摘要
以实际废水为探究对象,建立序批式反应器,在中温环境(25℃)探究了磁性物质Fe_(3)O_(4)对生物脱氮除磷的影响,通过分析营养型污染的去除规律揭示Fe_(3)O_(4)使强化生物脱氮除磷的机制。结果表明,当Fe_(3)O_(4)的剂量为0.3 g/L时,污泥沉降指数下降至80 mL/g。Fe_(3)O_(4)促进胞外聚合物中蛋白质(PN)及多糖(PS)的含量,且当Fe_(3)O_(4)的剂量为0.7g/L,污泥中PN、PS的质量分数分别升高至116、68.7 mg/g,且w(PN)/w(PS)升高至1.68。Fe_(3)O_(4)同样提高COD、TN及TP的去除率。Fe_(3)O_(4)加速污泥颗粒化提高生物量,且为硝化反硝化细菌提供附着点。
A sequencing batch reactor was established to investigate the effect of magnetic material Fe_(3)O_(4) on biological nitrogen and phosphorus removal in a medium temperature environment(25 ℃), the practical wastewater as the research object. The mechanism of enhanced biological nitrogen and phosphorus removal by Fe_(3)O_(4) was revealed by analyzing the removal law of nutrient pollution. The results showed that when the dosage of Fe_(3)O_(4) was 0.3 g/L, the SVI decreased to 80 mL/g. Fe_(3)O_(4) promoted the content of protein(PN) and polysaccharide(PS) in extracellular polymer.When the dosage of Fe_(3)O_(4) was 0.7 g/L, the mass fraction of PN and PS in sludge increased to 116 mg/g and 68.7 mg/g, respectively, and w(PN)/w(PS)increased to 1.68. Fe_(3)O_(4) could also improve the removal rate of chemical oxygen demand(COD), total nitrogen(TN) and total phosphorus(TP). Fe_(3)O_(4) accelerated sludge granulation and improved biomass, and provided attachment point for nitrification and denitrification bacteria.
作者
杨晓贝
YANG Xiaobei(Shanxi Conservancy Technical Institute,Yuncheng 044004,China)
出处
《水处理技术》
CAS
CSCD
北大核心
2021年第6期80-83,共4页
Technology of Water Treatment
关键词
脱氮除磷
Fe_(3)O_(4)
沉降性
胞外聚合物
denitrification and dephosphorization
Fe_(3)O_(4)
Sedimentation
extracellular polymers
