biological treatment
61secondary treatment — The biological degradation of dissolved organic matter in the process of sewage treatment; the organic material is either mineralized or changed to settleable solids …
62tertiary treatment — (ter she er e) The removal from sewage of inorganic nutrients, heavy metals, viruses, etc., by chemical and biological means after microorganisms have degraded dissolved organic material during secondary sewage treatment …
63wastewater treatment — The use of physical and biological processes to remove particulate and dissolved material from sewage and to control pathogens …
64sewage treatment — A widespread biotechnological processes in developed economies. Methods vary widely, but all are designed for the biological break down of human and animal waste in order to allow safe discharge into the environment …
65environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
66Anaerobic digestion — and regenerative thermal oxidiser component of Lübeck mechanical biological treatment plant in Germany, 2007 …
67Living machines — are a form of biological wastewater treatment designed to mimic the cleansing functions of wetlands. They are intensive bioremediation systems that can also produce beneficial by products such as methane gas, edible and ornamental plants, and… …
68Water purification — This article is about large scale, municipal water purification. For portable/emergency water purification, see portable water purification. For industrial water purification, see deionized water. For distilled water, see distilled water. Water… …
69Hydrogen peroxide — IUPAC name …
70Solar energy — is the light and radiant heat from the Sun that powers Earth s climate and weather and sustains life. Since ancient times it has been harnessed for human use through a range of technologies. Solar radiation along with secondary solar resources… …
