S.No |
Specification |
MDBR |
CSTR |
Advantages of MDBR
|
1 |
Digester Design |
First time in India HIT developed MDBR (Multi Domes Bio-Gas Reactor) technology. |
CSTR- (Continuous Stirred-Tank Reactor) |
MDBR is the most advanced technology used for waste degradation and enhancement of biogas production. Easy to maintain without scum and chocking problem. |
2 |
Technology |
It’s a unique design comprising of Multi Domes, Multi Chambers Multi Inlets & Outlets with expandable option Bio-Gas Reactor. |
Single chamber with single inlet, outlet. |
There is no scum and chocking problem due to the unique design of the Digester which consists of multi inlets and multi outlets |
3 |
Shape |
Square type |
Vertical cylindrical shape |
Due to the square type design and size compatibility the Digester is expandable to our convenience. |
4 |
Treatment Capacity |
100 Cum to any Capacity |
500 Cum to any Capacity |
Compatible. |
5 |
Dome/ Top mounted digester
cover |
Multi FRP Domes with upward and downward movements in
the water seal. |
Single non FRP Dome / Balloon. |
Installation of FRP Domes is much easier than Fixed Dome due to less weight. Zero maintenance up to 10 years when compared to non FRP domes |
6 |
Surface Area |
Specialized bricks used for the
construction of Baffled walls / Internal walls in the digester for the enhancement of surface
area and increasing the density of the microbial population.
|
Bio-film used to increase the surface area. |
“Surface area” is the key factor for increasing Bio-Gas Production. More than 50% of the surface area increased by constructing number of Baffle walls in the digester leading to the reduction in HRT and thereby reducing the volume of the digester. |
7 |
Mixing |
Bottom Mixing by using Pump |
Stirring constantly with recirculation of the slurry and gas by using equipment like Agitators for mixing. |
Zero power consumption and less maintenance due to the lack of movable equipment / machinery inside the digester. |
8 |
Pre-treatment Method |
Primary Digester Technology was introduced for Aerobic hydrolysis of Raw material. |
No Pre-treatment. |
Reduction in Digester volume up to 50 % and thereby reduces the cost of civil construction |
9 |
HRT (Hydraulic Retention Time) |
20 days |
35-40 days. |
HRT reduction due to the increase in the surface area because of increase in microbial density. |
10 |
SRT (Solid Retention Time) |
80 % |
52% |
Slurry outlet solids is only 2% due to which bio-gas production will be increased by 15 – 20 % |
11 |
Solids loading rate |
10-12% |
10% |
Compatible. |
12 |
Pressure relief valves |
Pressure relief valves are not required due to floating Domes. |
Pressure relief valves required due to fixed dome. |
Easy to handle &maintain |
13 |
Gas Storage |
Gas storage increases up to 10% due to floating dome. |
Less Gas storage due to fixed dome. |
The size of the Bio-gas storage balloon reduced |
14 |
Patent |
MDBR is a proprietary item of HIT-Patent Applied . |
Open technology |
HIT will provide the technology and the necessary
designs based on agreed terms and conditions |