Reclaimed water reuse in reclaimed water treatment system

Reclaimed water reuse has two purposes: one is to treat it to the level of drinking water, that is, to realize the direct recycling of water resources, which is suitable for areas with extremely scarce water resources, with high investment and complicated technology; Second, it is treated to the extent of non-drinking water, which is mainly used for water that is not in direct contact with the human body, such as building flushing toilets, greening and sprinkling water, and fire fighting. This is the way of reclaimed water treatment that we usually adopt. The selection of reclaimed water treatment process depends on the quantity, quality and use requirements of reclaimed water sources, which are generally divided into:

(1) The process flow of medium water treatment equipment with high-quality miscellaneous drainage as water source is as follows: raw water → grid → regulating tank → physical and chemical treatment → filter tank → disinfection → reclaimed water.

(2) The process flow of reclaimed water treatment with general miscellaneous drainage as water source is: raw water → grid → regulating tank → biological treatment → sedimentation tank → filtration tank → disinfection → reclaimed water.

(3) The process flow of reclaimed water treatment with domestic sewage as reclaimed water source is: raw water → grid → regulating tank → secondary biological treatment → sedimentation tank → filtration tank → disinfection → reclaimed water.

Reclaimed water recycling equipment can be applied to domestic sewage and some industrial sewage in living quarters, supermarkets, building communities, hotels, sanatoriums, hotels and comprehensive buildings. The treated reclaimed water can be used for flushing toilets, automobiles, road greening, watering green spaces and supplementing boiler water, and for hotels, hotels, office buildings, institutions, colleges, factories and mines, enterprises, finance, telecommunications, electric power, postal services, coal, metallurgy, chemical industry, textile, printing and dyeing, brewing, pharmacy, starch, beer, food, paper making and other industries.