Heat exchanger capable of cooling coolant of external plant and sewage treatment device comprising same

A sewage treatment plant for cooling a coolant that radiates heat from each component within a data center by using cooling water, the sewage treatment plant comprising:

• a plurality of biological reactors each configured to remove organic matters and nitrogen within sewage introduced therein by using microbes, to have disposed therein a cooling pipe into which the coolant that has radiated heat from each component within the data center flows, and to lower a temperature of the coolant that flows into the cooling pipe by inducing an exchange of heat between the cooling water and the coolant that flows into the cooling pipe;
• a sensor configured to sense a water temperature of the coolant that flows into the cooling pipe or a water temperature of the cooling water;
• a valve configured to control a flow of the coolant that flows into the cooling pipe within each biological reactor;
• and
• a controller configured to control an operation of the valve based on a sensing value of the sensor.

A sewage treatment plant for cooling a coolant that radiates heat from each component within a data center by using treated wastewater as a cooling water, the sewage treatment plant comprising:

• a plurality of sewage treatment apparatuses each configured to remove organic matters and contaminants within sewage introduced therein by using a filter medium, to have disposed therein a cooling pipe into which the coolant that has radiated heat from each component within the data center flows, and to lower a temperature of the coolant that flows into the cooling pipe by inducing an exchange of heat between the cooling water and the coolant that flows into the cooling pipe;
• a sensor configured to sense a water temperature of the coolant that flows into the cooling pipe or a water temperature of the cooling water;
• a valve configured to control a flow of the coolant that flows into the cooling pipe within each biological reactor;
• and
• a controller configured to control an operation of the valve based on a sensing value of the sensor.