.in<br />
<strong>Decentralised</strong> <strong>Waste</strong> <strong>Water</strong> Treatment | Tency Baetens Aug 2010 51 of 48
green.aurovilleportal.org
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