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A sludge rich in destructive bacteria used to break down raw sewage.

Related Terms

RESERVE STABILITY NUMBER

Indicates the likelihood that this sediment will flocculate and form sludge. Abbr. RSN

SLUDGE

The oxidized and contaminated oil.

ENGINE DEPOSITS

Hard or persistent accumulation of sludge, varnish and carbonaceous residues due to blow-by of unburned and partially burned fuel, or the partial breakdown of the crankcase lubricant. Water from the condensation of combustion products, carbon, residues from fuel or lubricating oil additives, dust and metal particles also contribute.

BLOW-OFF VALVES

Valves that are opened to remove sludge and impurities from, or drain, a boiler or vessel.

AEROBIC-ANAEROBIC INTERFACE

That point in bacterial action in the body of a sewage sludge or compost heap where both aerobic and anaerobic microorganisms participate, and the decomposition of the material goes no further.

ACID RECOVERY PLANT

A facility for separating sludge acid into acid oil, tar, and weak sulfuric acid, with provision for later re-concentration.

BROWN ACID

Oil-soluble petroleum sulfonate found in sludge following sulfuric acid treatment of petroleum products.

CALYX

A steel tube that is a guide rod and is also used to catch cuttings from a drill rod. Also known as bucket; sludge barrel; sludge bucket.

DIGESTED SLUDGE

Sludge or thickened mixture of sewage solids with water that has been decomposed by anaerobic bacteria.

GROUT PIPE

1. A pipe that transports grout 257 gudgeon Guggenheim process Guggenheim process 2. A method of chemical precipitation which employs ferric chloride and aeration to prepare sludge for filtration.

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