aerator tanks qatar. 48. aerator tanks qatar

 
48aerator tanks qatar  What do you think the problem is? Could it be the solenoid valve that needs replacing? Reach4 Well-Known Member

that the average concentration of solids in the sludge zone is:-l mg. 5–6. FIGURE 1 shows the flow pattern determined in model. Landia PODB-I propeller aerators are typically used for: - Aeration of both sludge and wastewater - Combined mixing and aeration - Elimination of odours from wastewater - the wastewater is kept fresh - Additional aeration at peak loads - Cleaning/flushing of equalization tanks . Inside this chamber, the pvc pipe is directed downward about 5. List of jet aeration companies, manufacturers and suppliers serving QatarThese were the updates on the Israel-Hamas war for Monday, November 20. Scissor Lifts. An aerating machine can be applied to your existing. 5 feet. This condition is mainly associated with the characteristics of the aeration modes for bioaerosol emissions from wastewater (Han et al. 3–18. Filters. The smaller the bubbles the air stone produces, the better. The Tornado self-aspirating aerator aerates on its own by drawing air from the surface and injecting it beneath the surface. Additionally, because the use of pure oxygen avoids the compression and stripping of large amounts of nitrogen, the power requirements and emissions are lower than in regular aeration. With a maintenance plan , Partridge Well will send a pump technician out once a year and check you well & pump system to. The Aqua Safe ® “TRIO Series” is a four compartment fiberglass tank configuration with a chlorination device. 5 to 75 kW). Thereafter, A. 5 Cubic foot of Centaur carbon filter media. 00. ₱278. raw effluent lift sump . 222 8-5 Secondary treatment process schematic - Hartford, CT 226 8-6 OTE characteristics - Hartford, CT . Its ability to be fully customized makes it an ideal choice for almost all aquarium setups. Mixing the aeration tank contents is also an important consideration in the design of oxygen transfer devices. The deal would cost an estimated $406 million. I would go straight to the aerator from the well pump and use a float switch in the aerator tank to turn the pump on and off. Now, the challenge for you is how to keep your bait alive as you fish which is where a portable aerator can assist. Opens in a new window or tab. 115V or 220V with Exhaust Fan. If pond health is really bad, chemicals may be needed on top of aeration. Buy Online our innovative aerator tank for well water which is use to oxidize the dissolve iron and Sulfur from it and can save the water from algae and. By diluting the water stream with air, aerators significantly reduce the volume of water flowing from your faucet. 99. 1 Diaphragm pump. 00. A 2018 study that used tilapia tanks for wastewater polishing also showed high. The aeration system distributes and provides air supply (oxygen) in aerotanks to create the necessary oxygen regime (Dyagelev et al. Free shipping. 4. 100+ bought in past month. Our plastic septic tank are designed for durability and quick, easy installation. Sellers with highest buyer ratings;. The aerator tank pump then moves the water to a second bladder tank that pushes the water to the water softener and then to the house. Complete installation of a Norweco system by Farmington, NH-Based A. When a wastewater treatment plant becomes unstable and nears or exceeds compliance limits, you need quick response to correct the problem. Grand 10000 venturi jet aerator pump for aeration in biofloc. Put the lid back on. ET), with the first group of 13 hostages to be released at 4 p. We also investigated Improving Mixing in Water Aeration Tanks Using Innovative Self-Powered Mixer and Power Reclamation from Aeration Tank and results showed a good improvement in SOTE [10] [11. Rogers, AR. 64,000 running hours, zero. 25 to 1. Reservoirs and Storage Tanks; Clarifiers; Clearwells; Aerator Tanks; Reservoirs and Storage TanksThis study developed a new type of micro-pressure swirl reactor (MPSR) for treating rural domestic sewage with variable water volume in northern China. Best Push Spike: Agri-Fab 16-Inch Push Spike Aerator. from China. Keep air mixing on at all times. Diffusers are submerged in aeration tanks and break the air (provided by blowers) into bubbles for the aeration process. I assume the tank switch is the solenoid that controls it. The most simple aeration tank is the complete mix tank provided with one surface aerator or with bubble aeration on the bottom. #9. Typically they are small mesh screens that break up the flow of water into multiple small streams, adding air in between. Fountains aerate water by spraying it into the air. The transport tank is thermally insulated, the space for the fish has the dimensions of 4. 1 offer from $8. It was transported and installed as a complete system requiring minimal site preparation. Aerator, 2 pumps, & tanks. The rest is waste. 0 cm Rate of Discharge : 18 – 36 cum/hr at 2. 09, 0. Depending on their size, the bubbles can be: fine bubbles (with diameter between 1-1. 7/17/2013. 00. Combined aeration and mixing of wastewater in small and medium-sized tanks. Oxygen is needed by the bacteria to allow biodegradation to occur. 09 sqm/cum. Messages 38,285 Reaction score 4,268 Points 113 Location IL. Many conventional septic tank systems have an effluent filter on the discharge of the tank. Don’t sacrifice indoor air safety due to increased energy costs. About SSI;aeration tank is often built with a serpentine pattern, like that shown in the diagram below, in order to obtain the desired plug flow without an excessive length requirement for the tank. The diffusers are installed in a pattern on the bottom of the tank or lagoon for uniform coverage. Genie. Once settled in a separate settling tank, bacteria forming the "activated sludge" flocks are continually recirculated back to the aeration basin, increasing decomposition rates. Being closer to our international clients allows us to ensure efficient and immediate service. Possible recommendations are to. aeration tank F:M ratio, if given suitable aeration tank influent and aeration tank parameter information. In diffused aeration, oxygen is mixed with the wastewater to allow the anaerobic bacteria to digest biosolid particles in the water. Apr 17, 2022. The aeration is carried out by fine bubble diffusors. C. 0. 10 Common Questions on Aeration Tank In Wastewater Treatment Plant. 39 cfm. “The tank was designed and constructed underground with a capacity of *28,000m3 as an alternative to using almost 3,000 tankers for dewatering,” Ashghal said in a statement. 7 feet with louvers) and 10. 75 to 22. . minimum required oxygen should be 2mg/L to4. Save 5% with coupon (some sizes/colors) FREE delivery Wed, Nov 1. This can be useful in hatchery, recirculating aquaculture. Moreover, aerator systems are also effective for treating iron and manganese in residential well water. local time on Friday (12 a. View more. 19. These artificial aerators are utilized for handling municipal, industrial and agricultural wastewater, as well as to revive, chemically stabilize, or maintain stagnant small water bodies. Foss offers cost-effective service contracts for approximately $175/service visit. aeration tanks or reducing mixed liquor suspended solids [10-16]. m. 1 Conventional aeration. Glass is fused with steel in order to enhance its strength. It will also include the entry of aid and fuel, and the release of 150 Palestinian prisoners — women and children — held in Israeli jails, according to a Hamas statement. 5 to 75 kW). The first step is to determine the size of your septic tank. Alternatively, aeration tanks may be sized using sludge age. Get the PDF spec sheet. 3) And the third is sludge recirculation, either. Aerators are impervious to moisture, eliminating mildew and drying time after tank cleaning. Continued testing, research and development has meant that we have kept up with the times and today can offer energy-efficient mixing combined with the longest equipment life in the industry – something we are of course willing to guarantee! Typically Florida Pump Service installs 250-gallon fiberglass aerators. C. $2328. 03 – 0. EP Aeration’s bottom-laid, fine-bubble aeration systems have the highest oxygen transfer and circulation rates per horsepower, making them. SSI is a manufacturer of aeration diffusers & wastewater treatment systems. Jet aerators are applied across a wide range of water, wastewater and biosolids treatment applications. 5 kilowatts). مايو ٢٠١٧ - الحالي 6 من الأعوام 7 شهور. We offer below ground septic tanks ranging from 200 to 1500 gallons. This arrangement will result in 50% system turndown – much lower than needed. Under the condition of the same quantity and quality of the influent water, the dissolved oxygen concentration in the aeration tank is also lower as shown in Fig. Our plastic septic tank are designed for durability and quick, easy installation. #6. 5 kW. 0 (M & E), depending on the type of aeration equipment used. A jet aerator can be installed without emptying a tank or basin. The 6 nozzle Aeration manifold scrubs, oxidizes, and aerates (mixing of air and water), and the Methane Gas is blown out via the Exhaust Blower System through a 3″ PVC or similar pipe, and vented outside the home. Action Manufacturing & Supply offers a limited 10 year warranty on the aerator tank from manufacturing defects. Height including control valve 61 inches. When implementing this strategy, flow control valves are removed from the system, the VFD, usually supplied as an integral part of the motor control center (MCC) of the plant, receives the output signal of the controller (usually 4-20 mA) and in turn changes the speed of the air blower. Scientists don’t recommend using a continuous-flow aeration tank without regeneration of the activated sludge for wastewater treatment, having a concentration of organic contaminants (BOD 20) of more than 150 mg/L (Henze et al. 99. Protank offers the best polyethylene plastic below ground storage tanks available today. The main types of subsurface aerators include coarse bubble aerators, fine bubble aerators, and jet aerators. Learn about the different types of tanker ships and dangers involved with them. Packaged Wastewater Plant for US Navy Air Station Fluence supplied a 300,000 GPD advanced extended aeration wastewater system to treat domestic waste at the U. Model EP-2006 Uni-2 - Reservoir Systems Made in San Luis Obispo, CA U. The mixed liquid then enters the settling or. water jets not shutting off on well aerator tank Thread starter coolcat7fl; Start date Feb 5, 2014; Users who are viewing this thread. 465 to 0. However, once the pressure. When monitoring the operation of an aeration tank, the operator should look for the three physical parameters—turbulence, surface foam and scum, and sludge color and odor—that aid in determining how the process is operating and indicate if any operational adjustments should be made. We also manufacture and repair pressure vessels for oil and gas industries. 99. E. m. Aeration Tank Sizing. in the final clarifier is equal to 30% of the mass in the aeration tank and . The Tornado blower-assisted aerator is used for applications requiring a higher level of oxygenation. air supply pipe line. Aeration Tank Loading lb BOD/day/1 000 cu ft Percent BOD (g BOD/m3 d) Removal 40 (640) 90 80 (1 300) 80 120 (1 900) 70 160 (2 600) 60 200 (3 200) 50 240 (3 800) 40 As with aeration time, aeration tank loadings in g BOD/m3-d (lb BOD/day/1000 cu ft) This unit is a larger version of the 25 and contains a finish water tank on board. Without the presence of sufficient oxygen. Underground Septic Tanks. Quick View. Tank Size & Household Wastewater. 0. Get special offers, deals, discounts & fast delivery options on international shipping with every purchase on Ubuy Qatar. As air is forced into the aeration basins, it increases the activity of these microorgan-isms and helps keep the organic waste thoroughly mixed. 0-3. The Aquadisc 250-305 & 320 fine bubble disc diffusers are designed for aeration of activated sludge tanks and basins in municipal and industrial wastewater treatment plants. As with all tow-behind aerators, you will need a lawn tractor or UTVs to attach to the universal hitch. Mega reservoirs and pumping stations will be constructed at five strategic locations along the Qatar National Utility Corridor. The solenoid valve is 110 vac and is on the outside of the aerator tank. The flow pattern caused by the mechanical aerator and the level of the flow velocity depend on the power consumption of the aerator as well as on the shape and volume of the aeration tank. In this paper, a gas–liquid two-phase testbed is built to explore the aeration performance and internal flow in an aeration tank, including an inverted-umbrella impeller (immersion depth of 0 mm, rotational speed of 250 r/min). These furnished consisting of perforated trays and vent condenser with the internal spray distribution. Emergency Aeration. . It is clear to see that aerators are the key. Currently, two blowers are supplying air to diffusers submerged 20 feet in thePowder & Bulk Processing. The walls of these tanks are. Specifications: Introduces oxygen close to the bottom of a water tank (Diffuser will float on surface and will need to be weighted down or attached to a vertical piece of PVC pipe in order to stay submerged. SENTRY I OPEN AIR METHANE SYSTEM. Qatari Emiri Land Force Tanks and vehicles Fire support/Artillery 40x Carl Gustav M2-550 84mm recoilless rifles 48x MBDA HOT anti tank missile launchers with 1,000 missiles 100x MBDA MILAN anti tank missile launchers with 630 missiles Bofors AT4 CS light ATRL Swingfire anti tank missile INVEST’s mixing, aeration systems treat Qatar’s wastewater | Wastewater Digest. O2/BHP-hr for mechanical aeration systems. GFS is a dual material that blends the strength and flexibility of steel and excellent corrosion resistance to the glass and Glass Fused To Steel tanks can deliver some advantages over epoxy standard or soldered painted storage tanken. Free shipping, free returns. The devices most commonly used to increase aeration in fish tanks are filters, power heads, air stones, and aerating decorations. Diffused aeration systems use pressurized air released through diffusers near the bottom of the tank. Aerators are impervious to moisture, eliminating mildew and drying time after tank cleaning. Here’s how it works: Attach the air stone to one end of the tubing. 19. Note that this pipe length must not exceed 4 feet in length. 4) Aeration systems to transfer oxygen 5) Secondary sedimentation tank to separate and thicken activated sludge. aerator. m. 1pc Air Pump Sand Stone Aquarium Oxygen Pump Fresh Air Stone Bubble Bar Aquarium Fish Tank Aerator Pump. REQUEST QUOTE These solar-powered aerators reduce the costs associated with conventional chemical treatments and eliminate the need to install and operate electrical equipment. Bubble Diameter: 1 mm. This offers a back-pressure resistance of only 0. 5 feet tall. Aeration is a unit process in which air and water are brought into intimate contact. 4. Quick Facts. 0mg/L is enough. HELP LINE 1-800-722-3212. The aerator includes a blower, which forces more air. The sequencing batch reactor process ( SBR ) involves a single complete mix type reactor in which aeration takes place followed by clarification, whence the designation “sequential”. The supplied oxygen is utilised by bacteria in the wastewater to break down the organic matter containing carbon to form carbon dioxide and water. The sludge is loaded with microorganisms and mixed with air or pure oxygen. Chlorination or peroxide injection systems available to treat the water as it flows into the tank, as well as various. Free shipping. 19. Conclusion. 3 to 4. 7 CFM. 0 milligrams per liter (mg/L) and 2. $3,465. The Agri-Fab plug aerator has 32 galvanized plugs that will penetrate to a depth of three inches. tank. 8. 00. 0 m (5. Ariston Electric Water Heater 80L BLU-R Horizontal | BLU R 80 H. In a Telegram post at 3. QCS 2014 Qatar Construction Specifications (Section 5) PART 19-TESTING OF WATER RETAINING STRUCTURES. Rule of thumb requirements for mixing in aeration tanks range from 0. Constructed of all FDA approved materials. The liquid pumping action results in oxygen transfer when the spray, produced by the water breaking, comes into contact with the air. The biodegradation of organic matter under anaerobic conditions is a very slow biological process. They do this while maintaining the feeling of a high-pressure flow. Brand New. Installation is complete. Mechanical aerators have similar estimated values of between 2. The aerator can also be supplied in stainless steel where required. With the intensification and industrialization of aquaculture, there is an urgent need for new high-performance aeration devices and energy-saving aeration technology to achieve oxygen saturation. This allows treatment plants to adjust their tanks to deliver less oxygen and save on energy costs. costs approximately $6,750, and includes the system’s first two years of service. 48. Water Age. J. 18 (9) Portable Solar Oxygen Pump for Fish Pond Aeration and Fishing Box - Silent and Efficient. Sizing of aeration tanks for optimal performance in general involves providing about 2 gallons of tank space for each anticipated gallon-per-minute of service flow of the unit. DUKE-AERO1. WETS has installed or retrofitted hundreds of aeration water treatment systems for its clients in its over-45 years history and has developed a wide variety of high-efficiency aeration and stripping processes and equipment. 17. If the filter becomes clogged with solids, it will slow the. Best Small Pond Aerator. Tank fabricator jobs in Doha +25 mi +25 mi. Center Enamel designs, manufactures and installs aeration tanks of 20 cubic meters to 25,000 cubic meters. Final Verdict. Vintage Action Alligator Head. Once installed, the top of each tank (trash tank, aeration tank, pump tank) should have no more than one inch variation in. There is a blue about 4 inch diameter cover with 6 or 8 screws in it with a water line running through it, it has a screw when opened lets water out and the jets inside the tank go on. View. 5. g. 18B. We specialize in pumping, agitation, mixing, separation and purification technologies for fluids of all types. 3) Excess sludge wasting and disposal facilities. Glass is fused with. Learn More. Floatable surface aerator generally consists of a top mounted. settling tanks, aeration tanks etc. This system can support a maximum water flow of 14 GPM and can handle water-feed pressure up to 60 PSI. Monitoring of work of the aeration tanks of operating town treatment plants is done. Effluents are stored from 8 to 12 hours in the equalization tank resulting in aParts for Water Treatment Aeration Systems. The laboratory system included an aeration tank and a secondary settling tank. Aerators can also be used to control the flow of water through a pond. 1. 99. 5 lb. When it gets too low, the float. Also, installed vertically inside the Aerator Tank is a submersible pump needed to re-pressurize the water supplying the home or. Aeration. Explore our complete line of cost-effective, low-footprint products to meet all your aeration needs. The aeration tank is mainly composed of three parts: tank body, aeration system, and water inlet and outlet. 1 kg BOD 5 (kg VSS) −1 d −1). Which ensures the best oxygen transfer and prevents the. The Aeromax system is designed to provide years of trouble-free service using a water treatment method known as aeration. Equipped with an EPDM membrane that prevents water from entering the distribution pipework when the air is turned off. 2. Since our plastic septic tanks are made out of polyethylene, they are unaffected. ATB-LSA - surface aerator / rotary aerator. Completely. $50. 0; 0: 2; 3: 4; 7; Free returns. 0 to 9. Table 3 displays the average concentrations of aerosolized S. ET), with the first group of 13. The air bubbles rise to the. It's available in sizes from 2 to 100 horsepower (1. In our experience, flow velocities of 15-20 cm s- 1 are sufficient for this purpose. Under this expansion project, Samsung C&T will be the exclusive partner in charge of engineering, procurement, and construction (EPC) as well as building three 187,000m³ LNG storage tanks, three loading facilities, and transport pipes. The biodegradation of organic matter under anaerobic conditions is a very slow biological process. 400+ postings in Qatar and other big cities in Qatar. To help achieve that perfect balance, we've developed a full portfolio of aeration blower solutions to fit the wastewater treatment process's different needs. It's controlling the water level in the tank. AIR PUMP. The ZEPHYR ® induced-air flotation system assists in the removal of fats, oil, and floatable solids by creating fine bubbles that attach to solids and bring them to the surface, making it ideally suited for oil and grease recovery. Literature had shown that the respiratory and intestinal diseases of workers at WWTPs are related to bioaerosols. This page features parts for high capacity, full-vent aeration systems. The tank can be square or circular. 7 to 2. Water Heaters Buy Online with Best Price. u / 7000. The aerator can also be supplied in stainless steel where required. Typical coarse-bubble diffusers provide an oxygen transfer rate of about 2. The Bio25 has a front deck for the pumps and re-pressurization system, making maintenance very simple. Get special offers, deals, discounts & fast delivery options on international shipping with every purchase on Ubuy Qatar. 24/7 technical support with plant start-up and operator training available. To facilitate assembly and possi-ble future disassembly for cleaning, use union fittings at each tank, rather than “ hard pipe” the connections. 4). delivery pipe 5. sera air set ``S`` incl. List: $45. Gasco Steel specializes in design and fabrication of lpg tank, API tank, STI P3 tank, fireguard tank, day tank, air receiver tank, container tank, fuel mobile tank, steel water tank, crude and lube oil tank. Aerating produces Open / Close Mouth Action. collection tank 3. This custom engineered solution is one of two all-weather, turnkey blower systems for a wastewater treatment facility in rural Kansas. Buy yourself a 12V bait tank aerator and run the aerator hose to a hose barb you fabricate in the top of your holding tank. In theory, oxidized forms of P are not released into. Yellowpages. ) media occupying 35% to 60% of empty tank volume • Aeration keeps media suspended and provides DO for respiration • Aeration system similar to activated sludge process, primarily by air blowers and coarse bubble diffusers • Excess growth sloughs off and leaves with effluent Abdullah Ibrahim Jaidah & Sons (100% Qatari Company) was established in 1973 in the State of Qatar as a manufacturer of Tents & their Accessories and later on expending the expertise and business to Car Parking Shades, Tents, Tensile Shade Structure solutions across the GCC region; we have more than Fifty years of experience in designing specialize structures. Home. An Äager Brand ERGIL designs, and manufactures two basic types of deaerator which also called deaerator tank, boiler feedwater deaerator or deaerator vessels tray-type and spray-type. What's new. Scrub the insides and all portions of the aerator and tank using a sponge while wearing the gloves. 32, and 0. Branches. variations in wastewater characteristics, aeration tank layout, and aeration system equipment. Storm water retention tanks, and balancing tanks. Reading and understanding product schematics and. The problem I have is that the solenoid burnt out (I'm guessing). Qatar's Foreign Ministry on Thursday announced a temporary Israel-Hamas cease-fire will begin at 7 a. cyclestopvalves. 5 pounds. Put on latex gloves. The microbes then feed on organic material, forming flocks which easily settle out. K&J. Qatar Building No. Seamless molding technology. Fishernomics Wireless Live Fish and Bait Aerator. #9. Zurich, Switzerland. 2 m. Mechanical aeration systemsfrom Flygt provide an affordable alternative to our highly efficient diffused aeration systems. Solar Powered/DC Charging Oxygenator Aquarium Fish Oxygen Pump Pond Aerator. stage, sewage is pumped into aeration tanks. 64. g. Mechanical aeration systems use agitators or mixers to mix air and mixed liquor. An aeration tank is a biochemical reactor designed according to the characteristics of microorganisms and uses the activated sludge method for wastewater. Best Push Spike: Agri-Fab 16-Inch Push Spike Aerator. In wastewater treatment plants, sewage is channelled into sealed aeration tanks, which can be placed indoors or outdoors. Messages 6 Reaction score 0 Points 1. Premium Efficiency IE3 motors from 1. Wastewater aeration is a process that occurs when air is added directly to wastewater, which allows for aerobic bio-degradation of any pollutants contained within. 2. The Port Washington Wastewater Treatment Facility in Port Washington, Wisconsin chose Atlas Copco’s ZS VSD+ screw blower to power their facility 8 years ago. Aeration devices range from a simple, open holding tank that allows dissolved gases to diffuse into the atmosphere to a more complex aeration system that has a column or tower filled with packing material. If the system was properly tuned, the. 8) Sludge Drying Beds- This unit is meant for dewatering and drying the excess biological sludge. Engineering Consultants Group S. Aeration systems. Fish Air Pumps & Co2 Eq. The tank can be square or circular. In a mechanically aerated system, consider the number and location of mechanical aerators. TheTABLE IL Relationship between aeration tank loading and percent BOD removal. 75” x 5. 320 sold. Each may be sized to provide 33% design capacity; the resulting turndown is 83%. In other words, If you anticipate service a service flow of five gallons per minute, be sure to provide at least ten gallons of aeration tank spaceContact Us (974) - 44655808; C/O: DUTCO TENNANT QATAR WLL Regency Business Center 6th Floor, Office # 602 Building # 402, Zone 18, Street 200 Al Corniche, P. The pH of the aeration tank should be between 6. com. Fish Tank Oxygen Pump Air Refiner Silent Aerator Air Disk Grass Tank Atomization Fish Aquarium Nanobubble Stone. We recommend you check it once a month and add 1 cup of bleach to the holding water to ensure a clean system. Constructed in AISI 316 throughout, large bubble tubular air diffusers are used where the liquid has to be both mixed and oxygenated. an ISO 9001: 2008 certified company is the leading Manufacturer and Exporter firm offering Rubber. aerator. 2 × 1. Aeration is an activated sludge process, promoting microbial growth in the wastewater. to the aeration process are key to reducing energy consumption. Qatari Emiri Land Force Tanks and vehicles Fire support/Artillery 40x Carl Gustav M2-550 84mm recoilless rifles 48x. The aeration tank generally receives pre-treated wastewater, so it is less corrosive than the corresponding original wastewater. Now the softener system does not work and we have to manually go out and turn the solenoid valve thing to refill the aerator tank. Shop HITOP Dual Outlet Aquarium Electric Air Pump, Whisper Adjustable Fish Tank Aerator, Quiet Oxygen Pump with Accessories for 20 to 100 Gallon (2 outlets) online at a best price in Qatar. water tanks. 300+ bought in past month. 5–6. 100+ bought in past month. Since you are filling a 1200 gallon storage tank, all you need to do is make sprinkler type spray nozzles to fill the storage tank from the well pump. The volume of aeration tank is calculated for the selected value of q c by assuming a suitable value of MLSS concentration, X. 5 kW. 2 m hose. It is not a booster pump and cannot withstand pressure;. the first LNG ship of capacity over 200 and 266,000 cubic meters were being constructed in Qatar.