A2/O工艺的改进

自20世纪70年代以来逐渐成为废水脱氮除磷主流工艺的A2/O工艺,因其构成复杂,受污泥龄、碳源、硝酸盐等因素的影响,造成脱氮与除磷的功能之间相互制约。而在A2/O工艺的基础上改良与优化的PASF、UCT和VIP等技术,克服了A2/O工艺部分固有缺陷,优化和提高了其处理能力。此外,随着废水脱氮除磷理论的深化研究,同步反硝化除磷、短程硝化/反硝化、厌氧氨氧化技术和同步硝化与反硝化等新技术也取得了较大进展,这些新理论与新技术为A2/O工艺高效、低耗和安全稳定的运行奠定了坚实基础。

Renovations of A2/O Processes

Because of its complex composing, the effect of the A~2/O process which has become the main technology of biological nutrient removal process since 1970s has been restricted by some factors such as sludge retention time, carbon source, nitrate content and so on. The PASF, UCT and VIP technologies which were optimized on the base of the A~2/O process had gotten over some of the A~2/O process's defectiveness, and improved the abilities of removing biological nutrient from waste water. Besides, along with the further improvement of biological nutrient removal process, the new technologies such as simultaneous nitrifying and de-nitrifying, short-time nitrifying and de-nitrifying, de-nitrifying removal of phosphorous and anaerobic ammonia oxidation have got access with great advancement. Those new technologies and theoretics will let the A~2/O process run in a high effect and low cost way.