The important difference between decomposition and decay

All dead organic material is broken down by nature. That happens in two different ways; in the presence of oxygen the matter decomposes and without oxygen it decays.

With or without oxygen?

In the case of the decaying process one experiences the well known unpleasant odours.Various poisonous substances as well as pathogenic bacteria develop.  Nutrients dissolve. The huge reservoirs of crude oil, gas and coal in our earth have been created through these decaying processes.

Decay smells

It is totally different in the case of decomposition, the oxygen loving bacteria (aerobic bacteria) break down the waste into valuable soil particles.  The nutrients remain and the smell is that of a good compost. In this environment soil fungi produce natural antibiotics against disease creating bacteria.

Decomposing, the basis for new life

In modern agriculture dung is often collected in the form of slurry.
The correct treatment of this slurry is decisive for its viability as either a valuable fertilizer or a problem waste difficult to dispose of. Only in homogenous aerobic conditions can slurry be used as fertilizer. The condition of the slurry is decisive for its use in sustainable agriculture and therefore needs special attention.

Slurry as waste or fertilizers?

Decomposed slurry is a valuable fertilizer


To transform slurry into an homogenous aerobic condition, continuous availability of oxygen is necessary. Supplying this oxygen mechanically is generally far too expensive due to costly input costs. Simple and efficient is the use of oxygen information as done by penac-g.  penac-g activates the aerobic bacteria in the slurry. Oxygen becomes, possibly available through the break down of water. The pre-requisite for this process is the presence of such bacteria which makes it necessary that the biological condition of the slurry should not be damaged too much by antibiotics, pesticides or detergents.

How does slurry get into a aerobic condition

The successful effect of penac-g is noticeable by the increased activity in the slurry. Bubbles forming, in amounts that vary from farm to farm, can be observed.  Further characteristics to be noticed are the break up and liquefying of the upper crust as well as the mineralisation of the sediments, the reduction of odours and an enhanced homogenising effect. Due to that the use of the agitator can be reduced or totally omitted. 

How does penac-g work?

For difficult cases the penac-g starter is available. When using penac-g starter one must pay special attention to the slurry in order to make sure that the compost doesn’t become solid.  Once the slurry starts to bubble, at the latest after 8 weeks, the normal penac-g should be used.

What to do if penac-g doesn’t work?

Application areas of penac-g



Application area

Possible advantages

For all liquid organic wastes


Bulk composting
Food processing

slurry pit

waste lagoon
catchment area for water

inexpensive highly valuable fertilizing less obnoxious smell easier waste disposal

To read the penac-G Product-Info sheet, just press here