Spreadsheets for MBBR Process Design Calculations

by Harlan H. Bengtson

This second edition includes description and examples of calculation of the nitrification surface area loading rate (SALR) based on user input values for the design DO concentration in the reactor and a target value for the effluent ammonia concentration. It also includes description of the procedure for correcting the design nitrification SALR value for a design temperature other than 15 degrees C. There is background description of MBBR (moving bed biofilm reactor) wastewater treatment process as an attached growth process using plastic carriers on which the biofilm grows. Flow diagrams are shown for BOD removal and for nitrification, including single stage and two stage processes. Discussion of process design calculations, including the surface area loading rate (SALR) and its use to calculate the carrier surface area needed and the MBBR tank volume needed. Example process design calculations are included for a single stage BOD removal MBBR process, a two stage BOD removal MBBR process, a two stage MBBR process for BOD removal and nitrification and for a single stage nitrification MBBR process.There is also description of a procedure and equations for estimating the removal rate and resulting effluent concentration for BOD removal and denitrification MBBR reactors. Each of the example calculations includes a screenshot of a spreadsheet for carrying out the MBBR process design calculation for that example.

39 pages, Paperback

Published January 17, 2017