CAJ | 학술논문

陕西省兴平市城市污水处理厂在国内首次引进加拿大VERTREATTM(简称VT)深井曝气工艺.该厂规模为5×10~4m~3/d,出水执行<城镇污水处理厂污染物排放标准>(GB18918-2002)的二级标准,实际出水水质达到一级B标准.VT工艺的主体反应器由两口直径为3.2 m、深为92 m的深井组成.整个VT生化系统的占地面积为4 400 m~2.深井反应器内的氧气利用率为65%～86%,并实现"一气多用":曝气除满足微生物新陈代谢需要外,还用于混合液搅拌、气提、后续气浮泥水分离等,大大节省了运行成本,处理电耗约0.8 kW·h/kgBOD_5.
합서성흥평시성시오수처리엄재국내수차인진가나대VERTREATTM(간칭VT)심정폭기공예.해엄규모위5×10~4m~3/d,출수집행<성진오수처리엄오염물배방표준>(GB18918-2002)적이급표준,실제출수수질체도일급B표준.VT공예적주체반응기유량구직경위3.2 m、심위92 m적심정조성.정개VT생화계통적점지면적위4 400 m~2.심정반응기내적양기이용솔위65%～86%,병실현"일기다용":폭기제만족미생물신진대사수요외,환용우혼합액교반、기제、후속기부니수분리등,대대절성료운행성본,처리전모약0.8 kW·h/kgBOD_5.
The VERTREATTM(VT)deep shaft aeration process was introduced by Xingping WWTP from Canada as its wastewater treatment process,firstly in China.The design capacity of this plant is 5×10~4m~3/d.The design effluent quality meets the second level criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant(GB 18918-2002).However,the first level B criteria are met in practice.The main body of VT consists of two shafts with diameter of 3.2 m and depth of 92 m.The area occupied by VT system is 4 400 m~2.The oxygen transfer efficiency reaches 65%to 86%.The aeration has many purposes:it can meet the requirements of microbial metabolism,mixing,air lifting,flotation for separation of sludge and so on.Therefore,the operation cost is signifi-cantly saved. The power consumption is 0.8kW·h/kgBOD_5.