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Treating both wastewater and excess sludge with an innovative process

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Journal of Environmental Sciences 2003年第6期15卷 749-756页

作者： HE Sheng-bing, wang Bao-zhen, wang Lin, JIANG Yi-feng (School of Municipal & Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. School of Municipal & Environmental Engineering Harbin Institute of Technology Harbin 150090 China

The innovative process consists of biological unit for wastewater treatment and ozonation unit for excess sludge treatment. An aerobic membrane bioreactor(MBR) was used to remove organics and nitrogen, and an anaerobic reactor was added to the biological unit for the release of phosphorus contained at aerobic sludge to enhance the removal of phosphorus. For the excess sludge produced in the MBR, which was fed to ozone contact column and reacted with ozone, then the ozonated sludge was returned to the MBR for further biological treatment. Experimental results showed that this process could remove organics, nitrogen and phosphorus efficiently, and the removals for COD, NH 3-N, TN and TP were 93.17%, 97.57%, 82.77% and 79.5%, respectively. Batch test indicated that the specific nitrification rate and specific denitrification rate of the MBR were 1.03 mg NH 3-N/(gMLSS·h) and 0.56 mg NOx-N/(gMLSS·h), and denitrification seems to be the rate-limiting step. Under the test conditions, the sludge concentration in the MBR was kept at 5000—6000 mg/L, and the wasted sludge was ozonated at an ozone dosage of 0.10 kgO 3/kgSS. During the experimental period of two months, no excess sludge was wasted, and a zero withdrawal of excess sludge was implemented. Through economic analysis, it was found that an additional ozonation operating cost for treatment of both wastewater and excess sludge was only 0.045 RMB Yuan(USD 0.0054)/m 3 wastewater.

关键词： wastewater treatment excess sludge aerobic membrane bioreactor(MBR) anaerobic reactor ozonation zero withdrawal of excess sludge

A novel approach to treat combined domestic wastewater and excess sludge in MBR

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Journal of Environmental Sciences 2003年第5期15卷 674-679页

作者： HE Sheng bing, wang Bao zhen, wang Lin, JIANG Yi feng, ZHANG Li\|qiu (School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China. School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090

Domestic wastewater was treated by combined anaerobic biofilm aerobic membrane bioreactor(MBR) process, and part biomass in MBR was withdrawn to treat with ozone, then the ozonated sludge was returned to anaerobic inlet. In aerobic MBR, MLSS and DO were controlled at 3000—3500 mg/L and 0 8 mg/L respectively. Comparing the experimental results of two stages, it was noticed that ozonation did not affect the removal efficiency for organics but had a significant influence on the removals of NH 3 N and TN. During the ozonation period of two months, no excess sludge was wasted, and a zero sludge yield was obtained.

关键词： combined anaerobic biofilm aerobic membrane(MBR) domestic wastewater ozonation excess sludge sludge yield

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一种显微图像测量系统的标定方法

光电工程 2006年第2期33卷 119-122页

作者：王兵振刘文耀天津大学精密仪器与光电子工程学院教育部光电信息技术科学实验室天津300072

提出了一种显微图像测量系统的标定方法。该方法通过同一对平行边缘在垂直和水平方向的两幅图像,计算水平比例因子;利用标定物直线边缘的图像,并运用优化的方法来计算成像系统的畸变系数和主点位置。在上述计算的基础上,利用量块来标定... 详细信息

提出了一种显微图像测量系统的标定方法。该方法通过同一对平行边缘在垂直和水平方向的两幅图像,计算水平比例因子;利用标定物直线边缘的图像,并运用优化的方法来计算成像系统的畸变系数和主点位置。在上述计算的基础上,利用量块来标定系统的放大倍数。标定过程所需的标定物为量规和带有平行刻线光学器件,如分辨率板等,因此方便实用。试验结果表明,该方法标定精度较高,标定后的实验装置的极限误差3σ为2.26μm。

关键词：显微测量相机标定平行线图像处理

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面向直线类目标图像测量的对焦算法

光电工程 2005年第12期32卷 63-65,70页

作者：刘文耀王兵振天津大学精密仪器与光电子工程学院教育部光电信息技术科学实验室天津300072

针对直线类边缘图像测量中的对焦问题,文章提出了一种利用被测边缘梯度信息的对焦算法。在包含被测边缘的区域内,该算法计算各行或列中被测边缘点的梯度值,求出这些梯度值的平均值;根据聚焦时边缘梯度相对达到最大的成像特点,将所求得... 详细信息

针对直线类边缘图像测量中的对焦问题,文章提出了一种利用被测边缘梯度信息的对焦算法。在包含被测边缘的区域内,该算法计算各行或列中被测边缘点的梯度值,求出这些梯度值的平均值;根据聚焦时边缘梯度相对达到最大的成像特点,将所求得的边缘梯度平均值作为聚焦程度的评价准则。该算法与两种常用对焦算法——灰度差分法和灰度方差法的对比试验表明,在保持平滑性不变的情况下,该算法的单峰幅值比灰度方差法大10倍;它克服了灰度差分法依赖阈值的缺点,而且平滑性明显优于后者,其局部波动平均幅值仅为灰度差分法的1/10。

关键词：数字图像处理图像测量自动对焦灰度梯度

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玻璃小球直径的图像测量方法

光电工程 2005年第10期32卷 70-73页

作者：刘文耀王兵振天津大学精密仪器与光电子工程学院教育部光电信息技术科学实验室天津300072

提出了一种基于数字图像处理技术的微小玻璃球直径的测量方法。该方法采用Sobel算子计算目标的梯度图像,取阈值对其进行二值化处理;根据边缘成像特点,通过数学规划法计算小球边缘的初始位置;在此基础上,采用空间矩亚像素定位算法对目标... 详细信息

提出了一种基于数字图像处理技术的微小玻璃球直径的测量方法。该方法采用Sobel算子计算目标的梯度图像,取阈值对其进行二值化处理;根据边缘成像特点,通过数学规划法计算小球边缘的初始位置;在此基础上,采用空间矩亚像素定位算法对目标边缘进行精确定位;通过拟合这些边缘点,即可求得目标直径。实验结果表明,该方法对二值化阈值的依赖性小,抗噪声能力强;在一定的范围内,阈值的不同对该算法重复精度的影响小于0.06个像素;由于采用交互方式选定处理区域,算法的计算速度较快,完成一次计算的时间不到1s。

关键词：直径测量微小玻璃球数字图像处理边缘检测

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显微测量系统外参数标定的研究

计量学报 2007年第1期28卷 23-28页

作者：尚进刘文耀王兵振天津大学精密仪器与光电子工程学院天津300072

在介绍了Tsai氏标定方法的基础上提出了一种应用于显微测量系统的标定方法。该方法不需要标定出摄像机的绝对坐标,而是通过实验的方法测量出两摄像机系统之间的角度关系,得到其旋转矩阵,进而标定出整个系统的外参数。在显微测量应用中,... 详细信息

在介绍了Tsai氏标定方法的基础上提出了一种应用于显微测量系统的标定方法。该方法不需要标定出摄像机的绝对坐标,而是通过实验的方法测量出两摄像机系统之间的角度关系,得到其旋转矩阵,进而标定出整个系统的外参数。在显微测量应用中,这种新的标定技术比传统的Tsai氏标定法计算量更小,实用性更强,并能保证较高的标定精度。

关键词：计量学显微测量径向准直约束内参数外参数畸变

Prediction and optimization of flue pressure in sintering process based on SHAP

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 346-359页

作者： Mingyu wang Jue Tang Mansheng Chu Quan Shi zhen Zhang School of Metallurgy Northeastern UniversityShenyang 110819China Liaoning Low-Carbon Steelmaking Technology Engineering Research Center Northeastern UniversityShenyang 110819China Engineering Research Center of Frontier Technologies for Low-Carbon Steelmaking(Ministry of Education) Shenyang 110819China

Sinter is the core raw material for blast *** pressure,which is an important state parameter,affects sinter *** this paper,flue pressure prediction and optimization were studied based on the shapley additive explanation(SHAP)to predict the flue pressure and take targeted adjustment ***,the sintering process data were collected and processed.A flue pressure prediction model was then constructed after comparing different feature selection methods and model algorithms using SHAP+extremely random-ized trees(ET).The prediction accuracy of the model within the error range of±0.25 kPa was 92.63%.SHAP analysis was employed to improve the interpretability of the prediction *** effects of various sintering operation parameters on flue pressure,the relation-ship between the numerical range of key operation parameters and flue pressure,the effect of operation parameter combinations on flue pressure,and the prediction process of the flue pressure prediction model on a single sample were analyzed.A flue pressure optimization module was also constructed and analyzed when the prediction satisfied the judgment *** operating parameter combination was then *** flue pressure was increased by 5.87%during the verification process,achieving a good optimization effect.

关键词： sintering process flue pressure shapley additive explanation prediction optimization