Retrofitting of existing CLF no 1 and CLF no 2 at 50 MLD Assonora WTP with tube settlers to increase the overall production efficiency of treated water to 94 MLD

Design, supply, installation testing and commissioning of TUBE SETTLERS on galvanized mild steel builtup/ tubular sections in the clarification zone of the existing Clarrifloculator no. 1 & 2 unit for enhancing the settling efficiency of finely suspended solids thereby improving the quality of clarified water. Upon completion, the unit operational capacity should be increased from the designed 25MLD upto 47MLD (excluding overloading) per unit with an overall increment of 85- 90% in its process efficiency. Submission of the following designs and drawings, including getting the same vetted from NIT/IIT and approved by the Technical Sanctioning authority. The agency shall submit only one set in hard copy for approval. Once approved, the agency shall submit 3 sets of approved submissions in hard copy each stamped and signed by the Technical Sanctioning authority. The following Designs, Drawings and Documents to be submitted: (i) Hydraulic Design & Analysis and establishing Hydraulic flow diagram. (ii) Design & General Arrangement Drawings of TUBE SETTLERS including detailing and sections wherever necessary. (iii) Structural Design, Drawings, Detailing & Sections of supporting Galvanized mild steel builtup/ tubular sections and CLF bridge and any additional civil structure as and where required (iv) Design & Drawings of replacement to the existing bridge and scrapper blade assembly. (v) Electrical Single Line Diagrams (SLDs) and Paneling details for the motor/gearboxes of Flocculators and End Carriage Mechanism (vi) Data Sheets of equipment list and QAPs as per approved makes

Design, supply, installation testing and commissioning of TUBE SETTLERS on galvanized mild steel builtup/ tubular sections in the clarification zone of the existing Clarrifloculator no. 1 & 2 unit for enhancing the settling efficiency of finely suspended solids thereby improving the quality of clarified water. Upon completion, the unit operational capacity should be increased from the designed 25MLD upto 47MLD (excluding overloading) per unit with an overall increment of 85-90% in its process efficiency. Supply of approved plant and equipment on site including loading, unloading, transportation, stacking etc. complete. (i) Factory testing if any and submission of 3rd party inspection reports. (ii) CLF bridge mechanism with central bearing, end carriage, and flocculators - 4 nos each including motor/ gearbox/ slipring/ etc. (iii) Tube settler assembly. (iv) Cantilever supporting galvanized mild steel builtup/ tubular sections. (v) Modified galvanized mild steel scrapper blade assembly. (vi) Bolted end connections if any. (vii) Galvanized mild steel Collection troughs. (viii) FRP partition boards. (ix) Miscellaneous items required for completion of the work

Design, supply, installation testing and commissioning of TUBE SETTLERS on galvanized mild steel builtup/ tubular sections in the clarification zone of the existing Clarrifloculator no. 1 & 2 unit for enhancing the settling efficiency of finely suspended solids thereby improving the quality of clarified water. Upon completion, the unit operational capacity should be increased from the designed 25MLD upto 47MLD (excluding overloading) per unit with an overall increment of 85- 90% in its process efficiency. Installation, Erection and other Civil works etc. complete. (i) Increasing the area of ports of central shaft including breaking & remaking of RCC structure using epoxy bonding agent of reputed make. (ii) Installation of galvanized mild steel supporting plates on the stem of the unit and CLF bridge mechanism at requisite locations including drilling and inserting SS 304 grade bolts held in position by rapid setting grout of reputed make. (iii) Erection of factory made pre-fabricated galvanized mild steel supporting structure with end connections of SS304 bolted or welded type. (iv) Erection of FRP partition boards to act as baffle for tube settling zone held in position with suitable SS 304 grade bolted end connections. (v) Erection of tube modules over radial trusses, firmly held in position using necessary fast setting bonding agent so as to avoid short circuit flow, not passing through sloping plate or tube module. Spaces between the module and adjacent side wall shall be completely sealed. (vi) Radial erection of galvanised mild steel collection troughs with suitable V notches spaced suitably to ensure designed wier loading.

(vii) Making suitable launder opening in the RCC structure for the collection troughs and blocking the unwanted openings with suitable rapid setting sealent grout using epoxy bonding agent of reputed make. (viii) Making suitable opening in existing CLF collection launder and connecting to filter inlet channel with new launder (ix) Installation of all electrical panels and cubicals. (x) Painting of all structural steel members (un-galvanized) and wetted concrete surface with food grade Polyurethane/Polyurea/ Hybrid coating of atleast DFT 400 microns as per specifications. (xi) External painting of unwetted portion of civil structure with cement based paint of reputed make.

Design, supply, installation testing and commissioning of TUBE SETTLERS on galvanized mild steel builtup/ tubular sections in the clarification zone of the existing Clarrifloculator no. 1 & 2 unit for enhancing the settling efficiency of finely suspended solids thereby improving the quality of clarified water. Upon completion, the unit operational capacity should be increased from the designed 25MLD upto 47MLD (excluding overloading) per unit with an overall increment of 85- 90% in its process efficiency. Hydraulic testing of the civil structure on completion of the work all complete as per standard IS specifications.

Design, supply, installation testing and commissioning of TUBE SETTLERS on galvanized mild steel builtup/ tubular sections in the clarification zone of the existing Clarrifloculator no. 1 & 2 unit for enhancing the settling efficiency of finely suspended solids thereby improving the quality of clarified water. Upon completion, the unit operational capacity should be increased from the designed 25MLD upto 47MLD (excluding overloading) per unit with an overall increment of 85- 90% in its process efficiency. Trial run of the retrofitted clarifier unit for a continuous duration of 30 days etc. complete. (i) Daily sampling & testing of the influent, effluent from the retrofitted unit along with effluent from clarrifloculator unit for comparison. (ii) Standard method of sampling and testing to be adopted. (iii) All available tests to be conducted at WTP laboratory/ NABL accredited private laboratories in Goa. (iv) All testing to be done for 9 parameters and should include pH, TSS, Turbidity, Colour, Mn, Fe. (v) Atleast 3 samples from each retrofitted unit, sampled at equidistant and from the collection launder in every shift of operation, to be tested. (vi) Necessary charges towards the testing shall be borne by the agency. (vii) Complete Trial run to be witnessed by 3rd Party Inspector along with Departmental Representative and duly certified to be OK if found Satisfactory.

Design, supply, installation testing and commissioning of TUBE SETTLERS on galvanized mild steel builtup/ tubular sections in the clarification zone of the existing Clarrifloculator no. 1 & 2 unit for enhancing the settling efficiency of finely suspended solids thereby improving the quality of clarified water. Upon completion, the unit operational capacity should be increased from the designed 25MLD upto 47MLD (excluding overloading) per unit with an overall increment of 85-90% in its process efficiency. Submission of As-built drawings, Equipment manual, Warranty certificates, Operations manual in 3 sets of hard copies and soft copy on 1TB Hard drive

Design, supply, installation testing and commissioning of TUBE SETTLERS on galvanized mild steel builtup/ tubular sections in the clarification zone of the existing Clarrifloculator no. 1 & 2 unit for enhancing the settling efficiency of finely suspended solids thereby improving the quality of clarified water. Upon completion, the unit operational capacity should be increased from the designed 25MLD upto 47MLD (excluding overloading) per unit with an overall increment of 85- 90% in its process efficiency. Hands-on training to 15nos of Departmental staff towards operation and maintenance of the retrofitted unit for a tenure of 7 days post completion of trial run

Manufacturing and erection of new Flash Mixers along with paddles/ gearbox/motors It includes the following: Submission of the following designs and drawings, including getting the same vetted from NIT/IIT and approved by the Technical Sanctioning authority. The agency shall submit only one set in hard copy for approval. Once approved, the agency shall submit 3 sets of approved submissions in hard copy each stamped and signed by the Technical Sanctioning authority. The following Designs, Drawings and Documents to be submitted: (i) Hydraulic Design & Analysis and establishing Hydraulic flow diagram. (ii) Structural Design, Drawings, Detailing & Sections of existing Flash Mixer chamber (iii) Electrical Single Line Diagrams (SLDs) and Paneling of Flash mixer motor/ gearboxes (iv) Data Sheets of equipment list and QAPs as per approved makes.

Manufacturing and erection of new Flash Mixers along with paddles/gearbox/motors It includes the following: Supply of approved plant and equipment on site including loading, unloading, transportation, stacking etc. complete. (i) Factory testing if any and submission of 3rd party inspection reports. (ii) Flash Mixer motor, gear drives and paddles (for changes proposed if any) (iii) Miscellaneous items required for completion of the work