40 Recycling of waste and trash; Waste water treatment services; Waste treatment; Destruction of waste and trash; Incineration of waste and trash; Decontamination of hazardous materials; Sorting of waste and recyclable material; Upcycling in the nature of waste recycling; Air purification; Air deodorising; Water treating; Production of energy; Boilermaking; Custom manufacture of various boilers, condensers, reactors, towers, heat exchangers, gas cold boxes, pressure vessels, fired heaters, power plant boilers, condensing systems, storage tanks, vacuum chambers, cryogenic tanks, wind power generators, solar cells, coal unloaders, electrostatic precipitators, air coolers, plate type heat exchangers, tubular or belt type conveyors, incinerator dumping gate devices, dosing devices, filtering devices including filters and bag filters, heating equipment including heaters and air preheaters according to client's specification