Abstract:
:This study investigated the effect of various intermittent aeration (IA) cycles on organics and nutrient removal, and microbial communities in an integrated fixed-film activated sludge (IFAS) reactor treating municipal waste water. Average effluent biological oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids, total nitrogen (TN) and total phosphorus (TP) values were noted as 20, 50, 30, 12 and 1.5 mgL-1, respectively, in continuous aeration mode. A total of four operational conditions (run 1, continuous aeration; run 2, 150/30 min aeration on/off time; run 3, 120/60 min aeration on/off time and run 4, 90/60 min aeration on/off time) were investigated in IFAS reactor assessment. Among the all examined IA cycles, IA phase 2 gave the maximum COD and BOD removals with values recorded as 97% and 93.8%, respectively. With respect to nutrient removal (TN and TP), IA phase 1 was found to be optimum. Pathogen removal efficiency of present system was recorded as 90-95% during the three phases. With regard to settling characteristics, pilot showed poor settling during IA schedules, which was also evidenced by high sludge volume index values. Overall, IA could be used as a feasible way to improve the overall performance of IFAS system.
journal_name
Environ Technoljournal_title
Environmental technologyauthors
Singh NK,Bhatia A,Kazmi AAdoi
10.1080/09593330.2017.1281349subject
Has Abstractpub_date
2017-11-01 00:00:00pages
2866-2876issue
22eissn
0959-3330issn
1479-487Xjournal_volume
38pub_type
杂志文章abstract::To study lead (Pb) distribution in organs and blood in the case of Pb poisoning, mice were firstly exposed to Pb as 0.1 mL or 0.2 mL of lead nitrate solution (0.1 mg/mL) by vein injection every other day. Then, after metabolic absorption, the Pb level in the blood and organs of the mice was measured using flame atomic...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330903055643
更新日期:2009-09-01 00:00:00
abstract::This study investigated the biosorption kinetics and equilibrium of cadmium, nickel and zinc by activated sludge from a biological nutrient removal (BNR) process. A series of batch experiments with different initial metal concentrations were conducted to determine the metal removal in BNR sludge. The harvested sludges...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332808618806
更新日期:2007-04-01 00:00:00
abstract::In this work, the removal of arsenite, As(III), and arsenate, As(V), from aqueous solutions onto thermally processed dolomite (charred dolomite) via microcolumn was evaluated. The effects of mass of adsorbent (0.5-2 g), initial arsenic concentration (50-2000 ppb) and particle size (<0.355-2 mm) on the adsorption capac...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2014.929181
更新日期:2014-11-01 00:00:00
abstract::A soil-column system was tested for the removal of soluble organics and nutrients from partially treated liquid swine manure. The liquid manure was applied to the 900 mm deep (300 mm of local topsoil and 600 mm of local subsoil) soil columns continuously for an eight-week period, and leachate as well as soil samples w...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332808618761
更新日期:2007-01-01 00:00:00
abstract::Research was undertaken to investigate the treatment of fishery washing water using Bacillus sphaericus, and to recover the spores for subsequent use as bioinsecticide to control the population of mosquitoes. This treatment method could reduce pollution due to organic matter by decreasing the value of Chemical Oxygen ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332208618242
更新日期:2001-06-01 00:00:00
abstract::Treatment of wastewater containing phenol using laboratory scale waste stabilisation ponds enriched with activated sludge was studied. After enrichment, the efficiency of these ponds under high phenol loading rates (i.e. up to 408 kg phenol ha(-1) day(-1)) was studied. At phenol loading rates of 6, 52, 312, 636 and 97...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330309385581
更新日期:2003-04-01 00:00:00
abstract::Nitrous oxide (N2O), as one of the six greenhouse gases, is mainly produced in the biological nitrogen removal process of wastewater treatment plants (WWTPs). Establishing the N2O kinetic model can provide insight into the N2O generation mechanism and regulate its production. This work uses Activated Sludge Model NO.3...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2020.1822447
更新日期:2020-09-24 00:00:00
abstract::Normalizations by TSS or P-PO43- initial concentrations are consistent as they are correlated to the Jar-test performances. Jar-tests results are independent of the wastewater quality variations in terms of TSS and P-PO43- and independent of the WWTP origin of the water. A notable variability in the TSS results indica...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2020.1771433
更新日期:2020-06-01 00:00:00
abstract::Two different organophilic bentonites obtained by cationic exchange with benzyldimethyloctadecylammonium chloride and trimethyloctadecylammonium chloride have been used to adsorb the organic fraction of a tannery sludge. The exchange process was carried out to different extents to obtain bentonite samples with differe...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332208618309
更新日期:2001-01-01 00:00:00
abstract::The impact of carbon source variation on the physical and chemical characteristics of aerobic granular sludge and its biological nutrient (nitrogen and phosphorus) removal performance was investigated. Two identical sequencing batch reactors, R1 and R2, were set up. Granular biomass was cultivated to maturity using ac...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2015.1023364
更新日期:2015-01-01 00:00:00
abstract::The separate treatment of sludge liquor, produced by dewatering anaerobic digested sludge at wastewater treatment plants, gives rise to extreme environments for nitrogen removal. A full-scale sequencing batch reactor was operated with the aim of introducing and studying denitritation as a supplement to nitritation in ...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2010.515618
更新日期:2011-05-01 00:00:00
abstract::The measurement of sludge bioavailability and biodegradability is important to assess the sludge potential as a source of carbon and energy during its biological stabilization. As the majority of biological sludge (secondary sludge) consists of biomass, an increase in sludge bioavailability can be achieved by using di...
journal_title:Environmental technology
pub_type: 杂志文章,评审
doi:10.1080/09593330802015508
更新日期:2008-08-01 00:00:00
abstract::The research on the Columbia River Basalt is a unique combination of projects that minimise CO2 emissions to the atmosphere. Both are underground waste disposal projects: CO2 waste versus nuclear waste. The recent Wallula CO2 project and the previous nuclear-waste project in the Columbia River Basalt (CRB), USA, provi...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2020.1815859
更新日期:2020-09-09 00:00:00
abstract::A pilot-scale study of tertiary wastewater treatment of the JIZHUANGZI Municipal Wastewater Treatment Plant was carried out by preozonation, coagulation and direct filtration process with the aim of producing wastewater suitable for reuse. The proposed treatment scheme could produce a filtered water with lower turbidi...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332208618287
更新日期:2001-03-01 00:00:00
abstract::UV-light irradiated photocatalytic reduction of Cr(VI) to Cr(III) in aqueous solution using ZnFe2O4 nanoparticles in the presence of formic acid was reported. X-ray diffraction (XRD), scanning electron microscope (SEM), energy dispersive X-ray spectroscopy (EDS) and UV-Vis diffuse reflectance spectroscopy (DRS) were e...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2020.1713902
更新日期:2020-01-21 00:00:00
abstract::This manuscript describes the characterization of as-synthesized titanate nanotube (TNT) and its sorption behaviours on cadmium with the interactions of inorganic anions. The X-ray diffraction and transmission electron microscopy found that the nanotube is in sodium titanate crystal phase (Na2Ti3O7) and the pores of T...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2013.798035
更新日期:2013-11-01 00:00:00
abstract::The effect of ethylenediaminetetraacetic acid (EDTA) during electrokinetic decontamination (EKD) was investigated in this research. EDTA is a ligand that can form soluble complexes with precipitated heavy metals inside soil pores. Millpond sludge, primarily contaminated with lead (Pb) and zinc (Zn), was subjected to E...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2012.665493
更新日期:2012-10-01 00:00:00
abstract::A dynamic method and a static gravimetric method are respectively used to measure the adsorption equilibria of m-xylene and n-butyl acetate on Wessalith DAY zeolite F20. The equilibrium experiments are performed at different temperatures for both volatile organic compounds (VOCs). The m-xylene isotherms obtained in th...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330309385662
更新日期:2003-10-01 00:00:00
abstract::Standard experimental protocols for biodegrading petroleum hydrocarbons employ microbiological and/or analytical analysis, and require advanced machines and specialized professionals to carry them out. Furthermore, the obtained results involve a high margin of error. In this paper, a new experimental technique was dev...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593332708618727
更新日期:2006-10-01 00:00:00
abstract::A highly sensitive and selective optical chemosensor (Arg-Rhoen) for determination of Au3+ was prepared by covalent immobilization of rhodamine ethylenediamine on agarose gel. Spectrophotometric studies of complex formation, chemical structures and purity of the hydrogel sensor were carried out using TGA, NMR, TEM, an...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2020.1850873
更新日期:2020-12-07 00:00:00
abstract::Maghemite/silica nanocomposite microspheres (γ-Fe2O3/SiO2 MS) have been tested as magnetically separable heterogeneous Fenton catalyst in beidellite clay slurries in the presence of methylorange (MO) as a model pollutant. Due to its strong magnetic susceptibility, the catalyst was easily recovered from the clay slurri...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2019.1620865
更新日期:2021-01-01 00:00:00
abstract::The use of garbage grinders is not a usual practice in Europe, but it is in other countries around the world (e.g., North America, Japan and Australia). Sometimes, garbage grinders are accused of producing problems in sewers and wastewater treatment plants and are prohibited by environmental protection laws. In this s...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330309385567
更新日期:2003-03-01 00:00:00
abstract::The present study investigated the effects of arsenate and phosphate interaction on growth, lipid peroxidation, arsenic (As) accumulation, phosphorus (P) accumulation, and the activities of some antioxidant enzymes in Isatis cappadocica. Plants were exposed to (50-1200 μmol L-1) arsenate and (5-1600 μmol L-1) phosphat...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2017.1329349
更新日期:2018-05-01 00:00:00
abstract::Treatment of sewage sludge (SS) by biodegradable polyacrylamide-based flocculants (PAM) is considered to be an effective way to increase total solids' (TS) content prior to anaerobic digestion (AD). However, data on how PAM addition influences the efficiency of AD process are quite contradictory; moreover, no data are...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2017.1417492
更新日期:2019-04-01 00:00:00
abstract::Maturation ponds are excellent natural treatment systems for disinfecting domestic wastewater from pathogenic bacteria because of their great sunlight exposure through depth and high pH and dissolved oxygen values - all considered important factors. Escherichia coli (E. coli) removal is higher at closer to the surface...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2017.1310936
更新日期:2018-03-01 00:00:00
abstract::In this paper, a novel adsorbent which used polyvinyl alcohol, alginate and biochar was successfully made and been used to remove lead from aqueous solutions. Batch experiments were carried out to evaluate the adsorption capacities of Pb (II) on this bead. Experimental data were analysed by the model equations like La...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2019.1642388
更新日期:2019-07-17 00:00:00
abstract::Liquid-state bioconversion (LSB) technique has great potential for application in bioremediation of sewage sludge. The purpose of this study is to determine the optimum level of LSB process of sewage sludge treatment by mixed fungal (Aspergillus niger and Penicillium corylophilum) inoculation in a pilot-scale bioreact...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2015.1058860
更新日期:2016-01-01 00:00:00
abstract::A series of bench-scale nitrification/denitrification tests were carried out with both suspended growth and hybrid bioreactors. The hybrid reactor was filled with plastic (polyethylene) media to evaluate the effects of biofilm. Two types of reactor configurations were tested; 4-compartment and 6-compartment modes. The...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330309385533
更新日期:2003-01-01 00:00:00
abstract::In this study, Fe(VI) was applied to treat three mine tailings containing different amounts of sulphides and heavy metals. Oxidation of sulphides by Fe(VI) was studied at pH 9.2 with variation of solid to solution ratio, Fe(VI) concentration and injection number of Fe(VI) solution. The major dissolved products from th...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330.2014.943300
更新日期:2015-01-01 00:00:00
abstract::Total solids (TS) concentrations ranging from 15 to 66 g L(-1) of starch industry wastewater (SIW) were tested as raw material for the production of Bacillus thuringiensis var. kurstaki HD-1 (Btk) biopesticide in shake flasks and a 15 L bench-scale fermenter. Shake flask studies revealed a higher delta-endotoxin conce...
journal_title:Environmental technology
pub_type: 杂志文章
doi:10.1080/09593330902753495
更新日期:2009-04-01 00:00:00