bids are invited for removal of mbbr media from mbbr tank tube settler media from tube settler tank , supply of chemicals for sewage treatment plant , material for replacement of quartz silica sand , material for replacement of pebbles , material for replacement of gravels , taking out complete pebbles from the filter and refilling the same pebbles , material for replacement of activated carbon , material for drying bed media i.e. pebbles 40 65mm , material for drying bed media i.e. pebbles 20 40mm , material for drying bed media i.e. gravels 10 20mm , material for drying bed media i.e. silica sand 4 8 grade , carrying sample for testing of treated water of stp and submision of detailed test report to the office , supply laying jointing weliding and testing ms pipe , supply and mixing of sodium hypochloride , supply and mixing of poly electrilite 100 percent , supply and mixing of de watering poly electrolite 100 percent , overhauling of air compressure coupled with blower motor 7.5 hp capacity ,supply only compressure 90 oil suitable for air blowers , mand l for one coat of synthetic eamel paint to exposed filtermedia tank , m and l for painting to exposed ci gi ms pipeline including sluice valves , materials and labour for cibutterfly valve of 40 mm bore stainless steel disc , all as peritem no 22 but 50mm bore. , all as per item no 22 but65mm bore. , all as per item no22 but 80mm bore. , all asper item no 22 but 100mm bore. , cleaning of equalizingtank grit chamber oil grease chamber stilling chamber ofsewage , cleaning of sludge holding tank of sewagetreatment plant and removing of settle down sewage sludgecum mud , cleanig of tube sttler of sewage treatment plantand removing of settle down sewage sludge cum mud ,cleaning of tester water tank with chlorine contact tank ofsize upto 6 mtr x 2.4mtr x 1.8mtr stp by removingyears of past experience required for3 year (s)same/similar service total quantity : 47587