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.

The new technology of waste water treatment by using bioreactors with bio membranous movable bed – biochips

2020 ◽  
Vol 10 (3) ◽  
pp. 276-292
Author(s):  
Maria Y. Savostyanova ◽  
◽  
Lidia А. Norina ◽  
Arina V. Nikolaeva ◽  
◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Water Resources ◽  
Waste Water Treatment ◽  
Combined Treatment ◽  
Research Work ◽  
Pollution Level ◽  
Waste Waters ◽  
Treatment Facilities ◽  
Movable Bed

Retaining of water resources quality is one of the global ecological problems of the modern time. The most promising direction in solving the problem of water resources protection is the reduction of negative environmental influence of waste water from production facilities by upgrading the existing water treatment technologies. To treat utility water, technical and rain water from site facilities of Transneft system entities, the specialists developed and approved standard technological diagrams, which are used in producing treatment facilities. The standard technological diagrams provide for all necessary stages of waste water treatment ensures the reduction of pollution level to normal values. However, during operation of treatment facilities it was established, that to ensure the required quality of waste water treatment with initially high levels of pollution, the new technological solutions are necessary. The author presents the results of scientific-research work, in the context of which the best affordable technologies were identified in the area of the treatment of waste water with increased content of pollutants and non-uniform ingress pattern. On the basis of the research results the technical solutions were developed for optimization of operation of existing waste water treatment facilities by means of using combined treatment of technical and rain waters and utility waste waters and applying bioreactor with movable bed – biochips. The use of bioreactor with movable bed allows the increase in the area of active surface, which facilitates increase and retention of biomass. Biochips are completely immersed into waste waters, and biofilm is formed on the entire volume of immersion area, facilitating retention of biomass and preventing formation of sediments. Due to mixing the floating device with biofilm constantly moves along the whole area of bioreactor, and, in doing so, speeds up biochemical processes and uniformity of treatment. The advantages of a bioreactor with movable bed – its active sludge durability against increased and changing pollutant concentrations, change of waste water temperature and simplicity of application – ensured the possibility of its use for blending utility waters, technical and rain waters.

Composting of Sewage Sludge of Moscow Waste Water Treatment Plants Using Recycling Filler

2007 ◽  
Vol 2 (1) ◽  
Author(s):  
D.A. Danilovich ◽  
M.N. Kozlov ◽  
V.I. Sklyar ◽  
Yu.A. Nikolaev ◽  
N.M. Shchegolkova ◽  
...  
Keyword(s):  
Waste Water ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Maximum Temperature ◽  
Waste Waters ◽  
Organic Additives ◽  
Organoleptic Properties ◽  
Water Treatment Plants ◽  
Waste Water Treatment Plants ◽  
The City

This work demonstrates a possibility of composting of municipal waste waters sludge (WWS) digested during 5-7 days, of the Kuryanovo waste water treatment plants (the city of Moscow) without the use of traditional organic additives – sawdust, peat, thatch. As a recycling filler (repeatedly used), enhancing the porosity of the composted mixture, ribbed polyethylene spheres (∅=8 cm) and wood chips (having dimension of 5-10 cm) were used. Composting was performed efficiently in both cases, however, the use of wood ships had technological and economical advantages. The process of composting was carried out during 2-4 weeks and was composed of classical phases of active heating (a rate of 0.2-0.3oC/h was obtained), maintaining of maximum temperature during 1-2 days, and cooling down to the ambient temperature. During the course of composting, a product was obtained, having attractive organoleptic properties, suitable for application in municipal laying-out of greenery.

scholarly journals Pathogenic micro-organisms in waste waters from daiies

2000 ◽  
Vol 18 (No. 5) ◽  
pp. 170-174
Author(s):  
P. Navrátilová
Keyword(s):  
Waste Water ◽  
Listeria Monocytogenes ◽  
Activated Sludge ◽  
Cleaning Process ◽  
Waste Waters ◽  
Excess Sludge ◽  
Salmonella Spp ◽  
Potential Health ◽  
Treated Water ◽  
Micro Organisms

Waste waters from dairies were tested for the presence of bacterial pathogens – Listeria monocytogenes, Staphylococcus aureus and Salmonella spp. The prevalence of bacteria was investigated in each stage of the cleaning process (activated sludges systems) too. Two hunder samples of raw waste water, activated sludge, returned activated sludge, excess sludge and treated water from 14 dairies were tested. The samples were all negative for Salmonella spp. From a total of 102 (51%) strains Listeria spp., Listeria inoccua 95 (47.5%) and Listeria monocytogenes 7 (3.5%) were identified. 47 samples were positive for S. aureus. L. monocytogenes were detected in raw waste water 1 (1.6%), in activated sludge 3 (5.5%), in excess sludge 1 and in treated water 2 (3.1%). S. aureus were detected in raw waste water 14 (22.6%), in activated sludge 23 (41.8%), in excess sludge 1 and in treated water 8 (12.3%). These results demonstrate a prevalence of L. monocytogenes and S. aureus in waste waters from dairies. During the cleaning process pathogenic bacteria were not devitalized. The excess sludge and treated water including pathogenic micro-organisms represent a potential health hazard.

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.

scholarly journals Introduction of the CP concept in a Factory for the production of welding electrodes Piva, Pluzine

2009 ◽  
Vol 15 (1) ◽  
pp. 53-56
Author(s):  
M. Vukcevic ◽  
D. Blecic ◽  
Z. Blecic ◽  
D. Cabarkapa
Keyword(s):  
Waste Water ◽  
Raw Materials ◽  
Cleaner Production ◽  
Waste Waters ◽  
Technical Modifications ◽  
Coated Electrodes

The new concept of Cleaner Production (CP) was recently introduced in the Factory for the production of welding electrodes (FEP) in Pluzine, by following some activities, raw materials and products. By the identification of some sub-processes with CP opportunities, focus points were identified and subjected to some technical modifications and innovations. The most significant results were obtained regarding waste waters, through the modifications of existing waste water generation and a possible switch to an other technology, the reduction of K-silica waste through a technological modification, a system of powder transport, as well as the production of coated electrodes.

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 Ecological/economical and Organizational/legal Problems of Transition to the System of Water Quality Regulation on the Basis of the Best Available Techniques

2014 ◽  
pp. 120-130
Author(s):  
Keyword(s):  
Waste Water ◽  
Water Quality ◽  
Water Treatment ◽  
Waste Water Treatment ◽  
Waste Waters ◽  
Urban Waste ◽  
Best Available Techniques ◽  
Treatment Techniques ◽  
Quality Regulation ◽  
Legal Problems

Analysis of possibilities of the existing urban waste water treatment techniques has been presented. It is mentioned that the problem of the beat available techniques choice is inseparably linked with correction of the current normalizing system in terms of composition of not only treated waste waters but also in terms of requirements to enterprises that dispose water into a sewage network.

scholarly journals A novel advanced technology for removal of phenol from wastewaters in a Ventury reactor

2019 ◽  
Vol 23 (3 Part B) ◽  
pp. 1935-1942 ◽  
Author(s):  
Sandra Petkovic ◽  
Borivoj Adnadjevic ◽  
Jelena Jovanovic
Keyword(s):  
Waste Water ◽  
Cavitation Number ◽  
Hydrodynamic Cavitation ◽  
Advanced Technology ◽  
Phenol Removal ◽  
Waste Waters ◽  
Coal Processing ◽  
Technological Parameters ◽  
Novel Technology ◽  
Temperature Time

Phenol is a major pollutant in the waste waters coming from coal processing. Hydrodynamic cavitation presents a novel technology for phenol removal from waste waters. Hydrodynamic cavitation device with a cavitator of Ventury type for waste water purification was constructed. The hydraulic characteristic of the device were determined: the dependences of flow and cavitation number on inlet pressure. The effects of cavitation number, phenol concentration, pH, temperature, time, and quantity of added H202 on the degree of phenol reduction in the waste water was investigated. The optimal technological parameters of the investigated cavitation purification process of waste waters from phenol were determined.

Sign in / Sign up

Export Citation Format

Share Document