The last in BMS series explaining terms/jargon/terminology used in the area of sewage or wastewater treatment finishes with terms from S-W; Sludge, STP, Surface Water, Suspended Solids, Tertiary Treatment, UV Disinfection, Wastewater, Wastewater Treatment Plant/System & Whole Life Cost.  We will publish the whole list from A-Z next week.  Links to Parts 1-6 are available at the bottom of the blog.  If there are any terms you would like explained that we have not covered please contact us and we can add to the list!

48. SLUDGE: A mixture of solids and water produced by the settlement and treatment of SEWAGE.


50. SURFACE WATER: Rainwater runoff from sealed surfaces e.g. roads & car parks.

51. SUSPENDED SOLIDS (SS): A measurement of the solids in suspension in SEWAGE, INFLUENTS AND EFFLUENTS normally expressed in mg/l or parts per million (ppm).

52. TERTIARY TREATMENT: Term normally applied to further treatment following AEROBIC Treatment and Settlement, to achieve an enhanced quality FINAL EFFLUENT e.g. The BMS M10/M20 SAND FILTERS.

53. UV DISINFECTION: A TERTIARY TREATMENT method employing Ultra Violet (UV) light from UV emitting light bulbs to kill microorganisms in treated EFFLUENT.  It can be used to disinfect effluent which can then be reused as a process water, for non-potable purposes such as toilet flushing and for irrigation e.g. BMS BLIVET UV; PACKAGE SEWAGE TREATMENT including UV DISINFECTION.

54. WASTEWATER: It is often used interchangeably with SEWAGE.


56. WHOLE LIFE COST:  The full cost of a SEWAGE Treatment plant over its 20 + year operation, including purchase price, installation, maintenance, electricity & spare parts cost.  The BMS Blivet offers a class leading Whole Life Cost AKA; LIFETIME COST.

More detailed explanations of parameters used to measure final effluent quality can be found by clicking on the links e.g. BODSSNH4NCOD & P.

Links to Parts 1-7 of the Blog

Sewage Treatment Terminology Explained A-Z Part 1;Aerotor to Anoxic

Sewage Treatment Terminology Explained A-Z Part 2;Balance Tank to BOD

Sewage Treatment Terminology Explained A-Z Part 3; C to E; Clarifier to Eutrophication

Sewage Treatment Terminology Explained A-Z Part 4; F to K; Ferric Sulphate to Kjeldahl Nitrogen

Sewage Treatment Terminology Explained A-Z Part 5; Nitrate to Primary Settlement Tank

Sewage Treatment Terminology Explained A-Z Part 6; Raw Sewage to Sewage Treatment Plant/System

If you have any questions of would like information on package wastewater treatment products, please do not hesitate to contact me.


Tommy butler BMS

A bit about the company:

Butler Manufacturing Services is a family owned specialist manufacturer of package (all in one) products for sewage treatment and surface water treatment established in 1986 with exports to 38+ countries worldwide including the world leading Blivet package sewage treatment plant, a ‘one stop shop’ for all surface water products from design to installation including attenuationinterceptorsholding tanks (incl. chemical resistant)hydrobrakes, rainwater harvesting tanks/filters & vortex silt separatorschlorine contact tanksfully fitted pumps and sumps and much more.

If there is a requirement for any of above on any project that you are working on we would welcome the opportunity to work on a solution with you.

© Butler Manufacturing Services 2013.