The Dictionary of Environmental Science and Engineering, Second Edition
NATURAL WASTEWATER TREATMENT SYSTEMS
These are divided into two major types: terrestrial and aquatic. The terrestrial (land application) are slow-rate irrigation, rapid-infiltrationpercolation and overland flow. The aquatic are pond systems, anaerobic ponds and facultative ponds. Both types depend on physical and chemical responses and unique biological components, see Constructed wetlands
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