tender for design, supply, transportation, construction, installation, testing, and commissioning of 2 nos. of sewage treatment plants (stps) at doom dooma mb (1.5 mld) in waste stabilization pond (wsp) technology with co-treatment of faecal sludge for 6 kld and chapakhowa mb (1.0 mld) in activated sludge process (asp) with co-treatment of faecal sludge for 6 kld using on design, build, and operate (dbo) basis with sewage pumping station, nallah/drain outfall interceptor and diversion works, along with all associated civil, electrical, mechanical, piping, and instrumentation works, as well as operation and maintenance (o&m) of the complete system for a period of five (05) years after successful commissioning under sbm (u) 2.0.