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Definitions (1787)

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y connection


A saddle or Y (wye) connection to a lateral or branch sewer for connection of a building lateral. Also called a building service.
Source: owp.csus.edu

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y


An experimentally determined constant to estimate the unit growth rate of bacteria while degrading organic wastes.
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yield


The quantity of water (expressed as a rate of flow—GPM, GPH, GPD, cu m/day, ML/day, or total quantity per year) that can be collected for a given use from surface or groundwater sources. The yield m [..]
Source: owp.csus.edu

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zeolite


A type of ion exchange material used to soften water. Natural zeolites are siliceous compounds (made of silica) that remove calcium and magnesium from hard water and replace them with sodium. Syntheti [..]
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zeta potential


In coagulation and flocculation procedures, the difference in the electrical charge between the dense layer of ions surrounding the particle and the charge of the bulk of the suspended fluid surroundi [..]
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zone of aeration


The comparatively dry soil or rock located between the ground surface and the top of the water table.
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zone of saturation


The soil or rock located below the top of the groundwater table. By definition, the zone of saturation is saturated with water. Also see WATER TABLE. Where raw wastewater is exfiltrating from a sewer [..]
Source: owp.csus.edu

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zoogleal film


A complex population of organisms that form a slime growth on the trickling filter media and break down the organic matter in wastewater. These slimes consist of living organisms feeding on the wastes [..]
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zoogleal mass


Jelly-like masses of bacteria found in both the trickling filter and activated sludge processes. These masses may be formed for or function as the protection against predators and for storage of food [..]
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zoogleal mat


A complex population of organisms that form a slime growth on the sand filter media and break down the organic matter in wastewater. These slimes consist of living organisms feeding on the wastes in w [..]
Source: owp.csus.edu


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