Comprehensive evaluation of substrates in vertical-flow constructed wetlands for domestic wastewater treatment

2015 ◽  
Vol 10 (3) ◽  
pp. 625-632 ◽  
Author(s):  
Junmei Wu ◽  
Dong Xu ◽  
Feng He ◽  
Jie He ◽  
Zhenbin Wu
Keyword(s):  
Constructed Wetlands ◽  
Nitrogen Removal ◽  
Phosphorus Removal ◽  
Evaluation System ◽  
Comprehensive Evaluation ◽  
Steel Slag ◽  
Domestic Wastewater ◽  
Vertical Flow ◽  
Substrate Selection ◽  
Comprehensive Evaluation System

Substrates are the important component of constructed wetlands (CWs), which have an effect on construction cost, purification capability and stable operation, so that substrate optimization is the key part of CWs design. The comprehensive evaluation system, including four layers, eleven indicators and nine schemes, for substrates in vertical-flow CWs treating domestic wastewater was established based on analytic hierarchy process. Then combined with Delphi method and fuzzy synthetic evaluation approach, zeolite, anthracite, shale, vermiculite, ceramic filter material, gravel, steel slag, bio-ceramic and combination substrate (isopyknic layered anthracite, bio-ceramic and zeolite) were evaluated from the viewpoints of purification effect, practical performance and economic analysis. The results showed that phosphorus removal, nitrogen removal, chemical stability were the main factors of substrate selection. Combination substrate was the best scheme among nine substrates. Zeolite was ideal substrate for nitrogen removal and biocompatibility, while anthracite and steel slag were ideal substrates for phosphorus removal. The comprehensive evaluation system of substrates was beneficial to comprehensive compare all aspects of performance for different substrates, and could be improved according to the actual situation of engineering applications, so as to provide guidance of substrate selection for CWs design.

Comparative research on phosphorus removal by pilot-scale vertical flow constructed wetlands using steel slag and modified steel slag as substrates

2015 ◽  
Vol 71 (7) ◽  
pp. 996-1003 ◽  
Author(s):  
Yupan Yun ◽  
Xiaoqin Zhou ◽  
Zifu Li ◽  
Sayed Mohammad Nazim Uddin ◽  
Xiaofeng Bai
Keyword(s):  
Constructed Wetlands ◽  
Phosphorus Removal ◽  
Steel Slag ◽  
Pilot Scale ◽  
Phosphorus Concentration ◽  
Vertical Flow ◽  
Phosphorus Adsorption ◽  
Vertical Flow Constructed Wetlands ◽  
Low Phosphorus ◽  
Set Up

This research mainly focused on the phosphorus removal performance of pilot-scale vertical flow constructed wetlands with steel slag (SS) and modified steel slag (MSS). First, bench-scale experiments were conducted to evaluate the phosphorus adsorption capacity. Results showed that the Langmuir model could better describe the adsorption characteristics of the two materials; the maximum adsorption of MSS reached 12.7 mg/g, increasing by 34% compared to SS (9.5 mg/g). Moreover, pilot-scale constructed wetlands with SS and MSS were set up outdoors. Then, the influence of hydraulic retention time (HRT) and phosphorus concentration in phosphorus removal for two wetlands were investigated. Results revealed that better performance of the two systems could be achieved with an HRT of 2 d and phosphorus concentration in the range of 3–4.5 mg/L; the system with MSS had a better removal efficiency than the one with SS in the same control operation. Finally, the study implied that MSS could be used as a promising substrate for wetlands to treat wastewater with a high phosphorus concentration. However, considering energy consumption, SS could be regarded as a better alternative for substrate when treating sewage with a low phosphorus concentration.

Research and Construction of Clean Production Comprehensive Evaluation System to Printing Equipment

2015 ◽  
Vol 731 ◽  
pp. 401-406
Author(s):  
Rui Ting Pei ◽  
Hong Chen
Keyword(s):  
Index System ◽  
Evaluation System ◽  
Energy Use ◽  
Comprehensive Evaluation ◽  
Evaluation Index System ◽  
Expert Advice ◽  
The Sustainable Development ◽  
Clean Production ◽  
Comprehensive Evaluation System ◽  
Equipment Manufacture

<p>With the increasingly serious environmental problems, how to achieve the sustainable development of environment and economic has become a widespread concern at home and abroad. Through the research and analysis of clean production and clean production evaluation index system of domestic and foreign, and according to statistical theory, the reasonable and effective sampling method was determined. By researching the printing equipment manufacture and equipment applied enterprise of domestic, the data contained printing equipment energy use, emissions and product characteristic was obtained. By using the method of expert advice and factor analysis, clean production evaluation indicators and index system was determined.</p>

scholarly journals The Comprehensive Evaluation System of Construction Technology

1993 ◽  
Vol 1 ◽  
pp. 121-134
Author(s):  
Masahiko KUNISHIMA ◽  
Tsunemi WATANABE ◽  
Hyun Yang SHIN ◽  
Masahide HORITA
Keyword(s):  
Evaluation System ◽  
Comprehensive Evaluation ◽  
Construction Technology ◽  
Comprehensive Evaluation System

Study on Selection and Optimization of Vertical Transportation Equipment for High-Rise Construction

2010 ◽  
Vol 168-170 ◽  
pp. 2376-2381
Author(s):  
Xi Jing Qi ◽  
Xiao Hu Zhou ◽  
Ming Liang Song ◽  
Feng Ming Li
Keyword(s):  
Project Management ◽  
Evaluation System ◽  
Comprehensive Evaluation ◽  
Close Attention ◽  
Transportation Equipment ◽  
High Rise ◽  
Practical Project ◽  
Study Results ◽  
Objective System ◽  
Comprehensive Evaluation System

High-rise buildings in China has developed rapidly in recent years and problems such as construction and vertical transportation have been paid close attention more and more by society. The safety project management objective system mentioned in this article has comprehensively considered the characteristics of high-rise construction and vertical transportation and provided a comprehensive evaluation system for vertical transportation equipment for high-rise construction, which may be used for guiding equipment selection and optimization of equipment use. Meanwhile, the study results are applied in practical project to verify its effectiveness and practicability, so as to guide the enterprises to reasonably select and use vertical transportation equipment for high-rise construction and to realize the integration benefits of the project.

The Research and Actualize of the Quality Management System’s Effectiveness Evaluation

2010 ◽  
Vol 26-28 ◽  
pp. 547-552
Author(s):  
Shi Lin Feng
Keyword(s):  
Quality Management ◽  
Evaluation System ◽  
Quality Management System ◽  
Comprehensive Evaluation ◽  
Evaluation Index ◽  
Effectiveness Evaluation ◽  
Evaluation Result ◽  
Improvement Measure ◽  
Comprehensive Evaluation System ◽  
Set Up

To guarantee the run effectiveness of the quality management system(QMS), a comprehensive evaluation system of the QMS’s effectiveness is brought forward. In the evaluation system, first the evaluation flow chart is set up; Second the evaluation index is given out; Third the evaluation result is given out by the calculate of the grey integration evaluation arithmetic. The organization can find out why the effectiveness of the QMS is weak and establish improvement measure from the comprehensive evaluation result.

scholarly journals THE CONSTRUCTION OF A COMPREHENSIVE EVALUATION SYSTEM OF REGIONAL PUBLIC SPORTS SERVICE SUPPLY IN CHINA BASED ON RECIPIENT SATISFACTION INDEX MODEL

2021 ◽  
Vol 27 (spe) ◽  
pp. 56-58
Author(s):  
Pei Jiang
Keyword(s):  
Evaluation System ◽  
Large Scale ◽  
Comprehensive Evaluation ◽  
Service Level ◽  
Difficult Problem ◽  
Performance Evaluation System ◽  
Satisfaction Index ◽  
Index Model ◽  
Comprehensive Evaluation System ◽  
Scale Design

ABSTRACT The comprehensive performance evaluation system of public sports service is an important part of public sports service system in China. How to objectively and comprehensively evaluate the present situation of public sports service performance in our country has always been a difficult problem in the development of public sports service. Based on the five principles of constructing the recipient satisfaction index, the PCSSI model of the comprehensive evaluation system of public sports service supply was constructed using scale design. Large-scale stadiums in seven districts of Shenyang were selected for investigation. The recipient satisfaction index model was established to compare the satisfaction index of the 7 regions, and analyze the influencing factors of the satisfaction index of public sports service supply, and put forward some suggestions for improving the service level of large stadiums and gymnasiums in Shenyang. Practice has proved that the application of the PCSSI model has a positive effect on improving the performance level of public sports service supply in China.

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