gerald lappus

hello,

The feeding material which have 7 % of oil content . What happens to the oil content in the substrate?. I heard the oil content completely converters to produce biogas .

Will the oil trace kills the bacteria?

Some suggestion is helpful for me .

Thanks .

The biogas plant which we are planning, the feeding material is rich in nitrogen content. we are going for biogas recirculation for mixing. Ammonia production will be high. Recirculation of biogas with high ammonia, I guess it will increase the toxic level which affects the micro-organism more. Give me some suggestion to overcome with the issue of ammonia and what's the best technology for ammonia striping. Some suggestion will be helpful for me.

Thanks.

Thanks for the explanation, it is very useful for me.

Srinivas Kasulla wrote:Hi Gerald,
Operating Principle of BIMA digester.

BIMA digester is divided into 3 separate sections, being connected liquid and gas wise. The three sections are the main chamber, the upper chamber and the central tube, to which the feed-pipe is connected. In this central tube prehydrolysis of the substrate takes place. Most of the biogas is generated in the main chamber through the decomposition of organic materials. By closing an automatic valve in the gas pipe between the two chambers the gas produced in the main chamber is collected there, which in turn displaces an equal amount of the digested substrate into the upper chamber, building a level of difference and thus a gas pressure in the main chamber. When the required level difference is achieved (mixing pressure), the gas pressure is released by opening the automatic valve in the gas connecting pipe. Thus the substrate displaced into the upper chamber flows back to the main chamber with high velocity. A portion of the waste flows to the main chamber through the mixing wings while the rest flows back through the mixing shafts. On account of this, fresh substrate, scum and sediments are perfectly remixed with the contents of the main chamber. Thus the new pre-hydrolyzed substrate is mixed with active biomass in the digester. Another portion of the digested substrate, which flows out through the mixing shafts, pours onto the surface of the main chamber, thus avoiding formation of scum.

Regards
Srinivas Kasulla
srinivaskasulla@gmail.com
srinivaskasulla@xeonwm.com

Hello Friends,

At the moment I am working in CSTR digestion process, I will be started working in BIMA (Biogas Induced Mixing Arrangement) in the coming days. Can anyone explain me the working principle of BIMA digester process and share any references if you have, will be very helpful for me.

Thanks.

Hello friends,

I am working on a theoretical report of designing a 700 cubic meter capacity of biogas plant with sweet sorghum as a substrate in mesophilic temperature.

I am having some questions
,
1. Sweet sorghum as a feeding material, i am bit confused in determining the organic loading rate per day. With the capacity of the fermenter and the hydraulic retention time, we can calculate the feeding rate.

Sweet sorghum harvested and utilize for biogas production directly, not used for sugar and ethanol extraction, will be it efficient?

Any suggestion regarding, what would be the hydraulic retention time of the plant with sweet sorghum as a feeding material?

What has to be the size of the sweet sorghum to be cut for optimum degradability?

What would be the specific gas production?

2. Is it possible to produce efficient biogas using only sweet sorghum as a feeding material and just use the manure for initial start up?

3. What would be the efficient ratio of mixing sweet sorghum with the water?

4. In order to have a better degradability and optimum pH, for example added lime or NaoH would improve the condition of the degradation.
Can the lime or NaoH added directly to the fermenter? or how it has to be done?


Any suggestions would be appreciated.

Thanks.