微生物燃料电池用于餐厨废水前处理的效能研究

发布时间：2018-03-14 01:08

本文选题：微生物燃料电池　切入点：餐厨废水　出处：《哈尔滨工业大学》2014年硕士论文　论文类型：学位论文

【摘要】：针对能源资源的匮乏和未经处理的餐厨垃圾排放量逐年递增等问题，本文主张将餐厨固体垃圾和餐厨废水分开处理，分别将这些很可观的资源转化为清洁的生物质能源，实现废弃物的双重利用。并着重研究单室微生物燃料电池(MFC)作为餐厨废水前处理工艺的可行性，通过调节不同的有机负荷和不同的堆栈形式，分析其生物产电的潜力和处理效率。对以餐厨废水为底物的微生物燃料电池的研究表明，，餐厨废水可以被微生物燃料电池利用，产电效果良好。MFC中不同浓度餐厨废水的输出电压均超过0.5V，有机物去除率达90%左右，出水浓度低于500mg/L，接近城市污水有机负荷。在底物浓度为270020mg/L时的产电效果与水处理效果尤为突出，稳定输出电压达0.525V，最大功率密度5.6W/m3，并可获得9.45%的库伦效率，相应的TCOD去除率为77%，SCOD去除率为90.3%，TN去除率为88.75%。餐厨废水中有机物的特征分析表明，单环芳烃是餐厨废水的主要组成物质。经MFC处理后，疏水性组分(HPO-A、HPO-N)和过度亲水性酸性组分(TPI-A)中的芳香性蛋白(色氨酸类物质)、溶解性微生物产物得到了优先去除，各组分中的腐殖质类物质得到了一定的积累，使MFC的运行更加稳定。而疏水性组分的TOC含量尚不足总量的30%，UV-254吸收强度也不到总强度的20%，表明MFC对餐厨废水中油类物质的降解较为彻底。对MFC的不同堆栈形式的研究表明，将多个内阻不同的MFC进行合理的串并联堆栈，可以削弱电池间的差异，在实现电压放大的同时，避免了产电过程中的电压反转，而单电池与电池组的质量平衡结果也相差不大。可以说串并联堆栈对餐厨废水在MFC内的整体产电效果与水处理效果影响不大，只是由于水力停留时间的不同，在TCOD的去除上表现出一定的差异性。以上结果表明，餐厨废水中的油类物质经单室MFC处理后，可明显减少，出水中浮油几乎未检出，而残存在出水中的油也以溶解油为主，基本实现了餐厨废水的无害化与资源化。
[Abstract]:In view of the shortage of energy resources and the increasing emissions of untreated kitchen waste, this paper proposes to separate the solid waste from kitchen waste and kitchen wastewater to convert these considerable resources into clean biomass energy, respectively. To realize the dual utilization of waste, and to study the feasibility of single-chamber microbial fuel cell (MFC) as a pretreatment process for kitchen wastewater, by adjusting different organic loads and different stacks, The potential and treatment efficiency of its biological electricity production are analyzed. The study on microbial fuel cell with cooking waste water as substrate shows that the cooking wastewater can be used by microbial fuel cell, and the output voltage of different concentration of cooking wastewater in MFC is more than 0.5 V, and the removal rate of organic matter is about 90%. The effluent concentration is lower than 500mg / L, close to the organic load of municipal sewage. The power generation and water treatment effect is especially prominent when the substrate concentration is 270020mg / L, the stable output voltage is 0.525V, the maximum power density is 5.6W / m3, and the Coulomb efficiency of 9.45% can be obtained. The corresponding removal rate of TCOD is 77g Scod and the removal rate of TN is 90.3%. The removal rate of TN is 88.75. The characteristic analysis of organic matter in cooking wastewater shows that monocyclic aromatic hydrocarbons are the main components of cooking wastewater. Aromatic proteins (tryptophan) in hydrophobic component HPO-AHPO-N and excessive hydrophilic acid component TPI-A, soluble microbial products were removed preferentially, and humic substances in each component were accumulated to a certain extent. The operation of MFC was more stable, and the TOC content of hydrophobic component was less than 30% of the total absorption intensity of UV-254 and less than 20% of the total intensity, which indicated that the degradation of oil in cooking wastewater by MFC was more thorough. The study on the different stacks of MFC shows that reasonable series-parallel stacks with different internal resistances can weaken the differences between the batteries and avoid the voltage reversal in the process of power generation while the voltage amplification is realized. It can be said that series-parallel stacks have little effect on the overall power generation and water treatment of kitchen wastewater in MFC, but only because of the difference of hydraulic retention time. There are some differences in the removal of TCOD. The above results show that the oil in the cooking wastewater treated with single chamber MFC can be significantly reduced, the oil slick in the effluent is almost undetectable, and the remaining oil in the effluent is mainly dissolved oil. The utility model has basically realized the innocuity and resource utilization of the kitchen wastewater.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：X703;TM911.45

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