TABLE OF CONTENTS A type of backwash biological aerated filter that uses upward flow. The sunken media are in three different sizes and layers so that coarse to fine filtration is achieved.
Biological activated carbon.
Diatoms.
Shigellosis.
A rod-shaped bacterium, but see below.
A genus of bacteria that are facultative anaerobes, common in trickling filters, activated sludge and sludge digestion. They form endospores. See also below.
The bacterium that causes anthrax.
An old name for coliform group.
A local discharge of current in an electrostatic precipitator caused by the layer of fly ash.
A connection from a branch drain or sewer to a much deeper sewer. The wastewater from the branch enters the manhole through a vertical pipe which may be inside or outside it but in any case has access eyes built in for rodding ( see Figure B.1). Back drops prevent excessive scour and splashing in the manhole.
The chimney end of a boiler or furnace.
Material used to fill a hole made during construction, e.g. such as filling a trench after the installation of a sewer or a water pipeline. The backfill material is likely to be some of the material used to excavate the trench.
The...
