NSW: (02) 4924 8248 | QLD: (07) 4952 3377 | WA: (08) 9248 5771

08:30 – 17:00

Monday to Friday

27 Kalinya Close

Cameron Park, NSW Australia 2285

+61 2 4924 8248

Pasture Based Dairy Effluent Management

Solutions for Pastured Based Dairy Farms

Improve your operating costs with a safer, simpler and smarter solution to your problem.

Improving overall cow health

Although we cannot control the environment, we can monitor our pasture, loafing and calving areas to minimise udder infection direct from the farm environment we operate in. Bacteria need three ingredients to proliferate. Although it is hard to control moisture and temperature levels, it is possible in a lot of situations to ensure our cows have clean areas to lay, rest and ruminate.

Bacteria that commonly cause environmental mastitis are Streptococcus uberis or Escherichia coli. Other environmental organisms causing mastitis include other coliform bacteria (Klebsiella species, Enterobacter aerogenes), Pseudomonas aeruginosa, Bacillus cereus, Arcanobacterium (formerly Actinomyces or Corynebacterium) pyogenes, Serratia species, Nocardia species, Candida (yeast) and Protheca (algae).

The recommendations that no more than two pats of manure are present per square metre and no water is visible in foot prints are crude estimates designed to focus farmers’ attention at least on gross contamination, given the lack of other more sophisticated monitoring techniques. Checking for fresh liquid manure, rather than dried pats, gives an indication of recent faecal contamination.
Practical and economic factors influence the surfaces available for calving cows and must be individually assessed for each farm.

Introducing the McLanahan Enviro System

McLanahan Enviro System is a complete package for managing livestock effluent. The system efficiently deals with effluent from dairy, saleyard and feedlot operations using proven technology. Automation of the entire process eliminates unnecessary time and effort handling effluent blockages, breakdowns and spillages.

Worry Free Effluent Management
McLanahan Systems are designed in Australia and serviced by experienced technicians. The system includes unique features such as agitators and pumps that can be winched from the tank and serviced without entering the tank or draining effluent. The Slope Screen Separator includes stainless steel hinged covers and an autowash system to improve separation and reduce maintenance. Access platforms and gates built to Australian Standards provide safer access and operation of the plant.

With intelligent automation built in, the McLanahan Enviro System has an automated cleaning cycle with each use of the system.

Optional Add-Ons: Greenwater Processing System
The McLanahan Greenwater Processing System can be incorporated after the Enviro System to provide a storage space for processed livestock effluent pre- irrigation.

The inclusion of the McLanahan Greenwater Processing System can potentially eliminate the need for effluent ponds, and provide a safe way to store liquids before they are pasture applied.

The processed liquid can be used for multiple applications, including:

  • irrigation with nutrients for pastures or crops
  • floodwash for holding yards and feedpads


Free download

For more information about the Enviro System range, download the brochure here

Effluent Management

Seepage into waterways

Environmental guidelines dictate we must adhere to some basic principles. All effluent from the dairy, feedpads, standoff areas, underpasses and tracks must be contained and reused (most commonly spread back on pastures and crop).

  • Effluent must not enter surface waters (including billabongs, canals, springs, swamps, natural or artificial channels, lakes, lagoons, creeks and rivers).
  • Effluent must not enter ground waters either directly or through infiltration (for example seepage from ponds).
  • Effluent must not contaminate land (discharging effluent onto the same small area over time will cause nutrient overload and contaminate land).
  • Offensive odours must not impact beyond property boundaries

Find out more about the equipment McLanahan has designed for the dairy industry

McLanahan Manure Separators, Liquid Solid Separators, Sand Manure Separators and Manure Dryers are part of an extensive range of equipment designed for pasture based or intensive dairy farming.

Separated manure fibre is a great source of organic matter containing nutrients to incorporate in to cropping programs and the separated liquid (green water) portion is then easy to irrigate on pasture or crops.

Products available include:

  • Screw Press Separator
  • Sloped Screen Separator
  • Pumps & Agitator’s
  • Elevated Platforms
  • Whole Systems including level sensor & electrical controls

Get a quotation

How we have helped pasture based dairy operations

McLanahan has Technical Specialists who are qualified at the nationally recognized Design livestock Effluent Systems, delivered by the Department of Economic Development in partnership with National Centre Dairy Education.

Developing an effective dairy effluent system requires detailed planning taking into consideration the farm’s individual characteristics, such as soil type, distance to waterways as well as how the system can be integrated into existing infrastructure and management strategies such as fertiliser applications and irrigation management.

Choosing the most appropriate effluent system whether it be pondage systems or direct application, will depend on what is more practical, easier to maintain and has the potential to return the most benefit.

McLanahan conduct farm audits and can provide complete systems from design through to supply and installation of specialist effluent equipment. These may be off the shelf systems to suit your cow numbers or customised for special requirements and difficult site locations.

McLanahan have our own in house engineering, drafting and service teams.

Mid North Coast, NSW

Located on the Mid North Coast, this small dairy operation with 400 milking cows needed a transfer pump to manage their effluent waste. Currently, the effluent system traps large solids in a sump. From there, the effluent is pumped into a twin effluent pond system, with a hose transferring the effluent from the pump to the first pond.

McLanahan’s solution was to implement a sloped screen separator at the end of the feed pad. The sloped screen separator has the ability to process anywhere between 300 – 600L/minute.

Coupled with the sloped screen separator is a transfer pump. Intelligent design features included stainless steel threading on the pump shaft to prevent rust and corrosion over time. All controls are located at the top of the pump for ease-of-use.

The project scope included the pump itself, for a 1.8m-deep pit, a 3-phase, 7.5 kW motor, a belt and pulley kit (7.5 kW) and the starter panel – also 3-phase and 7.5 kW.