C&EE 255B · CEE 255BBiological Processes for Water and Wastewater Treatment
Civil and Environmental Engineering · 4 units · Graduate courses (200-299)
Fundamentals of environmental engineering microbiology; kinetics of microbial growth and biological oxidation; applications for activated sludge, gas transfer, fixed-film processes, aerobic and anaerobic digestion, sludge disposal, and biological nutrient removal.
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.
Requisites
Official UCLA wording
Requisites: courses 254A, 255A.
Requires
Everything that has to come before this course, not just the courses named in the requisite above.
C&EE 255B
- C&EE 254AEnvironmental Aquatic Inorganic Chemistry
- CHEM 20BChemical Energetics and Change
- MATH 31ADifferential and Integral Calculus
- MATH 1Precalculus
- PHYSICS 1APhysics for Scientists and Engineers: Mechanics
- MATH 32ACalculus of Several Variables
- MATH 31BIntegration and Infinite Series
- PHYSICS 1BPhysics for Scientists and Engineers: Oscillations, Waves, Electric and Magnetic Fields
- MATH 32BCalculus of Several Variables
- C&EE 255APhysical and Chemical Processes for Water and Wastewater Treatment
- C&EE 155Unit Operations and Processes for Water and Wastewater Treatment
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 255B
- C&EE 261BAdvanced Biological Processes for Water and Wastewater Treatment
1 course lists this as a requisite. The whole downstream is here — 1 course over 1 level. Every course here opens its own tree.