玄武岩纤维填料生物接触氧化法提升食品废水处理的效果评价:以日本Mizkan Holdings美浓加茂工厂为例

EVALUATION OF IMPROVING EFFICIENCY OF BIOLOGICAL CONTACT OXIDATION PROCESS BY BASALT FIBER BIOCARRIER IN FOOD WASTEWATER TREATMENT:A CASE STUDY OF MINOKAMO FACTORY (MIZKAN HOLDINGS JAPAN)

食品废水有机负荷高,波动性大,常规生物膜法处理工艺复杂且成本较高。采用加入玄武岩纤维(BF)填料及生物处理剂(SE-2)的新型生物接触氧化处理工艺,在日本株式会社Mizkan Holdings美浓加茂工厂开展食品废水处理试验评价。试验结果表明:该新型工艺中BF填料可形成球形“生物巢”,在较低DO(0.5 mg/L左右)条件下可实现COD、TN和TP的稳定去除,出水质量浓度分别在20,10,1 mg/L以下,去除率均达到95%以上,满足排放要求。与原工艺相比,该工艺的剩余污泥产量可减少20%以上,整体处理费用降低10%~30%。该工艺具有一定的应用和推广价值。

Food wastewater has high organic load and is usually treated by multi-stage contact oxidation and biofilm method.However, the method is complex and costs high.In this study, the basalt fiber carrier and a biological treatment agent (SE-2) were used to design a novel biological contact oxidation treatment process.The process was applied in Mizkan Holdings factory in Japan to evaluate the treatment efficiency.The results showed that the basalt fiber carrier could form a spherical “biological nest” in the new process.Nitrogen and phosphorus were effectively removed even under low dissolved oxygen content.COD, TN and TP in the effluent could be as low as 20, 10 and 1 mg/L, with removal rate higher than 95%, which could meet the requirements of discharge.The excess sludge volume could be reduced by more than 20%, and the overall treatment cost was reduced by 10%~ 30%.This study showed that the new process has great potential in the application in wastewater treatment field.