Managing effluent

Farm systems must be managed as a whole, and procedures put in place for routine checking and maintenance.

Some farmers have implemented effluent management plans which include:

  • Ongoing staff training
  • Documented operating and maintenance procedures
  • Checklists of individual tasks with due dates – signed off once completed
  • Irrigator runs clearly marked on farm maps.

All pipework, sumps, pumps, ponds, irrigators and other components of the system must be regularly checked and maintained.

Find information on land application

 

Daily checklist - example                           Farm irrigation map - example

Download a PDF version of the Daily Checklist example (52KB). (Opens in a new window).    Download a PDF version of the Farm Irrigation map example (456 KB). (Opens in a new window).

Effluent storage

High rainfall events are common in Northland, with soils often saturated from May through to October. It is therefore strongly recommended that, at a minimum, enough storage is provided to hold all effluent generated over that period, based on average local rainfall.

Effluent volumes

One of the most cost effective ways to improve effluent management is to reduce effluent volumes.

Effluent volumes are affected by:

  • Water use efficiency
  • Cow flow and stockmanship
  • Infrastructure design
  • Stormwater management

Find more information on reducing effluent volumes

 

Effluent disposal

NRC promotes systems which have:

  • Large storage ponds
  • Land application as the main method of disposal
  • A Resource Consent which allows the discharge of treated effluent to water, subject to meeting specific conditions.

Solids separation

Blockages in sumps, pipes, and irrigators are often caused by effluent solids. Solids must also be routinely removed from ponds which can be expensive.

The removal of solids lowers maintenance costs, makes management easier, and reduces the risk of unacceptable contamination of water.

The simplest and most cost effective option for solids removal is a sludge bed/weeping wall system. However, a number of key design and construction parameters must be followed.

Find more information on solids separation

Want to know more?

For more detailed information, call a member of our Farm Dairy Effluent team on:

0800 002 004