THE SIMPLE WAY FOR MONITORING THE PROCESS BIOLOGY
For efficient biogas production sludge bacteria require a pH in the range of about 6.5 to 8. A stabilization of the pH in this range is mainly (> 85 %) achieved by the large amounts of bicarbonate (= buffer substance), which are released during the anaerobic degradation. Disturbances of the biological degradation regularly increase the level of volatile fatty acids. Because acids consume bicarbonate, this leads to a decrease in the level of bicarbonate. However, by the buffering action of the bicarbonate, the pH value is hardly reduced initially.
Only when the disturbance persists over time and the stock of bicarbonate is largely exhausted, is there a rapid drop in the pH. This leads to a reduced biogas production or, in extreme cases, to a total loss of the biogas production.
ADVANTAGES OF THE MEASUREMENT TECHNOLOGY
» Process disturbances can be recognized much earlier than by a simple monitoring of the pH – there is more time to prevent economic losses
» Very easy handling
» Results in just 5 minutes!
» Data are easy to interpret
» No calibration is required
» Cheap to buy, very low consumption costs
» Robust, long-term proven measurement technology