Abstract:

The operation characteristics of multi-internal-circle reactor （MICR） for treating dairy wastewater have been experimentally studied. The result indicates that MICR has high COD_Cr removing effects on the dairy wastewater. While the HRT is 8 h，the influent COD_Cr 2 000 mg/L，and the corresponding COD_Cr volume load 6.0 kg/（m³·d），the removing rate of COD_Cr is about 85.6% and stable. MICR has great buffering capacity for the variation of influent pH and high removing rate of SS. While the HRT is more than 8 h，the removing rate of SS keeps between 78.8% and 88.7%. The phenomena of the separation of acidogenic and methanogenic processes has been observed in MICR，with the acidogenic bacteria growing in compartment 1^﹟ and the methanogenic bacteria growing in compartment 2^﹟and 3^﹟/sup>.

Key words: multi-internal-circle reactor, dairy wastewater, operation characteristics, granular sludge

摘要：

研究了多相串联内循环厌氧反应器（MICR）处理乳品废水的运行特性，结果表明MICR 对乳品废水有很好的处理效果。当HRT 为8 h，进水COD_Cr为2 000 mg/L，相应的COD_Cr容积负荷为6.0 kg/（m³·d）时，COD_Cr去除率可稳定在85.6%左右。MICR 对pH 骤变有较强的抗冲击能力，对SS 的去除率较高，当HRT＞8 h 时， SS 去除率保持在78.8%～88.7%之间。MICR 存在明显的产酸相与甲烷相分离的现象， 1^﹟反应室以产酸菌为主，2^{﹟/sup>、3﹟反应室以产甲烷菌为主。}

关键词: MICR, 乳品废水, 运行特性, 颗粒污泥

CLC Number: 

• X703