• In the present era, it is utmost important to save water and reuse wastewater to overcome the water scarcity.
• Owing to limited access to freshwater resources, desalination is widely practiced as an alternate source of portable water.
• There have been discussed a few non-patent and patent literatures regarding desalination techniques for wastewater treatment.
• The prior arts techniques required huge cost and need external power as input for proper desalination and tedious process to remove metal contaminated wastewater.
• The prior art literatures has failed to disclose the solution as described in the present invention which address above issues efficiently.

Present Patent describes a fuel cell, and electrochemical method using redox species for simultaneous wastewater treatment and desalination.

Further, said patent does not require any external energy to be supplied as input. It talks about an electrochemical fuel cell comprising plurality of chambers:

1. 1st chamber filled with nitrogenous waste wherein anode is submerged in the nitrogenous waste; (Anode is nickel foam), wherein 1st chamber responsible for organic electrooxidation and electric production.
2. 2nd chamber filled with brine, & the 3rd chamber (cathode chamber) filled with Cr(VI). Cathode chamber for Cr(VI) reduction; & middle chamber for desalination (cathode is catalyst free carbon brush).
3. Cow Urine/urea is chosen as anolyte which leads to organic oxidation at anode & inorganic reduction in terms of Cr(VI) reduction at cathode, which further leads to the redox reaction simultaneously.

The process leads to the nitrogenous waste (urea/cow urine) oxidation and reduction of Cr (VI) along with desalination in a redox cell.