Sewage Treatment
First:
For this many persons the only possible; way to treat this is wih a complete
self contained aerobic digestion system using a chlorination for the effluant
and hiring a vacuum truck to remove the sludge as needed from the settling basin.
Second you will need to drill a very deep well to get to clean potable water
as you may also have arsenic in the drinking water.
You will need to use steel well casing that is either welded together or threaded
casing with couplers and pipe dope to seal the joints.
The current drinking water available is no longer safe to use ■
Deep £$%^ Indeed
Sewerage treatment is definitely not a bulk material handling topic. You need to consult the local public health inspector who will probably shut the facility down and call for the necessary improvements. There are serious legal implications involved. ■
John Gateley johngateley@hotmail.com www.the-credible-bulk.com
Sewerage Treatment System
Dear Experts,
I have come across a septic tank design as follows, in a factory employing about 100 persons.
There are three cylindrical wells each of 7 mtrs depth and dia about 1.1mtrs.
The first two wells are constructed using precast rings fixed one over the other and plastered inside and floor with cement mortar.
The sewage from the latrine comes to the first tank.
When first tank is filled, the overflow goes to the second and finally to the third tank which has not been plastered inside.
The entire tank system is under a roof and not in open as specified.
This has resulted contamination of the potable water wells in the near vicinity (less the 10 to 15 mtrs away ). Coliform bacteria has gone up to 1100 against10 as specified
in the Standards. Water from these wells turns yellowish on storage.
FE content has also increased.
Normal depth of potable water wells in this area is 7mtrs to 8mtrs and in rainy season the ground water level is 1.5 to 2 mtrs from the ground surface.
I request valuable suggestion from experts,as,how to solve this.
Rgds,
Narayanan Nalinakshan. ■