TABLE OF CONTENTS A measure of turbidity in water. It can be defined in two ways: (1) The turbidity resulting from 1 mg/l of fuller s earth suspended in water. (2) The depth of the column of water that just obscures the image of a burning standard candle viewed vertically through the sample.
A simple test to determine the correct chemical dose for a water or waste water, most commonly used for estimating the pH and coagulant requirement for a raw water. Various amounts and combinations of chemicals are added to several samples of water of the same volume, placed in jars and stirred slowly, typically for 30 minutes. The sample is allowed to settle and the quality of a supernatant is measured.
A method of coarse bubble aeration in an activated sludge aeration tank. The air is introduced at about a quarter of the depth of the aeration tank through perforated pipes. Each hole in the pipe has a nozzle or jet attached.
A type of vortex grit separator.
The use of high pressure water to wash away soil, as in tunnelling or open cast mining. It is also known as jetting.
An ejector Venturi scrubber.
A method for digging a water well in soft ground. A pipe is sunk into the ground while water...
