新型厌氧生物滤池工艺最佳软硬填料比例研究

Study on Optimal Combination of Soft and Hard Packing Media in New Anaerobic Filter

基于前期对新型软硬双床厌氧滤池的研究,采用相同软硬填料、不同的填料组合方式的6套装置,在恒温25℃下对经一级处理的葡萄酒废水(COD为3 000 mg/L左右)作进一步处理。研究结果表明:最佳水力滞留时间(HRT)为24 h,容积有机负荷率(OLR)为3.75 kg COD/(m3.d),最佳软硬填料容积比为2∶1,软填料密度为13.7 kg/m3,硬填料的堆积比重为85 kg/m3,放置方式为软填料下方硬填料上方。此时COD降解率可达到92.21%,SS的去除率可达到72.65%,沼气二次回收率达到0.133 m3/kg CODremoved。

Based on the early works of winery waste water treatment with new anaerobic filter（AF）.The effectiveness of six different new upflow anaerobic filters for treating the pretreatment winery waste water at 25 ℃ invariable temperatures was discussed.The devices have the same types of soft and hard packing media,but different media arrangement.The results showed that when influent concentration was about 3 000 mg/L,the best HRT was 24 h,and organic loading rate（OLR）was 3.75 kg COD/（m3·d）.In that situation,with the soft media on the underneath,hard media was the top of the reactors;the optimal volume ratio of soft and hard packing media was 2∶1.The density of soft and hard packing media was 13.7 kg/m3,85 kg/m3 respectively.COD removing rate was 92.12%,suspended solids（SS） was 72.65%,the biogas recovery rate was 0.133 m3/kg CODremoved in this reactor.