We have been in the water and waste water treatment 1990. Initially,we imported our equipment from UK and Switzerland. Due to increase in parity rates we developed the aerators and pumps in Sri Lanka going JV with a leading pump manufacturer who has over 60% market share. HSI developed the design for a zero sludge sewage treatment plant. The first unit has been in operation for over 10 years 4 systems are in operation. We have now developed 3 submersible aerators and promoting this system nationally and and on the look out overseas partner promote this system Internationally.