膜淨跟逆滲透有何不同？ How is mbranfiltra different from reverse osmosis?
原發表日期 Originally published：2020-01-01
逆滲透（RO）是把廢水濃縮，因此需要排掉一定比例的濃縮水；逆滲透可去除溶解性鹽類。中空纖維微過濾是讓水通過薄膜，以物理方式攔截大於額定孔徑的細菌與顆粒，不去除溶解性鹽類。兩種技術並不等同。
Reverse osmosis (RO) concentrates wastewater and must discharge a share of it; it removes dissolved salts. Hollow-fiber microfiltration lets water pass through a membrane that physically retains bacteria and particles larger than its rated pore size; it does not remove dissolved salts. The two technologies are not equivalent.
是否需要電力、水如何使用，依產品而定：拇指型隨身淨水器與濾水壺不需電力；家用濾水器接合格自來水，靠家戶水壓出水（工作壓力 15–45 psi，流量依水壓而異），初次使用或更換新濾心時需先放流 5 分鐘；工業與製程用的過濾系統，配置依製程需求討論。各產品的條件請見其規格。
Whether electricity is needed, and how the water is used, depends on the product: the thumb-sized portable filters and filter bottles need no electricity; the household filter runs on qualified tap water under household water pressure (working pressure 15–45 psi, flow varies with the pressure) and must be flushed for 5 minutes at first use or after a cartridge change; filtration systems for industrial processes are configured to the process requirements. See each product's specifications for its conditions.
原刊於舊版網站；內容已依現行條件更新。
First published on the previous website; the content has been updated to current conditions.
