Water/Wastewater Dairy Plus in Thailand Replaces Chlorine Disinfection
Dairy Plus Co. Ltd. in Thailand has replaced its chlorine-based disinfection system with medium pressure UV technology from Hanovia (UK). The company decided to reduce high levels of chlorine dosage throughout the process because it was proving ineffective at removing all micro-organisms, particularly in the rainy season. It was also producing an after-taste in the product.
Water to the plant is from two sources: city water and deep well water. The chlorine is only dosed at the raw water feed level, firstly after the clarifier for pre-chlorination and then some low concentration dosing after the softener.
“The incoming city water in particular has a high microbial contact – often as much as 20,000 cfu/ml in the rainy season,” commented Ying Xu, Hanovia’s Asia-Pacific Sales Manager. “At these times, high chlorine doses of even 8ppm were still resulting in microbial concentrations over 6,000 cfu/ml. Something therefore had to be done, and that’s where UV was able to help.
“UV, which is a non-chemical disinfection process, was brought to the attention of Dairy Plus by our local distributor,” continued Miss Xu. “When Dairy Plus saw the advantages of our medium pressure UV systems, which effectively remove micro-organisms without any problems of after-taste or re-infection, the company decided to switch from chlorine to UV as its main disinfection method.”
Five Hanovia UV systems are installed at the plant – four duty and one standby. Two units disinfect clean-in-place (CIP) water and two are used for treating dairy mixing water. Each UV system treats up to 130m3/hour of water. As mentioned there are two sources of raw water being used with two feeds coming out of the city water source.
Bacteria targeted for reduction include E. coli and many other common water-borne coliforms; the expected level of bacterial reduction is a total plate count of <50 cfu/ml.
“One of the main reasons Dairy Plus selected Hanovia in particular was down to the efforts of our local distributor, who helped resolve a number of initial complications. Our products are also recognised as offering the most advanced technology for high purity food and beverage applications like this,” added Ms Xu.
“Since our systems were installed the customer is very satisfied with their performance, reporting that the units are running well and producing excellent disinfection results. The company is particularly impressed by the low maintenance costs, the high energy output of the systems, and the fact that the frequency of CIP procedures has been dramatically reduced, meaning less down-time of the manufacturing process,” she concluded.
Reader Reply Card No. 32 New Chinese Website Launched
Modern Water (UK), the owner of specialist water technologies for the production of fresh water and monitoring of water quality, continues to demonstrate its commitment to China with the launch of a new Chinese website. The new website
www.modernwater.cn comes just weeks after Modern Water signed a framework agreement with Hangzhou Development Centre of Water Treatment Technology, Company Limited which will allow both organisations to jointly identify and develop projects in China, including seawater desalination plants and other water-related opportunities.
Simon Humphrey, Chief Executive Officer of Modern Water, commented: “As part of our on-going drive to extend Modern Water’s presence in China we have launched a dedicated website that will underpin our business development pursuits in the region.”
Reader Reply Card No. 33 Rapid Test Catalogue
The new rapid test catalogue from MACHEREY-NAGEL (Germany) is available. On 162 pages you can find all necessary details about our broad product range for water analysis.
For the qualitative and quantitative analysis of ions in solutions, MACHEREY-NAGEL test papers and test strips provide quick and easy screening methods for water, environmental, agricultural, industrial and laboratory monitoring.
For more detailed analysis with more sensitive measuring ranges, our colorimetric and titrimetric VISOCOLOR® test kits and our photometrical NANOCOLOR® products are the ideal choice and ensure uncomplicated analytics.
Our product portfolio is completed by rapid tests for microbiological diagnostics.
The clear colour codes within the catalogue make sure that all products are found quickly and easily.
Extensive information about chemical specifications and applications help you to find the best test kit for your requirements.
Reader Reply Card No. 34 New Combination Surfactant Electrode
SENTEK (UK), manufacturer of electrochemical sensors, have followed up their increasing success in the world market, by introducing a combination surfactant electrode, together with a mono version for those who prefer the two electrode system of measurement.
These electrodes have been developed in Croatia as a joint venture between a major University, and a large manufacturing company whose products require surfactant measurements to be carried out. They have been successfully used for over 2 years, and Sentek have entered into an agreement whereby the manufacturing of the electrode will be a joint venture between the Sentek Factory and the University.
Sentek will be responsible for the sales and marketing of these probes worldwide, and already, a lot of interest has been shown by Sentek distributors, who are impressed with the features of the probe, and also its competitive price.
The probes can be supplied with whatever plug the customer requires, and this should be specified when ordering.
Reader Reply Card No. 35 Reader Reply Card No. 36
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