Slurry Aeration Systems
The Dairypower Slurry Aeration System is now established as being the most cost effective and environmentally friendly methods of keeping slurry in a homogenous pumpable state that is always ready to spread. The system introduced to the Irish market in 1998 is now established as a market leader in Ireland with over 200 systems in operation. The system is approved by the Irish Department of Agriculture and in 2008 we installed a system for 16 slurry tanks in the Teagasc Research Farm (Government Farm) in Johnstown Castle, Wexford. The system has been introduced to the export market this year, with systems already installed in the U.K.
The system is relatively simple because it employs only a low energy consumption electric motor and roots blower pump, electric rotary valves and sdf-closing neo-prene non-return outlet valve. All the piping is 50mm class D upvc which neither corrodes nor degrades.
Working on a time switch, the system is fully automatic and would typically run for 3 - 4 periods each day without any need for human intervention. Furthermore, the running costs have been shown by independent evaluation to be as low as €1 per day.
The introduction of air into the storage tank has two main effects on the slurry - that of effective mixing caused by the physical action of rising air bubbles, and that of odour reduction of the promotion of aerobic bacteria which digest toxins, fatty acids and ammonia and reduce the biological oxygen demand of the slurry. In the event of a tank being neglected, the
Slurry Aeration System installation is perfectly capable of mixing heavily crusted slurry.
The Dairypower slurry aeration system can be installed in concrete tanks, slurry stores and lagoons.
- Slurry is maintained in a homogeneous, easy-to-manage state
- Complete consistency - every load has the same uniform consistency with an even distribution of slurry nutrients.
- Improved palatability of grass
- Grass has a better regrowth rate after spreading
- Big savings on Fertilizer
- Low maintenance costs no mechanical parts are in contact with the slurry
- Animal welfare (due to a great reduction of odour / gases during storage and spreading)
- Does not 'tie up' a tractor
- Low Running Costs
- Low Capital Cost
- No risk of damage to the store
The electric drive unit is designed for a long and trouble free life with low noise level. The roots blower pump is protected by a suction filtration system, helping to extend the lifetime of all components. The system operates on a high volume low pressure basis (5 bar) so the smooth operation does not disturb the animals. Adjustable air pressure makes it possible to optimize each plant to actual conditions.
- 1.5 – 7.5 kw Motor
- Air Roots Blower Pump with option of
100 - 480 cubic metres output per hour
- Oil level gauge
- Pressure Level gauge
- Pressure Relief valve
- Oil Suction filter
- Silencer Housing
Dairypower originally installed the system using electric pneumatic air valves, but has now developed and patented a very simple trouble free electric rotary valve which operates on 24 Volts.
The blower pump supplies air through a manifold to the rotary valve which in turn distributes air through the 50mm upvc piping to an outlet-branch which aerates a section of the slurry tank for a set period of time.
The rotary valve then simply rotates to distribute air to the next outlet-branch and continues in sequence until the entire tank is aerated.
The Dairypower slurry aeration system is controlled by a very simple user friendly electronic control box. The control box has a manual and automatic control. The
automatic function is controlled by a 24 hour timer. Each rotary valve has its own on / off switch for flexibility and individual customization.
The pipe we use is 50mm class D upvc which neither corrodes nor degrades. The pipework is fixed to the tank floor by stainless steel brackets and stainless steel bolts. Each supply pipe feeds an outlet-branch which has sdf-closing neo-prene non-return outlet valves which open when the air is supplied from the pump.