Wang Jiamei, Chai Tian, Chen Xin
College of Environmental Science & Engineering, Xiamen University of Technology, Xiamen 361024, China.
Microorganisms. 2023 Dec 18;11(12):3003. doi: 10.3390/microorganisms11123003.
This study investigated the effects of single Fenton and Fenton and UV combined processes on the cracking degree of anaerobic sludge under the same conditions. The optimal experimental conditions were obtained by repeated determination of Fe dosage, HO dosage and reaction time, so as to achieve the maximum cracking of sludge. In addition, this study applied three-dimensional fluorescence spectrum analysis technology to analyze the organic matter leached from the treated sludge, and different regions of the three-dimensional fluorescence spectra were analyzed and compared for each treatment condition. Repeated experiments showed that the optimal conditions for Fenton are a pH of 3, reaction time of 40 min, 1.4 g/L of Fe and 9 g/L of HO. The Fenton process cracking yielded a protein concentration of 0.66 mg/L and sCOD of 5489 mg/L, and the UV-Fenton pretreatment yielded a protein concentration of 0.74 mg/L and sCOD of 5856 mg/L. The sludge particle size was reduced from the original 54.52 mm to 40.30 mm and 36.37 mm, respectively. In addition to these parameters, it was also demonstrated that the Fenton process has a strong cracking effect on sludge by indicators such as the SEM and sludge water content and that UV irradiation can play a role in assisting and helping sludge cracking.
本研究在相同条件下考察了单一芬顿法以及芬顿与紫外线联合法对厌氧污泥破解程度的影响。通过反复测定铁剂量、过氧化氢剂量和反应时间来获得最佳实验条件，以实现污泥的最大破解。此外，本研究应用三维荧光光谱分析技术分析处理后污泥中浸出的有机物，并对每种处理条件下三维荧光光谱的不同区域进行分析和比较。反复实验表明，芬顿法的最佳条件为pH值3、反应时间40分钟、铁含量1.4 g/L和过氧化氢含量9 g/L。芬顿法破解产生的蛋白质浓度为0.66 mg/L，溶解性化学需氧量为5489 mg/L，紫外线 - 芬顿预处理产生的蛋白质浓度为0.74 mg/L，溶解性化学需氧量为5856 mg/L。污泥粒径分别从原来的54.52毫米减小到40.30毫米和36.37毫米。除了这些参数外，扫描电子显微镜和污泥含水量等指标还表明芬顿法对污泥具有很强的破解作用，紫外线照射可起到辅助和帮助污泥破解的作用。
