Constructed wetlands for wastewater treatment

I. Wastewater

A. Types of treatment

B. Characteristics

C. Goals of biological treatment

D. Role of micro-organisms

Ii. Lagoons / stabilization ponds

A. Stabilization

B. Facultative ponds

C. Anaerobic ponds

Iii. Floating aquatic plant systems

A. Plants

B. Treatment mechanisms

C. Characteristics

Iv. Wetland systems

A. Free water surface (fws) systems

B. Subsurface flow (sf) systems

C. Comparison of functions of the two

D. Comparison of effectiveness