污泥厌氧消化在游离氨调控下强化磷与有机物释放的作用效果  

Effect of sludge anaerobic digestion on enhanced release of phosphorus and organic matter under the control of free ammonia

作　　者：郭新宇 孙广垠 孙观来 林新宇 郁达伟[2,3] 魏源送[2,3] GUO Xinyu;SUN Guangyin;SUN Guanlai;LIN Xinyu;YU Dawei;WEI Yuansong(School of Energy and Environmental Engineering,Hebei University of Engineering,Handan 056038,China;China Laboratory of Water Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China;State Key Joint Laboratory of Environmental Simulation and Pollution Control,Research Center of Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China)

机构地区：[1]河北工程大学能源与环境工程学院,邯郸056038 [2]中国科学院生态环境研究中心水污染控制实验室,北京1000853 [3]中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室,北京100085

出　　处：《环境工程学报》2024年第2期569-577,共9页Chinese Journal of Environmental Engineering

基　　金：国家重点研发计划项目(2022YFC3203102)。

摘　　要：基于污泥资源化与能源化的目的,采用游离氨调控的方式,利用系统中有机质提高沼气中甲烷体积分数的同时分析系统中磷浓度和形态的变化情况。结果表明,与空白阶段相比,游离氨调控后系统中溶解性蛋白、多糖质量浓度分别提升16.34%和26.43%;沼气中甲烷平均体积分数由73.61%提升至85.04%。通过三维荧光光谱(3D-EEM)和平行因子法(PARAFAC)分析两个反应阶段厌氧污泥上清液,芳香类蛋白质Ⅰ占比分别从35%、47%下降至29%与40%。这表明经过游离氨调控后芳香类蛋白质Ⅰ利用效果略有提高。在磷形态分析方面,游离氨调控使得进出水总磷、磷酸盐质量浓度分别提升948.64%、1219.35%、2254.55%与2280%,磷释放效果明显。根据X射线能量色散谱(EDS)、傅里叶红外光谱(FTIR)与X射线光电子能谱(XPS)分析结果表明,污泥中P主要与Fe、Al等金属元素以复合盐的形式存在;并在厌氧消化过程中发生了一定比例的磷形态转化。但游离氨诱导磷形态转化的机理仍需进一步探究。该研究结果进一步表明游离氨在厌氧消化过程中调控强化了有机物的利用效果,促进磷的释放与形态变化。该研究结果可为基于游离氨调控下有机物与磷的释放提供参考。For the purpose of sludge resource utilization and energy utilization,free ammonia was adopted to control the organic matter in the system to increase the volume fraction of methane in biogas while analyzing the changes of phosphorus concentration and form in the system.The experimental results showed that,compared with the blank stage,the mass concentration of soluble protein and polysaccharide in the system increased by 16.34% and 26.43% respectively,and the average volume fraction of methane in biogas increased from 73.61% to 85.04%.Through three-dimensional fluorescence spectroscopy(3D-EEM)and parallel factor method(PARAFAC)analysis of the two reaction stages of anaerobic sludge supernatant,the proportion of aromatic protein I decreased from 35% and 47% to 29% and 40%,respectively,indicating that the utilization of aromatic protein I was slightly improved after free ammonia regulation.In the aspect of phosphorus speciation analysis,the free ammonia regulation increased the total phosphorus and phosphate concentration in the water inlet and outlet by 948.64%,1219.35%,2254.55% and 2280%respectively,and the phosphorus release effect was obvious.According to the analysis results of X-ray energy dispersion spectroscopy(EDS),Fourier transform infrared spectroscopy(FTIR)and X-ray photoelectron spectroscopy(XPS),it was found that P mainly existed in the form of complex salt with Fe,Al and other metal elements in the sludge,and a certain proportion of phosphorus transformation occurred in the process of anaerobic digestion.However,furhter study was still needed to investigate the mechanism of phosphorus transformation induced by free ammonia.The results further showed that the regulation of free ammonia enhanced the utilization of organic matter and promoted the release and morphological change of phosphorus in the process of anaerobic digestion.The results of this study can provide a reference for the release of organic matter and phosphorus under the regulation of free ammonia.

关 键 词：污泥厌氧消化 游离氨调控 有机物释放 磷形态分析 资源化 

分 类 号：X703[环境科学与工程—环境工程]