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Environmental Equipment Company Ltd ثادعم تكرش ةدودحملا تئيبلا Environmental Equipment Company LTD. P .O. BOX 30655 AL KHOBAR SAUDI ARABIA T: + 966 845 6931, 6933 | F: + 966 8945 6932 | W: etch2o.com | C. R. No 2051037486 1 Date: 18.03.2014 Proposal: Supply installation and commissioning of Reverse osmosis Plant Capacity: 300 m 3 /day. Client: Hassan Al Shaik ETCH2O COMMERCIAL QUOTE: 2013-AR-120(R1) COUNTRY SAUDI ARABIA EEC
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    Environmental Equipment Company Ltd   ث عم   تكرشدوحل ت يبل Environmental Equipment Company LTD. P .O. BOX 30655 AL KHOBAR SAUDI ARABIA T: + 966 845 6931, 6933 | F: + 966 8945 6932 | W: etch2o.com | C. R. No 2051037486   Date: 18.03.2014 Proposal: Supply installation and commissioning of  Reverse osmosis Plant Capacity: 300 m 3  /day.  Client:   Hassan Al Shaik ETCH2O COMMERCIAL QUOTE: 2013-AR-120(R1) COUNTRY SAUDI ARABIA   EEC HIGH-SPEED BIO TEC      Environmental Equipment Company Ltd   ث عم   تكرشدوحل ت يبل Environmental Equipment Company LTD. P .O. BOX 30655 AL KHOBAR SAUDI ARABIA T: + 966 845 6931, 6933 | F: + 966 8945 6932 | W: etch2o.com | C. R. No 2051037486   INTRODUCTION General Introduction  Government Agencies are always looking to find lower cost solutions to the problem of meeting higher water quality standards. Cost issues such as water and treatment plant design, operation cost, and manpower requirements all influence how the Government Agency will deal with water and wastewater treatment. This is a challenging time to find innovative low cost engineering solutions with little down side risk. ETCH2O has designed and produced a very successful range of High Speed Biotech Systems to help you provide simple low-cost solutions to meet the most stringent water and wastewater standards. WASTEWATER TREATMENT INNOVATION FROM EEC GLOBAL EEC was founded in 1982 with approximately 5,000 environmental protection systems installed with clients in more than 45 countries. ETCH2O would like to work with you to provide a Total Solution with a single system or a combination of systems to satisfy your specific need. ETCH2Ohigh quality bio systems are fully automatic, extremely reliable, and are selected by high end clients and military around the world.   Our Engineering staff, which includes Environmental, Mechanical, Civil, and Electrical Engineers, is able to provide a turnkey project on time and within the allocated budget. With the assistance of our certified technicians, our engineers ensure the project’s execution and performance will always meet or exceed the required quality standards. With a focus on customer needs and satisfaction as well as the realization of the importance of a continuously operating plant, our teams of customer service professionals ensure round the clock support to all our clients. Our customer service technicians are dedicated to restoring plant operation within 24 hours minimizing the plant downtime. According to our mott o “there is always room for improvement”, ETCH2O is dedicated to continuous product, and process development. Our training programs emphasize technical know-how, and continuous development, which are evident through our work. We look forward to hearing from you and please feel free to contact us if you have any questions.    Environmental Equipment Company Ltd   ث عم   تكرشدوحل ت يبل Environmental Equipment Company LTD. P .O. BOX 30655 AL KHOBAR SAUDI ARABIA T: + 966 845 6931, 6933 | F: + 966 8945 6932 | W: etch2o.com | C. R. No 2051037486   INTRODUCTION   TO REVERSE OSMOSIS: PROCESS DESCRIPTION The phenomenon of osmosis occurs when pure water flows from a dilute saline solution through a membrane into higher concentrated saline solution. The phenomenon of osmosis is illustrated in Figure below. A semi permeable membrane is placed between two compartments. “Semi permeable” means that the membrane is permeable to some species, and not permeable to others. Assume that this membrane is permeable to water, but not to salt. Then, place a salt solution in one compartment and pure water in the other compartment. The membrane will allow water to permeate through it to either side. But salt cannot pass through the membrane. As a fundamental rule of nature, this system will try to reach equilibrium. That is, it will try to reach the same concentration on both sides of the membrane. The only possible way to reach equilibrium is for water to pass from the pure water compartment to the salt-containing compartment, to dilute the salt solution. Figure also shows that osmosis can cause a rise in the height of the salt solution. This height will increase until the pressure of the column of water (salt solution) is so high that the force of this water column stops the water flow. The equilibrium point of this water column height in terms of water pressure against the membrane is called osmotic pressure. If a force is applied to this column of water, the direction of water flow through the membrane can be reversed. This is the basis of the term reverse osmosis. Note that this reversed flow produces pure water from the salt solution, since the membrane is not permeable to salt.    Environmental Equipment Company Ltd   ث عم   تكرشدوحل ت يبل Environmental Equipment Company LTD. P .O. BOX 30655 AL KHOBAR SAUDI ARABIA T: + 966 845 6931, 6933 | F: + 966 8945 6932 | W: etch2o.com | C. R. No 2051037486   Reverse Osmosis In Practice With a high pressure pump, pressurized saline feed water is continuously pumped to the module system. Within the module, consisting of a pressure vessel (housing) and a membrane element, the feed water will be split into a low saline product, called permeate and a high saline brine, called concentrate or reject. A flow regulating valve, called concentrate valve, controls the percentage of feed water that is going to the concentrate stream and the permeate which will be obtained from the feed. In the case of a spiral wound module consisting of a pressure vessel and several spiral wound elements, pressurized water flows into the vessel and through the channels between the spiral windings of the element. Up to seven elements can be connected together within a pressure vessel. The feed water becomes more and more concentrated and will enter the next element, and at last exits from the last element to the concentrate valve where the applied pressure will be released. Permeate of each element will be collected in the common permeate tube installed in the centre of each spiral wound element and flows to a permeate collecting pipe outside of the pressure vessel. The feed water shall be drawn by the booster pump from the client raw water tank by the filter feed pump and chlorinated before fed to pre-treatment filtration. Media filtration is included having Gravel and Sand. Filtration will be manually controlled for the operation and backwashing and the filter is expected to be washed once per day. Pressure gauges are provided to indicate when backwashing is required. The filtered water is De-Chlorinated with sodium meta bisulphite before feeding the membranes. After pre-treatment the water shall comply with guidelines for feeding permeators namely, the SDI (Silt Density Index) is less than 3. There shall be no chlorine present and the dissolved iron should be less than 0.03 mg/l. In addition to the above parameters, ETCH2O own specially developed ETCH2O solution sequestrant is added to prevent scaling by calcium sulphate. Furthermore, ETCH2O solution enables the plant to operate with an LSI (Langelier Saturation Index) in the brine stream of up to 1.0 instead of the conventional operation at a negative LSI. Since LSI is pH dependent, the use of ETCH2O solution reduces the acid consumption required to prevent calcium carbonate scaling. Chemical mixing is achieved in-line in the low-pressure section together with 5-micron cartridge filtration. The feed water is then boosted by high-pressure pump and is divided in the permeators into permeate and reject streams by reverse osmosis pressure. The reverse osmosis membranes are ion selective and allow almost pure water to permeate through to the product stream while salts are rejected and flow out into the brine stream. In the event
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