The purified water must meet stringent quality standards, including:

► Clear and transparent appearance with no observable particles, color, or odors.

► Free of toxins, heavy metal contaminants, and by-products from detoxification chemicals.

► Microbial and pathogen-free. 

► Total Dissolved Solids (TDS) between 50-300 mg/L.

► Hardness level between 25-200 mg/L.

Cost Considerations:

► Low-cost solutions are paramount to ensure accessibility and affordability for end-users.

Purification Technology Specifications:

► Microbial and Heavy Metal Removal - Proposals should detail the efficacy of the technology in eliminating microbes and trace amounts of heavy metals.

► Mineral Retention - The technology should retain essential minerals within the desired range. 

► Performance Comparison to RO - Technologies should match or exceed the performance of traditional reverse osmosis methods. 

► Exclusion of CDI and EDI - Solutions based on Capacitive Deionization (CDI) and Electrodeionization (EDI) technologies are excluded from consideration. 

► Low-Pressure Membrane - Proposals should feature membranes requiring low operating pressures. Technologies must offer simultaneous high water flow rates to ensure efficient purification. 

► COD Removal - Emphasis should be placed on high performance in Chemical Oxygen Demand (COD) removal.

► Self-Cleaning or Extended Lifetime Modules - Membrane modules should either possess self-cleaning capabilities or offer extended lifetimes exceeding 5 years.

Alternative Purification Technologies - Solutions beyond membrane-based technologies must demonstrate superior performance compared to RO or provide innovative approaches for water purification.

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