生物滤池工艺系统处理微污染水源水中试试验
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摘要
对以污泥碳化载体为滤料的生物滤池系统工艺处理微污染水源水的处理性能进行了试验研究,试验结果表明:
以NH_4~+-N去除率达到60%以上作为判断生物膜是否成熟的依据。当生物膜成熟后,生物滤池对CODMn、NH_4~+-N和浊度均有良好的去除效果,最高去除率分别可达41.70%,79.89%和84.11%。
在空床接触时间为12min、气水比为1.0、水温为20.2℃～26.5℃、pH:6.8～7.9,且系统稳定运行时,以污泥碳化载体为滤料的生物滤池工艺系统对CODMn、UV254、NH_4~+-N、NO2--N、浊度和色度的平均去除率分别为46.19%,32.34%,80.48%,83.26%,87.69%和73.56%。
在相同的试验条件下,通过应用生物滤池的性能评价指标,以CODMn、NH_4~+-N、浊度和色度四个指标作为评价对象,得出了以污泥碳化载体为滤料的生物滤池性能最优。
分析了空床接触时间、气水比、温度、有机容积负荷和NH_4~+-N容积负荷对生物滤池处理性能的影响,以污泥碳化载体为滤料的生物滤池处理微污染水源水的适宜工艺条件为:进水CODMn浓度<6mg/L,NH_4~+-N浓度<2mg/L,EBCT为12～15min,气水比为1.0左右。通过采用正交试验分析得出,对于CODMn的去除,各因素影响程度的大小依次是:气水比,EBCT,进水浓度。对于NH_4~+-N的去除,各因素影响程度的大小依次是:EBCT、气水比、进水浓度。研究了生物滤池运行性能与滤层高度的关系。结果表明:生物滤池对CODMn、浊度和色度的去除作用主要发生在滤层0～40cm范围内;对UV254的去除作用主要发生在0～60cm范围内;对NH_4~+-N的去除作用主要发生在20cm～60cm范围内。滤料高度为100cm能满足出水的要求。
在空床接触时间为12min、气水比为1.0、水温为20.2～26.5℃时,生物滤池对沉淀出水中铁、锰的平均去除率分别为81.53%和79.17%。当气水比为1.0～1.5时,生物滤池对铁锰能同时达到最佳处理效果;水温对锰的影响较为显著;生物滤池对铁锰的去除作用分别主要发生在0～40cm和20～80cm范围内。铁的去除主要以化学氧化作用为主,而锰的去除主要依靠的是生物作用。
The effect of Bio-filter System which uses carbonation sludge carrier removing pollutants from micro-polluted source water was studied. Research results were as follows.
It is appropriate to adopt ammonia nitrogen removal rate 60% as a basic mark to judge mature biofilm. After the biofilm formation, Bio-filter had a high rate on removing CODMn, NH_4~+-N and turbidity. The maximum removal rate of CODMn, NH_4~+-N and turbidity were 41.70%, 79.89% and 84.11%.
When the Empty bed contact time (EBCT) was 12 min, the gas to water ratio (G/W) was 1.0, the temperature was 20.2℃～26.5℃, pH was 6.8～7.9 and the system was operated steadily, the removal effect of pollutants by Bio-filter System which uses carbonation sludge carrier were as follows: the average removal rate of CODMn, UV254, NH_4~+-N, NO2--N, turbidity and chroma were 46.19%, 32.34%, 80.48%, 83.26%, 87.69% and 73.56% respectively.
Under the same condition, CODMn, NH_4~+-N turbidity and chroma were used as the evaluation objects by the use of performance evaluation index of Bio-filter. It can be conclued that the performance of Bio-filter System using carbonation sludge carrier was best. Influence of EBCT, G/W, water temperature, organic volumatric loading, NH_4~+-N volume loading on Bio-filter system performance were analyzed. When the CODMn was less than 6mg/L,the NH_4~+-N volume loading was less than 2mg/L, EBCT was 12 min and G/W was 1.0, the Bio-filter could have a better effect. By use of orthogonal, the result showed that the degree of each factor were G/W, EBCT and volumatric loading on the CODMn removal. The degree of each factor were EBCT, G/W and volumatric loading on the NH_4~+-N removal.
The relation between operation characteristics and filter height of the Bio-filter was studied. The removal of CODMn turbidity and chroma were mainly occurred in 0-40cm. The removal of UV254 was mainly occurred in 0-60cm. The removal of NH_4~+-N was mainly occurred in 20-60cm. Thus the Bio-filter height of 100cm used can make effluent meet the requirement.
When EBCT was 12 min, G/W was 1.0 and the temperature was 20.2℃～26.5℃, the average removal rate of iron and manganese were 81.53% and 79.17%. When the G/W was 1.0-1.5, the Bio-filter system had a better removal rate on iron and manganese at the same time. The temperature influenced on manganese removal significantly. Iron and manganese removal were mainly occurred in 0-40cm and 20-80cm. The Fe and Mn removal mechanism were mainly chemical oxidation and biological effect respectively.
以NH_4~+-N去除率达到60%以上作为判断生物膜是否成熟的依据。当生物膜成熟后,生物滤池对CODMn、NH_4~+-N和浊度均有良好的去除效果,最高去除率分别可达41.70%,79.89%和84.11%。
在空床接触时间为12min、气水比为1.0、水温为20.2℃～26.5℃、pH:6.8～7.9,且系统稳定运行时,以污泥碳化载体为滤料的生物滤池工艺系统对CODMn、UV254、NH_4~+-N、NO2--N、浊度和色度的平均去除率分别为46.19%,32.34%,80.48%,83.26%,87.69%和73.56%。
在相同的试验条件下,通过应用生物滤池的性能评价指标,以CODMn、NH_4~+-N、浊度和色度四个指标作为评价对象,得出了以污泥碳化载体为滤料的生物滤池性能最优。
分析了空床接触时间、气水比、温度、有机容积负荷和NH_4~+-N容积负荷对生物滤池处理性能的影响,以污泥碳化载体为滤料的生物滤池处理微污染水源水的适宜工艺条件为:进水CODMn浓度<6mg/L,NH_4~+-N浓度<2mg/L,EBCT为12～15min,气水比为1.0左右。通过采用正交试验分析得出,对于CODMn的去除,各因素影响程度的大小依次是:气水比,EBCT,进水浓度。对于NH_4~+-N的去除,各因素影响程度的大小依次是:EBCT、气水比、进水浓度。研究了生物滤池运行性能与滤层高度的关系。结果表明:生物滤池对CODMn、浊度和色度的去除作用主要发生在滤层0～40cm范围内;对UV254的去除作用主要发生在0～60cm范围内;对NH_4~+-N的去除作用主要发生在20cm～60cm范围内。滤料高度为100cm能满足出水的要求。
在空床接触时间为12min、气水比为1.0、水温为20.2～26.5℃时,生物滤池对沉淀出水中铁、锰的平均去除率分别为81.53%和79.17%。当气水比为1.0～1.5时,生物滤池对铁锰能同时达到最佳处理效果;水温对锰的影响较为显著;生物滤池对铁锰的去除作用分别主要发生在0～40cm和20～80cm范围内。铁的去除主要以化学氧化作用为主,而锰的去除主要依靠的是生物作用。
The effect of Bio-filter System which uses carbonation sludge carrier removing pollutants from micro-polluted source water was studied. Research results were as follows.
It is appropriate to adopt ammonia nitrogen removal rate 60% as a basic mark to judge mature biofilm. After the biofilm formation, Bio-filter had a high rate on removing CODMn, NH_4~+-N and turbidity. The maximum removal rate of CODMn, NH_4~+-N and turbidity were 41.70%, 79.89% and 84.11%.
When the Empty bed contact time (EBCT) was 12 min, the gas to water ratio (G/W) was 1.0, the temperature was 20.2℃～26.5℃, pH was 6.8～7.9 and the system was operated steadily, the removal effect of pollutants by Bio-filter System which uses carbonation sludge carrier were as follows: the average removal rate of CODMn, UV254, NH_4~+-N, NO2--N, turbidity and chroma were 46.19%, 32.34%, 80.48%, 83.26%, 87.69% and 73.56% respectively.
Under the same condition, CODMn, NH_4~+-N turbidity and chroma were used as the evaluation objects by the use of performance evaluation index of Bio-filter. It can be conclued that the performance of Bio-filter System using carbonation sludge carrier was best. Influence of EBCT, G/W, water temperature, organic volumatric loading, NH_4~+-N volume loading on Bio-filter system performance were analyzed. When the CODMn was less than 6mg/L,the NH_4~+-N volume loading was less than 2mg/L, EBCT was 12 min and G/W was 1.0, the Bio-filter could have a better effect. By use of orthogonal, the result showed that the degree of each factor were G/W, EBCT and volumatric loading on the CODMn removal. The degree of each factor were EBCT, G/W and volumatric loading on the NH_4~+-N removal.
The relation between operation characteristics and filter height of the Bio-filter was studied. The removal of CODMn turbidity and chroma were mainly occurred in 0-40cm. The removal of UV254 was mainly occurred in 0-60cm. The removal of NH_4~+-N was mainly occurred in 20-60cm. Thus the Bio-filter height of 100cm used can make effluent meet the requirement.
When EBCT was 12 min, G/W was 1.0 and the temperature was 20.2℃～26.5℃, the average removal rate of iron and manganese were 81.53% and 79.17%. When the G/W was 1.0-1.5, the Bio-filter system had a better removal rate on iron and manganese at the same time. The temperature influenced on manganese removal significantly. Iron and manganese removal were mainly occurred in 0-40cm and 20-80cm. The Fe and Mn removal mechanism were mainly chemical oxidation and biological effect respectively.
引文
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