Technical Name Device and method for recycling and reuse of reverse osmosis wastewater
Project Operator National Cheng Kung University
Project Host
Summary
The novel aM device (AC@SGO) is capable of removing extra, unwanted or toxic ions. Particularly it can replace the RO water purifier with even better performance. In addition, the aM device can also be used in industrial RO wastewater recycling with a minimum maintenance necessity. The aM device with the advantages of relatively low cost and multiple functions would have a high business competitiveness.
Scientific Breakthrough
本關鍵技術是以新穎類MCDI (analogous membrane “aM” capacitive deionization)方法,採用SGO (sulfonated graphene)包夾活性碳(AC)(AC@SGO)與AC電極分別為負極與正極,施加電壓(0.6~1.2 V)使水中正與負離子分別電吸附(electrosorption),達到分離不需要之離子(例如:飲用水中多餘之Mg2+、Ca2+或其他微量毒性金屬離子或帶電原子團(含:CN-、NH4+、AsO2-等)的目的,使原被排放之RO廢水,可循環再利用。電極電吸附達飽和後(約7日),可移除或施加逆向電壓於電極,使原吸附之離子釋出(反沖洗5次(淨水器體積約7 mL)),富集濃縮後,排出非常微量之污水(<0.1% ),{0.04%=7 mL×5/[(2 L/人日)×4人×7日]}。
以此概念,設計低成本、簡易施工之高效aM裝置,加裝於現存之RO淨水器中,除可將RO淨水器之RO廢水回收、淨化、及循環再利用;也可直接取代現有RO淨水器之RO淨水裝置。尤其,aM裝置具低維修頻率優勢,只透過自動化施放正/反電壓操作,進行再生與電吸附,不損耗關鍵AC@SGO電極材料。本高效率aM裝置及方法也可應用於工業用水去離子,製備低導電度水。由於RO薄膜之成本較高,本裝置成本低廉且可以循環使用,預期在工業及家庭之應用與需求,將具高競爭力與取代性。
Industrial Applicability
The low-cost, high-efficiency, minimum maintenance and easy-to-setup aM device can perform electrosorption and regeneration automatically for RO wastewater recycling or substitute the existing RO water purifier for drinking water. The aM device can also be applied in deionization of industrial wastewater for low conductivity water, and thus has a high market competitiveness.
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