Wastewater management in coastal urban areas: the case of Greece

2002 ◽  
Vol 46 (8) ◽  
pp. 177-186 ◽  
Author(s):  
P.A. Paraskevas ◽  
D.L. Giokas ◽  
T.D. Lekkas
Keyword(s):  
Wastewater Treatment ◽  
Urban Areas ◽  
Industrial Wastewater ◽  
Treatment Strategies ◽  
Treated Wastewater ◽  
Wastewater Management ◽  
Eu Legislation ◽  
Of Greece ◽  
The Eu

The continuously increasing quantities of municipal and industrial wastewater discharged into the sea environment degrade the quality of the water. In this paper, the recent technologies are evaluated, and the practices recommended for the wastewater treatment in coastal urban areas are analyzed, with respect to the requirements of the EU legislation. Also the principles for the disposal of the treated wastewater are discussed. Finally, a brief review of the current situation of wastewater management in Greece is given, regarding the treatment strategies previously presented.

scholarly journals Comparison of Biological and Nanofiltration methods to reduce the BOD5 of industrial wastewater for the reuse and access to sustainable water resources in urban areas, A case study of Najaf Abad in Iran

2020 ◽  
Vol 2 (1) ◽  
pp. 30-37
Author(s):  
Mohammad Mahdi Kohansal ◽  
Sara Saadati ◽  
Saeid Eslamian
Keyword(s):  
Wastewater Treatment ◽  
Urban Areas ◽  
Industrial Wastewater ◽  
Treatment Plant ◽  
Quality Parameters ◽  
Sustainable Urban Development ◽  
Treated Wastewater ◽  
Biological Method ◽  
Industrial Growth ◽  
The Mean

The rapid increase of human population accompanied by industrial growth and rising standards of living has resulted in heavy demand for water across all sectors. So, treated wastewater could be an unlimited and stable alternative for water supply to use in irrigation and industry and plays an important role to achieve sustainable urban development. Nowadays, finding an appropriate wastewater treatment & reuse method is one of the important issues which many research has been conducted in this field. The aim of this study was to compare the treated wastewater (industrial) by biological method compared to the nanofiltration method and determine more suitable method for industrial wastewater treatment. Thus, BOD5 of industrial wastewater was used for this purpose and the appropriate method was chosen by calculating the percentage and percentage of this parameter as well as analyzing the significance of the difference between the results of the two methods used by SPSS software. The nanofilter used in the study was made from carbon-neon and the pressure of its desired performance has been 10 times and the diameter of the stomata is 50-80 nm. Also, all experiments were performed weekly for a period of 11 weeks in Najaf Abad wastewater treatment plant. The results showed that the mean BOD5 = 6.87 mg / L measured by nanofiltration method while the mean BOD5 is 9.91 mg / L by biological method. According to the results, the nanofiltration method is more effective than the biological method. Nanofiltration method is suggested to prove the superiority and other water quality parameters are also tested.

Industrial Wastewater Treatment and Reuse in a Developing Country Context: Evidence at the Firm Level from Ecuador

2018 ◽  
Vol 04 (02) ◽  
pp. 1750005 ◽  
Author(s):  
Oscar Zapata
Keyword(s):  
Wastewater Treatment ◽  
Production Process ◽  
Developing Country ◽  
Industrial Wastewater ◽  
Public Perception ◽  
Wastewater Reuse ◽  
Industrial Sector ◽  
Wastewater Management ◽  
Firm Level ◽  
Local Conditions

Wastewater reuse constitutes an alternative supply source of water. It not only increases the amount of water available but also reduces water pollution. The benefits and costs of this practice, and the public perception of reuse are the focus of several studies. However, the evidence on industrial wastewater reuse at the firm level remains scant. This paper is aimed at filling this gap by presenting evidence on the determinants of both wastewater treatment and reuse practices in a developing country context. I use firm level data from the Survey on Firms’ Environmental Practices of Ecuador. My results show that wastewater management in general, and reuse in particular, are still limited practices in the industrial sector of the country. My results suggest that firm’s decisions to treat and reuse depends on long-term firm’s characteristics, such as annual investment, the nature of the production process and local conditions, as well as the scale of production and water consumption. Volumes of wastewater treated and reused depend positively on the amount of water used in the production process and the firm’s annual level of investment or expenditure. The cost of the practice only affects the volume treated. The results suggest that targeting water-intensive industry sectors and the costs of wastewater treatment can play an important role for a more sustainable use of water in the industrial sector of Ecuador.

The performance of batch stabilization reservoirs for wastewater treatment, storage and reuse in Israel

1996 ◽  
Vol 33 (10-11) ◽  
pp. 149-159 ◽  
Author(s):  
Marcelo Juanico
Keyword(s):  
Wastewater Treatment ◽  
Controlled Release ◽  
Treated Wastewater ◽  
Batch Reactors ◽  
Batch Mode ◽  
Removal Of Heavy Metals ◽  
In Series ◽  
Order Of Magnitude ◽  
Real Scale

Stabilization reservoirs receive partially treated wastewater effluents for storage and controlled release. They are used in Israel for two purposes: a) to upgrade the quality of the effluents during the long residence time within the reservoirs and, b) to store the effluents during the rainy winter in order to perform agricultural irrigation during the dry summer. The improvement obtained in the quality of the effluents (i.e., the treatment capacity of the reservoirs) depends on the operational regime of the reservoirs as reactors: continuous flow, in series, batch, etc. The performance of the reservoirs as batch reactors for wastewater treatment is herein analyzed based on outdoor experiments carried out in real scale reservoirs with different hydraulic and organic loadings. The results of the experiments are compared with forecasts obtained through statistical and kinetic models. Stabilization reservoirs working in batch mode, when properly designed and operated, are able to remove COD, BOD, TSS and detergents by up to one order of magnitude, and Faecal coliforms by up to five orders of magnitude (before chlorination). A significant removal of heavy metals, bacteriophages and other pollutants is also obtained. The quality of the effluents released from the reservoirs, added to the capability for controlled release, permits both wide crop rotation and easy management of irrigation.

Approximating Ukraine’s Laws to Those of the European Union Concerning Meat and Meat Products Cold Chain

2020 ◽  
Vol 9 (3) ◽  
pp. 978
Author(s):  
Kateryna O. RODIONOVA ◽  
Volodymyr M. STESHENKO ◽  
Ivan V. YATSENKO
Keyword(s):  
European Union ◽  
Meat Products ◽  
Legal Regulation ◽  
Cold Chain ◽  
The European Union ◽  
Meat Processing ◽  
Processing Industry ◽  
Eu Legislation ◽  
The Eu

The main objectives of the research were such: to define the concept of cold chain as an object of legal regulation; to find out the content and features of the EU legislation on the safety and quality of meat and meat products during cold chain and its use in Ukraine; to characterize the legal bases of the current legislation of Ukraine on ensuring the safety and quality of meat and meat products during cold chain, to formulate proposals and recommendations aimed at improving the national legislation of Ukraine by approximating it to the EU legislation, which sets requirements for the safety and quality of meat and meat products throughout cold chain. To achieve the abovementioned objectives, the following methods were used: comparative legal, analytical, systemic, dialectical, generalizing, specific-search, structural-functional, semantic, methods of deduction and induction, etc. The content and features of the legal regulation of the safety and quality of meat and meat products in the current legislation of the European Union and Ukraine have been clarified. For the first time, the definition of the term 'cold chain' has been proposed by reference to it in author's editorial, which should influence its clearer scientific and practical understanding. It is determined that the temperature regimes of cold processing, storage and transportation of meat and meat products in Ukraine are regulated by a large number of legal acts, in particular: national standards of Ukraine (DSTU), technical regulations, technological instructions, rules of transportation, etc. It is found that national legal acts do not provide a systematic understanding of the particularities of cold chain legal regulation in the meat processing industry in order to ensure the safety and quality of meat and meat products. As a result of departmental inconsistency, the existing storage temperature parameters for the same product type in different legal acts differ from each other, which does not allow to determine the actual storage periods at different stages of the cold chain. In addition, current legal acts in Ukraine do not provide for constant monitoring of the temperature of cold-processed meat and meat products throughout all cold chain units and the hygienic condition of refrigerators throughout the shelf life. As a result, the cold chain is very difficult to be controlled and requires a large number of factors to be taken into account in order to bring safe and high-quality meat and meat products to the end consumer. According to the results of the research, proposals and recommendations are formulated to improve the national legislation of Ukraine governing the cold chain in the meat processing industry.

Industrial Wastewater Treatment and its Environmental Impact on the Zarqa River

1992 ◽  
Vol 25 (1) ◽  
pp. 61-68
Author(s):  
S. S. Al Salem
Keyword(s):  
Ground Water ◽  
Industrial Waste ◽  
Industrial Wastewater ◽  
Wastewater Management ◽  
Industrial Waste Water ◽  
River Bed ◽  
Sustainable Policy ◽  
Zarqa River ◽  
Major Surface

The Zarqa River is Jordan's major surface and ground water basin, where most of the industries are located. A summary of an industrial waste water survey is presented, with quantity and quality of the discharges and methods of disposal. Compliance with the effluent standard and the effect on the environment is discussed. It is concluded that there is contamination of surface water and a potential of contamination of ground water, the river bed and soils adjacent to the river. The existing regulation, standard and practices in industrial wastewater management are reviewed and new principles are suggested to be adopted for setting a sustainable policy in wastewater management.

scholarly journals Quality of bio-solids produced in a Spanish Wastewater Treatment Plant (Córdoba-Spain) and its use in agronomy along 2000-2019

2020 ◽  
Vol 1 (4) ◽  
pp. 9-15
Author(s):  
Rafael Marín Galvín
Keyword(s):  
Escherichia Coli ◽  
Organic Matter ◽  
Wastewater Treatment ◽  
Treatment Plant ◽  
The Other ◽  
Treated Wastewater ◽  
Urban Wastewater ◽  
Main Metal ◽  
Colony Forming Units

Bio-solids are the final fate of pollution present in urban wastewater, reaching the production of these ones in Spanish WWTPs 701,751 T/year (dates of 2018). Considering that 85% of Spanish bio-solids are used in agronomy, it is important to know characteristics of biosolids there produced, and in this way, we have investigated bio-solids generated in La Golondrina´s WWTP (Córdoba, Spain) along 2000-2019. This WWTP is a conventional facility operated by activated sludges (26.55x106 m3/year treated) which has produced 1.43 kg of bio-solids per m3 of treated wastewater (38.000 T/year). Our results indicated that bio-solids had a dryness over initial mass of 22.3%, and 74.9% of organic matter over dried matter (o.d.m.). At the same time, major components detected in bio-solids were N, P and Ca which levels were 5.0%, 3.5% and 3.7%, respectively. On the other hand, concentration of total metals in bio-solids ranged 13,024 mg/kg o.d.m., being the main metal Fe (11.749 mg/kg o.d.m.) followed by Zn, Cu and Mn, with levels as mg/kg o.d.m. of 463.1, 392.8 and 265.7, respectively. Evolution per year of all the investigated parameters are shown in the paper. Taking into account the use of bio-solids in agronomy, we have evaluated levels of metals limited by the Spanish normative to this respect: thus, the seven metals restricted (Cd, Cu, Ni, Pb, Zn, Hg and Cr) exhibited concentration in bio-solids very lower than parametric values established. Moreover, we have estimated the ratios of accumulation of organics and metals from wastewater to bio-solids: thus, organic matter, N and P, were accumulated in bio-solids respectively, 342, 356 and 643 times, and total metals, 2,632 times. Finally, levels of Escherichia coli slightly varied from wastewater to bio-solids: 1.5x108 colony-forming units/L in the first one, and 0.9x108/g (o.d.m.) in the second ones.

scholarly journals Synthetic Indicators of Quality of Subjective Life in the EU: Rural and Urban Areas

2021 ◽  
Author(s):  
María-Carmen Sánchez-Sellero ◽  
Beatriz García-Carro ◽  
Pedro Sánchez-Sellero
Keyword(s):  
Urban Areas ◽  
Rural And Urban Areas ◽  
Synthetic Indicators ◽  
Rural And Urban ◽  
The Eu

Tertiary Treatment of Livestock Wastewater in the Context of Alternative Water Resources for Sustainable Agriculture

2020 ◽  
Vol 71 (10) ◽  
pp. 161-170
Author(s):  
Carmen Tociu ◽  
Cristina Maria ◽  
Gyorgy Deak ◽  
Irina-Elena Ciobotaru ◽  
Alexandru-Anton Ivanov ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Water Resources ◽  
Water Source ◽  
Treated Wastewater ◽  
Coliform Bacteria ◽  
Soil Productivity ◽  
Nitrogen And Phosphorus ◽  
Livestock Wastewater ◽  
Alternative Water

The limited availability and quality of water resources are key issues of water management, and the protection and preservation of water resources are a requirement in the context of accelerated economic growth and principles of sustainable development. The experimental research presented in this paper is based on the need to identify alternative water sources and support unconventional wastewater treatment methods which would enable their reuse in areas affected by water scarcity and drought. Livestock wastewater contain significant levels of nutrients (nitrogen and phosphorus) and may represent an attractive water source for crop irrigation. This paper evaluates the efficacy of a proposed technological process for tertiary wastewater treatment consisting of two steps: electrochemical treatment for the removal of suspended and colloidal impurities and ozone disinfection. The experimental results showed higher efficiencies for the removal of chemical pollutants (92.5% COD, 79.3% BOD, 98.6% TSS, 41% residue saline) and significant inactivation of microorganisms (over 99.9% for total coliform bacteria and in some cases 100% for faecal coliform bacteria and faecal streptococci). The quality of the effluent complies with the regulations for wastewater use in agriculture and allows its reuse for different categories of use considering the required conditions for soil/crops. The successful application of treated wastewater to agricultural crops depends in a high extent on the good practices aimed on the improvement of crop yield and quality, optimisation of soil productivity and protection of the environment undertaken by the economic entities.

Struvite crystallization versus amorphous magnesium and calcium phosphate precipitation during the treatment of a saline industrial wastewater

2011 ◽  
Vol 64 (12) ◽  
pp. 2460-2467 ◽  
Author(s):  
D. Crutchik ◽  
J. M. Garrido
Keyword(s):  
Wastewater Treatment ◽  
Calcium Ions ◽  
Industrial Wastewater ◽  
Wastewater Treatment Plants ◽  
Calcium Phosphates ◽  
Treated Wastewater ◽  
Molar Ratio ◽  
Struvite Precipitation ◽  
Struvite Crystallization ◽  
Calcium Phosphate Precipitation

Struvite crystallization (MgNH4PO4·6H2O, MAP) could be an alternative for the sustainable and economical recovery of phosphorus from concentrated wastewater streams. Struvite precipitation is recommended for those wastewaters which have high orthophosphate concentration. However the presence of a cheap magnesium source is required in order to make the process feasible. For those wastewater treatment plants (WWTP) located near the seashore magnesium could be economically obtained using seawater. However seawater contains calcium ions that could interfere in the process, by promoting the precipitation of amorphous magnesium and calcium phosphates. Precipitates composition was affected by the NH4+/PO43− molar ratio used. Struvite or magnesium and calcium phosphates were obtained when NH4+/PO43− was fixed at 4.7 or 1.0, respectively. This study demonstrates that by manipulating the NH4+/PO43− it is possible to obtain pure struvite crystals, instead of precipitates of amorphous magnesium and calcium phosphates. This was easily performed by using either raw or secondary treated wastewater with different ammonium concentrations.

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