Water. Desalination + reuse
Issue link: https://fhpublishing.uberflip.com/i/86284
SHOWCASE TFC MEMBRANE FOR FO IN COMMERCIAL PRODUCTION A new highly durable, dimensionally stable, thin film composite (TFC) membrane is now in full-scale production by Hydration Technology Innovations LLC (HTI), the world's only manufacturer of commercially viable forward-osmosis (FO) membranes, Announcing the most recent addition to the OsMem™ FO membrane line, HTI said that this membrane produces spiral elements that have more than double the permeability and flux rate of its existing cellulose tri-acetate (CTA) FO membrane. The new TFC membrane is a high-permeability high- a single pressure vessel for almost 180 days," said Raúl Lemes de León, technical director for the EMALSA desalination facility in the Canary Islands. "To date, the performance of the Qfx membranes has been highly stable and producing almost 50% more water with lower total dissolved solids, at the same operating pressure, than other membranes currently installed in the skid. The membranes are delivering at their specified performance." rejection membrane that tolerates a 2.0-12.0 pH range and can also withstand the rigors of pressure-retarded osmosis (PRO) operating conditions. The flat sheet flux of production membranes averages 20 Lmh in FO mode and 49 Lmh in PRO mode at a test condition of 1 m NaCl as draw solute and deionized water as feed solution at 23°C and crossflow velocity of 30 cm/s. The product is also testing at a power rating of 3.5 W/m² for PRO at 10°C at 150 psi (10.34 bar). For comparison, HTI's CTA FO membrane has a flux of 9 Lmh. Salt rejection values for the new product also compare favourably for polyamide membranes at 99.3% minimum. NANOH2O ADDS TWO MORE RO MEMBRANES Two additions to the QuantumFlux™ line of reverse-osmosis membranes were launched by NanoH2O of California, USA, on 23 April 2012. LANXESS LAUNCHES TWO BRACKISH-WATER RO ELEMENTS Two reverse-osmosis (RO) elements based on polyamide thin- film composite membranes have been launched by German chemicals company Lanxess. The Leverkusen-based company, spun off from chemical giant Bayer in 2005, is promising to add other element types soon to its product range, which already includes ion-exchange resins. membrane separation elements is desalination of brackish water for industrial applications, including the production of boiler feedwater for power stations. Another is preparation of feedwater for electrodeionization (EDI) applications. High-performance RO membranes can provide a reduced load on the downstream EDI process improving cost performance. Membrane elements in the Lewabrane RO product family meet top quality standards and comply with all requirements for industrial use. With a standard length of 40 in (1,016 mm) and a diameter of 8 in, Lewabrane RO B400 HR has an active membrane surface area of 400 ft² (37.2 m²). Salt rejection is 99.7 % for a daily permeate flow rate of 37.9 m³ (average value under standard industry reference conditions; salt concentration in the feed: 2000 ppm, 225 psi, pH 7, 25°C, and a single element recovery of 15%). The Lewabrane RO B090 HF 4040 element has the same length but a diameter of only 4 in and an active membrane surface area of 90 ft² (8.7 m²). The element owes its superior average permeate flow rate of 2,500 gallons per day (9.4 m³/d) under standard conditions at a rejection level of 99.5 % to the greater active surface area of the RO membrane available inside the RO element. The main field of application for the Lewabrane RO NanoH2O's Qfx SW 400 R and SR membranes stabilized salt rejection and NSF Standard 61 Certification, enabling operators to meet stringent water quality standards, even under the most challenging water conditions. In pilot tests, says the company, the new QuantumFlux high- The Qfx SW 400 R and Qfx SW 400 SR both feature 99.85% rejection membrane elements produced exceptional permeate quality, surpassing competitive membranes with the same flux. "We have been pilot-testing a combination of the Qfx high rejection R and SR elements, in 365 ft² configurations, within | 36 | Desalination & Water Reuse | May-June 2012 DANFOSS LAUNCHES PUMPS AND ERD Danish pump manufacturer Danfoss has added a higher capacity high-pressure pump to its APP range for small and medium-sized reverse osmosis (RO) plants and also launched a higher-capacity version of its isobaric energy-recovery device (ERD) for RO, the iSave 40. The latest pump addition, APP 38, has a capacity of 38m3 and is thus the Danfoss APP pump with the largest capacity to date – despite sharing the same small footprint as the APP 21 - 30 pumps. The new APP 38 follows the successful introduction of the APP 16 – 22 pumps, unveiled by Danfoss at the International Desalination Association's World Congress in Australia in September 2011. The APP range extends from 0.6 m3 /h The new iSave 40 ERD shares all of the iSave 21's /h up to 38m3 /h.