scholarly journals Regularities of low-waste technology of wastewater treatment by coagulation method

2008 ◽  
Vol 2 (2) ◽  
pp. 133-138
Author(s):  
Iryna Kosogina ◽  
◽  
Igor Astrelin ◽  
Natalya Klimenko ◽  
Andriy Kontsevoy ◽  
...  
Keyword(s):  
Experimental Data ◽  
Wastewater Treatment ◽  
Kinetic Equation ◽  
Sulphuric Acid ◽  
Acid Dissolution ◽  
Wastewater Purification ◽  
Surface Active ◽  
Active Substances

Mechanisms of wastewater purification from surface-active substances and of sulphuric acid dissolution of iron-containing sludge formed during the previous process have been established. Kinetic regularities of metal-containing sludge dissolution in sulphuric acid have been investigated. Kinetic equation which adequately presents the experimental data has been proposed; constants of this kinetic equation have been calculated.

Understanding the Role of Surface Active Substances in Flotation Deinking Mills by Coupling Surfactant and Ink Balance With Process Simulation

TAPPI Journal ◽  
2010 ◽  
Vol 9 (2) ◽  
pp. 31-39
Author(s):  
Davide Beneventi ◽  
Elisa Zenob ◽  
Bruno Carréb ◽  
Jérémy Allixb ◽  
Patrice Nortiera ◽  
...  
Keyword(s):  
Experimental Data ◽  
Process Simulation ◽  
Raw Materials ◽  
Mass Balances ◽  
Second Stage ◽  
Functional Additives ◽  
Paper Sizing ◽  
Surface Active ◽  
Active Substances

Surfactants are largely present in papermaking/recycling processes. They are added intentionally or come with raw materials or process/functional additives. Once they have reached the process, they build-up in the circuits and, depending on their surface activity and concentration, they can have adverse effects on deinking and on the whole papermaking process, such as excessive frothing, depression of ink floatability, and paper sizing/retention difficulties. In this paper, the removal of apparent surface active chemicals (ASAASAASAC) is first evaluated in different flotation deinking mills through mass balances using surface tension measurements and a specific methodology. Mill data show that, in two-stage deinking lines, ASAASAASAC are slightly concentrated in the second stage, contributing to an increase in pulp frothing behavior, in flotation loss, and in some cases to a low ink removal efficiency. Trends observed in deinking mills are then interpreted using experimental data obtained at the laboratory scale in the presence of a model surfactant, and by process simulation. The effect of ASAASAASAC concentration on the efficiency of the flotation deinking process is explained in terms of their effect on particle and water transport sub processes, namely, flotation, entrainment, frothing, and drainage.

Wastewater Treatment in Stabilization Ponds with Higher Aquatic Plants

1987 ◽  
Vol 19 (12) ◽  
pp. 287-288
Author(s):  
V. I. Tsiprijan ◽  
V. V. Kravets
Keyword(s):  
Wastewater Treatment ◽  
Aquatic Plants ◽  
Waste Water Treatment ◽  
Simultaneous Increase ◽  
Industrial Waste Water ◽  
Higher Aquatic Plants ◽  
Stabilization Ponds ◽  
Surface Active ◽  
Active Substances ◽  
Vitamin Production

Higher aquatic plants (HAP) provide more effective tertiary wastewater treatment in biological ponds. They also accelerate the clean-up process with simultaneous increase of hydraulic loading. There was observed not only high removal efficiency for domestic organics, but also for various universal pollutants such as oil, synthetic surface active substances and phenols. Our findings have demonstrated that HAP stabilization ponds may be used successfully for industrial waste water treatment. We have also shown it expedient to apply the method in biological, biochemical and vitamin production plants and sugar refineries. HAP of reed, cane and rush proved to be the most effective plants to use.

Surface Active Substances in the Chinchilla Tubotympanum: a Biochemical Study

1991 ◽  
Vol 111 (3) ◽  
pp. 1097-1104
Author(s):  
James Coticchia ◽  
Frederick Heiselman ◽  
Raouf Gharbo ◽  
Thomas Demaria ◽  
David Lim
Keyword(s):  
Biochemical Study ◽  
Surface Active ◽  
Active Substances

Influence of surface active substances on AKD sizing

2005 ◽  
Vol 20 (2) ◽  
pp. 253-258 ◽  
Author(s):  
Elisa Zeno ◽  
Bruno Carré ◽  
Evelyne Mauret
Keyword(s):  
Surface Active ◽  
Active Substances

scholarly journals The possible role of the Surface Active Substances (SAS) in the airborne transmission of SARS-CoV-2

2021 ◽  
pp. 111215
Author(s):  
Irena Ciglenečki ◽  
Palma Orlović-Leko ◽  
Kristijan Vidović ◽  
Viša Tasić
Keyword(s):  
Airborne Transmission ◽  
Surface Active ◽  
Active Substances

The kinetics of the penetration of some representative anthelmintics and related compounds into Ascaris lumbricoides var. suis

Parasitology ◽  
1949 ◽  
Vol 39 (3-4) ◽  
pp. 281-290 ◽  
Author(s):  
A. R. Trim
Keyword(s):  
Ascaris Lumbricoides ◽  
Homogeneous Layer ◽  
Outermost Layer ◽  
Basic Group ◽  
Rate Of Penetration ◽  
Surface Active ◽  
Main Barrier ◽  
Kinetics Of ◽  
Related Compounds ◽  
Active Substances

1. The rate of penetration of some representative drugs into Ascaris lumbricoides var. suis has been measured.2. The series of 4-n-alkyl resorcinols shows a typical homologous series effect.3. l-Nicotine penetrates relatively slowly.4. Its rate of penetration is greatly influenced by the extent of dissociation of its methyl pyrrolidine basic group.5. The rate of penetration of nicotine is greatly accelerated in the presence of some surface active substances.6. Chloroform is the most rapidly penetrating substance studied, and its penetration is not significantly influenced by the presence of proteins, carbohydrates and fats and their products of digestion.7. An analysis of the experimental results shows that the outermost layer of the cuticle of Ascaris is probably the main barrier to penetration. It behaves as if it were a thin; homogeneous layer of lipoid.8. The significance of these results in the study of anthelmintics is assessed.

Sign in / Sign up

Export Citation Format

Share Document