Influence of microplate material on the sensitivity of growth inhibition tests with bacteria assessing toxic organic substances in water and waste water

1999 ◽  
Vol 14 (4) ◽  
pp. 424-428 ◽  
Author(s):  
Georg Gellert ◽  
Achim Stommel
Keyword(s):  
Waste Water ◽  
Growth Inhibition ◽  
Organic Substances ◽  
Toxic Organic Substances

Discharge of Stable Organic Substances from the Chemical Industries

1994 ◽  
Vol 29 (9) ◽  
pp. 179-185 ◽  
Author(s):  
Åke Undén
Keyword(s):  
Waste Water ◽  
Organic Substances ◽  
Waste Waters ◽  
Major Chemical

In a programme started in 1988, the waste water discharges from the major chemical industries in Sweden have been investigated. The primary objectives were to gather information on the major sources of such discharges and to initiate action so as to achieve significant reductions where required. In this paper the investigation programme is presented together with some early conclusions. As could be expected there are no simple common rules for these industries, each effluent should be considered as a separate problem. It was concluded that these waste waters were in most cases more toxic than was acceptable, and that further purifying measures were required in these cases.

Treatment of Alkaline Waste Water Generated by the Hydrolysis of Rice Husk

2013 ◽  
Vol 781-784 ◽  
pp. 2087-2090 ◽  
Author(s):  
Ludmila A. Zemnukhova ◽  
O.D. Arefieva ◽  
Anastasia A. Kovshun
Keyword(s):  
Waste Water ◽  
Electrochemical Oxidation ◽  
Rice Husk ◽  
Alkaline Hydrolysis ◽  
Waste Water Treatment ◽  
Oxygen Demand ◽  
Organic Substances ◽  
Silicon Compounds ◽  
Treatment Stage ◽  
Hydrolysis Of

This article shows the results of research on finding ways to purify waste water produced by alkaline hydrolysis of rice waste - rice husk. Two methods were used: baromembrane filtration and electrochemical oxidation of organic substances. It was found that in the results of baromembrane processing of hydrolyzate on the membranes mainly stay silicon compounds partially sorbing organic substances contained in the feedstock. Through the membranes there pass the major part of microbiologically oxidated organic matter, so its difficult to reach the required waste water treatment stage. The use of electrochemical oxidation of organic substances extracted by alkaline hydrolysis of rice husks into a solution allows more qualitatively treat the solution. A range of indicators (chemical oxygen demand, permanganate demand, polyphenols) evaluating the content of organic compounds in the desilicated solution showed that in order to remove them effectively enough electrolyte concentration of sodium chloride is 4 g L-1, formed by the desilication and dilution of the solution with the distilled water 1:10.

Elaboration of an Efficiency Indicator of Treatment Industrial Waste Water by Ozone

2018 ◽  
Vol 931 ◽  
pp. 954-959 ◽  
Author(s):  
Stanislav E. Alekseev ◽  
Daria A. Pipko
Keyword(s):  
Waste Water ◽  
Industrial Waste ◽  
Industrial Wastewater ◽  
Material Balance ◽  
Organic Carbon Content ◽  
Organic Substances ◽  
Purification Process ◽  
Industrial Waste Water ◽  
Experimental Researches ◽  
Ozonation Process

While developing the technology of using ozone for the destruction of organic substances in industrial wastewater, it is important to determine the required dose of ozone and the period of water treatment. In some cases, for example, when the dyes are destroyed in textile sewage, the color reduction occurs earlier than the decomposition of the organic matter of the dyes. Thus, there is a need to control the purification process by several indirect indicators, such as oxidability, total organic carbon content and etc. There is also the difficulty in determining the required dose of ozone for the decomposition of contaminants. We carried out experimental researches and examined the material balance of the ozonation process. A generalized method for determining the consumption of ozone in the oxidation of contaminants in sewage waters is proposed. The indicator "chemical demand of ozone" is used. During the trial ozonation of waste water the method allows to obtain the dependence of ozone consumption on the processes of pollution destruction and to determine the required specific dose of ozone for the destruction of contaminants.

scholarly journals Investigation of the Kinetic Regularities of the Process of Biodegradation of Betaine Surfactant by Bacteria of the Genus Pseudomonas

2021 ◽  
Vol 11 (19) ◽  
pp. 8939
Author(s):  
Anastasia S. Burlachenko ◽  
Olesya V. Salishcheva ◽  
Lyubov S. Dyshlyuk ◽  
Alexander Y. Prosekov
Keyword(s):  
Kinetic Data ◽  
Industrial Wastewater ◽  
Surfactant Concentration ◽  
Time Interval ◽  
Organic Substances ◽  
High Concentration ◽  
First Order ◽  
High Concentrations ◽  
Biological Decomposition ◽  
Toxic Organic Substances

Surfactants are extremely common organic compounds that enter the environment in large quantities in the form of household and industrial wastewater. The toxicity of surfactants for biological systems, the high concentration of substances and the duration of the bioremediation process of polluted ecosystems requires improving the biotechnology of microbial wastewater treatment for surfactants. The purpose of this work is to study the kinetic laws of the reaction of the biological decomposition of betaine surfactants. Pseudomonas bacteria were used as bio-destructors of the surfactants. Kinetic data were obtained to create the possibility of further optimization of research on the biodegradation of toxic organic substances. The strains that were promising destructors of cocamidopropylbetaine were selected. The toxicity of high concentrations of surfactants in relation to microorganisms of the genus Pseudomonas was proven. Safe values of the surfactant concentration for conducting biodegradation tests were found. A kinetic model of the biodestructive process was constructed. It proves that the processes of biodegradation are described by a kinetic equation of the first order. With the derived equation, it is possible to determine the time interval of biodegradation of cocamidopropylbetaine to the specified values by means of mathematical calculations.

scholarly journals Physicochemical treatment of waste water from complex organic substances

2021 ◽  
Vol 815 (1) ◽  
pp. 012004
Author(s):  
B S Ksenofontov ◽  
R A Taranov ◽  
M S Vinogradov ◽  
E V Senik
Keyword(s):  
Waste Water ◽  
Organic Substances ◽  
Physicochemical Treatment ◽  
Complex Organic
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