scholarly journals Evaluation of Marmara Sea Bays in terms of Pressure-Impact Status and Eutrophication

2021 ◽  
Vol 4 (2) ◽  
pp. 169-180
Author(s):  
İbrahim Tan
Keyword(s):  
Surface Water Quality ◽  
Marmara Sea ◽  
Moderate Pressure ◽  
Urban Wastewater ◽  
Index Method ◽  
Limit Values ◽  
Quality Regulation ◽  
Pressure Impact ◽  
Urban Wastewater Treatment ◽  
First Time

Closed or semi-enclosed bays in the Marmara Sea, which have long residence time, can be exposed to eutrophication as a result of organic matter enrichment from land-based pollutants. The Pressure Index method was tested for the first time in this study in order to reveal the pressure exerted by land-based sources on Izmit, Gemlik, Bandırma and Erdek Bays. As a result of the evaluation of the pressures, it was determined that the pressures on Izmit, Gemlik inner and Bandırma Bay were high, whereas Erdek and Gemlik Outer Bays were under moderate pressure. In terms of eutrophication, the nutrient, chlorophyll-a and secchi disk data of the monitoring studies carried out in the bays were compared with the limit values of the “Urban Wastewater Treatment Regulation Sensitive” and “Less Sensitive Areas Declaration and the Surface Water Quality Regulation”. Although there are differences according to the regulations, it has been determined that Izmit, Gemlik (Inner) and Bandırma Bays have eutrophic-hypertrophic conditions, Erdek and Gemlik (Outer) Bays have mesotrophic conditions. There are differences in the results due to the use of different variables and limit values in the evaluation of coastal waters by regulations. In addition to collecting regulations under a single heading, it is recommended to include biological quality elements in the eutrophication assessment.

Economic, energy and carbon footprint assessment of integrated forward osmosis membrane bioreactor (FOMBR) process in urban wastewater treatment

2020 ◽  
Vol 6 (1) ◽  
pp. 153-165 ◽  
Author(s):  
Nur Hafizah Ab Hamid ◽  
Simon Smart ◽  
David K. Wang ◽  
Kaniel Wei Jun Koh ◽  
Kalvin Jiak Chern Ng ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Carbon Footprint ◽  
Membrane Bioreactor ◽  
Forward Osmosis ◽  
Economic Feasibility ◽  
Water Reclamation ◽  
Urban Wastewater ◽  
Potential Applications ◽  
Carbon Footprint Assessment ◽  
Urban Wastewater Treatment

This study systematically explores the potential applications of forward osmosis (FO) membrane based technology in urban wastewater treatment and water reclamation for their techno-economic feasibility and sustainability.

Comparative Kinetic Study of Carrier Type in a Moving Bed System Applied to Organic Matter Removal in Urban Wastewater Treatment

2011 ◽  
Vol 223 (4) ◽  
pp. 1699-1712 ◽  
Author(s):  
J. Martín-Pascual ◽  
C. López-López ◽  
A. Cerdá ◽  
J. González-López ◽  
E. Hontoria ◽  
...  
Keyword(s):  
Organic Matter ◽  
Wastewater Treatment ◽  
Kinetic Study ◽  
Urban Wastewater ◽  
Organic Matter Removal ◽  
Moving Bed ◽  
Urban Wastewater Treatment

Life Cycle Assessment of Urban Wastewater Treatment

2014 ◽  
Vol 535 ◽  
pp. 346-349
Author(s):  
Mei Wang ◽  
Ming Yang ◽  
Jun Liu ◽  
Jian Fen Li
Keyword(s):  
Wastewater Treatment ◽  
Life Cycle Assessment ◽  
Life Cycle ◽  
Wastewater Treatment Plant ◽  
Sewage Treatment ◽  
Treatment Plant ◽  
Urban Wastewater ◽  
Urban Sewage ◽  
Urban Wastewater Treatment ◽  
Whole Life Cycle

Effect and benefits of a product or service could be analyzed and evaluated by life cycle assessment during the whole life cycle. Urban sewage treatment plants could improve and control urban water pollution escalating, but it also had certain harm to environment. Effect and benefits of urban wastewater treatment plant A and B were analyzed and evaluated, 13 factors were selected, and comprehensive benefits were researched quantificationally using the method of analytic hierarchy process. It found that urban wastewater treatment plant A who applied A/O process had better benefits than urban wastewater treatment plant B who applied BIOLAK process.

Extractable Fractions of Metals in Sewage Sludges from Five Typical Urban Wastewater Treatment Plants of China

Pedosphere ◽  
2006 ◽  
Vol 16 (6) ◽  
pp. 756-761 ◽  
Author(s):  
Chao WANG ◽  
Xiao-Chen LI ◽  
Pei-Fang WANG ◽  
Li-Min ZOU ◽  
Hai-Tao MA
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
Urban Wastewater ◽  
Sewage Sludges ◽  
Urban Wastewater Treatment

scholarly journals Application of Catalytic Wet Peroxide Oxidation for Industrial and Urban Wastewater Treatment: A Review

Catalysts ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 673 ◽  
Author(s):  
Juan Rueda Márquez ◽  
Irina Levchuk ◽  
Mika Sillanpää
Keyword(s):  
Wastewater Treatment ◽  
Advanced Oxidation Process ◽  
Fixed Bed ◽  
Toxicity Assessment ◽  
Batch Reactors ◽  
Peroxide Oxidation ◽  
Urban Wastewater ◽  
Wet Peroxide Oxidation ◽  
Catalytic Wet Peroxide Oxidation ◽  
Urban Wastewater Treatment

Catalytic wet peroxide oxidation (CWPO) is emerging as an advanced oxidation process (AOP) of significant promise, which is mainly due to its efficiency for the decomposition of recalcitrant organic compounds in industrial and urban wastewaters and relatively low operating costs. In current study, we have systemised and critically discussed the feasibility of CWPO for industrial and urban wastewater treatment. More specifically, types of catalysts the effect of pH, temperature, and hydrogen peroxide concentrations on the efficiency of CWPO were taken into consideration. The operating and maintenance costs of CWPO applied to wastewater treatment and toxicity assessment were also discussed. Knowledge gaps were identified and summarised. The main conclusions of this work are: (i) catalyst leaching and deactivation is one of the main problematic issues; (ii) majority of studies were performed in semi-batch and batch reactors, while continuous fixed bed reactors were not extensively studied for treatment of real wastewaters; (iii) toxicity of wastewaters treated by CWPO is of key importance for possible application, however it was not studied thoroughly; and, (iv) CWPO can be regarded as economically viable for wastewater treatment, especially when conducted at ambient temperature and natural pH of wastewater.

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