SUB : REGARDING GREY WATER PROCESSING OF THE DRAINAGE WATER AND RE-USER THEREOF IN PUNE CITY.
The used water output from drainage to water purification plant of Pune Municipal Corporation are of two types. Water from Bathroom and Kitchen is called Grey Water, and the water from toilet blocks is called black water. The percentage of grey water is nearly 75% and black water is only 25% out of the total water output. At present in Sewage Treatment Plants (S.T.P.) the entire water is collected processed and thereafter it is poured in the river.
If seprate lines are installed in the colonies / buildings for collecting the Gray Water and then connected to the Strom line water already in existence then these stromwater lines are led into Nala’s / channels of the city. By laying a seprate stromwater line in the Nala these gray water with primary processing can be directly connected to the Canal which passes through the City and these Gray Water can be used for farming. Presently 8 T.M.C. of water is allotted for farming can be saved. If required technically then certain filtration beds can be laid in the Canals for further purification of water, which is also very cost efficient and maintenance free natural way of water purification.
For this purpose the Building / Colony’s would required to lay Separate lines for colleting Gray Water such capital expenditure can be met through by providing them certain TDR / DRC. In case of certain new colony’s where already S.T.P is installed they can used the Gray Water after primary processing for their Gardens and the balance Gray water can be disposed as stated above.
Only 25% black water (Drainage water) should be fully processed whereby the pressure on S.T.P. plant shall be considerably reduced resulting in saving the expenditure for running the S.T.P. plant. For the aforesaid work Pune Municipal Corporation should appoint an expert consultant. The aforesaid work should be included in Second Phase of J.N.N.R.U.M. of Central Government.
Highlighted Points :