This investigation was done on a laboratory scale with manure samples for the “oxygen information” substances (quartz or chalk powder), the manure acidification treatment (using lactic acid) and the manure algae treatment. The investigation on the Bentonite feeding additive and the manure yeast treatment were done directly in pig housing. The laughing gas mentioned in the abstract is NO2. The “oxygen information” substances highly advertised and commonly used in Germany, Austria and Switzerland is apparently “equipped with oxygen information by means of cosmic energy”.
Further tests have to be done on a farm scale for the products that worked well in laboratory before recommendations could be done and the impact of manure acidification on soil and crop production has to be verified.
Odour reduction is claimed but no results are shown to confirm it.