In this study, the chemical oxygen demand (COD) and the total organic carbon content (TOC) in biodiesel wastewater iron and aluminum electrodes arranged in a bipolar position. In the EC of the biodiesel wastewater, the effects of the supporting electrolyte, initial pH, electrolysis time and current density were examined. The results showed that the majority of the pollutants in the biodiesel wastewater were effectively removed when the iron or aluminum electrodes were used as a sacrificial anode. The highest COD and TOC removal efficiencies were successfully obtained with the iron electrode. COD removal efficiencies are 91.74 and 90.94% for iron and aluminum electrode, respectively. In the same way, TOC removal efficiencies were obtained as 91.79 and 91.98% for the iron and aluminum electrodes, respectively, at initial pH of 6, the current density of 0.3226 mA/cm 2 , NaCl concentration 1 g/L and 1 min of operating time.
Biyodizel atıksuları yüksek miktarda yağ, metanol, sabun ve gliserin içermektedir.Biyodizel üretiminin yaygınlaşmasının önündeki en büyük engellerden biri içerdiği yüksek kirlilik yükü nedeniyle geleneksel arıtma yöntemleri kullanılarak arıtılamamasıdır ve durum araştırmacıların oldukça ilgisini çekmektedir. Bu çalışmanın ana amacı, transesterifikasyon yöntemiyle üretilen biyodizel atıksularının laboratuvar ölçeğinde elektrokoagülasyon yöntemi ile kesikli bir reaktörde arıtılabilirliğinin incelenmesidir. EC prosesinde, başlangıç atıksu pH değeri 6, tuz miktarı 0,5 g/L, akım yoğunluğu 0,7 mA/cm 2 ve elektroliz süresi 2 dakika belirlenmiştir. 2 dakikalık elektrokogülasyon prosesi sonucunda %64,2 MeOH ve %95,8 KOİ giderme verimleri elde edilmiştir. Bu sonuçlara göre MeOH ve KOİ gideriminde işletme boyunca elektrokoagülasyon yöntemi daha yüksek miktarda MeOH ve KOİ giderimi sağlanmaktadır.
Biodiesel wastewaters contain high amounts of oil, methanol, soap and glycerin. These wastewaters pollutant concentrations as chemical oxygen demand (COD), total organic carbon (TOC), glycerin and MeOH are fluctuating in the ranges of 250,000-450,000 mg/L, 54,000-110,000 mg/L, 800-1,500 mg/L, and 6,000-15,000 mg/L, respectively. Biodiesel wastewaters lead to blockage of oil drainage systems and reduction of biological activity in biological treatment systems. The purpose of this study was to treat wastewater by ozonation after the electrocoagulation process as pre-treatment. In the ozonation process, the initial wastewater pH value was 13.9, ozone dose was 1.5g/L h, reaction time was 7 h and reaction temperature was 45°C. As a result of 7 h of ozonation, 98.64% of COD, 97.48% of TOC and 99.37% of MeOH removal efficiencies achieved. With these results, biodiesel waste water can be discharge to into the receiving environment according to standards.
When the textile industry wastewater volume and considering the composition appears to be one of the most environmentally hazardous industries. Due to textile dyeing industry wastewater's basic properties, additional precautions are required besides conventional wastewater treatment to remove color. The most basic approach is to remove the wastewater colour and break down the chromophores and double bonds that make up the color by oxidative means. In this study, the treatability of wastewater containing Reactive Yellow 145 (RY 145) dyestuff by ozonation process has been investigated. The initial concentration of the wastewater containing RY 145 is 50 mg / L. In the study, pH, O3 dose and reaction time parameters have been studied in RY 145 dye removal. The most appropriate removal of RY 145 from wastewater have occurred at pH 5, 0.05 g / L.h O3 dose and 10 minutes reaction time. The removal efficiency of RY 145 has obtained as 99.07% under optimum conditions.
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