内循环塔式好氧颗粒污泥反应器处理玉米淀粉生产废水

A Novel Internal Recycle Aerobic Granular Sludge Reactor Treatment Corn Starch Wastewater

研究采用一种新型内循环塔式好氧颗粒污泥反应器,以城市污水处理厂剩余污泥作为接种污泥,培养出了好氧颗粒污泥,其粒径可达3.50 mm左右,污泥浓度在1.0~2.5 g/L之间,污泥沉降比保持在10%~15%之间,好氧颗粒污泥的性状稳定.采用该反应器处理玉米淀粉厂厌氧膨胀颗粒污泥床反应器出水,结果表明:该反应器对玉米淀粉厌氧预处理废水具有较好的处理效果,在曝气量为0.12 L/min,进水流量为30 m L/min,进反应器污水COD为800~950 mg/L时,其COD去除率可达90%以上,而且具有较明显的脱氮效果,其硝态氮去除率可达90%以上.

In this study,a novel internal recycle aerobic granular sludge reactor （IRAGS） has been established.The aerobic granular sludge （AGS） had been cultivated in a novel aerobic granular sludge wastewater treatment plant using excess sludge of sewage plant as seed sludge.Particle size of AGS is about 3.50 mm and the concentration of sludge is between 1.0 to 2.5 g/L.The settling velocity （SV） is within the range of 10-15 % and the state of AGS is maintaining stability.The outlet of expanded granular sludge blanket reactor （EGSB） which pretreatment corn starch wastewater was treated by IRAGS in this study.The experimental results showed that IRAGS reactor had high degradation efficiency.The removal rate of COD,nitrate nitrogen and nitrite nitrogen can reach 90 %,when the aeration rate was 0.12 L/min,the influent flow rate was 30 mL/min and the COD of the inlet wastewater was not above 950 mg/L.