The purpose of any solids management system is to collect the effluent and apply it to land in a way that is friendly to the three ‘P’s:
- People – Less exposure to effluent; less labour required; easy un-complicated
- Planet – Retains nutrients for plant growth; less processing (lower carbon footprint)
- Profit – High nutrient value for better crop growth; lower capital cost; lower operating cost
The best way to achieve a high ‘3 P’s’ score is to manage effluent as one product:
Collection & Storage
If your feedpad or yard has the correct slope, then floodwashing with recycled effluent is best practice. Greenwater for floodwash can be decanted off the effluent pond – no separation required. Using a floating suction pipe and allowing the pond to settle the water decanted is perfect for floodwashing.
The secret to effective floodwashing is fast dumping to create a wall of water that collects the solids and carries them straight to the pond. A stone trap is advisable wherever stones are present but is not essential.
Stirring
Effective pond stirring is key to the success of the system. The stirrer must be shore-mounted and create a strong horizontal thrust across the pond, bringing the solids into suspension.
Nevada Electric stirrers are ideal as they have the powerful Typhoon™ propeller which is capable of mixing large ponds. The angle and depth adjustment help ensure the whole pond is thoroughly mixed prior to pumping. If electricity is not available, a tractor powered stirrer can be used. Nevada have a range of stirrers and extensions for every situation.
Pumping & Irrigation
The homogenous mixture can be pumped successfully with a solids-handling progressive cavity or centrifugal pump. These can be electric, tractor driven, or diesel powered.
Irrigation of whole effluent can be through the Nevada Rainwave™ drag hose system, traditional travelling irrigators or stationary rain guns.
Slurry tankers are another excellent method of applying effluent to land. No effluent passes through a pump, and effluent can be applied to the whole farm. This makes best use of nutrients for maximum profit.
Managing effluent as one product will achieve the highest 3 ‘P’s score when compared to solids separation systems. Whether it is a new installation or upgrading an existing system give the Nevada guys a call for free advice. 0800 464 393
