分点进水高效除磷脱氮工艺理论及其应用

在分点进水高效除磷脱氮工艺(ECOSUNIDE)中,以统一动力学为理论基础,对动力学方程进行了分析,并对分点进水高效除磷脱氮工艺进行了工程性试验.研究表明,分点进水高效除磷脱氮系统比另一组未改造的A2/O系统可多处理水量4 500 m3/d,具有明显的水量优势。在低温、低碳源条件下,分点进水高效除磷脱氮系统出水BOD,COD和氨氮质量浓度分别稳定在6,25和1.9 mg/L左右,满足国家城镇污水处理厂污染物排放标准(GB 18918—2002)一级A出水标准,其他指标稳定达到一级B出水标准。通过对分点进水高效除磷脱氮与A2/O系统内的活性污泥进行镜检分析比较,发现分点进水高效除磷脱氮系统内的活性污泥性状较好,生物相更丰富,污泥菌胶团颜色较深,较紧密,絮体边缘较清晰,丝状菌明显.     

高压电脉冲技术对废弃电路板的破碎研究

利用高压脉冲技术对废弃电路板进行了破碎研究,并利用X射线荧光光谱仪(XRF)对破碎产物进行了表征.结果表明,高压电脉冲技术可利用废弃电路板中金属和非金属的电学特性差异对其进行破碎,同时还能够将大部分的铜都富集在较窄的粒度范围中,实现对金属的富集,有利于后续的分选和回收.高压电脉冲能够使废弃电路板沿铜箔与基材以及铜箔与阻燃剂层之间的界面发生解离,而这种解离是从界面的边缘开始发生的,并随着脉冲个数的增加逐渐地向界面内部延伸,直至界面彻底分离.经过400脉冲作用后,铜箔与基材以及铜箔与阻燃剂层之间实现了完全分离,电路板中97.92%的铜富集于粒径<2 mm的颗粒中,而这部分颗粒仅占电路板总质量的39.71%.     

The Unified Dynamic Theory and Its Engineering Research

The unified dynamic theory reveals the substrate-hased nonlinear growth phenomena.It means that the environment of high organism concentration and low substrate state is useful for the growth of weak floras.With ecological superior nitrification denitrification ( ECOSUNIDE ) technology,high sludge concentration by distributing influent to anaerobic and anoxic zones is carried out,and the ecological superiorities of nitrifiers,denitrifiers,and phosphate accumulating organisms (PAOs) get to be promoted.One of the anaerobic/anoxic/oxic(A/A/O) treatment lines of a sewage treatment plant with ECOSUNIDE technology for further investigation on the nutrient removal efficiency is reformed.The advantages of ECOSUNIDE,such as high efficiency and saving energy,are well demonstrated,even under the condition of low temperature (about 15℃) and carbon-resource (C/N ratio lower than 2.5 ).In ECOSUNIDE system,the effluent indexes as biochemical oxygen demand (BOD),chemical oxygen demand (COD),and NH3-N reach the Class I-A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant ( GB18918-2002 ),and suspended substance ( SS ),total nitrogen( TN),and total phosphorus(TP) meet the Class I -B criteria.While the effluent qualities of A/A/O system only reach the secondary discharge standard.Through the comparison on the sludge character of ECOSUNIDE system with A/A/O,more abundant biofacies,darker and more intense zoogioea,more obvious filamentous bacterium,and clearer floes edges in ECOSUNIDE system are found.