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  3. Single Method 56I701220-2 - Turbidity (Turbidity Tube)

Lovibond Single Method 56I701220-2 - Turbidity (Turbidity Tube) User manual

  • Hello! I have reviewed the product detail document for the Lovibond Turbidity Tubes, including models 56I701220-2, 56A607101 and 56A010801. This document outlines the use of these tubes for measuring turbidity, provides calculation for the Probable BOD value, and includes the Royal Commission Standards for Effluents. I am ready to answer any questions you have regarding this product.
  • What is the relationship between turbidity and BOD value?
    What is the Royal Commission Standard for Effluents related to BOD?
    How should I clean the turbidity tube?
Turbidity (Turbidity Tube) / 56I701220-2
ENMethod Reference Book1.02
Turbidity (Turbidity Tube) 56I701220-2
The following accessories are required.
Accessories Packaging Unit Part Number
Turbidity tube (one piece) - 30-400 NTU 1 pc. 56A607101
Turbidity tube (two piece) - 5-500 JTU (NTU) 1 pc. 56A010801
Application List
• Cooling Water
• Disinfection Control
Notes
1. There is generally a close relationship between turbidity and the BOD value ofsettled
sewage and effluent. The Probable BOD value is obtained by dividingthe Turbidity
reading by 2. Add “5” to this result to obtain the readingaccording to the following
formula:
Probable BOD = Turbidity/2 + 5
This value may be used as a cross-check on the BOD value obtained from the rela-
tionship with the Permanganate Value test.
2. The Royal Commission Standard for Effluents recommends a BOD value ofnot more
than 20mg/L.
3. Royal Commission Standards for Effluent:
Suspended Solids - not more than 30 mg/L
BOD value - not more than 20 mg/L
4. A check should be maintained on the temperature of effluent discharges andthese
should always be close to ambient temperatures. A check is particularly important on
industrial effluents where heated processes are involved.
5. The tube should be rinsed after use.Periodically, any staining may be removed
by the use of an ordinary domestic detergent taking care not to scratch the plastic
surface.
Turbidity (Turbidity Tube) / 56I701220-2
ENMethod Reference Book1.0 3
Turbidity (Turbidity Tube) / 56I701220-2
ENMethod Reference Book1.04
Determination of Turbidity with turbidity tube
Hold the test tube vertically
over a white surface and
view downwards on the
bottom mark.
Slowly fill in sample until
the circle on the base just
disappears.
Read off the graduation corresponding to the height of the sample in the tube. This
represents the turbidity of the effluent in Jackson Turbidity Units (JTU).
For sewage effluents this value is approximately equivalent to the Suspended Solids
Content as milligrams per litre.
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