Introduction: The Hidden Gold in Your Wastewater Every day, millions of liters of wastewater flow through sewage treatment plants (STPs) across India. For most property owners, industries, hospitals, and apartments, this wastewater is seen as nothing more than a compliance requirement-something to treat and dispose of. But what if this “waste” could become a powerful source of free energy ? What if your STP could generate cooking gas, reduce electricity bills, and save lakhs