• 关键词：抑制作用  厌氧消化  SO₄^2-  硫化物  硫酸盐还原菌(SRB)

• 基金项目：

• 匡欣
• 中国科学院生态环境研究中心,北京 100085

• 王菊思
• 中国科学院生态环境研究中心,北京 100085

• 摘要：采用半连续实验方法,研究了中温条件下不同硫酸盐负荷在两种不同实验基质中对厌氧体系产生的影响和抑制作用规律.结果表明,在两种基质中硫酸盐对厌氧体系的抑制作用表现出相同的规律,在一定COD负荷下,SO₄^2-负荷小于0.10-0.30g/(L·d),对厌氧体系产生轻度抑制;SO₄^2-负荷大于1.5g/(L·d)时,会产生重度抑制作用.当COD/SO₄^2-≥7,体系中SO₄

• Abstract：The inhibitory effect of sulfate on anaerobic digestion was studied using two kinds of tested substrate with semi-continuous bioassays under mesophilic condition. The results showed the inhibition of sulfate was related to sulfate, loading rate, sulfate accumulated concentration in digester and the ratio of COD to sulfate in feeding. The anaerobic system could be slightly or seriously inhibited when sulfate loading rate was less than 0.10-0.30g/(L·d) or greater than 1.5g/(L·d) respectively under certain COD loading rate. The system would be uninhibited or seriously inhibited when COD/ SO₄²-> 7 and sulfate accumulated concentration was less than 1000mg/L or COD/SO₄²-< 2 and sulfate accumulated concentration was greater than 8000mg/L respectively. The results also showed that the presence of certain sulfate and SRB may help to keep the balance of acid-producing bacteria andacid-consuming bacteria, and to prevent the digestion system from acidification.

• Key words：Inhibition  anaerobic digestion  sulfate  sulfide  sulfate reducing bacteria(SRB)

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