By using abundantly available local materials like bamboo and arecanut
(supari) husk, farmers of Onikeri village, Dakshin Kannada, Karnataka, has developed a
simple, low cost method to replenish the water tables. A one metre long bamboo stem is cut
longitudinally and all septas are removed. Both the halves when kept together look like a
pipe, which is inserted in the infiltration pit of two feet by two feet measurement. The
cavity of the pit is filled with one layer of areca husk topped with a layer of soil. Only
the husk needs to be refilled every year. Significantly, these structures have been
installed in 34 houses with community participation, covering an area of 100 acres. Sound
ecological engineering, indeed! (Information by Shree Padre, a journalist)
"By combining rainwater harvesting (RWH) with the application of soluble
calcium, the level of flouride in soil and water can be controlled," says S K Mishra,
Public Health and Engineering Department, Jaipur. (For details: firstname.lastname@example.org) RWH
reduces the flouride concentration by 40 per cent, but within six months it regains the
The method is still being tested in Jaipur. Initial results are positive but
final results are yet to come.
Techno tit bits
Sewage to light up your house!
A process has been evolved that transforms wet waste from sewage farms and paper mills
into a source of power - for homes, factories and cars.
Headed by Ashok Bhattacharya, the process technology group at University of
Warwick, UK, extracts pure hydrogen from abundantly available wet bio-matter, using the
water contents of the material. (For details: Ashok.Bhattacharya@warwick.ac.uk)
The group has now received four million euro from Dutch, German and UK firms to test their
lab-based technique in larger prototypes for commercial installation.