A novel method to enhance polychlorinated dibenzo-p-dioxins and dibenzofurans removal by adding bio-solution in EAF dust treatment plant

2008 ◽  
Vol 150 (1) ◽  
pp. 83-91 ◽  
Author(s):  
Hsing-Wang Li ◽  
Wen-Jhy Lee ◽  
Perng-Jy Tsai ◽  
Jin-Luh Mou ◽  
Guo-Ping Chang-Chien ◽  
...  
Keyword(s):  
Treatment Plant ◽  
Eaf Dust ◽  
Novel Method ◽  
Dust Treatment

scholarly journals Quantitative Indicators of Social Sustainability and Determination of Their Interdependencies. Example Analysis for a Wastewater Treatment Plant

2017 ◽  
Vol 62 (2) ◽  
pp. 224 ◽  
Author(s):  
Tamara Popovic ◽  
Andrzej Kraslawski
Keyword(s):  
Wastewater Treatment ◽  
Social Impact ◽  
Treatment Plant ◽  
Social Sustainability ◽  
Bipartite Network ◽  
Weighting Method ◽  
Treatment Processes ◽  
The Social ◽  
Novel Method ◽  
Quantitative Indicators

Social impact as growing concern is becoming an important aspect of the design and operation of wastewater treatment processes. A need has arisen for the development of quantitative indicators of social sustainability. Design and operation of wastewater treatment processes additionally require simple and effective methods to represent and understand the interconnections between the indicators of social sustainability. This paper presents an approach for the development of quantitative social sustainability indicators, and introduces a novel method for defining and visualizing indicator interdependence. It outlines equations for quantitative evaluation of health, safety and security, and comfort. Weighting method of the bipartite network of the relations between the indicators and stakeholders enables clear visualization of the interdependencies of the indicators and facilitates simplification of the set of social sustainability criteria. It creates a basis for reduction of amount of data needed for performing the analysis and reducing the social sustainability assessment’s costs.

scholarly journals Novel Method for Rapid Assessment of Antibiotic Resistance in Escherichia coli Isolates from Environmental Waters by Use of a Modified Chromogenic Agar

2007 ◽  
Vol 73 (7) ◽  
pp. 2224-2229 ◽  
Author(s):  
A. J. Watkinson ◽  
G. R. Micalizzi ◽  
J. R. Bates ◽  
S. D. Costanzo
Keyword(s):  
Escherichia Coli ◽  
Antibiotic Resistance ◽  
Environmental Samples ◽  
Rapid Assessment ◽  
Treatment Plant ◽  
Wastewater Effluent ◽  
Susceptibility Test ◽  
E Coli ◽  
Novel Method ◽  
Disk Susceptibility

ABSTRACT We validated a novel method for screening Escherichia coli resistance to antibiotics in environmental samples using modified Difco MI agar (Becton Dickinson) impregnated with selected antibiotics (tetracycline, ampicillin, cephalexin, and sulfamethoxazole), termed MI-R. This method combines an existing rapid assessment technique for E. coli enumeration with clinical reference data for breakpoint analysis of antibiotic resistance and was developed to address issues encountered when clinical methods are used with environmental samples. Initial trials conducted using strains of E. coli with resistance to the selected antibiotics showed that this method was reproducible and accurate with respect to antibiotic resistance. Trials using wastewater effluent demonstrated the precision of the method, and the levels of resistance found in effluent were directly comparable to the levels of antibiotic resistance determined using the more traditional CLSI (formerly NCCLS) disk susceptibility test. All wastewater isolates growing on MI-R plates were confirmed to be resistant using the CLSI disk susceptibility test. Bacterial resistance to ampicillin (38% ± 4% overall), sulfamethoxazole, tetracycline (21% ± 3% overall), and ciprofloxacin (6% ± 1%) were found in wastewater effluent. A successful trial was also conducted with water collected from the Brisbane River, Australia. The levels of antibiotic resistance in E. coli ranged from 0 to 47% for ampicillin, from 0 to 24% for tetracycline, from 0 to 63% for sulfamethoxazole, and from 0 to 1% for ciprofloxacin, with the highest incidence of resistance associated with wastewater treatment plant discharges. This method has great potential for rapid and representative assessment of antibiotic resistance in E. coli and could allow increased sample analysis, resulting in greater confidence in spatial analysis in environmental studies.

Combining lab results and full-scale plant experience for the optimisation of dead-end ultrafiltration - an integrated approach

2003 ◽  
Vol 3 (5-6) ◽  
pp. 373-378
Author(s):  
A. Brügger ◽  
T. Melin
Keyword(s):  
Stress Measurement ◽  
Operation Mode ◽  
Treatment Plant ◽  
Operating Experience ◽  
Integrated Approach ◽  
Full Scale ◽  
Dead End ◽  
Key Issues ◽  
Novel Method ◽  
Wastewater Treatment Plant Effluent

During the last four years a new cushion module has been commercialised for dead-end ultrafiltration in water treatment. However, system and operation mode optimisation is still subject to research and development activities. For dead-end ultrafiltration one of the key issues is the module flushing procedure. So far, analytical methods for the investigation of particular steps during module flushing are rare and optimisation in most cases relies on operating experience. This paper presents the optimisation of the airpulsing step as part of the module flushing procedure with an approach, which combines lab-scale experiments and analysis of full-scale plant operation. For this purpose a novel method for shear stress measurement has been developed and applied. The results have been utilised for the optimisation of a fullscale ultrafiltration unit for wastewater treatment plant effluent upgrade. After changing the module flushing parameters and thus enhancing the flushing efficiency it was possible to increase filtration performance.

Measurement of polychlorinated dibenzo-p-dioxin and dibenzofuran emission from EAF steel making proces

2012 ◽  
Vol 57 (3) ◽  
pp. 811-821 ◽  
Author(s):  
T. Sofilic ◽  
J. Jendričko ◽  
Z. Kovačevic ◽  
M. Ćosić
Keyword(s):  
Treatment Plant ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Drop Out ◽  
Steel Scrap ◽  
Arc Furnace ◽  
Electric Arc Furnace Dust ◽  
Arc Furnaces ◽  
Polycyclic Aromatic ◽  
Dust Treatment

Electric arc furnace (EAF) steel manufacturing is an important recycling activity which contributes to the recovery of steel resources and steel scrap/waste minimization. Because of the content of plastics, coatings and paintings as well as other nonferrous materials in the charge during melting, a strong emission of pollutants, including polluting substance group consists of persistent organic pollutions (POPs) represented by polycyclic aromatic hydrocarbon (PAH), polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins (PCDDs), and polychlorinated dibenzofurans (PCDFs) occurs. This study was set out to investigate emissions of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDDs/Fs) from the stack of a new electric-arc furnace-dust treatment plant installed during modernisation of the Melt Shop in CMC SISAK d.o.o., Croatia. Obtained results have been compared with previously obtained results of PCDDs/Fs emission measurements from the old electric-arc furnace dust treatment without dust drop-out box, as well as quenching tower. The total PCDDs/Fs concentration in the stack off gases of both electric arc furnaces EAF A and EAF B were 0.2098 and 0.022603 ng I-TEQ/Nm3 respectively, and these results are close to previous obtained results by other authors. The calculated values of the emission factors for PCDDs/Fs calculated on the basis of measured PCDDs/Fs concentration in the stack off gases in 2008 and 2011 were 1.09 and 0.22 ng I-TEQ/ ton steel, respectively.

Novel method for sludge blanket measurements

2013 ◽  
Vol 69 (4) ◽  
pp. 775-782 ◽  
Author(s):  
J. Schewerda ◽  
G. Förster ◽  
J. Heinrichmeier
Keyword(s):  
Waste Water Treatment ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Differential Pressure ◽  
Waste Water Treatment Plant ◽  
Clear Water ◽  
Simple Method ◽  
Secondary Clarifier ◽  
Novel Method ◽  
Full Scale Tests

The most widely used methods for sludge blanket measurements are based on acoustic or optic principles. In operation, both methods are expensive and often maintenance-intensive. Therefore a novel, reliable and simple method for sludge blanket measurement is proposed. It is based on the differential pressure measurement in the sludge zone compared with the differential pressure in the clear water zone, so that it is possible to measure the upper and the lower sludge level in a tank. Full-scale tests of this method were done in the secondary clarifier at the waste water treatment plant in Hecklingen, Germany. The result shows a good approximation of the manually measured sludge level.

scholarly journals EAF Dust Treatment Practice at the Shisaka Works

2007 ◽  
Vol 123 (12) ◽  
pp. 726-729 ◽  
Author(s):  
Katsuhiko NAGAI ◽  
Yasuhiro MATSUMOTO ◽  
Hiroshi WATANABE
Keyword(s):  
Treatment Practice ◽  
Eaf Dust ◽  
Dust Treatment

scholarly journals Response of Japanese Privet to Plastic Mulch Applied over Nonspaced Containers

2018 ◽  
Vol 28 (1) ◽  
pp. 58-65
Author(s):  
Shawn T. Steed ◽  
Allison Bechtloff ◽  
Andrew Koeser ◽  
Tom Yeager
Keyword(s):  
Irrigation Water ◽  
Water Conservation ◽  
Treatment Plant ◽  
Weed Suppression ◽  
Production Costs ◽  
Plastic Mulch ◽  
Overhead Irrigation ◽  
Novel Method ◽  
Black Plastic ◽  
Over The Top

Mulches have many positive benefits for the production of plants, ranging from weed suppression to water conservation. In this study, a novel method of using plastic film mulch for container-grown plants was evaluated. Plots of 25 japanese privet (Ligustrum japonicum) in #1 (2.5 qt) nonspaced containers were wrapped with 1.25-mil white or black plastic mulch over the top and sides of containers. Small plants were planted through the plastic and grown for 22 weeks with overhead irrigation. Water application amount was determined by moisture sensors placed in the substrate of each treatment. Plant growth, dry weights (DWs), weed fresh weights, weeding time, substrate electrical conductivity (EC), substrate temperature, total water applied, and mulch costs were determined. Black plastic (BP) and white plastic (WP) mulch reduced water applied by 82% and 91%, respectively, compared with the nontreated control (NT). Nontreated control plants grew faster and had greater DW at the end of the experiment. Mulched containers had fewer weeds and required less labor to remove weeds than the NT treatment. Substrate EC level was greater in BP and WP treatments than for the NT after 20 weeks, and plastic mulch did not result in different substrate temperatures. Plastic mulch added $4.94/1000 containers ($2.24 input cost and $2.70 removal cost) to production costs, not including disposal costs. This novel method of mulching nonspaced plants reduced irrigation water, herbicide applications, and weeding labor, but probably added 2–3 weeks to finish time.

scholarly journals Basic Consideration on EAF Dust Treatment Using Hydrometallurgical Processes

2008 ◽  
Vol 55 (3) ◽  
pp. 144-148 ◽  
Author(s):  
T. NAKAMURA ◽  
E. SHIBATA ◽  
T. TAKASU ◽  
H. ITOU
Keyword(s):  
Eaf Dust ◽  
Dust Treatment
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