Online headspace chromatographic method for measuring VFA in biogas reactor.

摘要: A headspace chromatographic method has been applied to measure volatile fatty acids in anaerobic digesters using gas phase extraction at pH less than 2 and temperature higher 65 degrees C. The concentration of liquid can be correlated the form Henry's coefficient. Analysis different factors batch indicated that pH, temperature, salt addition had a strong impact on apparent solubility, while liquid/gas volume ratio organic acid little impact. Larger positive efficiency, increased negative impact, indicating system was total mass-limited. best conditions were < 2.0, temperatures above 75 advantage an automated gas-extraction for analysis, compared system:is it contains no filter element, which is susceptible fouling manure samples or with high solid content. An included valerate pulse parent reactor implemented, operated short period.