Experimental study on air ingression and residence time of a small-scale decay tank for a research reactor

2019 ◽  
Vol 134 ◽  
pp. 134-143
Author(s):  
Dae-Yun Ji ◽  
Won-Ki Hwang ◽  
Hyun Ku Kim ◽  
Kwon-Yeong Lee
Keyword(s):  
Experimental Study ◽  
Residence Time ◽  
Research Reactor ◽  
Small Scale

Small scale experimental study of the dynamic response of a tension leg platform wind turbine

2014 ◽  
Vol 6 (5) ◽  
pp. 053108 ◽  
Author(s):  
Anders Mandrup Hansen ◽  
Robert Laugesen ◽  
Henrik Bredmose ◽  
Robert Mikkelsen ◽  
Nikolaos Psichogios
Keyword(s):  
Experimental Study ◽  
Dynamic Response ◽  
Wind Turbine ◽  
Small Scale ◽  
Tension Leg Platform

scholarly journals Efektifitas Biofiltrasi Dengan Media Arang Tempurung Kelapa Dan Batu Apung Terhadap Penurunan Kadar COD, Nitrat Dan Amoniak Dalam Air Limbah Domestik

2020 ◽  
Vol 5 (1) ◽  
pp. 27-35
Author(s):  
Fivi Elvira Sirajuddin ◽  
Muhammad Fadly Saleh
Keyword(s):  
Experimental Study ◽  
Wastewater Treatment ◽  
Residence Time ◽  
Nitrate Removal ◽  
Domestic Wastewater ◽  
Ammonia Removal ◽  
Sampling Time ◽  
Media Composition ◽  
Filter Media ◽  
Domestic Wastewater Treatment

This experimental study aims to determine the most optimal biofiltration media composition for domestic wastewater treatment using 4 upflow biofilter reactors with a combining pumice and coconut shell charcoal as an media filter. ,The combination ratio of media filter is UAF 1 = 1: 0, UAF 2 = 2: 1, UAF 3 = 1: 2, and UAF 4 = 1 : 1 with an overall filter media thickness of 60 cm. Sampling time is done every 2 days for 16 day were taken at the four experimental reactors to be tested for each parameter of pH, COD, nitrate and ammonia. The method of analysis carried out after obtaining data from testing in the laboratory, that is descriptively related to variations in filter media, and the residence time of wastewater in the reactor. The results showed that the reactor with the best processing in normalizing pH was UAF 1. While the best filter media composition in COD and nitrate removal was UAF 3 reactor with 77.78% and 87.17% removal results. Ammonia removal occurred throughout the experimental reactor with a result <-0.05 mg / l was considered quite good and indicated the decomposition process was successful. Penelitian ini dilakukan untuk menentukan komposisi media biofiltrasi yang paling optimal untuk pengolahan air limbah domestik dengan menggunakan 4 reaktor upflow biofilter dengan mengkombinasikan batu apung dan arang tempurung kelapa sebagai media filter. Rasio dari kombinasi media filter tersebut adalah UAF 1 = 1:0, UAF 2 = 2:1, UAF 3=1:2, dan UAF 4=1:1 dengan ketebalan media filter secara keseluruhan 60 cm. Waktu pengambilan sampel dilakukan setiap 2 hari selama 16 hari. Pengambilan sampel dilakukan pada keempat reaktor percobaan untuk diujikan masing-masing parameter pH, COD, nitrat dan amoniak. Metode analisa yang dilakukan setelah mendapatkan data dari pengujian di laboratorium, yaitu secara deskriptif terkait dengan variasi media filter, dan waktu tinggal air limbah dalam reaktor. Hasil penelitian menunjukkan reaktor yang paling baik pengolahannya dalam menormalkan pH adalah UAF 1. Sementara komposisi media filter yang paling baik dalam penyisihan COD dan nitrat adalah reaktor UAF 3 dengan hasil penyisihan sebesar 77,78% dam 87,17%. Penyisihan amoniak terjadi di seluruh reaktor percobaan dengan hasil <-0,05 mg/l dinilai cukup baik dan mengindikasikan proses penguraian polutan berjalan dengan baik.

scholarly journals AN EXPERIMENTAL STUDY ON SAND DUNE SEDIMENT TRANSPORT DUE TO TSUNAMI OVERWASH

2017 ◽  
pp. 15
Author(s):  
K M Ahtesham Hossain Raju ◽  
Shinji Sato
Keyword(s):  
Experimental Study ◽  
Sediment Transport ◽  
Mathematical Models ◽  
Storm Surge ◽  
Laboratory Study ◽  
Sand Dune ◽  
Small Scale ◽  
Data Set ◽  
Grain Sizes ◽  
Dry Sand

Response of sand dune when overwashed by tsunami or storm surge, is investigated by conducting small scale laboratory study. Dune consisting of initially wet sand and initially dry sand are tested for three different sand grain sizes. Overtopping of water and the corresponding sediment transport are analyzed. These data set can be used to validate mathematical models associated with dune sediment transport as well as prediction of dune profile.

scholarly journals Experimental study on a small scale of gas hydrate cold storage apparatus

2010 ◽  
Vol 87 (11) ◽  
pp. 3340-3346 ◽  
Author(s):  
Yingming Xie ◽  
Gang Li ◽  
Daoping Liu ◽  
Ni Liu ◽  
Yingxia Qi ◽  
...  
Keyword(s):  
Experimental Study ◽  
Cold Storage ◽  
Gas Hydrate ◽  
Small Scale

EXPERIMENTAL STUDY ON USE OF FALL PREVENTION MEMBERS IN WALL AND COLUMN DEMOLITION

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Seiji Takanashi ◽  
Hiroki Takahashi ◽  
Tomohito Hori
Keyword(s):  
Experimental Study ◽  
Fall Prevention ◽  
Urban Areas ◽  
Steel Pipe ◽  
Small Scale ◽  
Bottom Part ◽  
Steel Pipes ◽  
Wire Ropes ◽  
Heavy Machinery ◽  
Measured Load

At demolition sites in Japan, columns and walls are pulled down and demolished by heavy machinery or wire ropes. In a small-scale building in urban areas, columns and walls are pulled down by wire ropes. Before pulling down, workers damage the bottom part of the columns and walls for weakening them. However, if the damage of the columns and walls are too much, they fall down before use of wire ropes. As a result, they may crush workers. In this study, a fall prevention material was proposed with its installation method and verified its effectiveness by experiments. In an experiment of this study, steel pipes for supporting 3m-column were examined. The steel pipes were installed diagonally to the column. The column was loaded horizontally. We measured load and deformation until the steel pipe failed. As a result of experiments, it was found that the steel pipe buckled or the bolt supporting the steel pipe damaged. We concluded that this method is effective because the steel pipes were found to be sufficiently strong against the load generated in the steel pipes when the columns fell.

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