DRDO Biotoilet in India (Defence Research & Development Organization, India) - biodigester, ABR, constructed wetland

  • girishmbu
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Re: New Toilets In Indian Trains No Better Than Septic Tanks: IIT Study

Dear Elisabeth,

IIT team never ever took samples from biotoilets mounted on Indian railways. The study conducted on the samples taken from different locations in South India shows that the performance of biotoilet is good with average 80% BOD reduction.
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  • pkjha
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  • Working for over 30 years in the fields of sanitation, biogas from human wastes, septage management, waste water treatment in rural as well as urban areas in India and other developing countries.
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Re: New Toilets In Indian Trains No Better Than Septic Tanks: IIT Study

As per the report, it is true that ITT Chennai Team did not analyse samples from DRDO toilet fitted in trains. They took samples from 6 such toilets installed in IIT campus and other 16 such toilets in field. The team comprising well known experts evaluated the performance for two years. Toilets in IIT campus were in operation under control. Based on the observation it was concluded that the treatment of human wastes was not better than the septic tank. The report was submitted to the CPHEEO, Ministry of Urban Development, Government of India.
It needs to be checked the difference in design / operation of present set of toilets with that of earlier set of toilets studied by IIT.
Pawan

Pawan Jha
Chairman
Foundation for Environment and Sanitation
Mahavir Enclave
New Delhi 110045, India
Web: www.foundation4es.org
Linked: linkedin.com/in/drpkjha
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  • AjitSeshadri
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Re: New Toilets In Indian Trains No Better Than Septic Tanks: IIT Study

Dear Readers. It was correctly brought out by Prof Pawan Jha that proper representative samples were not used in testing samples to be taken from moving trains etc.. Repeat apt sampling and testing need to be done.pl. well wishes. Prof.Ajit Seshadri. Vels University.Chennai.INDIA .
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  • pkjha
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Re: New Toilets In Indian Trains No Better Than Septic Tanks: IIT Study

Dear Seshadri and All
It was also mentioned in my last post that proper samplings were carried out from 6 biotoilets installed in the campus of IIT Chennai and other 16 such toilets in the field. Monitoring was done by a team comprising senior officers from the concerned ministry and well known experts in the field led by IIT Chennai.
Regards
pawan

Pawan Jha
Chairman
Foundation for Environment and Sanitation
Mahavir Enclave
New Delhi 110045, India
Web: www.foundation4es.org
Linked: linkedin.com/in/drpkjha
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  • girishmbu
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Re: New Toilets In Indian Trains No Better Than Septic Tanks: IIT Study

Dear All,

I have gone through the PPT of Dr Ligy Philips available on Susana forum. The evaluation was done in by IIT Madras team in two phases:

In first phase, the effluent samples from DRDO biodigester installed at 15 different sites from south India by DRDO Licensee vendors namely Banka BioLoo Pvt Ltd., MAK India Ltd., Eram Scientific Solutions and Shubra Biotech Pvt Ltd were evaluated.
The size of Bio-Digester is not mentioned in the report, the numbers of users were in the range of 1 to 150
A few sites had reed bed or sand filters installed.
The results for COD, BOD, TSS and fecal coliform are mentioned as percentage which is not a correct way of presenting the data. They should have compared their findings with the DRDO norms. Analysing the study with data indicated in %age is not feasible.
They have concluded that none of the samples meet CPCB discharge limits but no data is presented for the same.
They concluded that there was no significant difference observed between performance of anaerobic Bio-Digester’s installed by the various DRDO licensee vendors in South India.
They also concluded that performance of DRDO Bio-Digester varied upon number of users, regular usage and treatment units installed after biodigester.

Although proper sampling done by IIT team in their in house study, the Bio-Digesters evaluated no where confirm to the DRDO Designs.
The Biodigester do not have any kind of internal piping systems y.Small patch of polygrass mat instead of covering the entire partitions with polygrass mat and no gasket to ensure anaerobic conditions. also no vent pipe for escape of biogas.


Regards

Girish
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