T A

Fig. 13.14 Flow sheet of a composting plant with rotting drum in closed shed. sition. Maturity describes the suitability of the compost for plant growth and has been associated with the degree of humification. Several methods are used in practice to determine maturity and stability e.g., simple field tests in Dewar flasks, tests on plants, respiration activity, chemical analyses, nuclear magnetic resonance (NMR) 1 to 26 . The various procedures for determining the maturity and stability of...

Principles of the Heap Technique

Heap Technique For Soil Treatment

The heap technique for biological soil treatment is an ex situ technology, that is, the contaminated soil is excavated and separated from the uncontaminated material. In contrast to so-called 'landfarming', where the contaminated material is spread over a large area in a comparably thin layer and mixed with the existing soil cover, in the heap technique the contaminated soil is prepared by homogenizing and mixing with additives and then piled up in heaps. Figure 10.1 shows the different steps...