Membrane process drinking water treatment system and method

Abstract

The invention discloses a membrane process drinking water treatment system and method. The system comprises a primary settling tank, a self-cleaning filter device, an immersed ultrafiltration device and an ultralow pressure reverse osmosis device connected successively, wherein the primary settling tank is provided with a water inlet for introducing incoming water, and the ultralow pressure reverse osmosis device is provided with a water outlet for discharging produced water. The treatment system forms two-stage membrane treatment, can realize a novel membrane treatment process on the incomingwater by the two-stage membranes, and ensures that the effluent quality reaches the water quality standard of domestic drinking water stably. Ultrafiltration and reverse osmosis are in low pressure operating modes. Compared with a conventional membrane treatment process, the system has the advantages that the operating energy consumption is reduced greatly.

Description

technical field [0001] The invention relates to the field of drinking water treatment, in particular to a membrane drinking water treatment system and method. Background technique [0002] According to the data released by the World Bank in 2016, China's total water resources are 2,818 billion cubic meters, which is second only to Brazil, Russia, Canada, and the United States, and ranks fifth among 214 countries and regions; but the per capita water The resource is only 2062 cubic meters, which is one-third of the world average and ranks 106th in the world. The scarcity of water resources per capita is the basic national condition of our country. [0003] According to statistics, the current national surface water bodies account for 31%, 30%, 21%, 6%, 9% and 3% of the water quality of Class I, Class II, Class III, Class IV, Class V and inferior to Class V, respectively. Nearly 40% of water bodies have water quality of Grade IV or below, and water pollution is a serious pro...

AI Technical Summary

Problems solved by technology

However, with the introduction of the new version of "Drinking Water Hygienic Standards", the water quality indicators for drinking water have been increased from the original 35 to 106, and many of the indicators are difficult to meet the standards only through traditional water purification technology.

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