Sledge hammer to crack a nut
Over the last year, we have frequently been accused of forcing systems into the market much larger or more expensive than need be. In one way there is an element of truth in this. Our air scrubber systems regularly outperform the levels set out in our certification. We for instance regularly register 0 ppm ammonia output or ´no odour´ detectable from our air scrubbers. In these cases, it could be argued, why build such a large air scrubber when something a third of the size will do? The reason being that the perfect situation is not always reality and of course we don´t make the rules. The sledge hammer therefore becomes the guarantee authorities and society are looking for and as such we believe sticking to the advice given by the air modelling experts. This reduces the risk of the farmer getting in trouble with the regulators, that could ultimately lead to production being closed down and the ‘licence to produce’ suspended.
Cutting corners of air scrubber systems: not an option
We have frequently been asked to deliver smaller air scrubber systems. For example a unit that handles 25, 50 or 120,000 m3/hour air capacity for a house of 50,000 broilers or 16,000 layers that requires considerably more for permitting. In these cases we do not cut corners. Yes it is possible a smaller unit with ‘good production’ could meet the levels of reduction required, but there are no guarantees and again the rules say otherwise.
This chart gives an indication of levels of reductions based on maximum air capacity as set out in the DLG, eg. 6260 broilers (For the exhaust cleaning system to achieve the separation capacities in table 1 it is necessary to operate the system continuously and as specified from the 7th day of growing. It must be ensured the cleaning system delivers 70% of the maximum summer air flow rate (exhaust air cleaning design rate) that is required according to the German order on protection of animals and the keeping of production animals (4.5m3/kg live weight per hour).