Circulating water refers to water used in a production process that, after appropriate treatment, is reused in other systems or processes. A circulating water system refers to water used in a particular production process that, after appropriate treatment, is used in other production processes within or outside the same water system.

Product Detail

I.Main types of reused water

1‌‌. Industrial wastewater reuse water‌: Industrial wastewater is treated by an appropriate treatment system to reach a certain water quality standard and meet certain usage requirements, and can be reused in other systems.

‌2. Recycled water reuse‌: The domestic wastewater of community residents (such as bathing, washing, laundry, kitchen, toilet, etc.) is centrally treated and reused to a certain standard for community greening irrigation, vehicle washing, road washing, household toilet washing, etc.

‌3. Rainwater reuse‌: Rainwater is collected and used for urban sanitation, green space irrigation, landscape water, toilet flushing, etc.

II.Application scenarios of reused water system

·Urban sanitation‌: used for dust prevention and watering, street washing, etc.

‌·Green space irrigation: Supplement the water demand of urban green space.

‌·Landscape water: Used for water replenishment of parks, squares and other landscapes.

‌·Toilet flushing and car washing: Used for flushing toilets and car washing in public toilets.

III.Treatment process and standards of recycled water system

‌1. Physical indicators: Including turbidity, color, odor, conductivity, suspended solids, etc.

‌2. Chemical indicators: Including pH value, hardness, alkalinity, metal ions, chlorides, sulfides, detergents, etc.

‌3. Biochemical indicators: BOD5 (biochemical oxygen demand in five days), COD (chemical oxygen demand), ammonia nitrogen, total nitrogen, total phosphorus, etc.

4. Hygiene indicators: total bacteria count, Escherichia coli, residual chlorine, etc.

‌5. Water quality standards for irrigation reuse water‌: COD less than or equal to 10 mg/L, BOD5 less than or equal to 5 mg/L, TSS less than or equal to 2 mg/L, pH value between 6.5-8.5, total nitrogen less than or equal to 10 mg/L, total phosphorus less than or equal to 0.5 mg/L.

IV. Circulating Water and its Systems

Next : Set of water jugs