摘要
采用轻质陶粒作为生物滤池滤料处理硝酸盐微污染地表水,研究了反硝化生物滤池间歇接种挂膜法的启动速度和效果、m(C)/m(N)(m(COD)/m(NO3--N))、水力负荷和硝酸盐氮负荷对系统反硝化效能的影响。结果表明,生物滤池可以作为处理硝酸盐微污染地表水的有效手段,当外加甲醇为碳源,水温大于20℃、m(C)/m(N)>5、水力负荷为1.43m3/(m.2h)、系统NO3--N去除率可接近100%;当水温为(14±1)℃,将水力负荷提高到2.87 m3/(m2.h),系统NO3--N去除率能达到90%,NO2--N积累低于0.6 mg/L,系统对水力负荷变化显示出较强的适应性;当水温为(30±1)℃、m(C)/m(N)=6:1,随着NO3--N负荷增加时,3组试验的NO3--N去除率相近,且系统反硝化反应遵循1级反应动力学规律。
Light pottery pellet was used as biological filter medium to treat nitrate micro-polluted surface water, and the effects of influent C/N, nitrate load and hydraulic load on de-nitrification performance were investigated. Experimental results indicated that biological filter could be an effective measure of treating nitrate micro-polluted surface water. When methanol was used as a carbon source, influent temperature was above 20 ℃, influent m（C）/m（N） increased to above 5, and hydraulic load was 1.43 m3/（m2.h）, nitrate removal rate could approach about 100%. Bio-filter can adapt to the changing of hydraulic load at some extent. When influent temperature was （14±1） ℃ and hydraulic load was increased to 2.87 m3/（m2·h）, nitrate removal rate can approach about 90%, and nitrite accumulation was below 0.6 mg/L. When ra（C）/m（N）=6, and temperature was （30±1） ℃, increasing the influent nitrate load has little impact on nitrate removal rate, and the de-nitrification reaction followed first-order kinetic in this system.
出处
《水处理技术》
CAS
CSCD
北大核心
2013年第2期98-101,共4页
Technology of Water Treatment
基金
国家水体污染控制与治理科技重大专项(2012ZX07101-007)
关键词
生物滤池
反硝化
C
N
水力负荷
硝酸盐氮负荷
biological filter
de-nitrification
C/N
nitrate load
hydraulic load
