Abstract:
:Separation of nanoscale oil droplets in the cutting-oil emulsion by electrocoagulation-flotation (ECF) was carried out in a bubble column reactor (BCR) and an external-loop airlift reactor (ALR). Under the batch operation, aluminium electrode provided the highest efficiency of 99% and required the shortest separating time compared to iron and graphite electrodes. The separation performance was also affected by the electrode gap and current density due to the amount of produced aluminium ions and turbulence by bubble motions. Additionally, the ECF efficiency obtained from the ALR was similar to that of the BCR. However, the ALR was preferable owing to its lower energy consumption, less electrode sacrifice, and less sludge production. Similar results were acquired under the continuous mode; nevertheless, the highest efficiency of only 85% was achieved from both reactors. It was found that the efficiency declined with increasing flow rates. According to the results suggested by the residence time distribution (RTD), the ALR was more effective at higher flow rates since the plug flow condition can be retained. On the other hand, an increase in flow rate also provoked the bypass flow to the down-comer of the ALR, resulting in the presence of a dead zone and reduction in the treatment efficiency.
journal_name
Environ Technoljournal_title
Environmental technologyauthors
Chawaloesphonsiya N,Prommajun C,Wongwailikhit K,Painmanakul Pdoi
10.1080/09593330.2016.1226956subject
Has Abstractpub_date
2017-05-01 00:00:00pages
1295-1304issue
10eissn
0959-3330issn
1479-487Xjournal_volume
38pub_type
杂志文章abstract::The adsorption-desorption of copper ions and a mixture of five metal ions (cadmium, copper, nickel, lead and zinc) in aqueous solutions by a spruce sawdust column was reported. Different studies about the copper binding mechanism, the efficiency of some regenerating solutions for the copper desorption, the use of colu...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330309385584
更新日期:2003-04-01 00:00:00
abstract::This study describes a method to formulate struvite fine powder into pellets that are easy to spread on agricultural land. To evaluate the quality of produced pellets, some chemical and physical properties commonly measured for fertilizers were tested. The findings indicated that the salt index and heavy metal content...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2012.676073
更新日期:2012-12-01 00:00:00
abstract::To understand the effect of forests and wetlands on air quality, the PM10 and PM2.5 concentration and meteorological data were collected in the forest and wetland in the Beijing Olympic Forest Park in China from May 2106 to May 2017. The blocking rates of forest and wetland to PMs were calculated under different air q...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2018.1561759
更新日期:2020-07-01 00:00:00
abstract::Metal sulphide tailings present a potential risk for the environment because of their natural oxidability which leads to the production of acid mine drainage. The prospected site close to Marrakech includes zinc, lead and copper sulphide deposits. This site is located in an agricultural area near the Tensift River whi...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332808618861
更新日期:2007-09-01 00:00:00
abstract::The effects of two seed sludge types, namely conventional activated sludge (CAS) and membrane bioreactor sludge (MBS), on aerobic granulation were investigated. The treatment performances of the reactors were monitored during and after the granulation. Operational period of 37 days was described in three phases; Phase...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2014.925513
更新日期:2014-11-01 00:00:00
abstract::This study investigates the changes in biodegradability, rheology and metal concentration of wastewater sludge--non-hydrolyzed (raw), sterilized, and hydrolyzed (thermal alkaline pre-treatment) at total solids concentration from 10-50 g l(-1) to ascertain the bioavailability of nutrients for subsequent fermentation. T...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332808618788
更新日期:2007-03-01 00:00:00
abstract::This study explored the feasibility of progressive freeze concentration in boron removal and its concentration in aqueous solution. The influence of three key parameters in progressive freeze concentration on boron removal and concentration, namely, the advance speed of the ice front, the circumferential velocity of t...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2016.1255663
更新日期:2017-09-01 00:00:00
abstract::Chlorine dioxide is one of the most widely employed chemicals in the disinfection process of a drinking water treatment plant (DWTP). The aim of this work was to evaluate the influence of the adsorption process with granular activated carbon (GAC) on the chlorine dioxide consumption in final oxidation/disinfection. A ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2014.994043
更新日期:2015-05-01 00:00:00
abstract::The demand for uniformly sized and shaped produce that are aesthetically pleasing results in significant food waste throughout the world. Cucumber waste is a major agricultural waste product in a number of countries, especially areas with high pickle production. Opportunity exists for wastewater treatment plants conta...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2019.1601262
更新日期:2020-10-01 00:00:00
abstract::Ozonation of 2,4-dichlorophenol (DCP) in the presence of permanganate has been investigated at various levels of pH. Compared with only 40% in single ozonation, by catalytic ozonation the total organic carbon removal efficiency reached almost 95%. It has been shown that the addition of 0.5 mg L(-1) MnO4- (based on man...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593331003713677
更新日期:2010-10-01 00:00:00
abstract::Based on Cu-BTC metal-organic framework, thiol-functionalized and amino functionalized materials were prepared by the modified Stöber method. Then, the Cu3(BTC)2 and the functionalized materials were characterized by means of X-ray diffraction, SEM-EDS and FT-IR analysis. The adsorption properties of two materials for...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2019.1683618
更新日期:2019-10-29 00:00:00
abstract::The study aims to remove methylene blue dye from water with a fixed-bed column packed with Cu2O nanocomposite ceramsites. The column showed the advantages of fixed-bed column adsorption and photocatalytic oxidation. The Cu2O nanocomposite ceramsites with strong photocatalytic oxidation activity and well-developed poro...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2020.1743368
更新日期:2020-03-24 00:00:00
abstract::In this study, we investigated the application of sludge waste obtained from a coal mine drainage treatment facility that treats acid mine drainage (designated as AMD) from metal-mine water. The coal mine drainage sludge (designated as CMDS), which contained 70% goethite and 30% calcite, was utilized as a sorption mat...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330903573215
更新日期:2010-10-01 00:00:00
abstract::The photocatalytic degradation of an antibiotic, vancomycin B hydrochloride (VAN-B), has been investigated in aqueous suspensions of titanium dioxide (TiO2) by monitoring the change in its concentration as well as the production of ammonia and chlorides as a function of irradiation time. The removal of 50mg L(-1) VAN-...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2013.865085
更新日期:2014-05-01 00:00:00
abstract::A three phase (aqueous/solid/gas) mixed weak acid/base kinetic model developed by Musvoto et al. is applied to simulate the physical and chemical processes that occur on aeration of anaerobic digester liquors. Included in the model are the kinetic reactions for (i) weak acid/base dissocations (water, carbonate, ammoni...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332208618189
更新日期:2001-11-01 00:00:00
abstract::In this work, it was developed three-dimensional (3D) porous hydrogel sponges produced by the freeze-dried process using chitosan polymer functionalized by 11-mercaptoundecanoic acid (MUA). These chitosan-based sponges were used as cationic adsorbents for the removal of anionic methyl orange (MO) dye, simulating a mod...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2019.1689302
更新日期:2019-11-19 00:00:00
abstract::Bisphenol A (BPA) is a kind of a controversial endocrine disruptor, and is ubiquitous in environment. The degradation of BPA with the heterogeneous photo-Fenton system was demonstrated in this study. The Fe-Y molecular sieve catalyst was prepared with the ion exchange method, and it was characterized by X-ray radiatio...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2013.857699
更新日期:2014-03-01 00:00:00
abstract::Untreated wastewater from the dye industry and dyehouses cannot be directly discharged into the environment due to the high content of organic matter and intensive colouration, even with low concentrations of dye. In this paper, the application of a high voltage pulsed electrical discharge in the aqueous phase has bee...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2004.9619370
更新日期:2004-07-01 00:00:00
abstract::This work focused on studying the effect of the chemical oxidation demand to sulfide ratio (COD/S) on power generation and sulfide oxidation in microbial fuel cells treating sulfide-rich wastewater containing organic contaminants. The maximum power density achieved was 20 +/- 1 W m(-3) V(Anode) and the C(oulombic) yie...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2012.692715
更新日期:2013-01-01 00:00:00
abstract::The speciation of mercury in tropical coastal areas, although scarcely studied, has presented an odd behaviour when compared with the results obtained in temperate environments. In this work, we measured the concentrations of mercury species (mercuric mercury, methyl-mercury and dimethyl-mercury) in the sediments of S...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332308618357
更新日期:2002-08-01 00:00:00
abstract::Moringa oleifera extract is a high-capacity flocculant agent for turbidity removal in surface water treatment. A complete study of a pilot-plant installation has been carried out. Because of flocculent sedimentability of treated water, a residual turbidity occured in the pilot plant (around 30 NTU), which could not be...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330902831176
更新日期:2009-05-01 00:00:00
abstract::A hybrid liquid membrane process was used to remove cadmium cation from a solution using bis-(2-ethylhexyl) phosphoric acid as the carrier for the first time. Different polyethersulphone supporting membranes were prepared by a phase inversion technique. The prepared membrane could be efficiently used as the supporting...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2014.977826
更新日期:2015-01-01 00:00:00
abstract::This study presents the operation of a biotrickling filter when treating a monochlorobenzene (MCB) contaminated gaseous emission. Treatment dynamics were characterised by exposing the reactor to various MCB Organic Loads (OL). The use of different growth support materials, namely limestone, sand, ceramic and PVC pall-...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330309385699
更新日期:2003-12-01 00:00:00
abstract::This paper describes an application of aerobic respirometry to investigate the influence of humic matter (humate) on biological processes in dilution water and in municipal sewage. Standard product PolySeed, a consortium of bacteria considered to be representative of those found in an activated sludge, was used as a s...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330801984860
更新日期:2008-06-01 00:00:00
abstract::A pilot-scale biotrickling filter (BTF) packed with polyurethane (PU) foam was installed at one pharmaceutical factory in Zhejiang Province to study the removal of high-concentration H2S from water treatment plant. Experiments were performed at different empty bed residence times (EBRTs), H2S input load, ratio of liqu...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332708618687
更新日期:2006-07-01 00:00:00
abstract::Canada's agricultural emissions accounted for 60 Mt or 8% of national greenhouse gas (GHG) emissions in 2007. The estimation of CH4 emission factor (B0) from manure management systems in Canada is prone to uncertainty owing to lack of B0 values for Canadian conditions. Therefore, in this study, manure samples from six...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593331003743096
更新日期:2010-11-01 00:00:00
abstract::The production of extracellular protease by different Bacillus licheniformis strains (ATCC 21415, ATCC 21417 and ATCC 21424) was tested in wastewater sludge as a raw material as well as in synthetic soy medium to compare the capacity of protease production by different strains and to compare the capacity of the medium...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330903338429
更新日期:2010-01-01 00:00:00
abstract::The effects of ozonation on sludge disintegration should be investigated before the application of ozone during biological treatment, in order to minimize excess sludge production. In this study, changes in sludge and supernatant after ozonation of return activated sludge were investigated for seven different ozone do...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2011.650220
更新日期:2012-09-01 00:00:00
abstract::This paper presents the effects of treatments with cement and lime on the consistency limits of marine sediments dredged from Dunkirk port. The Casagrande percussion test and the fall cone test were used to determine the liquid limits of raw sediments and treated marine sediments. For the evaluation of the plastic lim...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2011.633565
更新日期:2012-06-01 00:00:00
abstract::This paper examines the chemical constituents of extracellular polymeric substances (EPS) and physicochemical properties of eight different sludge flocs from seven full-scale wastewater treatment plants. The physicochemical properties included floc properties (floc size, turbidity and effluent suspended solids (ESS) c...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2011.601763
更新日期:2012-04-01 00:00:00