Wastewater treatment is usually characterized as consisting of four sequential processes: preliminary, primary, secondary and tertiary treatment. This course will introduce you to processes and equipment for secondary treatment of wastewater. You will be introduced to descriptions, functions and design considerations for trickling filter plants, activated sludge plants, and wastewater treatment ponds. You will be introduced to special considerations for wastewater treatment plants in hot and cold climates. You will learn how the secondary treatment processes work together with the preliminary, primary, tertiary and sludge handling processes to form a complete wastewater treatment plant.

This publication will introduce you to processes and equipment for handling, treating and disposing of sludge produced by wastewater treatment plants. You will learn about sludge pumping, thickening, conditioning, dewatering, digestion, storage and final disposition. You will learn about loading parameters for gravity thickeners and operational parameters for air flotation thickeners. You will learn guidelines for chemical conditioning of sludges; and advantages, disadvantages and shortcomings of filter presses, basket centrifuges, and solid bowl decanter centrifuges. You will learn about design parameters for aerobic and standard and high-rate anaerobic sludge digesters.

Dinero the Frog Learns to Save Energy is a fun and educational book about energy conservation. Poppi the Frog teaches Dinero about energy, where it comes from, how it is used, and what we can do to conserve energy and reduce pollution. Aligns with National Education Science Standards (NSES).