Study on industrial macropollutants discharges in Milan sewer system

2016 ◽  
Vol 27 (2) ◽  
pp. 194-209 ◽  
Author(s):  
Shervin Shahvi ◽  
Enrico Orsi ◽  
Roberto Canziani ◽  
Enrico Larcan ◽  
Gianfranco Becciu
Keyword(s):  
Heavy Metals ◽  
Treatment Plant ◽  
Soil Surface ◽  
Environmental Benefits ◽  
Ministry Of Education ◽  
Quality Model ◽  
Content Type ◽  
Sampling Campaign ◽  
Lower Treatment ◽  
Accidental Discharge

Purpose – The purpose of this paper is to study the transformation of some macropollutants including hydrocarbons, surfactants and metals in Milan west sewer basin. The study is part of a wider research (named SWARMNET and proposed by Politecnico di Milano and Metropolitana Milanese S.p.A and has been classified as fundable by the Ministry of Education, University and Research of Italy), aiming at installing a monitoring system for measurement of accidental discharge of pollutants from industrial activities and real-time protection of the wastewater treatment plant (WWTP) by avoiding dangerous discharges entering the sewers. Good effluent and waste sludge quality allow safe agricultural reuse of both streams. Other objectives include food safety, lower treatment costs and reduction of pollution of soil, surface and groundwater. Design/methodology/approach – The west basin of Milan sewer network, discharging to San Rocco WWTP was considered. Among 700 industries, 16 have been selected for their specific characteristics and/or high industrial pollution load. A quality model was coupled with a hydraulic model to evaluate the effect of pollutants transport in the network. Findings – Heavy metals, surfactants and hydrocarbons have different behavior from biodegradable domestic sewage and can be modeled as conservative matter conveyed by advection only. Results show that the concentration values of these macropollutants at the inlet of the WWTP are below the Italian standard values with the exception of Cadmium and Mercury. These heavy metals should be considered in the planned sampling campaign. Originality/value – This study will estimate environmental benefits and both methodology and monitoring techniques can be extended to other cities in Italy and Europe.

The impact of service quality, trust and satisfaction on young citizen loyalty towards government e-services

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Abdullah Alkraiji ◽  
Nisreen Ameen
Keyword(s):  
Saudi Arabia ◽  
Service Quality ◽  
Structural Equation ◽  
Trust In Government ◽  
Ministry Of Education ◽  
Quality Model ◽  
Content Type ◽  
Citizen Satisfaction ◽  
Government Services ◽  
The Impact

PurposeThis study examines the effect of multidimensional constructs on citizen loyalty to e-government services. More specifically, it examines the effects of service quality, trust and satisfaction on loyalty to these services.Design/methodology/approachThe data were collected via a questionnaire that was completed by 780 foundation-year students in government universities in Saudi Arabia. The students who participated in the study had used a unified system provided by the Ministry of Education in Saudi Arabia for university admission. The data were analysed using structural equation modelling.FindingsThe key findings revealed that the factors service quality, trust in government, trust in e-government services and citizen satisfaction play a significant role in developing citizen loyalty to e-government services. Trust in government has the strongest direct effect on citizen loyalty to e-government services, and service quality has the strongest total effect on citizen loyalty. In contrast, citizen satisfaction has the least significant influence on citizen loyalty to e-government services.Originality/valueThis study proposes a new model for citizen loyalty to e-government services that combines the service quality model and trust theory. In addition, this study is among the first to categorise trust into three factors – trust in government, trust in e-government and disposition to trust – and integrate them into a model. Furthermore, the study reveals the roles of satisfaction and service quality in developing citizen loyalty. The findings of this study fill a gap in knowledge on citizen trust in, satisfaction with and loyalty to e-government services.

Effect of Wastewater on the Soil and Irrigation Process: A Laboratory Study

2017 ◽  
Vol 1 (1) ◽  
pp. 46-55 ◽  
Author(s):  
Athar Hussain ◽  
Manjeeta Priyadarshi ◽  
Saif Said ◽  
Suraj Negi
Keyword(s):  
Heavy Metals ◽  
Tap Water ◽  
Sewage Treatment ◽  
Daily Intake ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Treated Wastewater ◽  
Surface Water Resources ◽  
Industrial Sewage ◽  
Concentration Levels

Most of the industrial sewage effluents used for irrigation contains heavy metals which cause toxicity to crop plants as the soils are able to accumulate heavy metal for many years. The vegetables grown for the present study were irrigated with treated wastewater brought from a nearby full-scale sewage treatment plant at different compositions along with tap water as a control. The concentration levels of the Cd, Co, Cu, Mn and Zn in the soil were found to below the toxic limits as prescribed in literature. Daily Intake Metals (DIM) values suggest that the consumption of plants grown in treated wastewater and tap water is nearly free of risks, as the dietary intake limits of Cu, Fe, Zn and Mn. The Enrichment Factor for the treated wastewater irrigated soil was found in order Zn> Ni> Pb> Cr> Cu> Co> Mn> Cd. Thus, treated wastewater can be effectively used for irrigation. This will have twofold significant environmental advantages: (1) helpful to reduce the groundwater usage for irrigation and (2) helpful to reduce the stress on surface water resources.

Conditioning of oily sludges with municipal solid wastes incinerator fly ash

1997 ◽  
Vol 35 (8) ◽  
pp. 231-238 ◽  
Author(s):  
Tay Joo Hwa ◽  
S. Jeyaseelan
Keyword(s):  
Heavy Metals ◽  
Fly Ash ◽  
Specific Resistance ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Solid Wastes ◽  
Municipal Solid Wastes ◽  
Capillary Suction ◽  
Optimum Dosage

Conditioning of sludges improves dewatering characteristics and reduces the quantity of sludge to be handled. Anaerobic digested sludge collected from a sewage treatment plant contained 1.8% to 8% oil. The increase of specific resistance and capillary suction time (CST) with increasing oil content observed in these samples indicates the interference of oil in dewatering. It has been found that addition of municipal solid wastes incinerator fly ash decreases the specific resistances and capillary suction times of oily sludges rapidly up to 3% dosage. Beyond 3% fly ash, the decrease is less significant and the solids content in the sludge cake increases. This optimum dosage remains the same for sludges with varying oil contents from 1.8% to 12%. The total suspended solids of filtrate decreases with fly ash dosage but the toxic concentrations of heavy metals increases considerably. However at the optimum dosage of 3%, concentrations of heavy metals are within the limits for discharging into the sewers. The correlations of CST with the dewatering characteristics such as specific resistance, filter yield and corrected filter yield are established. These correlations can be used to obtain a quick prediction on dewaterability.

Patulibacter medicamentivorans sp. nov., isolated from activated sludge of a wastewater treatment plant

2013 ◽  
Vol 63 (Pt_7) ◽  
pp. 2588-2593 ◽  
Author(s):  
Bárbara Almeida ◽  
Ivone Vaz-Moreira ◽  
Peter Schumann ◽  
Olga C. Nunes ◽  
Gilda Carvalho ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Sequence Analysis ◽  
Type Species ◽  
Gene Sequence ◽  
Treatment Plant ◽  
Rrna Gene ◽  
Rrna Gene Sequence ◽  
Content Type ◽  
Link Type ◽  
Gene Sequence Analysis

A Gram-positive, aerobic, non-motile, non-endospore-forming rod-shaped bacterium with ibuprofen-degrading capacity, designated strain I11T, was isolated from activated sludge from a wastewater treatment plant. The major respiratory quinone was demethylmenaquinone DMK-7, C18 : 1 cis9 was the predominant fatty acid, phosphatidylglycerol was the predominant polar lipid, the cell wall contained meso-diaminopimelic acid as the diagnostic diamino acid and the G+C content of the genomic DNA was 74.1 mol%. On the basis of 16S rRNA gene sequence analysis, the closest phylogenetic neighbours of strain I11T were Patulibacter ginsengiterrae CECT 7603T (96.8 % similarity), Patulibacter minatonensis DSM 18081T (96.6 %) and Patulibacter americanus DSM 16676T (96.6 %). Phenotypic characterization supports the inclusion of strain I11T within the genus Patulibacter (phylum Actinobacteria) . However, distinctive features and 16S rRNA gene sequence analysis suggest that is represents a novel species, for which the name Patulibacter medicamentivorans sp. nov. is proposed. The type strain is I11T ( = DSM 25962T = CECT 8141T).

The determination of heavy metals in domestic sewage treatment plant wastes

1973 ◽  
Vol 2 (4) ◽  
pp. 473-482 ◽  
Author(s):  
J. C. Van Loon ◽  
J. Lichwa ◽  
D. Ruttan ◽  
J. Kinrade
Keyword(s):  
Heavy Metals ◽  
Sewage Treatment ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Domestic Sewage

Modern nanobiotechnologies for efficient detection and remediation of mercury

Sensor Review ◽  
2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Mulayam Singh Gaur ◽  
Rajni Yadav ◽  
Mamta Kushwah ◽  
Anna Nikolaevna Berlina
Keyword(s):  
Heavy Metals ◽  
Water Samples ◽  
Low Cost ◽  
High Sensitivity ◽  
Environmental Water ◽  
Mercury Ions ◽  
Content Type ◽  
Efficient Detection ◽  
Sensitivity And Selectivity ◽  
Selection Of

Purpose This information will be useful in the selection of materials and technology for the detection and removal of mercury ions at a low cost and with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. The purpose of this study is to provide the useful information for selection of materials and technology to detect and remove the mercury ions from water with high sensitivity and selectivity. Design/methodology/approach Different nano- and bio-materials allowed for the development of a variety of biosensors – colorimetric, chemiluminescent, electrochemical, whole-cell and aptasensors – are described. The materials used for their development also make it possible to use them in removing heavy metals, which are toxic contaminants, from environmental water samples. Findings This review focuses on different technologies, tools and materials for mercury (heavy metals) detection and remediation to environmental samples. Originality/value This review gives up-to-date and systemic information on modern nanotechnology methods for heavy metal detection. Different recognition molecules and nanomaterials have been discussed for remediation to water samples. The present review may provide valuable information to researchers regarding novel mercury ions detection sensors and encourage them for further research/development.

Application of a methodological approach to compare ontologies

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yudith Cardinale ◽  
Maria Alejandra Cornejo-Lupa ◽  
Alexander Pinto-De la Gala ◽  
Regina Ticona-Herrera
Keyword(s):  
Domain Knowledge ◽  
Design Methodology ◽  
Methodological Approach ◽  
Quality Model ◽  
Specific Domain ◽  
Content Type ◽  
Localization And Mapping ◽  
Golden Standard ◽  
Knowledge Levels ◽  
Practical Implications

Purpose This study aims to the OQuaRE quality model to the developed methodology. Design/methodology/approach Ontologies are formal, well-defined and flexible representations of knowledge related to a specific domain. They provide the base to develop efficient and interoperable solutions. Hence, a proliferation of ontologies in many domains is unleashed. Then, it is necessary to define how to compare such ontologies to decide which one is the most suitable for the specific needs of users/developers. As the emerging development of ontologies, several studies have proposed criteria to evaluate them. Findings In a previous study, the authors propose a methodological process to qualitatively and quantitatively compare ontologies at Lexical, Structural and Domain Knowledge levels, considering correctness and quality perspectives. As the evaluation methods of the proposal are based on a golden-standard, it can be customized to compare ontologies in any domain. Practical implications To show the suitability of the proposal, the authors apply the methodological approach to conduct comparative studies of ontologies in two different domains, one in the robotic area, in particular for the simultaneous localization and mapping (SLAM) problem; and the other one, in the cultural heritage domain. With these cases of study, the authors demonstrate that with this methodological comparative process, we are able to identify the strengths and weaknesses of ontologies, as well as the gaps still needed to fill in the target domains. Originality/value Using these metrics and the quality model from OQuaRE, the authors are incorporating a standard of software engineering at the quality validation into the Semantic Web.

Residents’ attitudes toward tourism development at Al-Juhfa, Saudi Arabia

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ali Ahmad Algassim ◽  
Akhmad Saufi ◽  
Diswandi Diswandi ◽  
Noel Scott
Keyword(s):  
Saudi Arabia ◽  
Social Exchange ◽  
Social Exchange Theory ◽  
Tourism Development ◽  
Structured Interview ◽  
Environmental Benefits ◽  
Structured Interviews ◽  
Content Type ◽  
Negative Impacts ◽  
Residents Attitudes

Purpose Al-Juhfa is a small village located near Rabigh City, between Makkah and Madinah, Saudi Arabia, with significant archaeological and religious resources. The purpose of this paper is to examine residents’ attitudes toward tourism development at Al-Juhfa. Design/methodology/approach The qualitative study uses purposive interviewing to recruit informants. Data was collected using semi-structured interview and open-ended questions. Eight semi-structured interviews were made and a list of open-ended questions was distributed to 134 informants. All data were analysed and no new codes were found after the answer of the first 49 informants analysed. Findings The results show that residents’ attitudes toward tourism development in general were positive with residents expecting to receive economic, social and environmental benefits. Residents were aware of potential positive and negative impacts of tourism development and appeared to balance these in developing their attitudes. Tourism was seen to empower residents and the religiosity of the community influenced their perception of tourism development. Originality/value This study contributes to the literature by supporting the use of social exchange theory in this context and by recommending the inclusion of religiosity in further studies.

scholarly journals Association of Antibiotic and Heavy Metal Resistant Bacteria Screened from Wastewater

2018 ◽  
Vol 7 (1) ◽  
pp. 28-40
Author(s):  
Bikram Gautam ◽  
Rameshwar Adhikari
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Antibiotic Resistance ◽  
Treatment Plant ◽  
Resistance Pattern ◽  
Resistant Bacteria ◽  
Grab Sampling ◽  
Antibiotic Resistance Pattern ◽  
Antibiotic Susceptibility Test ◽  
Heavy Metal Resistant

Wastewater treatment plant is a potential reservoir contributing to the evolution and spread of heavy metal and antibiotic resistant bacteria. The pollutants such as biocides, antibiotics, heavy metals are to be feared for as they have been known to evoke resistance in microorganisms in such polluted environment. The aim of this study was to the isolate bacteria from the treated wastewater and assess the resistance pattern of the isolates against antibiotics and heavy metals. Grab sampling was performed from April to June 2017, from the treated effluent from the secondary treatment plant. To assess the resistance pattern for antibiotic(s) and heavy metal(s), antibiotic susceptibility test and minimum inhibitory concentration by cup well method were performed respectively. Staphylococcus aureus, Enterococcus faecalis, Citrobacter freundii, Escherichia coli, Enterobacter aerogenes, Proteus mirabilis, P. vulgaris, Salmonella Typhi, Pseudomonas aeruginosa were isolated. Multi drug and heavy metal resistant isolates were screened. Fisher’s exact test revealed that there is a significant association (p< 0.001) between antibiotic resistance pattern and resistance patterns at dilution of 2500 g/L (25%). Cramer’s V test revealed that the effect size of antibiotic resistance pattern and heavy metal resistance pattern at dilution 2500 g/L is medium. P. aeruginosa was able to resist the metal concentration up to 10000 g/L (100%) dilution of Fe++. Heavy metal resistant bacteria can be safely used to lower chemical concentration in the environment once their harmful genes are edited, knocked etc. so that risks of evoking antibiotic resistance could be minimized. 

Removal of Heavy Metals from Industrial Effluent by Crossflow Microfiltration

1992 ◽  
Vol 25 (10) ◽  
pp. 55-67 ◽  
Author(s):  
R. C. Squires
Keyword(s):  
Heavy Metals ◽  
Pilot Trial ◽  
Industrial Effluent ◽  
Sewage Treatment Plant ◽  
Treatment Plant ◽  
Sodium Sulphate ◽  
The Other ◽  
Operating Costs ◽  
Treated Effluent ◽  
Crossflow Microfiltration

The performance of Exxflow, a patented form of crossflow microfiltration, treating industrial wastewaters containing mixed heavy metals discharged by two types of industry is quantified and compared with the traditional technologies used for such treatment. Pilot trial results using Exxflow are shown and compared to the performance of the full scale plants now operating on these effluents. The operating costs of the Exxflow process are estimated for the two plants. One of which has been operating for 18 months and the other about 4 months. The Exxflow process is described and improvements which are being developed to lower the operating costs are presented. It is shown that industrial effluents containing mixed heavy metals are very effectively treated by the Exxflow process and since the installation of the plants the treated effluent has been of a quality suitable for discharge to the River Thames in one case and to a sewage treatment plant in the other. Unlike other processes, Exxflow has shown that it can successfully treat effluent containing mixed metals and that removal of antimony from mixed metal waste waters is affected by the concentration of sodium sulphate in the wastewater.

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