Primary Treatment at Wastewater Treatment Plants
Primary Treatment at Wastewater Treatment Plants is a volume in the Operator's Guide Series and focuses on that segment of conventional wastewater treatment known as primary treatment. The author has developed the general operational procedures described in the book from his own experience as a plant operator, superintendent, and operations consultant. These procedures should reinforce your understanding of the standard operations at your plant and may even spark new ideas that could prove beneficial to overall operations. For this reason, blank pages are provided at the end of each chapter so that notes and ideas can easily be added to this handy volume.
Topics addressed in the book include a discussion of the primary treatment process, equipment, start-up and shutdown procedures, routine operator duties, emergency response procedures, general safety rules, and good housekeeping and odor control tips. The book also contains a section featuring a variety of troubleshooting hints designed to help you run a smooth operation. These techniques will prove useful in identifying problems, and the procedures discussed will help you get the operation up and running again.
Table of Contents
USER'S GUIDE. PROCESS OVERVIEW. PRIMARY DESCRIPTION. PRIMARY TREATMENT CONCEPTS. Surface Loading Rate or Surface Overflow Rate. Weir Overflow Rate. Detention Time. Solids Loading Rate. Removal Efficiency. PROCESS DESCRIPTION. FACTORS INFLUENCING PERFORMANCE. Detention Time. Temperature. Wastewater Characteristics. Influent Flow Rates. Unit Characteristics. PROCESS CONTROL STRATEGIES. Flow Control. Sludge Collection. Skimmings/Scum Collection. Sludge Removal. Process Control Tests. General Guidelines. TYPES OF PRIMARY SETTLING TANKS. TYPICAL DESIGN SPECIFICATIONS. Construction. Detention Time. Surface Loading Rates. Weir Overflow Rates. Common Design Problems. EFFICIENCY INTERACTIONS. Upstream Processes. Downstream Processes. COMPONENT DESCRIPTION. RECTANGULAR TANKS. CIRCULAR TANKS. SLUDGE/SCUM PUMPS. START-UP AND SHUTDOWN PROCEDURES. Primary Unit Start-up. Primary Unit Shutdown. ROUTINE OPERATOR DUTIES. OPERATION. SAMPLING REQUIREMENTS. MAINTENANCE. General Maintenance. Preventive Maintenance. Emergency Maintenance. Spare Parts Inventory. RECORDKEEPING. TROUBLESHOOTING. GENERAL TROUBLESHOOTING PROCEDURE. MECHANICAL TROUBLESHOOTING. PROCESS TROUBLESHOOTING. EMERGENCY RESPONSE PROCEDURES. POWER FAILURE. WINTER OPERATION. HIGH FLOWS. GENERAL SAFETY RULES. EQUIPMENT SAFETY. PERSONAL SAFETY. HOUSEKEEPING AND ODOR CONTROL. HOUSEKEEPING. ODOR CONTROL.