摘要
采用升流式曝气生物滤池（UBAF）去除源水中高含量的锰，研究生物滤池滤速和气水比对UBAF去除锰的效果的影响，同时确定最佳的反冲洗方式。结果表明，随着生物滤池滤速的降低，UBAF工艺对锰的去除效率增高，滤速是该工艺除锰效果的决定性因素。生物滤池气水比越大除锰效果越好，但随着气水比的不断增大去除效果增长缓慢，考虑保证去除效率和曝气能适中，适宜的气水体积比为0．3。定期反冲洗对维持UBAF工艺的除锰效果有重要作用，该工艺适合的反冲洗周期为4～5d，反冲洗方式为先气冲3min，气冲洗强度为20L／（m^2·s），再气水联合冲15min，气、水冲洗强度分别为20、8L／（m^2·s），共18min。
The removal of high concentration of manganese from source water was performed by up flow biological aerated filter （UBAF）. The effect of biological filter velocity and gas water ratio on the manganese removal by UBAF was investigated, and the optimum backwashing method was determined. The results show that the biological filtration velocity is the decisive factor in the process, and the manganese removal efficiency increased with decrease the biological filtration velocity. The high gas water ratio was beneficial for manganese removal. However, the manganese removal was slowly increased with the further increase of gas and water ratio. Considering the removal efficiency and energy consuming, the most suitable gas water ratio was 0.3. In the craft ofUBAF, air washing should be firstly applied for 3 min with the strength of20L/（m^2·s）, and then gas-water washing should be used for 15 min with the strength of 20L/（m^2·s）, and 8L/（m^2·s）, respectively. And the backwash cycle could be prolonged to 4-5 d.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第4期67-69,共3页
Technology of Water Treatment
