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    Experience in using a pilot plant for the treatment and reuse of laundries wastewater: electroflotocoagulation and adsorption
    (Springer, 2022) Dimoglo, A.; Veli, S.; Konukman, A. E. S.; Gunenc, P.; Şeker, Mehmet G.; Dinç, O.; Arslan, A.
    The article considers the issues of purification and reuse of wastewater from industrial laundries by the electroflotocoagulation method, followed by additional purification on active charcoal. For this purpose, the dependence of the degree of wastewater treatment on the surface-active substances, color, and turbidity has been investigated. Treatment time, pH and current density have been selected as variable parameters. Along with this, the issue of heat recovery and its use for heating purified water when it comes to reuse have been studied. The study was carried out using a pilot plant with a volume of 500 L, consisting of two modules. The first module is associated with the transfer of heat from the wastewater through the heat exchanger to purified water for reuse. The second module is associated with combined wastewater treatment. 75-85% of the removal of the contaminants is achieved in the pH range of 4.0-5.5 and a wastewater treatment time of 11 min that is associated with the optimal amount of aluminum ions generation in the reactor. The dependency between the efficiency of removing pollutants and current density showed that at the 80 A/m(2), 80% of synthetic surfactants and color, so as 85% of turbidity are being removed. A deeper post-treatment of water in the adsorption column following the electroflotocoagulation reactor made it possible to achieve removal of synthetic surfactants and color up to 95%, and turbidity up to 97%. The percentage of energy savings was about 50%.
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    Toxicity, mutagenicity and stability assessment of simply produced electrolyzed water as a wound healing agent in vitro
    (Sage Publications Ltd, 2021) Reis, R.; Sipahi, H.; Dinc, O.; Kavaz, T.; Charehsaz, M.; Dimoglo, A.; Aydin, A.
    Over the last decade, electrolyzed water (EW) produced by salt and tap water has gained importance due to its antimicrobial effects. Regarding to chlorine-based compounds, EW also used in post-harvest safety of food processing and sterilization of surfaces. The latest studies suggested that EW might act as wound healing agent due to anti-infective and cell proliferative properties. In this study, we evaluated acute contact cytotoxicity in L929 mice fibroblast cells and wound healing activity of EWsin vitro.In addition, mutagenic activity was evaluated by Ames test with and without metabolic activation by S9 fraction and the stability profile of freshly prepared EWs has been followed up. According to the results, strong acid (StAEW) and mixed EW (MEW) showed dose-dependent cytotoxicity due to possible high HOCl concentration, while slightly acidic and catholyte EW (CEW) were not cytotoxic even applied directly for 30 sec. Further, StAEW and CEW showed a significant increase in L929 cell migration in scratch assay. Likewise, with/ without metabolic activation, neither of EWs had shown mutagenic profile in TA 98 and TA100 strains ofSalmonella typhimurium.Follow-up of ORP (oxidation-reduction potential), pH and FCC (free chlorine concentration) showed that temperature and light were important storage conditions to maintain a stable profile particularly for ORP and FCC, which are the most important indicators for biological activity of EW. According to the present findings, it can be suggested that particularly StAEW, may represent a valuable wound healing agent with an achievable, economical and easy production system when stored under proper conditions.