摘要
利用连续流2450MHz的电磁波污泥脱水装置,对2种不同的污泥进行均匀性试验,得到加载功率270W、加载时间200s、加载泥量150mL工况最优.该工况下,污泥离心含水率、沉降含水率、SV分别由原泥的90.46%、96.35%、88%下降到87.32%、95.55%、76%,比阻由2.37×109m/kg升高至1.22×1010m/kg,在同等离心条件下,经过2450MHz电磁波处理的污泥体积比不经电磁波处理的体积减少了25%.加载后,TN、TP、SCOD的最大溶出倍数分别达到了17.69、9.50和40.11,EPS降低61.9%,与现有的微波加载实验结果对比发现,在原泥比阻值较低情况下,连续流状态下比阻值未降反增,但污泥胞内物质的溶出倍数明显更大,能有效降低EPS,改善污泥脱水性能,表明了2450MHz电磁波动态污泥脱水的效果更好.
The optimal condition of continuous inflow sludge dewatering with 2450MHz electromagnetic wave was examined by the homogeneity tests with two different sludge. Based on the test, the system was optimally operated under the power of 270W, time of 200s and sludge loading of 150mL. Under the optimal condition, the centrifugal water content, settled water content and SV of the excess sludge dropped from 90.46%, 96.35%, 88% to 87.32%, 95.55%, 76% respectively. SRF increased from 2.37×109to 1.22×1010m/kg, and the volume of sludge was 25% less than those which were operated without 2450MHz electromagnetic wave. In addition, the biggest solubilization mulriple of TN, TP and SCOD was 17.69, 9.50 and 40.11 respectively, while EPS of sludge decreased 61.9%. To sludge of low SRF, as compared with other existed experiments, SRF didn＇t decrease but increase, while the solubilization ratio of intracellular substance was much higher, and EPS decreased obviously simultaneously with better sludge dewaterability. In summary, dynamic continuous inflow sludge dewatering was better than static ones with 2450MHz electromagnetic wave.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2014年第8期2024-2029,共6页
China Environmental Science
基金
国家自然科学基金资助项目(51108360和51208397)
湖北省自然基金项目(2011CDB428)
中央高校基本科研业务费专项资金资助(2013-IV-031和2013-ZY-062)
关键词
连续流
2450MHz电磁波
动态污泥脱水
均匀性试验
溶出效果
continuous inflow： 2450MHz electromagnetic wave
dynamic sludge dewatering
homogeneity test： solubilization effect
