C&EE 255A

Physical and Chemical Processes for Water and Wastewater Treatment

Civil and Environmental Engineering · 4 units · Graduate courses (200-299)

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Review of momentum and mass transfer, chemical reaction engineering, coagulation and flocculation, granular filtrations, sedimentation, carbon adsorption, gas transfer, disinfection, oxidation, and membrane processes.

Letter grading.

When it runs

Winter 2026
Winter 2027

Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.

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Requisites

Official UCLA wording
Requisites: courses 155, 254A.

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Requires

Everything that has to come before this course, not just the courses named in the requisite above.

C&EE 255A

C&EE 155Unit Operations and Processes for Water and Wastewater Treatment
- C&EE 153Introduction to Environmental Engineering Science
  - C&EE 107Environmental Fluid Mechanics1 more beneath
  - MECH&AE 103Elementary Fluid Mechanics1 more beneath
C&EE 254AEnvironmental Aquatic Inorganic Chemistry
- CHEM 20B

2 direct requisites. Showing 25 courses over 3 levels; the branches marked with a count carry on past it. Every course here opens its own tree.

Unlocks

What this course is a requisite for, and what those courses lead to in turn.

C&EE 255A

C&EE 255BBiological Processes for Water and Wastewater Treatment
- C&EE 261BAdvanced Biological Processes for Water and Wastewater Treatment
C&EE 261Colloidal Phenomena in Aquatic Systems
C&EE 261AAdvanced Water Treatment Processes

3 courses list this as a requisite. The whole downstream is here — 4 courses over 2 levels. Every course here opens its own tree.