A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses.Lagoons are commonly divided into coastal lagoons (or barrier lagoons) and atoll lagoons.They have also been identified as occurring on mixed-sand and gravel coastlines. There is an overlap between bodies of water …

A rotating biological contactor or RBC is a biological fixed-film treatment process used in the secondary treatment of wastewater following primary treatment. The primary treatment process involves removal of grit, sand and coarse suspended material through a screening process, followed by settling of suspended solids.The RBC process allows the wastewater to come in …

The activated sludge process is a type of biological wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa.It uses air (or oxygen) and microorganisms to biologically oxidize organic pollutants, producing a waste sludge (or floc) containing the oxidized material.. The activated sludge …

Human waste (or human excreta) refers to the waste products of the human digestive system, menses, and human metabolism including urine and faeces.As part of a sanitation system that is in place, human waste is collected, transported, treated and disposed of or reused by one method or another, depending on the type of toilet being used, ability by the users to pay for …

Vernal pools, also called vernal ponds or ephemeral pools, are seasonal pools of water that provide habitat for distinctive plants and animals.They are considered to be a distinctive type of wetland usually devoid of fish, and thus allow the safe development of natal amphibian and insect species unable to withstand competition or predation by fish. . Certain tropical fish lineages …

A mill pond (or millpond) is a body of water used as a reservoir for a water-powered mill.. Description. Mill ponds were often created through the construction of a mill dam or weir (and mill stream) across a waterway.. In many places, the common proper name Mill Pond has remained even though the mill has long since gone.

pH，亦称 pH值、氢离子浓度指数、酸鹼值 、[离巠]（注音： ㄌㄧㄥˊ ；拼音：líng）標值 ，是溶液中氢离子 活度的一种标度，也就是通常意义上溶液酸 碱程度的衡量标准。 这个概念是1909年由丹麦 生物化学家 瑟倫·索倫森提出的。 「pH」中的「H」代表氫離子（H + ），而「p」的來源則有幾種說法。

An API oil–water separator is a device designed to separate gross amounts of oil and suspended solids from industrial wastewater produced at oil refineries, petrochemical plants, chemical plants, natural gas processing plants and other industrial oily water sources. The API separator is a gravity separation device designed by using Stokes Law to define the rise velocity of oil …

The coliform index is a rating of the purity of water based on a count of fecal bacteria.It is one of many tests done to assure sufficient water quality. Coliform bacteria are microorganisms that primarily originate in the intestines of warm-blooded animals. By testing for coliforms, especially the well known Escherichia coli (E. coli), which is a thermotolerant coliform, one can determine …

Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for discharge to the surrounding environment or an intended reuse application, thereby preventing water pollution from raw sewage discharges. Sewage contains wastewater …