Yan Hong, Cheng Zhen-min, Wang Ya-wei, Xiao Ben-yi, Wei Yuan-song, Liu Jun-xin
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Huan Jing Ke Xue. 2009 Dec;30(12):3639-44.
In this study, the releases of carbon, nitrogen and phosphorus from sludge treated by microwave irradiation were investigated by batch experiments at two microwave energy inputs (MEIs), 54 kJ and 108 kJ. The final temperatures of the treated samples at these two MEIs were about 56 degrees C and 90 degrees C, respectively. Results showed that the higher MEI was more helpful to release TC, TOC, TN and TP from sludge treated by microwave. The release rates of TC, TN and TP were doubled at the MEI of 108 kJ than that of 54 kJ, and their highest rates were 5.26%, 22.06% and 33.15%, respectively. The MLSS significantly affected releases of TOC, TC, TN, NH4+ -N, TP and ortho-PO4(3-). However, the microwave power (MWP) had no significant effect on these releases except IC. The normalization of these parameters, representing the energy efficiencies of treating sludge, clearly showed that the P (TP) was the highest and the P(IC) was the lowest. However, the average values of P(IC), P(NH4+ -N) and P(ortho-PO4(3-)) decreased at the same MISS concentration, respectively, about 67%, 73% and 56% when the MEI doubled from 54 kJ to 108 kJ.
在本研究中，通过批次实验，在54 kJ和108 kJ这两种微波能量输入（MEI）条件下，研究了微波辐照处理污泥过程中碳、氮和磷的释放情况。在这两种MEI条件下，处理后样品的最终温度分别约为56℃和90℃。结果表明，较高的MEI更有助于从微波处理的污泥中释放总碳（TC）、总有机碳（TOC）、总氮（TN）和总磷（TP）。在108 kJ的MEI条件下，TC、TN和TP的释放率比54 kJ时翻倍，其最高释放率分别为5.26%、22.06%和33.15%。混合液悬浮固体（MLSS）显著影响TOC、TC、TN、铵态氮（NH4+-N）、TP和正磷酸盐（ortho-PO4(3-)）的释放。然而，除无机碳（IC）外，微波功率（MWP）对这些释放没有显著影响。这些参数的归一化表示处理污泥的能量效率，清楚地表明磷（TP）最高，而P（IC）最低。然而，在相同的混合液悬浮固体浓度下，当MEI从54 kJ增加一倍至108 kJ时，P（IC）、P（NH4+-N）和P（ortho-PO4(3-)）的平均值分别下降了约67%、73%和56%。
