Automatic analyser/computer system for adaptive control of phosphate concentration during fermentation
M. Pécs, L. Szigeti, Gy. Lovrecz, E. Püngor, László Nyeste, F. Holló · Journal of Analytical Methods in Chemistry · 1985
employed only for the control of slow processes where concentration changes slowly; fermentation processes are slow (most of the variables have longer response times than AAs).(1"5 vvm), and the temperature was 30 C. Manual method for inorganic phosphate measurement During the fermentation experiments, a manual phosphate analysis was run at the same time as the automatic assay.The COMECON Standards for Water and Wastewater Analytics were used [16], these are based on ammonium molybdate reaction.Cell concentration measurement Microbial growth was monitored by measuring optical density after a 20-fold dilution, at 620 nm, in a cm cuvette.The instrument used was a SPEKTROMOM 410 spectrometer (Hungarian Optical Works, Budapest, Hungary).