Media Selection of Artificial Soil Filtration System for Stormwater Runoff Treatment in Beijing

2010 ◽  
Author(s):  
Ping Xu ◽  
Yajun Zhang
Keyword(s):  
Stormwater Runoff ◽  
Artificial Soil ◽  
Media Selection ◽  
Filtration System ◽  
Soil Filtration ◽  
Selection Of

Effect of main-stage filter media selection on the loading performance of a two-stage filtration system

2021 ◽  
Vol 195 ◽  
pp. 107745
Author(s):  
Xinjiao Tian ◽  
Qisheng Ou ◽  
Chenxing Pei ◽  
Zhenming Li ◽  
Jingxian Liu ◽  
...  
Keyword(s):  
Media Selection ◽  
Main Stage ◽  
Filter Media ◽  
Two Stage ◽  
Filtration System

Stormwater runoff treatment filtration system and backwashing system

2019 ◽  
Vol 79 (4) ◽  
pp. 771-778 ◽  
Author(s):  
Junho Lee ◽  
Myungjin Lee
Keyword(s):  
Particle Size ◽  
Removal Efficiency ◽  
Recovery Rate ◽  
Stormwater Runoff ◽  
Pilot Scale ◽  
Solid Loading ◽  
Filter Media ◽  
Turbidity Removal ◽  
Filtration System ◽  
Combined Sewer

Abstract This study has been carried out to evaluate the applicability of the pilot scale hybrid type of stormwater runoff treatment system for treatment of combined sewer overflow. Also, to determine the optimum operation parameter such as coagulation dosage concentration, effectiveness of coagulant usage, surface loading rate and backwashing conditions. The pilot scale stormwater filtration system (SFS) was installed at the municipal wastewater plant serving the city of Cheongju (CWTP), Korea. CWTP has a capacity of 280,000 m3/day. The SFS consists of a hydrocyclone coagulation/flocculation with polyaluminium chloride silicate (PACS) and an upflow filter to treat combined sewer overflows. There are two modes (without PACS use and with PACS use) of operation for the SFS. In case of no coagulant use, the range of suspended solids (SS) and turbidity removal efficiency were 72.0–86.6% (mean 80.0%) and 30.9–71.1% (mean 49.3%), respectively. And, the recovery rate of filter was 79.2–83.6% (mean 81.2%); the rate of remaining solid loading in filter media was 16.4–20.8% (mean 18.8%) after backwashing. The influent turbidity, SS concentrations were 59.0–90.7 NTU (mean 72.0 NTU), 194.0–320.0mg/L (mean 246.7mg/L), respectively. The range of PACS dosage concentration was 6.0–7.1mg/L (mean 6.7mg/L). The range of SS and turbidity removal efficiency was 84.9–98.2 (mean 91.4%) and 70.7–96.3 (mean 84.0%), respectively. It was found that removal efficiency was enhanced with PACS dosage. The recovery rate of filter was 92.0–92.5% (mean 92.3%) the rate of remaining solid loading in filter media was 6.1–8.2% (mean 7.2%) after backwashing. In the case of coagulant use, the particle size of the effluent is bigger than influent particle size. The results showed that SFS with PACS use more effective than without PACS use in SS and turbidity removal efficiency and recovery rate of filter.

scholarly journals Gas Turbine Compressor Operating Environment and Material Evaluation

1989 ◽  
Author(s):  
R. W. Haskell
Keyword(s):  
Gas Turbine ◽  
Material Selection ◽  
Necessary Condition ◽  
Base Materials ◽  
Material Evaluation ◽  
Filtration System ◽  
And Performance ◽  
A Site ◽  
Gas Turbine Compressor ◽  
Selection Of

The reliability and performance of a gas turbine compressor is strongly dependent upon the environment in which it operates, the materials which are used, and the filtration system. Erosion and to a certain extent fouling can be controlled by the filtration system, but corrosion is largely controlled through site and material selection. The factors which determine the corrosivity of a site are humidity, the concentration of acid-forming gases, and the composition of particulates. The interrelationships of these factors are discussed with an aim of reducing their impact on compressor operation. A necessary condition for corrosion is the presence of moisture. The acidity of the moisture results from its interaction with the gases and particulates of the environment. The details of these interactions which are important to turbine operators are discussed. A considerable amount of corrosion testing of base materials and coatings has been performed and this is reviewed. A table is presented for selection of compressor materials based on the nature of the site environment and the type of compressor filtration.

scholarly journals Technology Review of Modern Gas Turbine Inlet Filtration Systems

2012 ◽  
Vol 2012 ◽  
pp. 1-15 ◽  
Author(s):  
Melissa Wilcox ◽  
Rainer Kurz ◽  
Klaus Brun
Keyword(s):  
Gas Turbine ◽  
Life Cycle Cost ◽  
Ambient Air ◽  
Life Cycle Cost Analysis ◽  
Air Filtration ◽  
Successful Operation ◽  
Filtration System ◽  
Operational Life ◽  
The Many ◽  
Selection Of

An inlet air filtration system is essential for the successful operation of a gas turbine. The filtration system protects the gas turbine from harmful debris in the ambient air, which can lead to issues such as FOD, erosion, fouling, and corrosion. These issues if not addressed will result in a shorter operational life and reduced performance of the gas turbine. Modern day filtration systems are comprised of multiple filtration stages. Each stage is selected based on the local operating environment and the performance goals for the gas turbine. Selection of these systems can be a challenging task. This paper provides a review of the considerations for selecting an inlet filtration system by covering (1) the characteristics of filters and filter systems, (2) a review of the many types of filters, (3) a detailed look at the different environments where the gas turbine can operate, (4) a process for evaluating the site where the gas turbine will be or is installed, and (5) a method to compare various filter system options with life cycle cost analysis.

scholarly journals Modeling of the Suspended Solid Removal of a Granular Media Layer in an Upflow Stormwater Runoff Filtration System

2021 ◽  
Vol 11 (13) ◽  
pp. 6202
Author(s):  
Yuhoon Hwang ◽  
Younggyo Seo ◽  
Seokoh Ko ◽  
Dogun Kim
Keyword(s):  
Porous Media ◽  
System Performance ◽  
Granular Media ◽  
Stormwater Runoff ◽  
Suspended Solid ◽  
Filtration System ◽  
The Media ◽  
Specific Deposit ◽  
Media Layer ◽  
Media Capture

Upflow granular media filtration devices are widely used for stormwater runoff treatment. However, the system performance is not well characterized due to the irregular removal of suspended solid (SS) in the pretreatment (sedimentation) chamber and, hence, its irregular input to the media layer. In this regard, the performance of the granular media layer of an upflow filtration system is investigated herein by the use of various models. Due to the significant variation in the SS concentration of the influent and effluent to and from the media layer, the deep bed filtration model, the k-C* model, and the porous media capture model provide limited descriptions of the system performance. By contrast, the performance is well described using the kinetic model, the modified k-C* model using a specific deposit, and the modified porous media capture model using a specific deposit. The parameters of the latter models are shown to be in good correlation with the filtration velocity, SS removal, and specific deposit. The results suggest that modeling using a specific SS deposit can provide an accurate description of the granular media layer performance under a highly variable influent SS concentration.

scholarly journals Effects of Operation Parameters on Pollutants Removal in a Lab-Scale Multi-Layered Soil Filtration System

2012 ◽  
Vol 34 (2) ◽  
pp. 91-96
Author(s):  
Se-Yeon Won ◽  
Dong-Won Ki ◽  
Min-Hyeok Yoon ◽  
Sung-Kyu Maeng ◽  
Kyu-Hong Ahn ◽  
...  
Keyword(s):  
Layered Soil ◽  
Filtration System ◽  
Operation Parameters ◽  
Pollutants Removal ◽  
Soil Filtration

scholarly journals Manajemen Masjid Dalam Peningkatan Kualitas Pengurus dan Jamaah Masjid Al-Birr Perumnas Wekke’e Kota Parepare

2019 ◽  
Vol 9 (1) ◽  
pp. 103-122
Author(s):  
Muhammad Qadaruddin ◽  
Ramli ◽  
Nurlaela Yuliasri
Keyword(s):  
Knowledge Management ◽  
Media Selection ◽  
The Law ◽  
Selection Of

Improving the quality of jama'ah through the management of the mosque, doneby: how to organize the mosque, how to plan, organize, implement and evaluate so thatthe planned program gets input. The stages of planning include the selection of speakers,packaging messages, media selection, to the level of effects of program implementation.Furthermore, the results of the implementation of mosque management activities, it isexpected there is an increase in knowledge management and pilgrims about tajwid andzakat profesi. Most of the board and the pilgrims when asked questions and asked to readthe verses of the Qur'an by the speakers, have been able to mention the letters hijaiyahwell, understand the law if one in reading the Koran, the question and enthusiasm relatedto professional zakat by board and congregation is a testament to the increasingunderstanding of board and congregation. As an output of mosque managementactivities.

Sign in / Sign up

Export Citation Format

Share Document