Method for rapidly determining volatile fatty acid concentration in anaerobic reactor
A volatile fatty acid, anaerobic reactor technology, applied in the direction of chemical analysis by titration, can solve the problems of decreasing measurement accuracy and increasing experimental complexity.
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Embodiment 1
[0059] At room temperature, 0.04 L of effluent from artificial synthesis reactors with phosphate concentrations of 0, 1, 3, and 6 mM and acetic acid concentrations of 5 mM were respectively configured.
[0060] ① Under the conditions of electromagnetic stirring at 300rpm and a drop rate of 0.7mL / min, add hydrochloric acid solution with a concentration of 0.05M to the effluent with a phosphate concentration of 0mM until the pH is 4.7, and record the volume at this time (V 0 =42.15*10 -3 L). Continue to titrate with 0.05M hydrochloric acid solution until the pH of the system is 4.2, and the amount of hydrochloric acid is V x =9.85*10 -4 L, the process takes up to 20 minutes.
[0061] With the calculation formula of the present invention:
[0062] C VFA = ( [ H + ] ...
Embodiment 2
[0074] At room temperature, respectively configure 0.04 L of artificially synthesized reactors with ammonium salt concentrations of 0, 1.5, 3, and 4 mM and acetic acid concentrations of 1 mM.
[0075] ① Under the conditions of electromagnetic stirring at 300rpm and a drop rate of 0.7mL / min, add hydrochloric acid solution with a concentration of 0.05M to the effluent with an ammonium salt concentration of 0mM until the pH is 4.7, and record the volume at this time (V 0 =40.53*10 -3 L); continue to titrate with a hydrochloric acid solution with a concentration of 0.05M until the pH of the system is 4.2, and the amount of hydrochloric acid is V x =2.16*10 -4 L, the process takes up to 20 minutes.
[0076] With the calculation formula of the present invention:
[0077] C VFA = ( [ H + ] ...
Embodiment 3
[0089] At room temperature, 0.04L of effluent from artificial synthesis reactors with sulfide ion concentrations of 0, 1, 3, and 6mM and acetic acid concentration of 1mM were respectively configured.
[0090] ① Under the conditions of electromagnetic stirring at 300rpm and a drop rate of 0.7mL / min, add hydrochloric acid solution with a concentration of 0.05M to the effluent with an ammonium salt concentration of 0mM until the pH is 4.7, and record the volume at this time (V 0 =40.54*10 -3 L); continue to titrate with a hydrochloric acid solution with a concentration of 0.05M until the pH of the system is 4.2, and the amount of hydrochloric acid is V x =2.23*10 -4 L, the process takes up to 20 minutes.
[0091] With the calculation formula of the present invention:
[0092] C VFA = ( [ H + ...
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