Ferhar Zahmet City Drinking Water

                                                                      FERHAR ZAHMET CITY DRINKING WATER

Sector: Municipal

Location: tferhar Zahmet Turkmenistan

Raw water source: Channel water

Capacity: 50.000 m3/day

The aim of tferhar Zahmet project is to treat Mash Channel water at 50 000 m3/hour rate by filtration and reverse osmosis system to obtain drinking and potable water needs up to GOST standards.

Water from Mash Channel is pumped to the 1st and 2nd precipitation pools for precipitation by the 100% backuped submersible pumps with 1400 m3/hour capacity of 1st pump station after rude and fine screens which are part of water intake system. Water from the pools will be stored in a pond with 250,000 m3 volume for necessary storage. tfine screening of the water intake system from the pond will prevent particles to reach treatment system. 2nd pump station which consists of 8 pumps, two of them as standby, will pump 2460 m3 water per hour from the pond to the treatment system. Before horizontal automatic multi layer sand filters 2.85 m in diameter and 12 m in length which combines low filtration velocities with high performance and minimal space requirement, water is tested for contamination and output by the water quality measurement stations. Before and after 9 sand filters combined in parallel and with 30,44 m2 surface area each and 9 carbon filters combined in parallel and with 23,17 m2 surface area and 9 m in length each, turbidity will be monitored to control system performance. tfiltered water will be stored at water storage of 700 m3 volume and fed to the reverse osmosis system by the 3 rd pump station; possible performance decline of the filters that might result from high physical contamination in water will be prevented by cleaning using filtered water as well.

Reverse osmosis feed pumps are designed to feed 573 m3/hour water at proper pressure and with their standby’s. This will enable to direct certain amount of water to the reverse osmosis systems designed in 2 parallel lines and with 288 membranes each, and the rest will be send to cartridge filters with total capacity of 825 m3/ hour for sensitive filtration after which both water will be mixed in treated water storage. Water quality measurement stations before reverse osmosis and on the mixing lines will monitor the performance of the system. Reverse osmosis systems will work without any performance drop thanks to automatic cleaning and rinsing units. Treated water will be disinfected by chlorination at the place with 14 000 gr/ hour capacity and stored in clean water tank. Water from clean water tank will be pumped to municipal distribution lines by 4th pumps station’s 8 pumps 2 of which are standby’s with the capacity of 360 m3/hour and at 120 mss pressure to provide drinking and potable water needs of
the city.

Project components are as follows:

• Electric, mechanic, static and architecture projects of all main and supplementary buildings of the treatmentfacility
• Mechanical and electric installation materials 
• Screens and penstocks of channel and pond water intake systems 
• Supply of raw water from channel 2xDN 700 
• 3000 kWenergy, transformer and generator building 
• 2 chlorine production units with 14 000 gr/hour capacity 
• Laboratory building andequipment 
• Mechanical workshop building and equipment 
• 4 pump stationbuildings 
• Transfer of clean water to the municipal waterset

Water treatment system components will be as follows: 

• Waterintakestructurefromthe channel
• (penstock and mechanical linear screens)
• 1st pump station (4x1440 m3/hour at 1.5 bar)
• 1st and 2nd precipitation pools and the pond (250,000 m3) 
• Water intake structure from the pond
• (penstock and mechanical linear screens)
• 2nd pump station (filtration feed pumps, 8x410 m3/hour
• @ 5bar)
• 9x270 m3/h horizontalsand filters (2.85
• m in diameter
• x 9m in length)
•  9x270m3/hourhorizontalactivecarbonfilter
• (2.85
• m in diameter
• x 9m in length)
• tfiltered water tanks (2x700 m3) 
• 3 rd pump station (4x390 m3/h @
• 2 bar, 6x573 m3/h
• @ 3bar)
• 2x250 m3/h reverse osmosis system 
• 2x875 m3/h mixed line cartridge filters) 
• Membrane cleaning and rinsing unit 
• 2x6000 m3 clean water water tank
• 4th pump station (8x360 m3/h @ 12 bar)
• Dosing and controlunits

The project which includes its own energy source with 3000 kW generator and transformer center, all administrative and supplementary buildings, mechanical workshop, laboratory and chemical building will be constructed on the total area of 140, 000 m2 and completed by 2016.