城市污水处理厂污泥资源化利用技术进展

针对目前污水厂污泥传统处理方法存在的不足与弊端 ,提出污泥资源化利用技术是今后污泥最终处置的根本方式 ,并就目前研究的污泥热解制油技术、制取燃料技术、堆肥土地利用技术和热解制取吸附剂技术等主要的资源化利用技术进行了综述。     

SBR系统中同步硝化反硝化好氧颗粒污泥的培养

采用人工配制的模拟生活污水,研究序批式反应器(SBR)中好氧颗粒污泥的培养.实验结果表明:通过对进水碳源进行调控,反应器中形成了高活性具有同步硝化反硝化能力的好氧颗粒污泥,反应器中COD和NH₃-N的去除率分别为74.0%～92.8%和82.3%～98.5%.颗粒污泥的粒径一般为0.5～1.0mm,MLSS达到4.5g·L^-1以上,SVI值约为32.5,其有效生物量及脱氮性能远远高于一般的好氧活性污泥.     

Unveiling the recycling characteristics and trends of spent lithium-ion battery: a scientometric study

Environmental Science and Pollution Research - The recycling of spent lithium-ion batteries (LIBs) is both essential to sustainable resource utilization and environmental conservation. While spent...     

Fabrication of Bi-Bi3O4Cl plasmon photocatalysts for removal of aqueous emerging contaminants under visible light

Photocatalytic oxidation of emerging contaminants (ECs) in water has recently gained extensive attentions. In this study, bismuth oxychloride-based plasmon photocatalysts (Bi-Bi₃O₄Cl) exhibiting high performance were successfully developed by reducing Bi³⁺ on the surface of Bi₃O₄Cl. Consequently, the photocatalysts were used to remove ECs from water. The effects of developmental process and Bi metal plasmon resonance on the photoelectric performances of Bi-Bi₃O₄Cl were investigated through a series of characterizations. The UV-vis diffuse reflection and photoluminescence spectra revealed that the light absorption range of the photocatalyst gradually increased and the electron recombination rate gradually decreased with the introduction of Bi metals. The optimal removal rates of ciprofloxacin and tetrabromobisphenol A by Bi-Bi₃O₄Cl were 93.8% and 96.4%; the respective reaction rate constants were 5.48 and 4.93 times higher than that of Bi₃O₄Cl. The mechanism study indicated that main reactants in the photocatalytic system were •O₂⁻ radicals and photogenerated holes, and the existence of oxygen vacancies and Bi metals promoted electron transfer in photocatalyst. In conclusion, this research produces a novel, green, highly efficient, and stable visible light photocatalyst for the removal of ECs from water.