Friday, 17 March 2017 08:55

Patented technology makes job easy

Written by 
Weeping wall constructed for a 800-cow farm. Weeping wall constructed for a 800-cow farm.

The Clean Green Effluent Company says its multi-award winning system leads the way in effluent technology.

This simple but effective automated distribution system has a minimal footprint and needs no large ponds, it says.

The system starts with a patented Weeping Wall encased in a concrete lined bunker; the Weeping Wall removes the solids and allows the liquid to flow into a pump chamber.

Green water is then stored for recycling. Outside yards can then be automatically cleaned using floodwash or backing gate nozzles, effectively cleaning the yards without the use of fresh water; this reduces the water take from the typical 50-70L/cow to 20-25L/cow.

Reducing water consumption has a two-fold effect, the company says. “Firstly, it reduces the cost of freshwater extraction and filtration; secondly, it reduces the amount of effluent to be dispersed to land.”

The Clean Green system allows liquid to be dispersed over large areas at the low rate of 0.25mm application depth. Effluent can be dispersed safely most days of the year.

“As we can disperse effluent year-round at low application depths, there is no nitrogen leaching and the pasture retains all nutrients provided, thus increasing pasture growth by up to 35%.”

No large ponds are required due to the 0.25mm application depth, so storage requirement is minimal.

The company says its system requires as little as two 30,000L water tanks to provide storage for greenwash and effluent dispersed.

“The advantage of the water tanks is they are guaranteed not to leak and have no rainwater catchment. Rainwater catchment in large ponds equates to doubling the amount of effluent being stored and having to be dispersed by pump to land.

The Weeping Walls are designed to retain 12 months of solids. Removal of solids is done with a digger and chuck wagon. The solids retained in the system retain 100% of the organic nitrogen and a large percentage of the liquid nitrogen. This dry matter then becomes a slow release fertiliser suitable for crop planting.

“This cost effective system can be adapted to existing sheds or installed on new conversions. Remedial work on large leaking ponds and non complying systems can be cost-effectively remedied by replacing with a complete Clean Green effluent system.”


More like this

‘Secret weapon’ can save water

A farm dairy effluent system must collect all animal excreta deposited in contained areas, plus any other liquid or material coming into contact with it, says system designer Numedic.

Manage your pond levels

Adequate storage offers flexibility for effluent application to fit around farm activities and irrigation conditions, according to DairyNZ.


Milking It

Taking it easy

Cows in Germany are being given three-month maternity leave to take care of their offspring.

A cow of an idea

GDP per capita in Zimbabwe (in constant dollars) is about where it was in 1960, and markedly lower than it…


» Connect with Dairy News



South Island wool sale eases

South Island wool sale eases

The 4700 bales on offer saw a 74% clearance with mixed results, however all prices paid locally are still above…

Wool continues to ease

Wool continues to ease

The 7250 bales of North Island wool on offer saw a 72% clearance with most types easing further.