摘要
采用连续流运行方式，将含NO3^--N的原水依次通过HABR（复合式厌氧折流板反应器）内添加木屑（第1系统）和硫磺颗粒（第2系统）的2个系统，在温度为（25±1）℃的条件下，将NO^--N容积负荷由72g／（m^3·d）逐渐提高至80和96g／（m^3·d），在不需投加传统型外加碳源的条件下实现了固相异养与单质硫自养的集成反硝化．结果表明：进水NO^--N容积负荷为96g／（m^3·d）时，系统NO3^--N总去除率达到99．0％，第1系统和第2系统对NO^--N的去除率贡献各为50．0％；系统出水P（CODMn）为5．74～10．05mg／L，P（S04^2-）为405～870mg／L，并且没有NH4^＋-N和NO^--N的积累．第1系统产生的碱度能部分中和第2系统内产生的酸，进水、第1系统、第2系统出水pH分别为7．5、7．5—7．6、6．5-7．2，使硫自养反硝化系统呈现出较强的pH平衡能力，不需外加石灰石调节碱度即可为反硝化细菌提供较适宜的中性生存环境．系统在pH平衡能力和NO^--N去除效果2个方面均表现出良好的协同作用，并且通过集成反硝化作用弥补了2个系统单独运行时反硝化过程效率低的缺点，较传统异养型生物反硝化降低了运行成本．
Solid-phase heterotrophic denitrification and sulfur autotrophic denitrification were successfully coupled in Hybrid Anaerobic Baffled Reactor （HABR） system without adding traditional carbon source. The sawdust and sulfur granules were filled in two systems of HABR respectively as the reactive medium for the removal of nitrate in raw water. In continuous operation, the effluent of the first system was treated by the second system while alkalinity produced by the first system can neutralized the acid produced in the second system. During this process, the water-bath temperature was （25 ＋ 1）℃ and the NO3 - -N volume loading of raw water varied as 72, 80, 96 g/（m3 .d）. The experimental results demonstrated that the removal efficieneies of NO3 - -N was 99. 0% without the accumulation of NH4 ＋ -N and NO2 - -N. The NO3 --N removal percentage of each system was 50. 0% , while the NOz --N volume loading was 96 g/（ m3. d）. The p（CODM,） , p（ SO42- ） of effluent were 5.74-10. 05, 405-870 mg/L. The integrated system had the capacity of pH balance, therefore the limestone for pH adjustment in sulfur autotrophie denitrification was not necessary in this combined process. The influent pH was 7.5, and the effluents of two systems were kept neutral at optimum operation conditions. In general, the HABR integrated system perfectly showed synergy in two aspects ： pH balance capacity and integrated denitrification effects. Compared with the conventional biological heterotrophic denitrification, the integrated system reduced costs and enhanced the denitrification efficiency.
出处
《环境科学研究》
EI
CAS
CSSCI
CSCD
北大核心
2014年第3期314-320,共7页
Research of Environmental Sciences
基金
国家自然科学基金项目(51108277)
辽宁省高等学校优秀人才支持计划项目(LJQ2012051)
辽宁省科学技术计划项目(2012225086)
关键词
复合式厌氧折流板反应器(HABR)
固相异养反硝化
单质硫自养反硝化
集成反硝化
hybrid anaerobic baffled reactor （HABR）
solid-phase heterotrophic denitrification
sulfur autotrophic denitriflcation
integrated denitrification
