生物制氢混合培养系统启动与运行的人工操作

采用连续流搅拌槽式反应系统(CSTR)作为反应装置,以糖蜜废水为发酵底物,污水处理厂剩余污泥为反应的启动污泥,着重对pH和氧化还原电位(ORP)调控下生物制氢反应器乙醇型发酵的启动进行了研究.结果表明:在温度为(35±1)℃,水力停留时间(HRT)为6h,进水COD为4000mg/L时,通过调节ORP和系统pH值可在约33d实现生物制氢反应器中微生物的主要代谢类型为乙醇型发酵,并实现稳定产氢.     

危机矿山深部找矿研究现状与建议

分析了危机矿山深部找矿的意义,介绍了危机矿山的分类,论述了危机矿山深部找矿的科学依据,从理论上、技术上分析了危机矿山深部找矿的可行性,提出了危机矿山关键找矿技术,并从四个方面提出了我国资源危机矿山深部找矿的建议。     

红外热图的预处理设计

为解决红外热图强噪声、低对比度的问题,引入灰度调整法和巴特沃斯低通滤波方法。先对红外热图特点进行了分析,对理想的图像处理目标进行了设计。根据目标,设计处理步骤,并实施相应处理环节,发现该处理方法有效地削弱了噪声带来的高频信号,降低正常区域背景,使得原本模糊的缺陷信号变得清晰,而且提高了图像的整体对比度,为下一步缺陷的分割和定量计算奠定了基础。     

利用CSTR生物制氢系统厌氧发酵的研究现状

生物制氢技术在开发能源方面具有重要的现实地位,连续流搅拌槽式反应系统（CSTR）采用机械搅拌,传质效率高,可有效提高产氢效率,同时此设备技术要求较为简单,能大幅降低生物制氢的成本,易于实现氢气的工业化生产.本文阐述了连续流搅拌槽式反应器（CSTR）生物制氢系统的研究进展,着重剖析了CSTR生物制氢系统的影响因素、底物范围和相关的技术研究,并对其发展和实际应用进行了简要论述.     

制造网格资源共享服务平台的设计与实现

为了整合区域化制造企业间的资源以实现资源共享和协同工作,参考网格的运行机制,搭建了制造网格资源共享服务平台,设计了该平台的资源共享管理系统、协同工作系统和运营管理中心.在此基础上,开发了制造网格资源共享服务平台的原型系统,初步验证了平台设计的可行性和实用性.     

地方高校IT类专业校企协同实训工作机制研究

通过对地方高校IT类专业校企协同实训工作机制进行研究,提出建立校企协同实训基地和协同实训网络平台,以企业真实系统作为实训项目,以平台为沟通桥梁,实现企业导师异地在线指导,校内教师异地在线监控,解决时间和空间的限制,减少学生校外实习失控的状况。     

基于LSTM的水利信息分发实时推荐算法

随着水利信息化建设的逐步深入,水情信息的实时推荐需求越来越强烈。水利数据具有很强的时效性,要求推荐系统能够提供实时推荐服务。基于用户的协同过滤算法和基于信息的协同过滤算法(Item-based Collaborative Filtering,ItemCF)是推荐领域常用的2种算法,但两者在本质上都属于离线算法,不能满足水情信息分发实时性要求。提出了一种基于长短期记忆神经网络(Long-Short-Term Memory,LSTM)的水情信息分发实时推荐算法并对其优化。实验结果表明:基于LSTM的实时推荐算法在推荐时延方面最优,而优化的结合二分类模型和ItemCF推荐结果的实时推荐算法在推荐准确率方面最优,设计实现优化的基于LSTM的实时推荐算法综合效果较好,在保证水情信息推荐准确性的同时保证了推荐实时性。     

Effect of Cu2+ concentration on hydrogen fermentation by mixed culture

The results of the study on the effect of Cu2+ concentration on hydrogen production using a glucose solution and mixed microorganisms from a 9.2 L laboratory-scale digester operated at 35 ℃ indicated the productions of hydrogen, volatile fatty acids (VFAs), ethanol and biogas were inhibited by the added Cu2 + which caused a reduction in the glucose degradation efficiency. The specific yields of hydrogen, ethanol and acetate decreased with increased Cu2+ concentration in the mixed microorganisms. When the Cu2 + concentration in the mixed microorganisms was almost an constant, the specific yields of hydrogen, ethanol and acetate were very similar. A 50% inhibition of hydrogen yield (ECso) occurred at a Cu2+ dosage of 0. 50 mg/L in the present investigation. Cu2+ in the external environment is accumulated in the mixed microorganisms. The Cu2 + speciation, using a sequential extraction technique, showed that the Cu2+ was present mainly bound to organic sites in the mixed microorganisms in the present investigation.     

UASB反应器废糖蜜在启动阶段的废水处理和生物制氢

在启动阶段,对传统上流式厌氧污泥层反应器(UASB)和改良的UASB反应器去除化学需氧量(COD)和发酵生物制氢进行了研究和比较.改性UASB反应器和常规UASB反应器的最大COD去除率分别为82和68.4％,最大产氢率(HPR)分别为 188.99 mmol-h2 L-1h-1 和 117.03 mmol-h2 L-...     

煤气废水酸化破乳预处理功效探讨

General pretreatment processes of ammonia stripping and phenols solvent extraction can reduce the concentration of toxic compounds of the coal gasification wastewater for the following biological treatment. However, some emulsified coal tar still exists in the influent and many substances in coal tar are refractory and toxic to microorganisms. This study is mainly on the removal of emulsified coal tar by acidification demulsion. The experimental results show that the acidification process of the wastewater by pure hydrochloric acid can reduce the chemical oxygen demand （COD）, total organic carbon （TOC）, total phenolics and oil about 3.1%-11.3%, 6%-- 10.8%, 5.3%--8.6% and 25.2%--57.4% respectively with pH value in the range of 4 to 7. The analysis of molecular weight distribution indicates that compounds removed from the wastewater by this process are large molecular substances. The experiment also shows that the efficiency of COD removal in the demulsion process by different acids is different and the phosphoric acid is prominent. The preserved time of the wastewater also affects the efficiency of demulsion. Small amount low-cost solid additives including kaolin and diatomite can improve the rate of coal tar sedimentation and enhance the removal efficiency of organics in the phosphoric acidification process.