Wastewater treatment apparatus and method with stair-like heat treatment tanks

A wastewater treatment method with stair-like heat treatment tanks for performing a breakdown process, comprising the step of:

• respectively using a first pump and a second pump to transport a wastewater containing organic compounds and a reaction agent in a reaction tank by a specific proportion to a mixing tank where they are mixed into a mixed solution;
• using a third pump to transport the mixed solution from the mixing tank to a heat exchanger for performing a heat exchanging process upon the mixed solution so as to heat the mixed solution for outputting;
• transporting the heated mixed solution from the heat exchanger to a stair-like heat treatment tank where the mixed solution is circulating therein while being heated for a period of time so as to perform an organic destruction process upon the mixed solution and thus cause a discharging liquid to be formed;
• feeding the discharging liquid back to the heat exchanger for causing the temperature of the discharging liquid to drop before it is being transported to a condensation tank for further cooling down the discharging liquid;
• using the fourth pump to transport the discharging liquid to a water purifier after the temperature of the discharging liquid is cooled to a specific temperature where the discharging liquid is purified and separated into a cleaned water and a concentrated liquid for outputting;
• and
• using a fifth pump to transport the concentrated liquid to a agent recycling unit where it is electrolyzed so as to recycle and transport the resulting reaction agent to the reaction agent tank by the use of a sixth pump, while the cleaned water is being discharged or recycled.