Effects of 2-chlorophenol and 2,4,6-trichlorophenol on an activated sludge sequencing batch reactor

Doskaliyev, D.; Poulopoulos, Stavros G.; Yeshmuratov, Abilmansur; Aldyngurova, F.Zh.; Zorpas, Antonis A.; Inglezakis, Vassilis J.

doi:10.5004/dwt.2018.23065

Cited by 6 publications

(4 citation statements)

References 21 publications

(21 reference statements)

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“…The total carbon content was 1080 mg L -1 , 95% organic and 5% inorganic. It is a typical non-toxic and biodegradable wastewater that has been used as substrate to examine the effect of the presence of toxic compounds on the efficiency of wastewater treatment technologies [26,27]. Fresh stock solutions were prepared every three days.…”

Section: Methodsmentioning

confidence: 99%

Photocatalytic treatment of organic pollutants in a synthetic wastewater using UV light and combinations of TiO2, H2O2 and Fe(III)

et al. 2019

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In this study, the photocatalytic treatment of an organic wastewater with/without phenolic compounds by means of ultraviolet irradiation, titanium dioxide and hydrogen peroxide was examined in an annular photoreactor. Specifically, the effect of initial total carbon concentration, catalyst loading and H 2 O 2 amount on the removal of total carbon was first examined in the case of a synthetic organic wastewater. The influence of partial carbon substitution by phenol, 2-chlorophenol, 2,4-discholophenol, trichlorophenol, and 4-nitrophenol on total carbon removal and target compounds’ conversion was studied keeping constant the initial organic carbon load. It was shown that the process applied was effective in treating the wastewater for initial total carbon 32 mg L -1 , 0.5 g L -1 TiO 2 , and 66.6 mg L -1 H 2 O 2 . Applying UV/TiO 2 and UV/H 2 O 2 , 58% and 53% total carbon removals were achieved, respectively, but combining TiO 2 and H 2 O 2 did not result in a better performance in the case of the synthetic wastewater without any phenolic compounds. In contrast, when a phenolic compound was added, the addition of H 2 O 2 was beneficial, eliminating the differences observed from one phenolic compound to another. The total carbon removals observed were lower than the corresponding final conversions of the target phenolic compounds. Finally, the electric energy per order values were calculated and found to range in 52–248 kWh/m 3 /order, being dependent from the process applied and the phenolic compound present in the wastewater.

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Section: Methodsmentioning

confidence: 99%

Photocatalytic treatment of organic pollutants in a synthetic wastewater using UV light and combinations of TiO2, H2O2 and Fe(III)

et al. 2019

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“…In a recent study with a similar synthetic wastewater, Doskaliyev et al 46 . evaluated the influence of air striping by using SBR, and after 21 h of intensive aeration, they reported 43.9% TC removal, as well as 29.4% and 10.5% removal of the 2‐chlorophenol and 2,4,6‐trichlorophenol, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…To evaluate the impact of pharmaceuticals on the efficiency of biological treatment of wastewater, the exact compositions of the synthetic wastewater was derived from the average concentration of actual municipal wastewaters 43,44 and was used in the previous works 10,45,46 . The average TC, TN, and ammonium concentrations in the final feed solution were 243.5 ± 49.8, 28.4 ± 5.7, and 11.4 ± 3.6 mg/L, respectively.…”

Section: Methodsmentioning

confidence: 99%

The effect of caffeine, metronidazole, and ibuprofen on continuous flow activated sludge process

Kanafin

Kakimov

Адамов

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND The aim of this work was to study the biological treatment of a synthetic wastewater containing emerging contaminants. The 95‐day experiment was conducted in an 81 L continuous flow conventional activated sludge apparatus consisting of anoxic and aerobic reactors with internal recycling, and a clarifier with activated sludge recycling. Real activated sludge from the municipal wastewater treatment plant in the Nur‐Sultan city was used. The degradation efficiencies of caffeine, metronidazole, and ibuprofen in the synthetic wastewater were studied either separately or in combination. RESULTS When treated separately at the concentration of 30 mg/L, the degradation of caffeine and ibuprofen was up to 100%, while the degradation of metronidazole was in the range of 12–27%. Caffeine and ibuprofen inhibited the nitrification process, while the presence of metronidazole in the system suppressed the activity of denitrifying microorganisms. The biological treatment of the synthetic wastewater containing all three compounds (at the concentration of 10 mg/L each) resulted in degradation of caffeine and ibuprofen up to 100%, and 56% in the case of metronidazole. As both nitrification and denitrification processes were affected, the total nitrogen removal was significantly reduced from 53% to 22%. CONCLUSION Complete degradation of caffeine and ibuprofen, and partial degradation of metronidazole were observed in a synthetic wastewater using the activated sludge process. As the presence of emerging pollutants in a wastewater affects the general efficiency of the wastewater treatment plants, other physical or chemical pre‐treatment should be utilized to minimize the harmful effect of contaminants on the biological processes. © 2021 Society of Chemical Industry

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“…The stock solution is prepared for each experiment including (potassium hydrogen carbonate, sodium hydrogen carbonate, Bacterial peptone, Glucose anhydrous, and Beef extract broth) as shown in Table 1. A typical biodegradable and nontoxic wastewater has been utilized as a substrate to measure its effect of treatment methods (Wilson et al, 1997;Doskaliyev et al, 2018). Under various operational conditions, TUT was used in a photo reactor to analyze synthetic wastewater with different concentrations of total organic carbon.…”

Section: Methodsmentioning

confidence: 99%

Removal of Organic Pollutants from Wastewater Using Different Oxidation Strategies

Mohammed,

Fajri

2023

J. Ecol. Eng.

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Many countries use nontraditional methods to treat wastewater, especially those with water lacks. Among these methods, heterogeneous photocatalysis is more commonly widely used since it converts organic molecules into carbon dioxide and water. In this study, the photocatalytic degradation process of total organic carbon was investigated by TIO 2 /UV technique (TUT). This treatment is carried out in a batch recycle reactor using a UV light and catalyst TIO 2 . The optimum operating parameters were investigated regarding the best organic removal including, total organic carbon concentration, flow rate, pH, irradiation time, and photocatalysis dosage. The result showed that the TUT is affected by reducing total organic carbon (TOC) from synthetic wastewater (SW) by 61% at 50 ml/ min of flow rate, 250 mg of catalyst concentration TIO 2 , and a concentration of TOC of 25 mg/l. Then the result of TUT was compared with a process of combining TIO 2 /UV and an oxidizing agent (Hydrogen peroxide H 2 O 2 ). It was found that 73% of organic removal was obtained which is best than TUT when using an H 2 O 2 dosage of 100 mg/l. Experimentally, Ozone was also added to the process of TUT and the result showed that the removal percentage increased to 80%.

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Effects of 2-chlorophenol and 2,4,6-trichlorophenol on an activated sludge sequencing batch reactor

Cited by 6 publications

References 21 publications

Photocatalytic treatment of organic pollutants in a synthetic wastewater using UV light and combinations of TiO2, H2O2 and Fe(III)

Photocatalytic treatment of organic pollutants in a synthetic wastewater using UV light and combinations of TiO2, H2O2 and Fe(III)

The effect of caffeine, metronidazole, and ibuprofen on continuous flow activated sludge process

Removal of Organic Pollutants from Wastewater Using Different Oxidation Strategies

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