Translations:Benutzer:Arian/Klett-Mini-Test/1109/en

1. The Warmth Phase

In the BKV it announces itself after a short time through a steeply rising warming (Figure 16, p. 292), which then falls away just as quickly. With loose packing — that is, with unimpeded access of oxygen — the temperature can shoot up to 70 °C; with denser and moister packing the temperature rises to the optimum of 55 °C to 60 °C and then falls quite gradually to 30 to 25 °C. The warming is a function of aerobic microbial activity, which releases the solar warmth bound in the organic material from previous years and in so doing creates the elemental living-milieu for the relationally rich microbial life of the heap. The development of warmth requires steering — by means of, depending on circumstances, denser or looser setting-up, keeping moist, and where necessary subsequent treading firm. With packing that is too dense and too wet the heap remains cold; putrefaction sets in as a consequence of anaerobic decomposition. Turning is then unavoidable. With strong warming up to around 65 to 70 °C, those present in the starting material