PROBLEM TO BE SOLVED: To provide a waste liquid treatment device capable of appropriately annihilating pathogenic microbes of a soil-borne disease.SOLUTION: The waste liquid treatment device 3 treats waste liquid containing pathogenic microbes of a soil-borne disease, and the waste liquid treatment device 3 includes an annihilating treatment means 34 for annihilating the pathogenic microbes contained in the waste liquid. The annihilating treatment means 34 has a separation treatment means 38 for separating the pathogenic microbes from the waste liquid and annihilating the separated pathogenic microbes. The separation treatment means 38 includes a separation means for filtering the waste liquid and separating the pathogenic microbes, and a heating means for heating and annihilating the pathogenic microbes separated in the separation means. Also, the heating means has a steam generation means for annihilating the pathogenic microbes by blowing steam to the pathogenic microbes separated in the separation means and directly heating them.COPYRIGHT: (C)2013,JPO&INPIT【課題】土壌伝染病の病原微生物を適切に死滅できる廃液処理装置を提供する。【解決手段】土壌伝染病の病原微生物を含む廃液を処理する廃液処理装置3であって、この廃液処理装置3は、廃液に含まれる病原微生物を死滅させる死滅処理手段34を備える。この死滅処理手段34は、廃液から病原微生物を分離しこの分離した病原微生物を死滅する分離処理手段38を有する。分離処理手段38は、廃液を濾過して病原微生物を分離する分離手段と、この分離手段にて分離した病原微生物を加熱して死滅させる加熱手段とを有する。また、加熱手段は、分離手段にて分離した病原微生物に蒸気を吹き付けて直接加熱することにより、病原微生物を死滅させる蒸気発生手段を有する。【選択図】図1