scholarly journals Evaluation of organic chloride precursor produced through contact oxidation-biological filtration process.

1985 ◽  
Vol 8 (4) ◽  
pp. 239-248 ◽  
Author(s):  
Harumi YAMADA ◽  
Isao SOMIYA
Keyword(s):  
Filtration Process ◽  
Biological Filtration ◽  
Contact Oxidation ◽  
Organic Chloride

Advanced treatment of sewage by pre-coagulation and biological filtration process

2003 ◽  
Vol 37 (17) ◽  
pp. 4259-4269 ◽  
Author(s):  
Taira Hidaka ◽  
Hiroshi Tsuno ◽  
Naoyuki Kishimoto
Keyword(s):  
Advanced Treatment ◽  
Filtration Process ◽  
Biological Filtration

Influence of Ammonia Nitrogen on Treatment of Groundwater Containing iron and Manganese in Aeration-Contact Oxidation Filtration Process

2012 ◽  
Vol 170-173 ◽  
pp. 2414-2418
Author(s):  
Yu Hua Zhao ◽  
Yan Feng Li ◽  
Wen Bo Zhang ◽  
Chun Na Zhang ◽  
Jin Xiang Fu ◽  
...  
Keyword(s):  
Water Treatment ◽  
Nitrogen Concentration ◽  
Great Influence ◽  
Ammonia Nitrogen ◽  
The Other ◽  
Iron Removal ◽  
Manganese Concentration ◽  
Filtration Process ◽  
Contact Oxidation ◽  
Iron And Manganese

Two different kinds of water were treated with aeration-contact oxidation filtration process. One was groundwater containing iron and manganese (GIM), the other was GIM polluted by ammonia (GAIM). The results showed that ammonia has almost no influence on iron removal, but has great influence on manganese. Under the condition of 1m/h filter velocity and 10 mg/L average ammonia nitrogen concentration of inlet，the outlet manganese concentration for GAIM was less than 0.1 mg/L after 315 days. When temperature dropped to 18°C below, the manganese concentration of effluent exceeded 0.1 mg/L. When average ammonia nitrogen concentration of inlet for GAIM dropped to 3.27 mg/L, the manganese concentration of outlet for GAIM was less than 0.1 mg/L in winter. And for GIM, the manganese concentration of outlet was less than 0.1 mg/L only after 52 days. Although the filter velocity increased gradually from 1 to 7 m/h, the manganese concentration of effluent was always less than 0.1 mg/L. Therefore, ammonia pollution in the groundwater greatly increases the difficulty of water treatment.

scholarly journals AOC removal and accumulation of bacteria in experimental sand filters

2005 ◽  
Vol 5 ◽  
pp. 17-32 ◽  
Author(s):  
W. A.M. Hijnen, ◽  
D. Van Der Kooij
Keyword(s):  
Tap Water ◽  
Microbiological Activity ◽  
Filtration Process ◽  
Sand Filters ◽  
Biological Filtration ◽  
Acetate Concentration ◽  
Assimilable Organic Carbon ◽  
Filter Bed ◽  
Reduction Capacity

Using small sand filets under well defined laboratory conditions, filtration experiments were performed with tap water supplemented with acetate. The objective of these experiments was to determine the effect of different acetate concentrations on (i) the removal of easily assimilable organic carbon (AOC) in the filter (ii), the clogging of the tiller and (iii) the bacteriological quality of the filtrate. The results of the experiments revealed that the reduction capacity of biological filtration processes for acetate is relatively high. Acetate removal resulted in an increased microbiological activity in the top layer (< 1cm) of the filter bed and accumulation of bacterial matter was observed at an influent AOC concentration as low as 0.005 mg of ac-C eq/l. Clogging of the filter bed occurred at an influent acetate concentration of 0.01 mg C/l. Based on these observations it was concluded that the AOC concentration of water used for infiltration in recharge wells should be less thon 0.01 mg ac-C eq/l. This level is similar to the level advised for biologically-stable drinking water. A linear relationship was found between the acetate removal in the experimental filters and the colony count in the filtrate. It was recommended that the AOC load in the final filtration process in water treatment therefore should be limited to prevent high colony counts in the filtrate, thus leading to the use of post disinfection.

scholarly journals Evaluation of Anaerobic Filter Bed-Biological Filtration Process with Physicochemical Phosphorus Removal Methods.

2002 ◽  
Vol 38 (1) ◽  
pp. 47-55 ◽  
Author(s):  
YASUHIRO YAMAMOTO ◽  
YUJI MIURA ◽  
MITSURU INOUE ◽  
NAOSHI FUJIMOTO ◽  
YUHEI INAMORI ◽  
...  
Keyword(s):  
Phosphorus Removal ◽  
Filtration Process ◽  
Biological Filtration ◽  
Anaerobic Filter ◽  
Filter Bed

METHODS AND ALGORITHMS FOR THE COMPLETE PROCESSING OF A POSTDETECTOR LOW-CONTRAST OPTICAL IMAGE

2018 ◽  
pp. 99-107
Author(s):  
V. V. Lavrov ◽  
R. S. Luchkin ◽  
O. I. Nemykin ◽  
M. E. Prokhorov ◽  
Yu. G. Ryndin ◽  
...  
Keyword(s):  
Optical Image ◽  
Structural Elements ◽  
Filtration Process ◽  
Low Contrast ◽  
Information Object ◽  
Detection Stage ◽  
Metric Structures ◽  
Spot 5 ◽  
Integrated Indicators ◽  
Complete Processing

Methods and algorithms for the complete processing of a post-detector low-contrast optical image (OI) of an unknown remote object obtained by ground-based optical means of observation under conditions of a complex background situation are considered. The purpose of processing is to separate and interpret at least with the help of the analyst, of the main constructive elements using the integrated indicators introduced in [6] and the characteristics of the analyzed OI, which are connected by the information, topological and metric structures of the OI. The stages of processing the OI include extracting the image-containing information object of the image portion (detection) and filtration of the OI, using recursive rank filtering. The final stages of processing include the segmentation of the OI and the allocation on it constructive elements using the apparatus of graph theory. An example of image processing of a Spot-5 spacecraft obtained in real conditions is given. It is shown that in this case at the detection stage it is possible to reduce the volume of information processed at subsequent stages by 8 times, in the filtration process to increase the compactness of the OI and to increase its connectivity in comparison with the post-detection OI. As a result of segmentation and allocation of constructive elements, three structural elements that can be interpreted as a spacecraft case and two remote panels can be identified with the analyst’s participation.

scholarly journals Optimization of filtration process management in hydrometallurgy

2021 ◽  
Vol 1047 (1) ◽  
pp. 012042
Author(s):  
P A Kustashev ◽  
L A Kazakovtsev ◽  
I P Rozhnov ◽  
I N Kirikov ◽  
E P Burmistrov
Keyword(s):  
Process Management ◽  
Filtration Process
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