水利工程建设与水利工程管理

水利工程的管理,能够提高水利工程的施工质量和效率。通过开展该项工作,就能够提高了水利工程的建造效率和安全工作,进而保障了农业生产的迅速发展和国民经济生产条件的改善。水利工程是国家最重要的基本建设之一。在水利建设和水利工程管理等方面,与我国国民经济发展的情况息息相关,我国虽然目前已有了相应的工程建设与管理制度,但由于经济发展状况的不同,在此基础上仍面临着许多困难,本章对此措施做了简单的论述。

Deep learning-based intelligent management for sewage treatment plants

It is generally believed that intelligent management for sewage treatment plants(STPs) is essential to the sustainable engineering of future smart cities.The core of management lies in the precise prediction of daily volumes of sewage.The generation of sewage is the result of multiple factors from the whole social system.Characterized by strong process abstraction ability,data mining techniques have been viewed as promising prediction methods to realize intelligent STP management.However,existing data mining-based methods for this purpose just focus on a single factor such as an economical or meteorological factor and ignore their collaborative effects.To address this challenge,a deep learning-based intelligent management mechanism for STPs is proposed,to predict business volume.Specifically,the grey relation algorithm(GRA) and gated recursive unit network(GRU) are combined into a prediction model(GRAGRU).The GRA is utilized to select the factors that have a significant impact on the sewage business volume,and the GRU is set up to output the prediction results.We conducted a large number of experiments to verify the efficiency of the proposed GRA-GRU model.

Adsorption characteristics of a novel ceramsite for heavy metal removal from stormwater runoff

Urban sediments have rapidly increased in recent years around the world,and their effective management has become an important problem.To remove heavy metals from stormwater runoff and use sediments as a resource,a novel ceramsite was developed using sewer pipe sediments(SPS),river bed sediments(RBS),urban water supply treatment sludge(WSTS),and wastewater treatment plant excess sludge(WWTS).The optimal composition was determined based on the Brunauer–Emmett–Teller specific surface area and an orthogonal test design.The adsorption characteristics of the novel ceramsite for dissolved heavy metals(Cu^(2+)and Cd^(2+)) were investigated through adsorption isotherms and kinetic experiments at(25±1)℃.Both Cu^(2+) and Cd^(2+) were effectively removed by the novel ceramsite,and their equilibrium adsorption was 4.96 mg·g^(-1) and 3.84 mg·g^(-1),respectively.Langmuir isotherms and a pseudo-first-order kinetic equation described the adsorption process better than other techniques.Characterization analysis of the ceramsite composition before and after heavy metal adsorption showed that the Cu^(2+) and Cd^(2+) contents in the ceramsite increased after adsorption.The results revealed that adsorption is both a physical and chemical process,and that ceramsite can be used as a bioretention medium to remove heavy metals from stormwater runoff while simultaneously converting problematic urban sediments into a resource.

A Case Study of the Safety Management in WWTPs

Wastewater treatment plants （WWTPs） can represent risks source for human health and environment, due to the use of chemicals and substances produced by the treatment process. In particular, considering a conventional urban wastewater treatment plant, two case studies have been considered in this paper： the phase of disinfection with Peracetic Acid （PAA）, used as reactant and the sludge anaerobic digestion, generating biogas. The aim of the experience is to find out some management suggestions that could make safer these sections of a WWTP.

锅炉化学清洗后爆管的原因分析及对策

目前，部分锅炉使用单位锅炉水处理不过关，锅炉结水垢严重。一般采用化学清洗方法除水垢。《锅炉水处理监督管理规则及锅炉化学清洗规则》-1999规定化学清洗碳酸盐水垢的除垢率≥80％，化学清洗硅酸盐和硫酸盐水垢的除垢率≥60％。但是因为锅内的结垢部位、厚度和水垢类别不同，化学清洗后锅内局部还会残存很多水垢。锅炉运行时会脱落堆积在锅筒底部、集箱内或水冷壁管内，严重地影响了锅炉的安全平稳运行。

Discussion on Urban Sewage Treatment Technology of Dalian

Taking a sewage treatment project of Dalian for example, this paper studied the feasibility and characteristics of two sewage treatment technologies, analyzed the process, operation management and energy consumption, and determined the hydrolytic sedimentation tank - biological filter - V-Filter technology as the final solution of this project.