PROCESSING METHOD OF ORGANIC WASTE WATER
PROBLEM TO BE SOLVED: To provide a method capable of recovering a processing capacity of a methane fermentation tank by a simple method.SOLUTION: In a processing method for performing an anaerobic treatment by circulating waste water containing an organic matter through a methane fermentation tank,...
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| Format: | Patent |
| Sprache: | eng ; jpn |
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| Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a method capable of recovering a processing capacity of a methane fermentation tank by a simple method.SOLUTION: In a processing method for performing an anaerobic treatment by circulating waste water containing an organic matter through a methane fermentation tank, when a processing capacity of a methane fermentation tank operated already is lowered, treatment water discharged from the methane fermentation tank is returned to a pre-stage part of the methane fermentation tank so that a volatile fatty acid concentration in the methane fermentation tank becomes 1,000 mg/L or lower, to thereby recover the processing capacity.SELECTED DRAWING: Figure 2
【課題】簡便な方法によりメタン発酵槽の処理能力を回復させる方法を提供する。【解決手段】有機物を含有する排水を、メタン発酵槽に通水して嫌気性処理を行う処理方法であって、すでに運転されている前記メタン発酵槽における処理能力が低下した場合に、前記メタン発酵槽の揮発性脂肪酸濃度が１０００ｍｇ／Ｌ以下となるように、該メタン発酵槽から排出される処理水を該メタン発酵槽の前段部に返送することにより前記処理能力を回復させる。【選択図】図２ |
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