NEUTRALIZATION OF POULTRY WASTE BY THERMOHYDROLYSIS IN NEAR-CRITICAL WATER

Abstract

The main problem occurring during poultry and animal production is the management of waste generated in
slaughterhouses and poultry processing plants. These wastes, due to the bacteriological threat and the
difficulty in storage, adversely affect all elements of the environment and thus require quick neutralization. The
prospective method of liquidation of this type of waste is thermohydrolysis in near-critical water.
The aim of the work was to examine the decomposition of poultry waste, i.e. waste blood, soft tissues, chicken
heads, feathers, subjected to the process of thermohydrolysis in near-critical water. The decomposition
process was carried out at a pressure of 10 MPa in the temperature range of 120°C - 250°C and with a variable
residence time in the reactor.
Detailed analysis of the results allowed us to state that the longer the residence time in the reactor, the higher
the content of soluble organic compounds in the liquid phase. The beneficial effect of applying the
thermohydrolysis process on the increased reduction of organic substances present in the investigated wastes
was also demonstrated.