What is the difference between sewer , sewage , sewerage ?

Dear student, Sewage is the wastewater containing solid and liquid wastes and pollutants .It is produced by humans from homes, industries, hospitals, offices and other places that use water for their various processes. The pipe carry away the wastewater from house to the line of sewer. These pipes are known as sewer pipes. They form a network over a small area which is termed as sewer. These pipes merge into larger pipes where the sewage of larger area is collected and is termed as sewerage. Regards