摘要
针对丝状菌引起的污泥膨胀问题,将膨胀污泥接种在序批式光照反应器内,再接种不同比例的微藻,利用微藻黏附生长特性对膨胀污泥的沉降性能进行恢复。研究结果表明:在投加不同比例的微藻后,膨胀污泥的沉降性能恢复良好,污泥容积指数(SVI_(5))值达到14.98 mL/g,污泥粒径最大增长到103.36μm。恢复了沉降性能的污泥有较高的胞外聚合物质量比。此外,微藻的加入也提升了膨胀污泥的污染物去除性能,其对化学需氧量(COD)的去除率为73.0%,对氨氮(NH^(+)_(4)-N)的去除率为43.6%,对总无机氮(TIN)的平均去除率为37.7%,对总磷(TP)的去除率为84.2%。在膨胀污泥沉降性能恢复过程中,胞外聚合物中蛋白质的质量比最高上升至26.89 mg/g挥发性悬浮物(VSS),而多糖的质量比基本稳定在9.09 mg/g VSS左右。
In order to solve the problem of sludge bulking caused by filamentous bacteria,the bulking sludge was inoculated in the photo-sequencing batch reactor. And different concentrations of microalgae were inoculated into reactors. The sedimentation performance of the bulking sludge was restored by the adhesion growth characteristics of microalgae.The results showed that after adding different concentrations of microalgae,the settlement performance of bulking sludge recovers well.The sludge volume index( SVI_(5)) reaches 14.98mL/g,and the maximum particle size of sludge increases to 103.36 μm.The sludge that restores sedimentation has higher extracellular polymeric substances( EPS) content. In addition, the addition of microalgae also improves the pollutant removal performance of expanded sludge.The removal rate of ckemical oxygen demand(COD) is 73.0%,the removal rate of ammonia nitrogen is 43.6%,the average removal rate of total inorganic nitroged( TIN) is 37. 7%,and the removal rate of TP is 84. 2%. During the recovery of the sedimentation performance of expansive sludge,the protein content in EPS increases to 26.89 mg/g volatile suspended solids(VSS),while the polysaccharide content is basically stable at about 9.09 mg/g VSS.
作者
王海蓝
肖俊绚
陈威
王宗平
WANG Hailan;XIAO Junxuan;CHEN Wei;WANG Zongping(School of Urban Construction,Wuhan University of Science&Technology,Wuhan 430081,China;China Construction Third Engineering Bureau Group Co.,Ltd.,Wuhan 430064,China;School of Environmental Science&Engineering,Huazhong University of Science&Technology,Wuhan 430074,China)
出处
《河南科技大学学报（自然科学版）》
CAS
北大核心
2023年第1期84-89,M0007,共7页
Journal of Henan University of Science And Technology:Natural Science
基金
国家自然科学基金项目(51808416)。
关键词
膨胀污泥
微藻
污泥膨胀恢复
黏附生长
bulking sludge
microalgae
sludge bulking recovery
adhesion growth
