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Malvern Panalytical (Malvern, UK) and Concept Life Sciences (Cheshire, UK) have jointly launched Amplify Analytics - a new range of highly flexible services designed to help pharmaceutical companies rapidly identify those drug candidates that meet bioavailability and processability requirements, speeding and de-risking drug development.

Drinking water treatment plants are constantly challenged to manage coagulation chemicals as they strive for the precise dosage to enable a stable floc to form. The chemicals are critical to the filtration process, whether it is a convention floc/sed system or direct filtration, including membrane filtration. Chemicals are expensive and account for a considerable amount of a plant’s operating budget, so their oversight can significantly impact the efficiency, operational bottom line, and overall performance of the plant in response to its local demand. Please login or register to read more.

Products:
Zetasizer WT
Date:
June 18 2020
Language:
English

Products:
Insitec range
Date:
July 24 2020
Language:
English

Jar testing simulates the coagulation / flocculation process in a water treatment plant. In a set of beakers, a defined amount of raw plant water is mixed with varying amounts of coagulant. Each beaker receives an increasing incremental dose of coagulant and is then stirred for a set amount of time to mimic plant operation. The formation of floc during this test simulates plant operation. Observations from the floc formation indicate a preferred range of coagulant dosage. Thus, jar testing can help identify the parameters that promote an appropriate final water quality. While this jar test is simple to perform, it does require time, typically about 2-3 hours, including preparation and wait for settlement. Since water quality can change seasonally (summer algae growth, flood events, forest fires) the jar test has to be repeated regularly. A significantly faster method is the measurement of zeta potential expressed in milli Volt (mV). Here, the water is exposed to an electric and scientifically supported field, and the movement of colloidal particles indicates their net charge under the specific water conditions. We present details of the zeta potential method and compare results with jar testing. At the example of alum (Aluminium Sulfate, Al2(SO4)3) as coagulant, we show that the optimal dose is related to a favorable zeta potential range of -8mV to +3mV. ​ Not shown here, the use of ferric (Iron Chloride or Iron Sulfate) typically correlates with the same zeta potential range to optimize water treatment plant operation. Each coagulant chemistry has an optimal pH range where it is most effective, so it is also important to monitor pH in the plant and maintain the similar pH during the jar testing.

Products:
Zetasizer WT
Date:
March 23 2015
Language:
English

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