DEODORIZATION METHOD FOR SLUDGE SLURRY, DEODORIZATION METHOD FOR DEHYDRATED CAKE AND DEODORANT

摘要

PROBLEM TO BE SOLVED: To provide a deodorization method for sludge slurry, with which odor derived from hydrogen sulfide or methyl mercaptan generated from sludge slurry generated in a wastewater processing facility can be stably suppressed speedily and for the long term without depending on the kind of sludge.

SOLUTION: This deodorization method for sludge slurry includes: a step of adding, to the sludge slurry, a deodorant containing a first component comprising nitrate and/or nitrite and a second component comprising sulfite and/or hydrogen sulfite; or a step of adding the first component and the second component to the sludge slurry, respectively; wherein a ratio of the second component in total 100 mass% of the first component and the second component is 15 to 85 mass%.

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