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Actual vs. Wahlberg-Predicted RAS TSS

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July 16, 2020

This post contains two sections with Section 1 covering Wastewater Solids production and Section 2 describing Influent Wastewater Characteristics.

Section 1: Wastewater Solids

It can be helpful to quickly estimate solids production in wastewater. Certainly, each wastewater treatment plant and its collection system, with variable ratios...

September 10, 2019

Introduction

In this post I'm going to discuss how you can estimate the solids concentration in the return activated sludge (RAS) using the treatment plant influent flow rate, the RAS flow rate, and the mixed liquor suspended solids (MLSS) concentration. This approach is new for me, having read about it in a great, new textbook from Er...

State Point Analysis

With just six data inputs, state point analysis (SPA) would seem to provide a simple mathematical model for evaluating clarifier performance. But in fact, the graphical output of SPA does require careful review and interpretation.

Before going through the specifics of SPA I’d like to quote from an excellent textbook...

October 24, 2016

Primary and Secondary Clarifiers

This page provides information on the expected performance of primary and secondary clarifiers. Removal efficiencies, detention times, and other parameters have been summarized to provide a handy reference. Of course, every wastewater plant is different, with potentially vast differences between municip...

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