Wednesday, 14 October 2020 13:18

Clean shed, clean milk

Written by  Staff Reporters
Maintain milk quality by aiming to remove all milk residues from the plant and destroying any resident bacteria. Maintain milk quality by aiming to remove all milk residues from the plant and destroying any resident bacteria.

Machine cleaning systems maintain milk quality by aiming to remove all milk residues from the plant and destroying any resident bacteria.

The benefits of selecting the right cleaning system include:

Increased milking efficiency: installing a well designed system will ensure efficient operation.

Reduced costs: installing the right system will keep operating costs to a minimum.

Automation of the cleaning process can be advantageous as it provides consistency of operation, eliminates human error, and prevents health and safety issues associated with handling strong chemicals and hot water.

If the cleaning process is automated the operator needs to periodically check the automation to ensure the plant is cleaning properly.

An easy-to-operate method of cleaning the pit and milking platform is essential. Some larger dairies are installing automatic washing systems on their milking platforms. This is especially useful if the dairy is used for long periods of time.

Features of a cleaning system

A cleaning system should have the following features

Adequately sized and configured wash line.

Minimum flow rate of 3 litres per minute per cluster.

Flow rate through the first jetter should not greatly exceed the last.

A flushing pulsator/air injector may be installed at the end of the milk line to ensure it is cleaned effectively. If the milk line is a loop line then a tap is installed near one of the milk line entries to the receiver with a flushing pulsator/air injector installed before the tap, at the top of the milk line. During washing the tap is closed and the flushing pulsator/air injector turned on.

Cause minimal liner stretch and distortion.

A high flow, rapid dump hot water service to save time filling drums.

Ensure liners and jetters are compatible.

Circulation cleaning systems

This type of system is recommended for all dairies.

At the completion of milking, the clusters are connected to ‘jetters’ that are in turn connected to a wash line.

When the milking plant is turned on the vacuum created by the plant draws water from the wash tub through the wash line.

When hot washing, the water should be circulated through the plant for 5-7 minutes, or until it reaches the minimum dump temperature (about 55°C). This is done by connecting a recycle line from the delivery line to the wash tub.

To ensure effective cleaning a minimum water flow of 3 L/min is required through each cluster.

To clean the milk line effectively a flushing pulsator/air injector is normally needed. The flushing pulsator injects air and water into the milk line every 30-45 seconds.  This injection of water and air creates a turbulent flow of wash water through the milk line which helps to effectively clean the milk line.

More like this

Keep records of vat temperature

Farmers must assess the milk cooling systems on a regular basis to ensure it meets requirements set out by the Ministry of Primary Industries (MPI).

Meeting milk cooling rules

The Ministry for Primary Industries New Zealand Code of Practice for the design and operation of Farm Dairies introduced new milk cooling standards over two years ago.

Refrigeration is crucial in milking shed

Refrigeration is a key element in ensuring milk is cooled and stored at the correct temperature and there are a range a range of products and solutions for dairy farms of varying sizes.

Taking the heat out of milk cooling

For Southland dairy farmers Ferdinand Vries and Stacey Young, running an environmentally friendly operation has become top priority in recent years.

Cool milk quickly

Milk cooling affects milk quality. The quicker the milk is cooled after milking, the better the quality when it is collected from the farm.


No stranger to winning awards

A hat-trick, a trifecta, a three-peat, whatever you want to call it, Fonterra farmer John Wyatt has become the first…

Farm consultant bags award

Sam Vivian-Greer, a farm consultant at BakerAg in Wairarapa, has been named the winner of the 2021 New Zealand Zanda…

Bumper price rises cemented

With just one more Global Dairy Trade (GDT) auction left for the 2020-21 season, bumper dairy price gains recorded in…

Machinery & Products

Let there be light

With shortening days meaning the need for good lighting is even more important out on the farm, it might be…

Honda to quit Oz ATV market

Confirming a move signalled over a year ago, in response to a directive by the Australian federal government that all…

Pasture management made easy

Those looking to use direct seeding to repair grass paddocks or plant catch crops might want to take a closer…

Shift fuel easily

Designed to fit wide-bodied utes with familiar names like Ranger, Hilux, BT-50, Triton, Navara, Dmax and Amarok, Silvan's new diesel…

» The RNG Weather Report

» Latest Print Issues Online

Milking It

Less-gassy bulls

There may soon be another tool available to cut your climate footprint - select less-gassy bulls out of a catalogue.

Rock and a hard place

OPINION: Appease the Chinese and protect your export trade, like dairy products, or infuriate them and face sanctions.

» Connect with Dairy News

» eNewsletter

Subscribe to our weekly newsletter