|
Ä |
Desilting operation
of sewer proceeds from manhole to manhole. |
|
Ä |
Normally cleaning process starts downstream of sewer line. |
|
Ä |
Selected reach of sewer line is dewatered by submersible pumps and then plugged by means of sand bags / M.S plates etc and the flow is diverted. |
|
Ä |
In between reaches are then flushed by air compressor to remove the harmful gasses. |
|
Ä |
Multi gas detector is then used to check the concentration of hazardous gasses
like H2S,CO2 and CO. |
|
Ä |
Sewer
line is then cleaned by jetting and suction processes. |
|
Ä |
Thereafter if desired then C.C.T.V is done. |
|
Ä |
Followed
by removal of plugs & pumps. |
|
Ä |
Normally desilting operation proceeds between 10:00
pm at night to 06:00 am in the morning,
for the following
reasons:
u Flow of water in the sewer is almost zero
v Traffic Manouvaring on the roads is at its lowest. |