メタン発酵液の膜濾過性への液中有機酸濃度の影響

概要

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For the purpose of developing a methane fermentation membrane bioreactor for wastewater treatment, the influence of operations concerning the fermentor on the filtration characteristics was examined. The fermentation broth, which was produced by an ill-poerated reactor ot concentrate the organic acid in the broth and which was neutralized by NaOH, was used for filtration tests. And also, the fermentation broth from the stably methane fermented reactor was used for filtration tests to compare the filtration characteristics. This examination has revealed that the permeation flux of ill-operated fermentation broth was 1/2 taht of stably methane fermented broth. The analysis for filtration resistance suggests that the salt concentration which was produced by the neutralization of organic acid affected the permeability of the particle-packed layer formed on the membrane surface through filtration. This estimation was confirmed by the measurements of specific filtration ressitance of fermentation broth.
1989-01-25