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Wastewater Treatment Processes and Water Reuse

Waste Water Treatment

  1. Kevin S. McLeary

Published Online: 15 JUL 2005

DOI: 10.1002/047147844X.ww321

Water Encyclopedia

Water Encyclopedia

How to Cite

McLeary, K. S. 2005. Wastewater Treatment Processes and Water Reuse. Water Encyclopedia. 1:814–819.

Author Information

  1. Pennsylvania Dept. of Environmental Protection, Harrisburg, Pennsylvania

Publication History

  1. Published Online: 15 JUL 2005


The selection of wastewater treatment processes depends on the influent characteristics, the quality of effluent required, and the cost. Treatment can be divided into these stages: preliminary, primary, secondary, and advanced treatment.

The objective of preliminary treatment is to prepare wastewater for further treatment by removing large objects and grit from the wastewater. These materials may otherwise impede the efficiency or increase the maintenance of downstream processes. Typical preliminary treatment may include screening, grit removal, comminution, and flow equalization.


  • wastewater;
  • treatment;
  • technology;
  • reuse;
  • applications;
  • effluent