<div>Dear Mr. Krishna,</div>
<div>thanks a lot for throwing light on the mystery of the Wardha biogas plant. To be fair to Dr. Soham Pandya, I must say that he mentioned that it was Chinese technology which he had modified to some extent. </div>
<div>Yours</div>
<div>A.D.Karve<br><br></div>
<div class="gmail_quote">On Wed, Oct 27, 2010 at 12:48 PM, Murali Krishna <span dir="ltr"><<a href="mailto:bmkrishna6@gmail.com">bmkrishna6@gmail.com</a>></span> wrote:<br>
<blockquote style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote"><font size="4">Dear Dr.Karve,<br><br>I had been to Wardah and visited the said digester at CSV, two years back. This digester was actually designed by Mr.Jianan Wang, a professor of Physics from China. This digester is known as Puxin Biogas model. It works on water Hydraulic Pressure. It is a mix of Deenabandu and Floating Drum. The size and weight of iron drum is bigger and heavier in floating drum model than Puxin digester.<br>
It is usually fed once in six months. The feeding rate is normal. It does not yield more gas than any other Indian digesters. The digester's is designed for 40/50 days HRT and is fed once in six months. Farmers of China fed this digester with waste grass clippings and dung/pig manure, etc. They are emptied once in six months and spread on their agricultural fields. Since there are dry grass clippings and sufficient enough nitrogen material is available (C:N ratio is maintained) and the quantity of feed stock is loaded for six months, the digester is giving 3 cubic meter gas every day without further feed.<br>
<br>You w ere not properly appraised by the people at Wardah for they themselves are not sure of the feed rate and no study is being conducted. You must have observed theat at CSV they have a canteen on the premises and everyday kitchen waste is fed into the digester. This they never consider nor bring into the notice of anyoneav. Similarly the same digesters which they have built at the restidential colony is connected to night soil regular feed source. <br>
The digester is 10 cube meter and it is giving only 3 cube meter gas. As per the inventor in China's weather it will give 5 to 6 cube meter gas. I had been exchanging correspondence with Mr.Jianan for more than two months during 2008-09 for designing 100 cube meter digester and go for 1 MW unit. As the cost is quite exhorbitant and my customers does not want this model. The advantage with this model is .....it is easy to empty and fill the digester. This digester can be used for continuous feeding also. I have built this digester at Hyderabad and the mould was lent by CSV. <br>
<br>This is a patented model for water hydraulic pressure and unfortunately the inventor's efforts are never acknowledged and many claim that it is their own invention.<br><br>Regards,<br><br>Murali Krishna.<br><br><br>
</font>
<div class="gmail_quote"><font size="4">On Sun, Oct 24, 2010 at 12:13 AM, Anand Karve <span dir="ltr"><<a href="mailto:adkarve@gmail.com" target="_blank">adkarve@gmail.com</a>></span> wrote:<br></font>
<blockquote style="BORDER-LEFT: rgb(204,204,204) 1px solid; MARGIN: 0pt 0pt 0pt 0.8ex; PADDING-LEFT: 1ex" class="gmail_quote">
<div><font size="4">Dear Dr. Martin, <br></font></div>
<div><font size="4">I have just returned from a city called Wardha, where I attended a workshop arranged jointly by the Research Councils of UK and the Department of Science and Technology, Government of India. About 20 scientists each from UK and India were invited to this meeting.</font></div>
<div><font size="4">In the course of field visits organised during the workshop, Dr. Soham Pandya, The Director of Centre of Science for Villages, an NGO in Wardha, showed us an amazing biogas plant on his campus. This biogas plant accepts about 1000 kg cattle dung as a one-time load and produces daily about 3 cubic meters of biogas, continuously over a period of about 180 days. This is not the only biogas plant constructed by him. Using funds from the Department of Science and Technology, He has constructed a similar biogas plant in another place called Hingoli, where a one-time load of 1000 kg dung yields biogas continuously for 6 months, to run an electricity generator for daily 3 to 4 hours, to provide electric lighting to all the houses in the village. Officials of the Department of Science and Technology vouched for the veracity of these claims. According to text book knowledge, 1000 kg dung should have produced about 30,000 litres (or 30 cubic meters) biogas. But this particular biogas plant produces 540 cubic meters of it.</font></div>
<div><font size="4">Neither Dr. Pandya nor any other scientist could give a scientific explanation to this phenomenally high yield of biogas. Dung of Indian cattle consists mainly of lignin (from the veins and midribs of the grass and leaves that they feed on) and micro-organisms. One has to assume in this case, that there are microbes in the dung that feed on the lignin and that the methanogens digested the lignin eating microbes.</font></div>
<div><font size="4">Yours</font></div>
<div><font size="4">A.D.Karve<br><br></font></div></blockquote></div></blockquote></div>