1. PLANT WATER SYSTEM Water system facilities for the complete power plant are provided under the following categories. (i) (ii) (iii) (iv) Water Treatment System RO & EDI system Waste water treatment plant Sewage Treatment Plant The water from Montage Jacquot Sewage Treatment Plant shall be used for Water treatment plant, Firefighting system, Auxiliary Cooling tower Make-up, and other miscellaneous utilities uses. Fire water requirement shall be fulfilled from Filtered water storage tank. with appropriate sets of Fire pumps. Separate Fire water reservoir shall not be considered and we will create dead storage in Filtered water storage tank to meet out the norms of applicable standards of Fire protection system. Two (2) nos. of raw water centrifugal type booster pumps (1W+1S) of capacity 250 m3/hr shall be provided in order to pump treated sewage water from Montage Jacquot Sewage Treatment Plant to water treatment plant. (i) WATER TREATMENT SYSTEM: PRE TREATMENT SYSTEM: AERATION TANK: The water is mixed with biological agents and then aerated. The increased oxygen promotes the growth of the beneficial biological material. That material will consume unwanted waste products held in the water. Finally, the beneficial material will grow due to the increased oxygen and food, which makes it easier to filter from the clean water. CHLORINATION The water is dosed with hypochlorite for the disinfection purpose BOILER FEED WATER REQUIREMENT: MULTIGRADE SAND FILTER. MGF contains sand supported by gravels and pebbles as filter media, which removes the residual suspended solids from the feed water. ACF: ACF is used for removal of taste, odour, colour and Chlorine. The most common application is removal of undesirable taste & odour present in chlorinated water supplies. The end product is clean water with no objectionable taste. ULTRA FILTRATION SYSTEM Filtered water is passed through the UF plant where it will be pressurized through Ultra filtration membranes for removal of the COD, BOD, suspended impurities. Ultra filtration skids are backwashed by back flush pumps. UF system shall be cleaned periodically by using cleaning chemicals like NaOCl. Wastewater generated during chemical cleaning needs neutralization before disposal, this is not considered in this proposal. RO-1 & RO-2 WATER SYSTEM SMBS DOSING The water is dosed with Sodium Meta Bi Sulphite for the reduction of free chlorine. ANTISCALANT DOSING The water is dosed with Anticsalant to prevent the RO membranes from scaling. ACID DOSING The water is dosed with acid for pH correction. CARTRIDGE FILTER The chemically conditioned water is then feed to micron cartridge filter having cartridges of 5 micron nominal rating. Purpose of this cartridge filter is to basically remove very fine particles. This will also work as a safe guard of SDI. The water from cartridge filter will then be passed to RO unit by means of high-pressure pump to get the RO product water. A BRIEF ON REVERSE OSMOSIS PLANT SYSTEM REVERSE OSMOSIS SYSTEM OPERATION Anticsalant is added prior to the guard filter to increase the solubility threshold limitation of sparingly soluble salts such as CaCO3, BaSO4 and CaF Bisulfite pH meter controls acid dosing. A sample valve is provided after anticsalant addition for manual sampling to check the performance of anticsalant dosing. The chemically conditioned raw water will then passes through 5-micron cartridge guard filter to ensure removal of suspended solids. Pressure switches are provided at the common header of inlet & outlet of cartridge filters. REVERSE OSMOSIS SYSTEM The pressurized flow enters the RO system. Due to high pressure, a portion of the feed water permeates through the semi-permeable RO membranes as pure water while the balance of the flow exits the system as reject. The RO system consists of Three stages. The Low pressure are provided at RO high pressure feed pump suction which provides protection for dry running of pump and also protect the membranes from high pressure exposure. The conductivity indicating is provided on the RO permeate line monitors the product water quality. The auto dump valve is provided to drain the product water if the conductivity at RO outlet is not within the set limits. CLEAN IN PLACE SYSTEM A cleaning /flushing system is provided for the RO chemical cleaning. A system cleaning is required when the normalized permeate flow is reduced by 10-15%, or the differential pressure (DP) increases by 15 percent from the reference conditions The operation of cleaning has to be initiated manually for each bank; the cleaning solution preparation operation is totally manual. A level Switch is provided on the cleaning tank. Based on the feedback from the level Switch, there would be indication that cleaning tank to be filled with RO permeates water. The 10-micron cartridge type guard filter is provided after the cleaning pump to prevent passage of suspended solids removed during the CIP cycle back onto the RO membranes. The RO Cleaning Pump will flow cleaning solution through each stage of an RO train. The overall rate is based on the number of RO vessels in a train and the step of the cleaning process and is controlled by manually at pump delivery. EDI System The Electrodeionisation process should be a Combination of Ion exchange membranes, Ion exchange resins, DC electric potential System must be design with the minimum numbers of module with qualit y commitment & one frame construction along with control panel. The Electrodeionisation system shall be designed in such as way that shall not be any Concentrate recirculation The complete deionization process should be a Chemical Free Process The system configuration should be Plate and frame type. The EDI system should be fully automatic The Design of the EDI system should not involve any Brine Injection. There shall not be any salt bridging Asset Recovery. The modules should be arranged vertically. PH CORRECTION DOSING The water is dosed with NaOH/Na2CO3 for PH Correction. DESIGN BASIS AND SCOPE OF SUPPLY OIL SKIMMER No. of Streams : 1 No. (1 X 100%) FAB tank Inlet flow : 173 m3/hr FAB TANK: No. of Streams : 1 No. (1 X 100%) FAB tank Inlet flow : 173 m3/hr. TUBE DECK SETTLER: No. of Streams : 1 No. (1 X 100%) Clarifier Inlet flow : 173 m3/hr. Clarifier outlet flow : 173 m3/hr. Operating Hours : Continuous Operation mode : Manual MAIN TREATMENT: MULTIGRADE SAND FILTER No. of Streams : 2 Nos. (2 X 100%) MGF capacity : 78 m3/hr. Operating Hours : 24 hours Operation mode : Manual ACTIVATED CARBON FILTER No. of Streams : 2 Nos. (2 X 100%) ACF capacity : 78 m3/hr. Operating Hours : 24 hours Operation mode : Manual ULTRA FILTRATION No. of Streams : 2 Nos. (2 X 100%) UF capacity : 26 m3/hr. UF Recovery : 90% Operation mode : Semi Auto RO-1 SYSTEM No. of Streams : 1 No. (1X100%) RO capacity : 20 m3/hr. RO Recovery : 75% Operation mode : Semi Auto RO-2 Plant No. of Streams : 1 No. (1X100%) RO capacity : 17 m3/hr. RO Recovery : 85% Operation mode : Semi Auto EDI UNIT No. of Streams : 2Nos. MB capacity : 15 m3/hr. each Operation mode : Auto EFFLUENT TREATMENT PLANT OILY WASTE WATER TREATMENT REQUIREMENT: CORRUGATED LAMELLA INCEPTOR (CPI): For removal of free oil as well as TSS we provide CPI. The cross flow lamella pack consists of a number Tilted lamellas mounted parallel to each other at a close spacing. The effluent containing free oil, grease & suspended solids passes in horizontal direction between the lamellas. Laminar flow conditions are established while the water flows across the pack from the inlet to the outlet die. Laminar flow conditions are essential for the effective gravity separation of the water and suspended continents. In the course of passing from pack inlet to pack outlet, the sludge moves towards the bottom of the corrugations and slides down the incline of the lamella. From there the sludge is collected in a hopper to be discharged intermittently through a blow off value. Settled sludge cannot re-contaminate the treated water. In the corrugation bottom, a high sludge concentration is established. This is the ideal condition for particle agglomeration to take place. (agglomeration is the formation of large and relatively heavy particles from small and relatively light particles.) Moreover, sludge move in separate directions, to the flow of the water, the danger of particle re-entertainment has been completely eliminated in the design of the cross flow separator (when re-entertainment occurs, particles once separated from the mother liquid are put back into suspension. Supports with so-called place "spacers" hold the Tilted lamellas in place providing strength and liquidity to the pack structure. Treated water coming after CPI will collect to sump and pumped to Ash Water Sump, and Oil, which is separated from CPI, shall be collected in Slop Oil Tank, While Oily sludge, which is generated from bottom of CPI, shall be collected in sump and pumped to Collection Sump. COAL PILE OFF: Lamella settler All liquid effluent after required treatment shall be led to the effluent sump and pump to the Lamella settler. Coagulant and poly solution shall be added to the water for the effective separation. The treated water shall be stored in a clear water reservoir. The sludge s generated from the settler shall be collected in the sump and treated effluent will routed to CMB basin Central Monitoring Basin Effluent From t Lamella settler shall be collected in CMB which acts as an equalization basin after CMB effluent shall pump to gardening, Dust suppression in CHP and further uses. (ii) SEWAGE DISPOSAL SYSTEM Sewage generated in different area will be treated through septic tanks and up-flow filters located in individual areas. The treated water is used for horticulture in locations where large quantity of sewage is anticipated. The no of persons considered as 150. The inlet quality of water considered BOD as @250 mg/l and TSS as @260 mg/l, and the outlet parameters shall be restricted to BOD=20 mg/l and TSS=20 mg/l