摘要
利用基于沉降速度的选择压筛分轻质和重质污泥,设计并建立了一种新型的颗粒-絮体污泥淘洗器,以实际印染废水为处理对象,成功实现了连续流好氧污泥颗粒化及高效污染物去除,有效提高了污水处理效率。试验结果表明,经过190 d的试验培养,粒径大于200μm好氧颗粒污泥占比达到72.7%,SVI_(30)为由接种污泥的160 mL/g下降至49.81 mL/g,与原染厂污泥相比降低了68.89%;出水COD在95~120 mg/L,氨氮在0.3~0.8 mg/L,总氮在7.5~11 mg/L,色度在20~30倍,处理效果得到强化;水力停留时间由36 h缩短至24 h,日处理量增加50%,处理效率得到提升。同时,发现颗粒污泥具有良好的自修复能力和抗冲击负荷能力。微生物测序分析表明,好氧颗粒污泥中富集的NS9_marine_group、Thauera和Hyphomonas对印染废水中COD、色度以及氮的脱除具有重要作用。
A novel granule-floc sludge elutriator was designed and constructed,utilizing selective pressure derived from settling velocity to separate light and heavy sludge.With actual dyeing wastewater as the treatment target,this system successfully achieved continuous-flow aerobic sludge granulation with efficient pollutant removal,thereby effectively enhancing wastewater treatment efficiency.Experimental results indicated that after 190 days of operation,the proportion of aerobic granular sludge with a particle size>200μm reached 72.7%,and the 30-minute sludge volume index(SVI_(30))decreased from 160 mL/g to 49.81 mL/g—68.89%lower than the original sludge from the dyeing plant.Effluent chemical oxygen demand(COD)concentration was 95~120 mg/L,ammonia nitrogen was 0.3~0.8 mg/L,total nitrogen(TN)was 7.5~11 mg/L,and chromaticity was 20~30-fold,indicating enhanced treatment performance.The hydraulic retention time(HRT)was shortened from 36 h to 24 h,with the daily treatment capacity increasing by 50%and treatment efficiency improving.Meanwhile,the granular sludge exhibited good self-healing capacity and shock load resistance.Microbial sequencing analysis revealed that NS9_marine_group,Thauera,and Hyphomonas—enriched within the aerobic granular sludge—contributed significantly to the removal of COD,color,and nitrogen in dyeing wastewater.
作者
郦藤恺
秦庆东
李建
LI Tengkai;QIN Qingdong;LI Jian(School of Civil Engineering,Southeast University,Nanjing 210096,China;Monash University of Joint Graduate School,Southeast University,Suzhou 215123,China;Suzhou Dadao Environmental Protection Technology Co.,Ltd.,Suzhou 215228,China)
出处
《水处理技术》
北大核心
2026年第3期139-145,共7页
Technology of Water Treatment
基金
2023年度(上半年)江苏省土木建筑学会科研课题“现有污水处理厂原位升级提标改造生化工艺新技术中试研究”。
关键词
好氧颗粒污泥
印染废水
连续流
生物降解
微生物菌群
aerobic granular sludge
textile dyeing wastewater
continuous flow
biodegradation
microbial population
