Advanced H2O2 oxidation for diethyl phthalate degradation in treated effluents: effect of nitrate on oxidation and a pilot-scale AOP operation

One of the objectives of this study was to delineate the effect of nitrate on diethyl phthalate (DEP) oxidation by conducting a bench-scale ultraviolet (UV)/H2O2 and O3/H2O2 operations as suggested in a previous study. We also aim to investigate DEP oxidation at various UV doses and H2O2 concentrations by performing a pilot-scale advanced oxidation processes (AOP) system, into which a portion of the effluent from a pilot-scale membrane bioreactor (MBR) plant was pumped. In the bench-scale AOP operation, the O3 oxidation alone as well as the UV irradiation without H2O2 addition could be among the desirable alternatives for the efficient removal of DEP dissolved in aqueous solutions at a low DEP concentration range of 85±15 μg/L. The adverse effect in the UV/H2O2 process was significantly greater than that in the UV oxidation alone, and its oxidation was almost halved by the nitrate. However, the nitrate clearly enhanced the DEP oxidation in the O3 oxidation and O3/H2O2 process. Especially, the addition of nitrate almost doubled the DEP oxidation efficiency in the O3/H2O2 process. The series of pilot-scale AOP operations confirmed that about 30–50% of DEP dissolved in the treated MBR effluent streams was, at least, oxidized by the O3 oxidation alone as well as the UV irradiation without H2O2 addition. The UV photolysis of H2O2 was most effective for DEP degradation with an H2O2 concentration of 40 mg/L at a UV dose of 500 mJ/cm2.

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Degradation of diethyl phthalate in treated effluents from an MBR via advanced oxidation processes: Effects of nitrate on oxidation and a pilot‐scale AOP operation

Environmental Technology ◽

10.1080/09593330903289697 ◽

2010 ◽

Vol 31 (1) ◽

pp. 15-27 ◽

Cited By ~ 8

Author(s):

J.H. Park ◽

C.G. Park ◽

J.W. Lee ◽

K.B. Ko

Keyword(s):

Advanced Oxidation Processes ◽

Advanced Oxidation ◽

Pilot Scale ◽

Diethyl Phthalate ◽

Oxidation Processes ◽

Treated Effluents

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A comparative study on ozone, hydrogen peroxide and UV based advanced oxidation processes for efficient removal of diethyl phthalate in water

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2018.10.003 ◽

2019 ◽

Vol 363 ◽

pp. 401-411 ◽

Cited By ~ 26

Author(s):

Lobna Mansouri ◽

Chedly Tizaoui ◽

Sven-Uwe Geissen ◽

Latifa Bousselmi

Keyword(s):

Hydrogen Peroxide ◽

Comparative Study ◽

Advanced Oxidation Processes ◽

Advanced Oxidation ◽

Diethyl Phthalate ◽

Efficient Removal ◽

Oxidation Processes

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Aqueous ammonia soaking (AAS) as a biomass pretreatment method: pilot-scale study with switchgrass, bench-scale use with poplar, and methane potential from anaerobic digestion of pretreated switchgrass

10.31274/etd-180810-2802 ◽

2009 ◽

Author(s):

Jennifer Nicole Himmelsbach

Keyword(s):

Anaerobic Digestion ◽

Aqueous Ammonia ◽

Pilot Scale ◽

Biomass Pretreatment ◽

Pretreatment Method ◽

Bench Scale ◽

Aqueous Ammonia Soaking ◽

Methane Potential

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Comparison of Various Advanced Oxidation Processes for the Degradation of Bisphenol A

Linnaeus Eco-Tech ◽

10.15626/eco-tech.2010.015 ◽

2017 ◽

pp. 147

Author(s):

Naser Jamshidi ◽

Farzad Nezhad Bahadori ◽

Ladan Talebiazar ◽

Ali Akbar Azimi

Keyword(s):

Bisphenol A ◽

Uv Irradiation ◽

Advanced Oxidation Processes ◽

Irradiation Time ◽

Advanced Oxidation ◽

Chemical Oxidation ◽

Photochemical Oxidation ◽

Input Concentration ◽

Oxidation Processes ◽

Ph Range

Today, advanced oxidation processes (AOPs) is considered as a key and effective method for environment preservation from pollutions. In this study , advanced photochemical oxidation processes using O3/H2O2 and O3/H2O2/UV systems were investigated batch photolytic reactor in lab-scale for the degradation of bisphenol A (BPA). In ozone generator source, air, as of the initial instrument feed, changes to ozone after electrical action and reaction. The UV irradiation source was a medium-pressure mercury lamp 300 W that was immerse in the wastewater solution with in 1.5 liter volume reactor. The reaction was influenced by the pH, the input concentration of H2O2, the input concentration of BPA, ozone dosage, chemical oxidation demand (COD) and UV irradiation time. Results showed that at initial bisphenol A concentration of 100 mg/l will completely degrade after 60 minutes by using O3/H2O2 in the pH range from 9.8 to 10 and by adding UV, it will happen in less than 36 minutes in the pH range of 3 to 10. The O3/H2O2/UV process reduced COD to 75 percents.

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A gastrulation center in the ascidian egg

Development ◽

10.1242/dev.116.supplement.53 ◽

1992 ◽

Vol 116 (Supplement) ◽

pp. 53-63 ◽

Cited By ~ 1

Author(s):

William R. Jeffery

Keyword(s):

Nervous System ◽

Uv Irradiation ◽

Second Phase ◽

Uv Sensitivity ◽

Maternal Mrna ◽

Free Translation ◽

Vegetal Pole ◽

Cell Embryo ◽

Ooplasmic Segregation ◽

Uv Dose

A gastrulation center is described in ascidian eggs. Extensive cytoplasmic rearrangements occur in ascidian eggs between fertilization and first cleavage. During ooplasmic segregation, a specific cytoskeletal domain (the myoplasm) is translocated first to the vegetal pole (VP) and then to the posterior region of the zygote. A few hours later, gastrulation is initiated by invagination of endoderm cells in the VP region of the 110-cell embryo. After the completion of gastrulation, the embryonic axis is formed, which includes induction of the nervous system, morphogenesis of the larval tail and differentiation of tail muscle cells. Microsurgical deletion or ultraviolet (UV) irradiation of the VP region during the first phase of myoplasmic segregation prevents gastrulation, nervous system induction and tail formation, without affecting muscle cell differentiation. Similar manipulations of unfertilized eggs or uncleaved zygotes after the second phase of segregation have no effect on development, suggesting that a gastrulation center is established by transient localization of myoplasm in the VP region. The function of the gastrulation center was investigated by comparing protein synthesis in normal and UV-irradiated embryos. About 5% of 433 labelled polypeptides detected in 2D gels were affected by UV irradiation. The most prominent protein is a 30 kDa cytoskeletal component (p30), whose synthesis is abolished by UV irradiation. p30 synthesis peaks during gastrulation, is affected by the same UV dose and has the same UV-sensitivity period as gastrulation. However, p30 is not a UV-sensitive target because it is absent during ooplasmic segregation, the UV-sensitivity period. Moreover, the UV target has the absorption maximum of a nucleic acid rather than a protein. Cell-free translation studies indicate that p30 is encoded by a maternal mRNA. UV irradiation inhibits the ability of this transcript to direct p30 synthesis, indicating that p30 mRNA is a UV-sensitive target The gastrulation center may function by sequestration or activation of maternal mRNAs encoding proteins that function during embryogenesis.

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Coagulation-Direct Filtration of Soft, Low Alkalinity Humic Waters

Water Science & Technology ◽

10.2166/wst.1999.0442 ◽

1999 ◽

Vol 40 (9) ◽

pp. 55-62 ◽

Cited By ~ 9

Author(s):

Bjørnar Eikebrokk

Keyword(s):

Natural Organic Matter ◽

Pilot Scale ◽

Quality Parameters ◽

Efficient Removal ◽

Direct Filtration ◽

Ph Values ◽

Optimum Ph ◽

Calcium Sources ◽

Ph Conditions ◽

Removal Efficiencies

Optimisation of coagulation-direct filtration processes with respect to efficient removal of humic substances, i.e. natural organic matter (NOM) has gained a lot of focus in many countries over the last years. This paper presents experimental results from pilot scale research studies aimed at optimising the coagulation-direct filtration process applied to soft and humic raw waters with low turbidity and alkalinity levels. Comprehensive tests of 3 types of raw waters with different NOM content, 5 types of coagulants, and 3 calcium sources for the purpose of corrosion control have been conducted. Removal efficiencies with respect to relevant water quality parameters are presented, with typical relationships between raw water NOM content, coagulant dose requirements and pH. Generally, when applying metal-based coagulants, residual metal concentration was the critical parameter regarding minimum coagulant dose requirements. Typical NOM removal efficiencies were in the range of 75-90% and 40-70% with respect to colour and organic carbon, respectively. Optimum pH conditions for the removal of NOM and/or residual metals do not always coincide with that of turbidity. The experiments also showed that poly-aluminium and ferric chlorides might have some benefits over alum in terms of dose requirements and range of optimum pH values, and that chitosan may be used for colour removal with good results.

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Influence of solution pH on degradation of atrazine during UV and UV/H2O2 oxidation: kinetics, mechanism, and degradation pathways

RSC Advances ◽

10.1039/c9ra05747a ◽

2019 ◽

Vol 9 (61) ◽

pp. 35847-35861 ◽

Cited By ~ 2

Author(s):

Yucan Liu ◽

Kai Zhu ◽

Miaomiao Su ◽

Huayu Zhu ◽

Jianbo Lu ◽

...

Keyword(s):

Uv Irradiation ◽

Oxidation Kinetics ◽

Irradiation Time ◽

Degradation Mechanism ◽

Degradation Pathways ◽

Solution Ph ◽

H2o2 Oxidation ◽

Ph Conditions

The kinetics, degradation mechanism and degradation pathways of atrazine (ATZ) during sole-UV and UV/H2O2 processes under various pH conditions were investigated; the effects of UV irradiation time and H2O2 dose were also evaluated.

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Rejection of organic micropollutants by high pressure membranes: comparison of bench-scale versus single element tests

Water Science & Technology Water Supply ◽

10.2166/ws.2006.909 ◽

2006 ◽

Vol 6 (4) ◽

pp. 107-116

Author(s):

T.U. Kim ◽

C. Bellona ◽

P. Xu ◽

J. Drewe ◽

G. Amy

Keyword(s):

High Pressure ◽

Scale Up ◽

Pilot Scale ◽

Membrane Properties ◽

Single Element ◽

Organic Micropollutants ◽

Trace Organic Compounds ◽

Operational Conditions ◽

Bench Scale ◽

Trace Organic

There has been considerable information reported on rejection of trace organic compounds from pilot-scale and full-scale experiments with reverse osmosis (RO) and nanofiltration (NF), but this information has limited value in predicting the rejection of these compounds by high-pressure membranes. The goal of this research is to define relationships between compound properties, membrane properties, and operational conditions, e.g. pressure, recovery, affecting trace organic compound rejection, comparing bench-scale recirculation tests and bench-scale single-pass tests. In addition, bench-scale results are compared against single element tests to ascertain scale-up effects.

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Closing the water loop in a maltery: reuse tests at pilot-scale

Water Science & Technology ◽

10.2166/wst.2006.883 ◽

2006 ◽

Vol 54 (10) ◽

pp. 9-15

Author(s):

H. De Wever ◽

W. Boënne ◽

M. Danau ◽

N. Vanderspiegel ◽

K. Hardy ◽

...

Keyword(s):

Water Quality ◽

Water Reuse ◽

Advanced Oxidation Processes ◽

Membrane Bioreactor ◽

Extracellular Polymeric Substances ◽

Pilot Scale ◽

Second Step ◽

Oxidation Processes ◽

Treatment Train ◽

Closed Water

This paper reports on the potential for water reuse in the malting sector. Core unit of a treatment train to close the water loop was a membrane bioreactor (MBR). We compared three different commercial submerged membranes for their fouling potential in this application and related this to the presence of extracellular polymeric substances (EPS). In a second step, we subjected MBR permeate to reverse osmosis and several (advanced) oxidation processes to evaluate the water quality achieved. Finally we performed a set of water reuse tests with waters obtained through different scenarios. The optimal scenario was then tested in a closed water loop over several malting cycles at pilot scale and the effect on water and malt quality was investigated.

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