足够的溶解氧是保证好氧生物处理系统高负荷运行的条件,这也是HCR工艺的优势所在。一般情况下,HCR系统的污泥浓度在10g/L左右,最高可超过20g/L。反应器中生物量之大,决定了其负荷值必然高。试验和已有工程的运行结果显示,HCR的容积负荷最大可达70kgBOD5/(m3·d),小试可达100 kg BOD5/(m3·d);其污泥负荷值可以超过6 kg BOD5/(kgSS·d)。
实例1 拉维克市雀斯科夫锐兹公司(TreschowFritze, Larvik)的半化学纸浆废液,其COD浓度高达20000mg/L,采用HCR工艺处理,其容积负荷达80 kg COD/(m3·d) ,COD的降解率达〖CM(22〗到了70%。废水中含有过氧化漂白污水,但它对于水处理的效果没有任何不良影响,其剩余污泥的产率约为0.2kg SS/kg COD。
实例2 在威尼斯拉市的汉斯霍司公司(Hunsfos,Vennesla),亚硫酸盐化学纸浆浓缩液(来自化学再生系统)COD的变化范围为5 000~10000 mg/L,污水中同时含有糖醛,因而对附近纳污区的鱼类构成危害。用HCR工艺处理,容积负荷平均达60 kg COD/(m3·d) ,COD的降解率为80%,糖醛的去除率达100%,剩余污泥的产率仅为0.15 kg SS/kg COD。
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