C&EE 255B

Biological Processes for Water and Wastewater Treatment

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

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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.

Checking the Schedule of Classes…

Requisites

Official UCLA wording
Requisites: courses 254A, 255A.

BruinTree reads · Prerequisite

confidence 1.00 · from text

all of

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
  - CHEM 14AGeneral Chemistry for Life Scientists I2 more beneath
  - MATH 31ADifferential and Integral Calculusanother path to it
  - CHEM 14AEGeneral Chemistry for Life Scientists I—Enhanced2 more beneath

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.