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Home > Title 30 > Part 1 > Chapter 217 >Subchapter G > Rule 217.186
TITLE 30 - ENVIRONMENTAL QUALITY
PART 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY
CHAPTER 217 - DESIGN CRITERIA FOR DOMESTIC WASTEWATER SYSTEMS
SUBCHAPTER G - FIXED FILM AND FILTRATION UNITS
SECTION/RULE §217.186 - Nitrifying Rotating Biological Contactors
Chapter Review Date 08/01/2024

(a) A rotating biological contactor (RBC) system designed for five-day biochemical oxygen demand (BOD5 ) removal and nitrification of domestic wastewater in a single system must include four stages and have a maximum overall organic loading rate of 1.6 pounds of BOD5 per day per 1,000 square feet of media.(b) A nitrifying RBC must be designed to allow chemical addition if the influent pH is below 7.0 standard units.(c) The engineering report must justify the nitrification rate of a system using calculations.(d) A nitrifying RBC system may be subject to the requirements of §217.7(b)(2) of this title (relating to Types of Plans and Specifications Approvals).

Source Note: The provisions of this §217.186 adopted to be effective August 28, 2008, 33 TexReg 6843; amended to be effective December 4, 2015, 40 TexReg 8254.

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