scholarly journals Identification of Physical, Morphological and Chemical Particularities of Mixed Microalgae - Bacteria Granules

2019 ◽  
Vol 70 (1) ◽  
pp. 275-277
Author(s):  
Costel Bumbac ◽  
Elena Manea ◽  
Alina Banciu ◽  
Catalina Stoica ◽  
Ioana Ionescu ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Energy Cost ◽  
Treatment Strategies ◽  
Chemical Compounds ◽  
Chemical Characteristic ◽  
Technological Solution ◽  
Correlative Microscopy ◽  
Industrial Use ◽  
Aeration Process ◽  
Treatment Procedures

The growth of population has been linked with the increase usage of chemical compounds design for domestic and industrial use. At its turn, the increased amount of the chemical compound puts an enhanced stress on the environment. In such scenario, the waste management, including the wastewater treatment strategies have become an important part for the environmental protection. Unfortunately, the wastewater treatment procedures have several components which could be improved. Among them aeration process and biomass sedimentation have been the most stringent to tackle, since the aeration alone consume more than 60% from wastewater treatment energy cost. In this study, we proposed a new microalgae-bacteria activated sludge granule which could be an economical and technological solution to the above mentioned issues such as aeration and sedimentation. Moreover, during this study we characterized the physical, morphological and chemical characteristic of the newly formed granules by advances techniques such as electronic and correlative microscopy.

Technological Solution for the Treatment of Wastewater Resulting from Autochthonous Aquacultures in Order to Protect the Marine Water Quality

2018 ◽  
Vol 68 (12) ◽  
pp. 2752-2755
Author(s):  
Carmen Tociu ◽  
Tania Zaharia ◽  
Elena Diacu ◽  
Cristina Maria ◽  
Florica Marinescu ◽  
...  
Keyword(s):  
Water Quality ◽  
Wastewater Treatment ◽  
Black Sea ◽  
Pilot Scale ◽  
Integrated System ◽  
The Black Sea ◽  
Technological Solution ◽  
Aluminium Sulphate ◽  
Metallurgical Slags ◽  
Treatment Step

This paper depicts the research conducted at a micro-pilot scale on autochthonous cultures in order to develop adequate technological solutions for the treatment of wastewater resulting from shrimp cultures (Palaemonidae) that would ensure the protection of the Black Sea ecosystem and constitute an applicable tool for the development of aquaculture in Romania. The proposed objectives were attained by adopting an integrated system of marine cultures shrimps-mussels-macrophyte algae, followed by a conventional chemical treatment step using aluminium sulphate recovered from metallurgical slags. This system together with wastewater treatment ensures an optimum development of species and a minimum load of pollutants in the aquatic environment.

Sustainable development of wastewater treatment strategies for the food industries

2002 ◽  
Vol 45 (12) ◽  
pp. 315-320 ◽  
Author(s):  
I. Sekoulov
Keyword(s):  
Sustainable Development ◽  
Wastewater Treatment ◽  
Treatment Strategies ◽  
Future Generations ◽  
The Sustainable Development ◽  
Total Cost ◽  
Integrated Production ◽  
Food Industries ◽  
Production Processes ◽  
Process Wastewater

The sustainable development of environmental protection is a newly created philosophy. It means continuous development of better protection of the air, soil, water and resources, used from the industry, to be saved also for future generations. The globalization of the economy is another process, which interferes with environmental ideas, and an equilibrium with the socio-eco-sustainable development is wanted. The industry is subjected to big changes depending on economic development. Thus the treatment plants at the end of the pipe must be constructed with maximum flexibility. A removal of constructed devices, if not necessary, must be considered from the beginning as a possibility. Priority is given to integrated production processes solving wastewater problems directly by production devices. The treatment of the process wastewater streams separately will become more important. The end of the pipe solutions will be less complicated and more reliable. The reuse of valuable waste substances and treated water will reduce the total cost of the treatment plants substantially.

Power Generation and Oxygen Transfer Analyses for Micro Hydro-Turbine Installed in Wastewater Treatment Aeration Tank

2021 ◽  
pp. 1-16
Author(s):  
Abdel Rahman Salem ◽  
Alaa Hasan ◽  
Ahmad Abdelhadi ◽  
Saif Al Hamad ◽  
Mohammad Qandil ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Oxygen Transfer ◽  
Power Loss ◽  
Wastewater Treatment Plants ◽  
Aeration Tank ◽  
Hydro Turbine ◽  
Oxygen Transfer Efficiency ◽  
Aeration Process ◽  
The U.S ◽  
Water Height

Abstract This study targets one of the major energy consumers in the U.S. It suggests a new mechanical system that can recover a portion of the energy in Wastewater Treatment Plants (WWTPs). The proposed system entails a hydro-turbine installed above the air diffuser in the aeration tank to extract the water-bubble current's kinetic energy and converts it to electricity. Observing the optimum location of the turbine required multiple experiments where turbine height varies between 35% and 95% (water height percentages above the diffuser), while varying the airflow between 1.42 L/s (3 CFM) and 2.12 L/s (4.5 CFM) with a 0.24 L/s (0.5 CFM) increment. Additionally, three water heights of 38.1 cm (15”), 53.4 cm (21”), and 68.6 cm (27”) were considered to study the influence of the water height. It was noticed that the presence of the system has an adverse effect on the Standard Oxygen Transfer Efficiency (SOTE). Therefore, a small dual-blade propeller was installed right above the diffuser to directly mix the water in the bottom of the tank with the incoming air to enhance the SOTE. The results showed that the maximum reclaimed power was obtained where the hydro-turbine is installed at 65% - 80% above the diffuser. A reduction of up to 7.32% in SOTE was observed when the setup was placed inside the tank compared to the tank alone. The addition of the dual-blade propeller showed an increase in SOTE of 7.27% with a power loss of 6.21%, ensuring the aeration process was at its standards.

Sustainable metallic nanomaterials based wastewater treatment strategies: Achievements, challenges and future perspectives

Chemosphere ◽  
2021 ◽  
pp. 132606
Author(s):  
Shakeel Ahmad Bhat ◽  
Farooq Sher ◽  
Mariam Hameed ◽  
Omar Bashir ◽  
Rohitashw Kumar ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Treatment Strategies ◽  
Future Perspectives ◽  
Metallic Nanomaterials

scholarly journals Comparative study of submerged membrane bioreactor and extended aeration process coupled with tubesettler for hospital wastewater treatment

2020 ◽  
Vol 59 (6) ◽  
pp. 4633-4641
Author(s):  
Rachida El Morabet ◽  
Roohul Abad Khan ◽  
Javed Mallick ◽  
Nadeem A. Khan ◽  
Sirajuddin Ahmed ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Comparative Study ◽  
Membrane Bioreactor ◽  
Hospital Wastewater ◽  
Submerged Membrane Bioreactor ◽  
Aeration Process

scholarly journals Polyphenols with Anti-Amyloid β Aggregation Show Potential Risk of Toxicity Via Pro-Oxidant Properties

2020 ◽  
Vol 21 (10) ◽  
pp. 3561 ◽  
Author(s):  
Hatasu Kobayashi ◽  
Mariko Murata ◽  
Shosuke Kawanishi ◽  
Shinji Oikawa
Keyword(s):  
Potential Risk ◽  
Deleterious Effect ◽  
Treatment Strategies ◽  
Amyloid Β ◽  
Chemical Compounds ◽  
Inhibitory Effect ◽  
Point Of View ◽  
Considerable Evidence ◽  
Naturally Occurring ◽  
Aβ Aggregation

Alzheimer’s disease (AD) is the most common form of dementia among older people. Amyloid β (Aβ) aggregation has been the focus for a therapeutic target for the treatment of AD. Naturally occurring polyphenols have an inhibitory effect on Aβ aggregation and have attracted a lot of attention for the development of treatment strategies which could mitigate the symptoms of AD. However, considerable evidence has shown that the pro-oxidant mechanisms of polyphenols could have a deleterious effect. Our group has established an assay system to evaluate the pro-oxidant characteristics of chemical compounds, based on their reactivity with DNA. In this review, we have summarized the anti-Aβ aggregation and pro-oxidant properties of polyphenols. These findings could contribute to understanding the mechanism underlying the potential risk of polyphenols. We would like to emphasize the importance of assessing the pro-oxidant properties of polyphenols from a safety point of view.

scholarly journals The treatment of hospital wastewater: an appraisal

2006 ◽  
Vol 4 (4) ◽  
pp. 405-416 ◽  
Author(s):  
B. Pauwels ◽  
W. Verstraete
Keyword(s):  
Public Health ◽  
Drinking Water ◽  
Wastewater Treatment ◽  
Surface Waters ◽  
Chemical Compounds ◽  
Hospital Wastewater ◽  
X Ray ◽  
Microbial Strains ◽  
Special Concern ◽  
Microbial Agents

Hospitals discharge considerable amounts of chemicals and microbial agents in their wastewaters. Problem chemicals present in hospital wastewater belong to different groups, such as antibiotics, X-ray contrast agents, disinfectants and pharmaceuticals. Many of these chemical compounds resist normal wastewater treatment. They end up in surface waters where they can influence the aquatic ecosystem and interfere with the food chain. Humans are particularly exposed by the drinking water, produced from surface water. Microbial agents of special concern are multiresistant microbial strains. The latter are suspected to contribute to the spread of antibiotic resistance. In this paper, we will discuss the different approaches towards hospital wastewater treatment. The principle of uncoupling hospitals from public sewers warrants in-depth evaluation by technologists and ecotoxicologists as well as public health specialists.

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