海绵热解炭固定化微生物吸附-降解餐饮废水中油脂的研究  

Adsorption-degradation of oil in catering wastewater by the microorganism immobilized on sponge pyrolytic carbon

作　　者：马淑雯 刘鑫 周小琴 方晓波[1] 郑华宝 毛浩楠 杨雨 孟祺绅 张成 MA Shuwen;LIU Xin;ZHOU Xiaoqin;FANG Xiaobo;ZHENG Huabao;MAO Haonan;YANG Yu;MENG Qishen;ZHANG Cheng(College of Environment and Resources,Zhejiang A&F University,Hangzhou 311300,Zhejiang,China)

机构地区：[1]浙江农林大学环境与资源学院,浙江杭州311300

出　　处：《浙江农林大学学报》2023年第2期293-303,共11页Journal of Zhejiang A&F University

基　　金：国家级大学生创新创业训练计划项目(202110341022);浙江省重点研发计划项目(2021C03190);浙江省自然科学基金资助项目(LY15D010005);浙江农林大学科研发展基金资助项目(2034020096)。

摘　　要：【目的】随着餐饮行业的迅速发展,餐饮废水油脂对环境的危害日益严重,因此对餐饮废水油脂的治理刻不容缓。【方法】以废弃海绵为原料,经热解炭化制得吸附性能良好的海绵热解炭(SPCx,x为热解温度),利用冷场发射扫描电子显微镜、傅里叶变换红外光谱和X射线光电子能谱对其形貌、结构等理化性质进行表征。利用SPCx吸附废水中大豆油,研究了热解温度、废水pH和温度等对吸附性能的影响;分析了SPC600吸附剂的吸附动力学和吸附等温线,采用Langmuir和Freundlich模型对数据进行分析。基于此,探究了SPC600固定化微生物对模拟废水和实际废水中油脂的吸附-降解规律。【结果】海绵热解炭(SPC600)具有丰富的“网络”结构和断裂分支,且表面含有大量的羟基、羰基和醚键等含氧官能团,进而提高了其对油脂吸附和微生物固定能力。优化的SPC600,在pH7和吸附温度30℃时,吸附容量高达8 093.1 mg·g-1。吸附过程符合准二级动力学方程,且是以化学吸附为主的放热过程。将筛选的降解油脂菌株与SPC600制成固定化微生物吸附剂,对实际油脂废水的降解率可达67.6%,比游离菌株和游离菌株+SPC600分别平均高11.0%和14.4%。【结论】采用海绵热解炭固定化微生物技术,在稳定降解菌株的同时提高了油脂降解率,实现“以废治废”,避免二次污染,具有较好的应用前景。[Objective]The objective of this study is to explore the effective treatment of catering wastewater,which has become increasingly harmful to the environment with the rapid development of catering industry.[Method]Sponge pyrolytic carbon(SPCx)with good adsorption performance was prepared from waste sponge by pyrolysis and carbonization.The physical and chemical properties such as the morphology and structure of the materials were characterized by cold field emission scanning electron microscopy,Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy.Through the adsorption of soybean oil in wastewater by SPCx,the effects of pyrolysis temperature,wastewater pH and temperature on the adsorption performance were studied.The adsorption kinetics and adsorption isotherm of SPC600 adsorbent were analyzed,and the Langmuir and Freundlich models were used to analyze the data.Based on this,the oil adsorptiondegradation law of SPC600 immobilized microorganisms in simulated wastewater and actual wastewater was explored.[Result]Sponge pyrolytic carbon(SPC600)had abundant“network”structure and fracture branches,and contained a large number of hydroxyl,carbonyl,ether bonds,and other oxygen-containing functional groups on its surface,which improved its ability to adsorb oil and immobilize microoganism.The optimized SPC600 had an adsorption capacity of 8093.1 mg·g^(−1) at pH 7 and adsorption temperature of 30℃.The adsorption process of oil conformed to the pseudo-second-order kinetic equation,and was an exothermic process dominated by chemical adsorption.The screened oil-degrading strains and SPC600 were made into immobilized microbial adsorbents,and the degradation rate of actual oil wastewater reached 67.6%,which was 11.0%and 14.4%higher than that of free strain and free strain+SPC600 respectively.[Conclusion]The sponge pyrolytic carbon immobilized microbial technology can stabilize the degrading strain and improve the oil degradation rate,so as to achieve the effect of“treating waste with waste”a

关 键 词：海绵热解炭 固定化微生物 吸附能力 微生物降解 油脂废水 

分 类 号：X703.5[环境科学与工程—环境工程]