Earthwise Navigation

8742

Activated Sludge: Non-filamentous Settleability Problems and Loss of Solids (SWBT Live-Online

4.0

Wastewater

Pennsylvania Rural Water Association

Joel Jordan

jjordan@prwa.com

8143539302 Ext. 201

Partner Website

Live online. Reviews commonly occurring operational conditions associated with poor settling of solids and loss of solids in secondary clarifiers and sequencing batch reactors that are not due to the undesired growth of filamentous organisms. Many of the conditions such as a nutrient deficiency are easily recognized, while some of the conditions such as floating sludge are not as easily recognized. The class presents several operational conditions, and reviews each condition with respect to the following: 1) a description of the condition, 2) the operational factors that promote the condition and most importantly 3) corrective measures to control and prevent the condition. Before each condition is reviewed, a presentation of the quantitative and often overlooked qualitative values of the 30-minute Settleability test and rise times after the test is offered. Operational conditions that are reviewed include: 1) clumping or denitrification in the secondary clarifier, 2) nutrient deficiency, 3) floating sludge, 4) slug discharge of soluble cBOD, 5) dispersion, 6) low dissolved oxygen concentration in the aeration tank, 7) high total dissolved solids (TDS), 8) shearing action and 9) toxic shock. In addition the impact upon the activated sludge process by critical temperature values and foam is presented.

Intermediate thru Advanced

Operational Conditions-Settleability Clumping EPS/Nutrient Defieciency Slime Bulking Floating Sludge Slug Discharge of soluble cBOD Deflocculation Dispersion Low Dissolved Oxygen High TDS Shearing Action Toxic Shock Critical Temp Values Foam Quizzes and Polls

Wastewater Treatment Operators

Virtual Synchronous