Purpose of a slurry acidification system

Purpose of a slurry acidification system

The acidification of slurry is in agriculture – among others, according to the European Regional Development Fund – the most efficient and cost-efficient technology for reducing greenhouse gases and for nutrient recovery. The main advantage of the acidification of slurry in the stable is that the greenhouse gas emissions from the stable stage are immediately reduced.

Then also in the months of storage as well as during the spreading, further evaporation will be avoided and this thus has a sustainable and efficient emission-reducing effect on the entire emission chain of the nutrients.

Advantages of a slurry acidification system

The investment aid for structural measures (cantonal investment loans) and facilities for the realization of ecological goals as well as for meeting the requirements of homeland and landscape protection (Federal Subsidies Ordinance FSO) create support throughout Switzerland of up to 75% of the total acquisition costs of such a slurry acidification plant. Gladly you are welcome – with the following simulation model – to carry out your operating calculation with regard to ammonia volatilization:


Sustainable development from which everyone involved
– in the form of an economic, ecological and social return – can benefit and grow. This is what we stand for!

For people, your livestock and our environment

The slurry acidification systems are developed and built in Switzerland

Systems / construction types

Systems / construction types

The processing system in cattle stalls differs significantly from that in pig stalls. We therefore speak of a “canal system” in cattle farming and a “flush system” in pig farming.

In addition, a processing process for farms with mixed animal husbandry was specially developed for Switzerland, in which the said “canal system” and the said “flush system” are combined, but are always operated separately from one another.

How it works

How it works

The hydrolytic enzymes (i. e. urease) formed by bacteria in the feces begin to break down the urea molecules directly, depending on the pH value and weather conditions. This process is known as “hydrolysis”.

The urea contained in the urine is split into ammonia and carbon dioxide with the help of water and then evaporates in the atmosphere, where it becomes a harmful greenhouse gas. Greenhouse gases are gases that absorb and emit radiation energy in the thermal infrared range and thus cause the greenhouse effect. This effect in turn is responsible for the temperature on the earth’s surface.

Ammonia emissions in detail

In summary, it can be stated that Switzerland ranks second behind the Netherlands in terms of proportional ammonia emissions and that around 60’000 tons of ammonia gases are produced in Switzerland every year. 92% of these come from Swiss agriculture.

The proportion of these ammonia emissions, which are generated exclusively in animal husbandry, is approx. 93% and that in plant cultivation approx. 7%. The emissions from animal husbandry are as follows: