Flocculation Test Apparatus
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A bench-mounted framework incorporates facilities for six tests to be carried out simultaneously. The glass flocculating vessels stand on a translucent base which is illuminated from below. Each flocculating vessel incorporates a stirrer paddle driven by a variable speed drive. The paddle assemblies are easily withdrawn for removal and cleaning of the test vessels.
The tests serve to indicate the optimum chemical dosages for removal of turbidity and color, including such parameters as pH adjustment, and the supplemental use of activated carbon. Jar tests, furthermore, yield a wealth of qualitative information on the rate of agglomeration as a function of energy input (paddle speed), the settle ability of the floc formed, the clarity of the supernatant water (which might be related to the subsequent length of filter run).
Analysis of a water or waste preparatory to the design of a treatment sequence often involves coagulation and flocculation tests, 'Jar tests', in the laboratory.
Jar tests are routinely used for the control of plan operations and are performed by treatment plant operators.
Coagulation and flocculation tests may be used, in conjunction with other tests, to study basic processes including, for example, the kinetics of reaction and the removal of trace constituents from aqueous solution.
A digital timer can be set to count down from 1 to 99 minutes. After count down the paddles stop and an alert sounds.
The paddle shafts are made of stainless steel to resist corrosion. Paddle speed is accurately maintained by electronic feedback control. A digital display clearly indicates the speed which is fully variable. Alternatively, the use of two adjustable presets allows repetition of pre-selected speeds.
A bench top unit comprising an internally illuminated base and a backboard supporting a control console.
Stirrer assemblies are easily demounted to allow the test vessels to be removed and cleaned.
Stirrer speed range typically 25-240 rpm.
Digital timer 1-99 minutes.
Two adjustable pre-set programs.
Six stirrers with stainless steel paddle shafts and blades linked to a variable speed motor.
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