J. Perkowski

Bio: J. Perkowski is an academic researcher from University of Łódź. The author has contributed to research in topics: Wastewater & Hydrogen peroxide. The author has an hindex of 12, co-authored 30 publications receiving 447 citations.

Application of Ozone in Textile Wastewater Treatment

Abstract: Textile wastewaters are known to be highly resistant to biodegradation under both natural and wastewater treatment plant conditions. However, ozonation can be used to increase the biodegradability of the biologically resistant compounds. The combined method of ozonation and subsequent biodegradation of both synthetic and real textile wastes was explored in laboratory-scale studies. Two kinds of industrial wastes were simulated for effluents from dyehouse and washing machines. Upon determining the ozonation conditions of synthetic wastes, the real industrial wastes were investigated. The real textile wastewater was taken from textile factories, located in odź , Poland, from subsequent stages of textile processing; dyeing, washing, rinsing and from an equalizer tank. Ozonation was carried out in a lab-scale bubble column sparged reactor, while the biological degradation proceeded in a trickle bed biofilter.

Advanced Oxidation of Textile Wastewaters

Abstract: Model dyeing and laundering wastewaters produced during two basic technological operations of the textile industry were subjected to treatment by advanced oxidation processes (AOPs). The following agents were used: ozone (O3), hydrogen peroxide (H2O2) and UV radiation. They were applied separately and in all possible combinations: O3 + UV, O3 + H2O2, UV + H2O2, as well as all three at the same time: O3 + UV + H2O2. Effluents before and after the treatment were analyzed according to requirements of the Polish Standards that included pH, color threshold, COD and concentration of anionic and non-ionic surfactants. Ozonation was carried out in a lab-scale bubble column reactor with a centrally located UV burner. The most effective version of AOPs proved to be the simultaneous use of all three agents. In the case of such treatment of dyeing wastewaters nearly complete discoloration and full decomposition of surface-active substances were obtained at 80% reduction of COD. A similar tendency was observe...

Germicidal Properties of Ozonated Sunflower Oil

Abstract: The aim of this work was to establish the minimal inhibition concentration (MIC) of ozonated sunflower oil for various microorganisms. To determine the influence of the ozonated medium on the growth of bacteria Bacillus subtilis, Escherichia coli and yeast Candida albicans the Petri dish method was used. Chemical and physical properties of ozonated sunflower oil were additionally studied. Microbiological studies proved that these microbes have various sensibility against ozonated oil. The most resistant are gram-negative bacteria E. coli and the yeast C. albicans. Gram-positive bacteria, B. subtilis turned out to be less resistant, because no growth was observed for preparation with an ozone dose of 200 mgO3/g oil.

Effects of gamma radiation on the mechanical properties of and susceptibility to biodegradation of natural fibers

Abstract: The effect of gamma radiation on the mechanical properties and surface structure of woven fabrics made of cotton, flax, and silk fibers was investigated. It was found that small radiation doses (up...

Decolouration of Real Textile Wastewater with Advanced Oxidation Processes

Abstract: The efficiency rates of advanced oxidation processes for the decolouration of different types of textile wastewater taken from textile plants in Łodź were compared on the basis of the results obtained. The wastewater had different compositions and concentrations of pollutants, and the dyeing wastewater was of intense colour. The advanced oxidation processes with the use of ozone, gamma radiation, hydrogen peroxide and UV radiation gave good decolouration results. The efficiency of colour removal depended on the type of wastewater and concentration of pollutants contained therein. The effects of wastewater type, pollutant concentrations, the pH of the solution, process temperature and the amount of oxidising agents, in particular of hydrogen peroxide, on the yield of decomposition of dyes during ozonation were investigated. As a result of the treatment, complete decolouration of the wastewater was obtained. Considering both the experimental results and technological problems, it can be presumed that advanced oxidation with a simultaneous application of ozone and hydrogen peroxide is a very promising technique for potential industrial implementation. Through primary and secondary products of water radiolysis, the ionising radiation causes the decomposition of organic compounds contained in water. It was found that the presence of oxygen in the solution had a positive effect on the rate of destruction process due to its contribution in the chain processes of

Treatment and Reuse of Wastewater from the Textile Wet-Processing Industry : Review of Emerging Technologies

Abstract: New ecolabels for textile products and tighter restrictions on waste- water discharges are forcing textile wet processors to reuse process water and chemicals. This challenge has prompted intensive research in new advanced treatment technologies, some of which currently making their way to full-scale installations. These comprise polishing treatments such as -ltration, chemical oxidation and specialized Nocculation techniques and pre-treatment steps includ- ing anaerobic digestion, -xed--lm bioreactors, FentonIs reagent oxidation, elec- trolysis, or foam Notation. Though several of these new technologies are promising in terms of cost and performance, they all su†er limitations which require further research and/or need broader validation. A segment of the research deals with the separate handling of speci-c sub-streams such as dyebath effluents to which membrane -ltration is sometimes applied. The main limitation of this approach is the treatment of the concentrate stream. The spectrum of available technologies may, in the future, be further broadened to include oxidation, specialized bio-sorptive processes, solvent extrac- fungi/H 2 O 2 -driven tion, or photocatalysis. 1998 SCI ( J. Chem. T echnol. Biotechnol. 72, 289E302 (1998)

Degradation of dyes from aqueous solution by Fenton processes: a review

Abstract: Several industries are using dyes as coloring agents. The effluents from these industries are increasingly becoming an environmental problem. The removal of dyes from aqueous solution has a great potential in the field of environmental engineering. This paper reviews the classification, characteristics, and problems of dyes in detail. Advantages and disadvantages of different methods used for dye removal are also analyzed. Among these methods, Fenton process-based advanced oxidation processes are an emerging prospect in the field of dye removal. Fenton processes have been classified and represented as “Fenton circle”. This paper analyzes the recent studies on Fenton processes. The studies include analyzing different configurations of reactors used for dye removal, its efficiency, and the effects of various operating parameters such as pH, catalyst concentration, H2O2 concentration, initial dye concentration, and temperature of Fenton processes. From the present study, it can be conclude that Fenton processes are very effective and environmentally friendly methods for dye removal.

Removal of Synthetic Textile Dyes From Wastewaters: A Critical Review on Present Treatment Technologies

Abstract: Azo dyes represent the largest class of industrial colorants. These are no longer used only for the coloration of textiles, plastics, paints, inks, and lacquers, but rather serve as key components in high-tech applications such as optical data storage, reprographics, display devices, dye-sensitized solar cells, energy transfer cascades, light-emitting diodes, laser welding processes, or heat management systems. Azo dyes are also of growing importance in the medical and biomedical fields. In most of these applications, the color is largely irrelevant and it is the ability of the colorants to absorb visible electromagnetic radiation with high efficiency, or other functional property, that is exploited. With the growing awareness and environmental concerns, it is imperative that the hierarchy of reduce, reuse, and degrade be adopted and measures be taken to remove color from the industrial discharge. The present review (a) embodies a comparison of the present decolorization/degradation techniques for water-s...