Conference Papers | 2008 Conference Papers

MEASURING COLOUR IN TRADE WASTE

Yolanda Sztarr, Technical Consultant, Hatlar Group

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ABSTRACT

Colour is emerging as a critical quality parameter of trade waste which needs to be managed by Water Authorities,
but is currently not well understood. Colour can present aesthetic or technical barriers to water reuse, interfere
with treatment processes, and contribute to the appearance of plumes when outfall effluent discharges mix into
receiving water bodies.

This paper provides a discussion on how colour is defined, how it can be measured, and what colour is deemed
acceptable for potable water supply, recycled water supply, and trade waste discharges. Common laboratory tests
for colour discussed in this paper are Apparent Colour, True Colour, Adams-Nickerson Colour, ADMI Colour, and
Biodegradable Colour.

KEYWORDS

Trade Waste –Colour – True - Apparent – Adams-Nickerson – ADMI - Biodegradable Colour