Kerala Water Authority Tender

working charges

OD169175/2023-2024:Designing dual media through central/state Govt. Institution-Designing of dual media filter including under drainage system and air scouring system so that uniform back washing and uniform air scouring is obtained through uniform distribution of back wash water and compressed air, without any loss of the dual layer filter media and to attain the maximum efficient back wash and air scouring. (The dual media filter bed has to be designed considering the various parameters like raw water characteristics, desired rate of filtration, required filtrate quality etc. The design shall include calculation of depth of different media, considering the parameters like effective size and uniformity coefficient of the media, settling velocities of the media etc. The underdrain system and air scouring system shall be designed to avoid shooting up of lighter anthracite when air scouring is done. The design shall avoid interface chocking caused by mixing up of different layers at the interface in dual media filter beds.)

OD169174/2023-2024:Supply of Anthracite for the required quantity as per design, properly graded and tested by the supplier specifying the source of material and quality commensurate to the following specifications.Sp.Gravity:1.45- 1.55,uniformity coefficient-1.5,bulk density-0.73-0.75 T/m3,Hardness-3MOH,Hard grove:44- 55,carbon content:>90% above,Ash-3-4%,Volatile-5-7%,solubility-1.5% in 10%HCI/10% NaOH for 24 Hrs certification including all cost ,taxes,conveyance to site,loading&unloading etc. complete.(The contractor must submit the test certificate of Anthracite from State Govt /India Govt lab/ Institution to ensure the above-mentioned-Technical Circular No.KWA/JB/TMU/4659/2021 Dated 17.03.2021 latest.