scholarly journals Occurrence and Control of Chironomid (Tendipedinae) Larvae in the K. Water Purification Plant.

1971 ◽  
Vol 7 (2) ◽  
pp. 10-17
Author(s):  
Hideyo UENO
Keyword(s):  
Water Purification ◽  
And Control ◽  
Purification Plant

Estimation of hypolimnetic discharge on improvement of water quality and control of phytoplankton blooms in yamaguchi reservoir

2012 ◽  
Vol 7 (2) ◽  
Author(s):  
Akiko Fukutani ◽  
Yukio Taguchi
Keyword(s):  
Water Purification ◽  
Water Levels ◽  
Phytoplankton Production ◽  
Fragilaria Crotonensis ◽  
Effective Depth ◽  
Different Depths ◽  
Diatom Blooms ◽  
Selective Intake ◽  
And Control ◽  
Purification Plant

Sakai water purification plant (Sakai WPP) and Higashi-murayama water purification plant (Higashi-murayama WPP) take water from Yamaguchi reservoir (20 m-effective depth) by Intake tower No.1 and No. 2. Yamaguchi reservoir, refilled with water after seismic reinforcement to the dam body, started its operation again in 2002. In the spring of 2004 and 2005, massive blooms of Asterionella spp. and Fragilaria crotonensis (diatoms) occurred, which resulted in sharp decreases in filtration capacity of Sakai WPP, taking slow sand filtration. Results of water analysis for the reservoir between 2003 and 2004 indicated that nutrients eluted from sediments during stratification periods were utilized for the blooms in the following springs. Since intake gates at five different depths enable us to conduct selective intake, we conducted hypolimnestic discharge; while Sakai WPP continued taking water with low turbidity and phytoplankton production, the lowest gates of Intake tower No.1 were also slightly opened in the middle of 2005. In April 2006, the lowest gate of Intake tower No. 2 was fully opened instead of the upper ones. Consequently, the scale of spring diatom blooms reduced after 2006. Nevertheless, rise in turbidity increased T-P, which resulted in massive blooms of Synedra spp. (diatoms) in 2009 when the water level was lowered to 8 m. This illustrated that this operation of the selective intake was not effective for conservation of the reservoir at low water levels.

Experience in Implementation of Systems Applied for Drainage Water Ion-Selective Purification from Radionuclides at Units 1,2 of Novovoronezh-2 NPP

ANRI ◽  
2020 ◽  
Vol 0 (4) ◽  
pp. 64-70
Author(s):  
Vladimir Povarov ◽  
Igor' Gusev ◽  
Sergey Rosnovsky ◽  
Dmitriy Statsura ◽  
Vladimir Kazansky ◽  
...  
Keyword(s):  
Water Purification ◽  
Drainage Water ◽  
Purification Method ◽  
Selective Sorbent ◽  
Iron Based ◽  
Purification Plant ◽  
Nickel Ferrocyanide ◽  
Satisfactory Quality

The article is dedicated to the assessment of the experience in drainage water purification from radionuclides using ion-selective purification method on Units 1,2 Novovoronezh-2 NPP. Application of an ion-selective sorbent based on nickel ferrocyanide, as well as the preliminary oxidation of corrosive origin radiongjuclides, allow to achieve a satisfactory quality of purification from Cs-134, Cs-137, Co-60, Co 58, Mn-54, Cr-51. However, this method turned out to be ineffective for drainage water purification from Be-7, Sb-124, Sb-125. The article presents a possible method for drainage water purification from Be-7, Sb-124, Sb-125 using an iron-based coagulant, prospects for the modernization of the ion-selective drainage water purification plant, as well as plans to improve methods for drainage water purification at Novovoronezh-2 NPP

AGEING MECHANISM OF PVDF FOLLOW-FIBER MEMBRANES USED IN WATER PURIFICATION PLANT

2019 ◽  
Vol 75 (7) ◽  
pp. III_341-III_350
Author(s):  
Yuki YONEZAWA ◽  
Takashi HASHIMOTO ◽  
Shinobu KAZAMA ◽  
Kumiko OGUMA ◽  
Kazuyoshi FUJIMURA ◽  
...  
Keyword(s):  
Water Purification ◽  
Fiber Membranes ◽  
Purification Plant

scholarly journals Deliberative architecture for smart sensors in the filtering operation of a water purification plant

2021 ◽  
Vol 1730 (1) ◽  
pp. 012088
Author(s):  
E. Mendoza ◽  
J. Andramuño ◽  
J. Núñez ◽  
I. Benítez
Keyword(s):  
Water Purification ◽  
Smart Sensors ◽  
Purification Plant

Effective Measures for CO2 Reduction Harnessing the Potential Water Energy Present in the Water Service Industry

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
Ohbuchi Yoshihiro ◽  
Sasaki Takanori ◽  
Sumitomo Hiroaki ◽  
Saito Susumu ◽  
Tanaka Yoshiaki
Keyword(s):  
Power Generation ◽  
Water Purification ◽  
Service Industry ◽  
Low Cost ◽  
Co2 Reduction ◽  
Clean Energy ◽  
Net Benefit ◽  
Private Company ◽  
Joint Project ◽  
Purification Plant

Sapporo Waterworks Bureau's (SWB's) measures for CO2 reduction started in 1982 with a hydropower project at the Moiwa Water Purification Plant (MWPP) (cap. 155,000 m3/day). Operation of the generator was temporarily discontinued in 2001 for full-scale reconstruction of the water purification plant (WPP); after the completion of the reconstruction, the power generation equipment was renewed, and the operation resumed as a joint project with a private company in 2007. Power generation is on-site since the hydropower generator within the MWPP area provides energy consumed at the MWPP and the adjoining Waterworks Museum. This power generation is expected to create an energy saving effect equivalent to 1,500 tons of CO2 and over 10 million yen of annual net benefit. In order to increase the usage rate of low-cost, clean energy like hydropower at the WPP, SWB has made a series of adjustments to the operating methods of the plant. Then, as a result, the generation covers 97% of the energy used on-site at present. Furthermore, SWB is considering introducing other hydropower facilities of this kind that harness water transmission energy from the Shiraikawa WPP (cap. 650,000 m3/day) to the major distribution reservoirs.

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