The National Dairy Development Board (NDDB) is expanding its footprint in Eastern and North-Eastern States

NDDB: new dairies to expand its footprint in India

The National Dairy Development Board (NDDB) is expanding its footprint in Eastern and North-Eastern States in the country by taking dairy development activities in some of the most backward areas of these regions together with local partners, it said in a statement recently. Curious, VWI&ME looked up typical requirements for dairy valves.
The National Dairy Development Board (NDDB) is expanding its footprint in Eastern and North-Eastern States

Article by John Butterfield

The Jharkhand government recently signed a memorandum of understanding (MoU) between NDDB and Jharkhand Milk Federation (JMF) till March 2024.

JMF has four dairy plants (Ranchi, Deoghar, Koderma, and Latehar) with a total installed capacity of 140 TLPD and one 50 MTPD cattle feed plant at the Hotwar, Ranchi. The government of Jharkhand has requested NDDB for construction, establishment, and management of three new dairy plants in the State which are being done on priority by NDDB on a turn-key basis, the statement said.

Similarly, NDDB has been able to turn the West Assam Cooperative Milk Union (Wamul) in Assam, which was on the verge of closing down in 2008 into a viable entity, and today Wamul’s Purabi is a prominent dairy brand in Assam.

NDDB is also providing technical and manpower support for milk procurement, processing, marketing, and training and capacitybuilding activities. NDDB-managed Wamul has been recording continuous growth in the milk procurement and marketing indices, said NDDB.

NDDB has been conducting benchmark surveys in Nagaland, Manipur, and Tripura at the request of cooperative milk producers’ unions and has prepared reports for estimating milk production potential in these States. NDDB also had preliminary discussions with Sikkim Milk Union for the latter’s future development.

Cleanliness paramount

As VWI&ME discovered with just a few mouse-clicks, valves are used for various functions in dairies, such as turning flows on and off, directing flow, regulating pressure and flow control. In this case, flows can refer to the actual product, but also other media such as water, steam, cleaning agents, coolant and compressed air.

They key difference between these systems lies in the choice of materials: steel, copper, aluminium and plastic may be found, but for reasons of hygiene stainless steel is the number one choice for all components that come into contact with the actual product. The two grades that are typically used are AISI 304 and AISI 316 stainless steel. Piping components are normally connected using welded joints for reasons of purity. However, if items may need to be removed for cleaning, maintenance, replacement, etc, then threaded union joints or clamp fittings are used.

The challenge in a dairy is, of course, in ensuring product purity. This requires extensive cleaning of all wetted surfaces in process lines between batches and/or on a regular basis. Valves that are used are therefore designed to avoid dead spaces and the accumulation of matter.

For reasons of efficiency many dairies are now designed with so-called CIP systems, short for Cleaning In Place. After each batch has been processed, the pipework and vessels can be flushed using a selection of cleaning fluids, such as lye, acid, rinsing water and fresh water. Each fluid is contained within its own circuit to avoid crosscontamination. All piping systems are designed to ensure that there are no dead ends and that all equipment and pipework can be properly drained.

Over the years various options have therefore been used to start and stop the flow of the cleaning agents through the actual process lines. These include ‘swing bends’ which require manual coupling and uncoupling as well as arrangements with multiple shut-off valves.

However, for reasons of efficiency mixproof or switch-over valves are now widely used. With just a single valve unit, the operator can allow a cleaning fluid to pass through the process line, and afterwards isolate the process pipeline from the cleaning fluid pipeline.

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