Course Catalogue.

After participating in this course, you will be able to:

• Recognize the application and operation principles of lagoons
• Understand the physical, chemical, and biological processes that influence the operation and efficiency of lagoons
• Assess design considerations for lagoons
• Develop practical solutions to common problems encountered during the operation of lagoons

Description
Lagoons are used as a stand-alone technology for treating effluents originating from domestic, industrial or agricultural activities. The successful operation of lagoons relies on proper design, sound operation, and maintenance practices. This course discusses the physical, chemical, and biological processes that govern wastewater treatment in lagoons and addresses the design principles and operation and maintenance practices of lagoons for increased efficiency of treatment, as well as the methods that help in upgrading lagoon effluents.

You will also learn how lagoons can be used as polishing steps for removing nutrients such as phosphorus.

Who Should Attend
Plant Managers • Plant Operating Personnel • Environmental Engineers in Private Sector Development Projects • Engineers in Manufacturing Plants and Processing Plants • Municipal Engineers • Municipal Planners • Biologists • Chemists • Environmental Scientists • Geologists • Regulatory Personnel • Compliance Officers • Consulting Engineers

Course Syllabus

Applications, Benefits and Limitations of Lagoons

• Treatment of wastewater and removal of organic and inorganic contaminants
• Comparison of lagoons with conventional wastewater treatment plants
• Cost, energy and maintenance aspects of lagoons

Processes and Controlling Factors in Wastewater Treatment Lagoons

• Physical, chemical and biological treatment processes in lagoons
• Physical, chemical and biological controlling factors
• Role of algae in oxygen generation and pH changes
• Removal processes for organic compounds, nitrogen and phosphorus
• Lagoons design and operating parameters

Lagoons Types, Design and Construction

• Facultative lagoons
• Aerated lagoons
• Aerobic lagoons
• Anaerobic lagoons
• Aeration means in lagoons
• Degradation mechanisms in anaerobic lagoons
• Operation and construction considerations of lagoons

Monitoring Lagoons Performance

• Sampling types, locations and frequencies
• Measurement of lagoons parameters: flow rate, pH, dissolved oxygen, solids, BOD
• Lagoons maintenance aspects

Day 2

Desludging Lagoons

• Problems associated with sludge accumulation in lagoons
• Monitoring and management of sludge buildup
• Options for sludge removal, treatment and disposal
• Preventing sludge accumulation

Potential Causes and Recommended Solutions to the Reduced Lagoons Performance

• Algae growth and control
• Sludge accumulation
• Benthal feedback
• Changes in wastewater characteristics and/or environmental conditions
• Bacterial activity

Optimizing for Improved Quality of Lagoons Effluent

• Flow regulation
• Structural design changes
• Using biofilm/attached-growth systems
• Optimizing for ammonia and phosphorus removal
• Improving biological activity inside lagoons

Optimizing for Reduced Energy Consumption and Cost

• Energy consumption and operating costs components in lagoons
• Aeration means
• Attached growth biomass
• Cost reduction in mechanical aeration systems

Optimizing Design to Improve the Treatment Efficiency

• Pre-treatment to reduce lagoon loading and improve the treatment efficiency
• Post-treatment to improve the effluent quality
• Attached-growth systems: RBC, MBBR, SAGR
• Sand filtration systems
• Wetlands
• Effluent disinfection

Concluding Remarks: Lagoons Troubleshooting

Discussion Period: Questions and Answers