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TWO‐STAGE DRY ANAEROBIC DIGESTION PROCESS CONTROL OF BIOWASTE FOR HYDROLYSIS AND BIOGAS OPTIMIZATION

Abstract

This study offers an advanced management system which adapts to most of the two‐stage anaerobic dry treatment plants that do not benefit from a local expert in biowaste treatment. This approach takes advantage of pH sensors to control the process within the optimal range to enhance the hydrolysis and to stabilize and increase the biogas production. Applying automatic pH control in the operational regime by a shift between direct recirculation in the 1st stage or using digestate of the 2nd stage for percolation the pH in the 1st stage could be kept low at pH 5.2±0.2 over the whole operation period of 25 days. The results show that the energy efficiency of the 2‐stage dry anaerobic digestion process can be increased from 34% to almost 60% by controlling the pH in the 1st stage.

Autoren:   Federico Micolucci, Hinrich Uellendhal
Journal:   Chemical Engineering & Technology
Jahrgang:   2018
Seiten:   n/a
DOI:   10.1002/ceat.201700467
Erscheinungsdatum:   19.01.2018
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