Effects of Fish on Transparency of Water in Tank with Porous Concrete Block and Phosphorus Absorbent

2006 ◽  
Vol 42 (1) ◽  
pp. 1-8
Author(s):  
NOBUYUKI AIKO ◽  
MASAYUKI SETO
1996 ◽  
Vol 40 ◽  
pp. 1009-1014
Author(s):  
Kazutoshi KAN ◽  
Tuyoshi HORIGUCHI ◽  
Hideaki TARE

2014 ◽  
Vol 69 (7) ◽  
pp. 1526-1533 ◽  
Author(s):  
Luis A. Sañudo-Fontaneda ◽  
Susanne M. Charlesworth ◽  
Daniel Castro-Fresno ◽  
Valerio C. A. Andres-Valeri ◽  
Jorge Rodriguez-Hernandez

Pervious pavements have become one of the most used sustainable urban drainage system (SUDS) techniques in car parks. This research paper presents the results of monitoring water quality from several experimental car park areas designed and constructed in Spain with bays made of interlocking concrete block pavement, porous asphalt, polymer-modified porous concrete and reinforced grass with plastic and concrete cells. Moreover, two different sub-base materials were used (limestone aggregates and basic oxygen furnace slag). This study therefore encompasses the majority of the materials used as permeable surfaces and sub-base layers all over the world. Effluent from the test bays was monitored for dissolved oxygen, pH, electric conductivity, total suspended solids, turbidity and total petroleum hydrocarbons in order to analyze the behaviour shown by each combination of surface and sub-base materials. In addition, permeability tests were undertaken in all car parks using the ‘Laboratorio Caminos Santander’ permeameter and the Cantabrian Portable Infiltrometer. All results are presented together with the influence of surface and sub-base materials on water quality indicators using bivariate correlation statistical analysis at a confidence level of 95%. The polymer-modified porous concrete surface course in combination with limestone aggregate sub-base presented the best performance.


2007 ◽  
Vol 51 ◽  
pp. 1415-1420
Author(s):  
Nobuhiro MATSUNAGA ◽  
Sousuke MASUDA ◽  
Taishi NAKAMUTA ◽  
Takahisa TOKUNAGA ◽  
Shinichiro YANO ◽  
...  

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
João Pedro Junqueira Gomes ◽  
Alisson Pinto Soares Ponzo ◽  
Alisson Souza de Oliveira

The success of the coffee activity depends on the beans drying process since it influences the physical and chemical coffee quality, whose result can be good or bad quality beverages. In this sense, the type of terrace has considerable influence on the product’s final quality. Therefore, in this study, ground soil terraces and porous concrete paving blocks will be evaluated, and the experiment was conducted in the city of Cambuquira/MG. For this purpose, porous concrete and compressed earth blocks with dimensions of 50 cm x 50 cm x 10 cm were built, totaling 10 blocks of each type of terrace. The experimental design was in randomized blocks (RB), using cherry coffee, with 10 replications, with a total of 20 plots. For the evaluation of the water infiltration capacity in the porous concrete paving block, a cylinder of 30 cm in diameter was used placed in the center of the porous concrete block, and the lower edges rejoined with cement to guarantee the use of the internal area of the cylinder only. The drying process of coffee on a porous concrete paving block terrace provided better quality both in the beverage and in the reduction of the number of defects in the beans. In the city of Cambuquira, the potential for infiltration and storage of rainwater is 58.8 m³ year-1. Considering a 10-year lifespan, the construction of the porous concrete paving block terrace is economically viable concerning the ground soil terrace, providing gains of up to 15%.


2001 ◽  
Vol 7 (14) ◽  
pp. 65-68
Author(s):  
Kazutoshi FUJII ◽  
Kenji TOKUNAGA ◽  
Hiroshi JITOUSONO ◽  
Hideo TAHARA ◽  
Torao KEMI

Author(s):  
Chris Kresin ◽  
◽  
William James ◽  
David Elrick ◽  
◽  
...  

2008 ◽  
Vol 52 ◽  
pp. 1291-1296
Author(s):  
Nobuhiro MATSUNAGA ◽  
Sousuke MASUDA ◽  
Taishi NAKAMUTA ◽  
Takahisa TOKUNAGA ◽  
Shinichiro YANO ◽  
...  

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