This study examined the effects of ozonation and UV applied in series (O3+UV) or simultaneously (UVO) under four different ozone dosages from 4 to 7 mg/min understand surface alterations on polyethylene microplastics aquatic environments via photochemical oxidation process. The plastic samples were analyzed by Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS...

Globally, sustainable water management is required to minimize security, and soil aquifer treatments (SATs) are widely applied in wastewater reclamation. Clogging problems limit the operation of SATs (i.e., decrease infiltration rate), Physical clogging has been studied. However, effect biological on still unclear. Thus, this study focuses effects an SAT system demonstrates that process column....

Biological nitrogen and phosphorus removal was investigated in an intermittently aerated sequencing batch reactor (IASBR) and a sequencing batch reactor (SBR). The removal efficiencies of ammonium-nitrogen (NH4(+)-N) were 100% in both reactors in steady operation state. The total nitrogen (TN) removal efficiencies were 90.4% in the IASBR and 79.3% in the SBR, while the total phosphorus (TP) rem...

This study has focused on the evaluation of biotoxicity controlling effects during TBBPA degradation by ozonation, including acute, chronic and genetic toxicity under different [O3]/[TBBPA] (1:1–11:1), initial solution pH (5.0–9.0) temperatures (10–40 °C). In addition, comprehensive treated water sample was evaluated method potential ecotoxic probe (PEEP). The results showed that could be compl...

Alginate like extracellular polymers (ALE) recovered from excess sludge have been evaluated as an eco-friendly, cost effective and sustainable alternative to highly valued materials. However, the ALE extraction flocculent ranges normally 90 190 mg/g VSS, which is only equivalent lowest edge of production aerobic granular (AGS). But much higher in than AGS thus a further investigation was expect...

Ozone is known to be effective for achieving positive treatment effects on sludge characteristics. One of these effects is the reduction in excess sludge generation in wastewater treatment operations. This application is known for many years and full scale plants are installed and in operation. The economical success of this application strongly depends on the required ozone dose to reduce a ce...

In this study, hydrogen production from starch wastewater using anaerobic sludge immobilized on maghemite nanoparticles (γ-Fe2O3) was investigated. Two anaerobic baffled reactors (ABR-1 and ABR-2) were operated at organic loading rate (OLR) of 3.63±0.43 g-COD/L.d and hydraulic retention time (HRT) of 10 h. The ABR-1 was inoculated with 3.5 g-VSS/L preheated sludge at 90°C for 30 minutes. The se...

Effects of external carbon sources and COD/NO(3)-N on nitrite accumulation through denitrification were studied at a temperature of 28±2.0 °C using mixed activated sludge. Nitrite accumulation was observed for each type of carbon source studied. Glucose resulted in the greatest nitrite accumulation and production rate, which were 14.51±2.41 mg/L and 0.121±0.013 g N/(g VSS d), respectively. More...

The simultaneous removal of formaldehyde and ammonium in aerobic cultures and the inhibitory effect of formaldehyde on ammonium oxidation were investigated. The influence of a co-substrate, methanol, on formaldehyde biodegradation and on the nitrification process was also evaluated. Formaldehyde was completely removed at all concentrations tested (30–3890 mg dm−3) in assays with that compound a...