在(35±1)℃条件下,采用高效厌氧反应器对青岛啤酒股份有限公司的生产废水进行处理,研究了厌氧反应器的启动和运行情况,分析了回流比、温度和上升流速等因素对反应器的影响。结果表明,厌氧反应器的容积负荷可达21 kg COD/(m^3·...在(35±1)℃条件下,采用高效厌氧反应器对青岛啤酒股份有限公司的生产废水进行处理,研究了厌氧反应器的启动和运行情况,分析了回流比、温度和上升流速等因素对反应器的影响。结果表明,厌氧反应器的容积负荷可达21 kg COD/(m^3·d),COD去除率稳定在80%以上,出水挥发酸质量浓度低于350 mg/L,平均每去除1 kgCOD产生0.26 m^3沼气。启动结束后,颗粒污泥的平均沉降速度由40.3 m/h提高到73.4 m/h,污泥密度由0.78 g/cm^3升高至1.02 g/cm^3,0.5～1.5 mm粒径的颗粒污泥占66%。同时,在25℃的运行条件下反应器的容积负荷降至9 kg COD/(m^3·d),温度升高后反应器的运行可以较快得到恢复。展开更多
As a support material, zeolite can be used to promote the granulation process due to its high settable property and the ability to retain biomass on its surface. The present paper reports on the influence of zeolite a...As a support material, zeolite can be used to promote the granulation process due to its high settable property and the ability to retain biomass on its surface. The present paper reports on the influence of zeolite addition on the hydrodynamic behavior of an expanded granular sludge bed reactor（EGSB）. Different models were applied to fit the flow pattern and to compare EGSB hydrodynamic performance with and without the addition of zeolite. The experimental data fit the tanks in a series model for zeolite bed height of 5 cm and upflow velocity of 6 m/hr.Higher axial dispersion degree（D/uL） was obtained at lower heights of zeolite. The real hydraulic retention time（HRTr） was increased with both increased zeolite bed height and increased upflow velocity. The short-circuit results for 5 cm of zeolite bed and 6, 8 and 10 m/hr upflow velocity were 0.3, 0.24 and 0.19 respectively, demonstrating the feasibility of using zeolite for a proper hydrodynamic environment to operate the EGSB reactor. The presence of zeolite resulted in the higher percentage values of dead zones, ranging from 12% to 24%.Zeolite addition exerted a positive effect on the hydrodynamics pattern for this technology being advantageous for the anaerobic process because of its possible contribution to better biofilm agglomeration, granule formation and substrate-microorganism contact.展开更多
针对传统液固流化床对难选粗煤泥分选效果差的问题,构建了三产品液固流化床为主的试验系统,对难选粗煤泥的逐步分离过程进行研究。开展了不同参数条件下的单因素试验,探索了物料在下分选室初步分离及上分选室再次分离的分选过程,并将试...针对传统液固流化床对难选粗煤泥分选效果差的问题,构建了三产品液固流化床为主的试验系统,对难选粗煤泥的逐步分离过程进行研究。开展了不同参数条件下的单因素试验,探索了物料在下分选室初步分离及上分选室再次分离的分选过程,并将试验结果进行对比分析。研究结果表明:床层压力及上升水流对物料的分离分选影响显著,当下分选室床层压力12 k Pa、上升水量0.4 m3/h以及上分选室床层压力5 k Pa、上升水量0.1 m3/h时,尾煤灰分最高,精煤灰分最低,难选粗煤泥的分离分选效果最好。展开更多
基金CAPES for financial support with the project 117/11
文摘As a support material, zeolite can be used to promote the granulation process due to its high settable property and the ability to retain biomass on its surface. The present paper reports on the influence of zeolite addition on the hydrodynamic behavior of an expanded granular sludge bed reactor（EGSB）. Different models were applied to fit the flow pattern and to compare EGSB hydrodynamic performance with and without the addition of zeolite. The experimental data fit the tanks in a series model for zeolite bed height of 5 cm and upflow velocity of 6 m/hr.Higher axial dispersion degree（D/uL） was obtained at lower heights of zeolite. The real hydraulic retention time（HRTr） was increased with both increased zeolite bed height and increased upflow velocity. The short-circuit results for 5 cm of zeolite bed and 6, 8 and 10 m/hr upflow velocity were 0.3, 0.24 and 0.19 respectively, demonstrating the feasibility of using zeolite for a proper hydrodynamic environment to operate the EGSB reactor. The presence of zeolite resulted in the higher percentage values of dead zones, ranging from 12% to 24%.Zeolite addition exerted a positive effect on the hydrodynamics pattern for this technology being advantageous for the anaerobic process because of its possible contribution to better biofilm agglomeration, granule formation and substrate-microorganism contact.
文摘针对传统液固流化床对难选粗煤泥分选效果差的问题,构建了三产品液固流化床为主的试验系统,对难选粗煤泥的逐步分离过程进行研究。开展了不同参数条件下的单因素试验,探索了物料在下分选室初步分离及上分选室再次分离的分选过程,并将试验结果进行对比分析。研究结果表明:床层压力及上升水流对物料的分离分选影响显著,当下分选室床层压力12 k Pa、上升水量0.4 m3/h以及上分选室床层压力5 k Pa、上升水量0.1 m3/h时,尾煤灰分最高,精煤灰分最低,难选粗煤泥的分离分选效果最好。
