硫黄酸化細菌による硫化水素含有アルカリ廃水の生物学的処理

概要

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We have studied an efficient biological process to treat alkaline wastewater containing sulphide by sulphur bacteria, which was acclimated from activated sludge by thiosulfate and active at neutral pH. The sulphide removal rate of the sulphur bacteria was 135-140 mgS2-·g-1 MLVSS·h-1 at 20°C and fifty times as large as that of activated sludge. The sulphur bacteria finally oxidized sulphide to sulphate. Low water temperature and large sulphide-sludge loading tended to restrain the oxidation of sulphide to sulphate, which brought the accumulation of sulphur except sulphate in the reactor. The biological process by the sulphur bacteria could treat the alkaline wastewater containing sulphide of 300 to 600 mg·l-1 with HRT 8 hours and the water temperature of 20°C. H2S emission from the reactor was never observed. The sulphur bacteria could maintain good settleability under FeCl3 addition and the gross yield coefficient was about 0.14 KgVSS·kgS2-.
社団法人　日本水環境学会の論文
1996-01-10