Water recycling is a key to the sustainable future. It indirectly conserves drinking water used for non-critical applications. Recycled water is effectively used for non-potable purposes, most commonly for agriculture, landscape, parks, industrial cooling and process water, toilet flushing, dust suppression, construction activities, concrete mixing and recharging of artificial lakes.
Wastewater recycling pays as it addresses two problems simultaneously:
ONE: Treatment for compliance and arresting the environmental pollution; and
TWO: utilization of same after purification for a lot many gainful applications saving freshwater costs.
Typical tests for recycled wastewater are those required for statutory compliance with a few additional ones to ensure enhanced quality for recycling purpose.
Ammonical nitrogen
Arsenic
Biochemical oxygen demand (BOD)
Boron
Cadmium
Chemical oxygen demand (COD)
Chlorides
Copper
Cyanide
Fluorides
Fluorides
Lead
Mercury
Nickel
Percent sodium
Pesticides
pH
Phenolic compounds
Selenium
Sulphates
Sulphides
Temperature
Total chromium
Total dissolved solids
Total kjeldahl nitrogen (TKN)
Total oil & grease
Total residual chlorine
Total suspended solids
Zinc