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3.6 Problems Faced by the Users
Out of the total studied plants, about 60 percent have been found facing problems. The detail of the
most common problems encountered by the users has been presented in Table 3-5.
Table 3-5
Most Common Problems Encountered by the Users and the
Source for Solving Them
S. No. District Company Problems Encountered No. of Users Source of Solution
1 Jhapa MGG a) Blockage of gas 2 company & owner
b) Insufficient gas 1 company & owner
2 Jhapa GRI a) Insufficient gas 1 company
b) Leakage of gas 1 company
c) Blockage of gas 1 company
3 Morang PGG a) Slurry in pipe line 1 company
4 Morang BIS a) Blockage of gas 2 company
b) Insufficient j^as 3 company
c) Slurry in pipe line 1 company
5 Sunsari GGC a) Blockage of eas 2 company
b) Insufficient gas 2 company
c) Slurry in pipe line 2 company
d) Pipe line and
company
accessories
6 Makwanpur NRG a) Blockage of gas 2 company & owner
7 Makwanpur RAP b) Insufficient gas 2 company & owner
8 Nuwakot KGY a) Blockage of gas 1 com pany
b) Pipe line and
2 company
accessories
9 Nuwakot JGY n) Pipe line and
1 company
accessories
10 Kathmandu NBG a) Blockage of gas 2 company
b) Insufficient gas 2 company
The most common problems existing in O & M of biogas plants are as follows:
- Blockage of gas
- insufficient gas
- Leakage of gas
- Slurry in pipelines
- Problems related to pipeline fittings and accessories
Out of these problems, blockage of gas and insufficient gas have been observed in 80 percent of the
problematic plants, whereas the rest of the problems were also noticed in majority of the plants.
None of the respondents expressed to have encountered the problems of structural breakdown of
digester such as fire hazards, though these sort of problems have to be given considerable att ention in
the future. The respondents also noted problems associated with accessories and equipments. Frequent
wearing out of the accessories like burner, lamps, main gas valve, pipe fittings and other parts is a
matter of concern in the improvement of qua lity of biogas system. It is but natural that such problems