Dissolved Oxygen, Sewage, Pollutants, Animal Sewage, Human Sewage, Organic,Weight-Based Measure,Organic or Chemical Wastes

Dissolved Oxygen

Dissolved Oxygen
A knowledge about dissolved oxygen in the sewage is essential from the point of view of aquatic life. Oxygen in water is available to the plants and animals that live there only if it dissolved. oxygen or DO can range in concentration from 0 to 14.6 parts per million in water. This is also equivalent to a weight-based measure, milligrams per litre (or mg/1). The amount of oxygen that can be dissolved in water is inversely related to temperature, i.e. as the water temperature gets higher, the amount of oxygen that can be dissolved in the water goes down.

It is also possible under some circumstances to have oxygen levels above 14.6 mg/1. This can happen where water goes over a dam or other structures that causes unusual amounts of mixing. The more oxygen that is in the water, the more diversity can be expected in the plants and animals found in the water. Pollutants that make DO go down (besides heat) are organic wastes such as animal or human sewage or any chemicals that will be decomposed by bacteria in the water. The growing bacteria that break down either the organic or chemical wastes consume oxygen for their reproduction an thus deplete oxygen in the water.

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Dissolved Oxygen