| 混合金属离子对厌氧生物处理过程抑制作用的研究 |
| 摘要点击 626 全文点击 733 修订日期：1993-08-06 |
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| 中文关键词 厌氧生物处理 重金属 抑制作用 |
| 英文关键词 anaerobic digestion heavy metal inhibition |
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| 中文摘要 |
| 研究了在厌氧生物处理中同时存在铜、锌、镍和铬多种重金属离子时。其对厌氧生物过程的影响;考察了不同日加入金属总量与抑制程度的关系。当日加入总量低于20mg/L时,对体系无影响;在20-30mg/L时,产生轻微的抑制;高于50mg/L时,对体系产生明显的抑制作用。为维持厌氧生物过程正常运行,每g污泥(干重)所承受的由每日进料引入体系的混合金属离子的总量应不超过0.6mg;厌氧体系中的溶解态金属总量应低于1.0mg/L.实验还表明,混合金属离子对厌氧体系的抑制作用比单个金属离子要强。 |
| 英文摘要 |
| he inhibition of mixed heavy metals(copper,zinc,nickel and chromium)to the anaerobic system in a digester,and the relationship between the concentration of heavy medals daily added and the degree of their inhibition were studied. No inhibition was found when the daily addition of mixed heavy metals was less than 20 mg/L.The digestion system was slightly inhibited when the daily addition was 20-30mg/L;was seriously inhibited when the daily addition was more than 50 mg/L;and was in normal operation when the ratio of the concentration of heavy metals daily added to that of activated sludge(dry matter)was less than 0.064% and the total concentration of dissolved,mixed heavy metals in the system was less than 1.0 mg/L. The results show that mixed heavy metals had a much stronger toxicity to an anaerobic system than each of the single heavy metals. |
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