Encyclopedia
Scholarly Community
Encyclopedia
Entry
Video
Image
Journal
Book
News
About
Entry
Entry
Video
Image
Log in/Sign up
Submit
Entry
Video
Image
Subject:
All Disciplines
Arts & Humanities
Biology & Life Sciences
Business & Economics
Chemistry & Materials Science
Computer Science & Mathematics
Engineering
Environmental & Earth Sciences
Medicine & Pharmacology
Physical Sciences
Public Health & Healthcare
Social Sciences
Sort:
Hottest
Latest
Alphabetical (A-Z)
Alphabetical (Z-A)
Type:
All
Topic Review
Biography
Topic Review
Water-Saving Technologies for Rice Production
In the face of the negative impacts of climate change and the accelerated growth of the global population, precision irrigation is important to conserve water resources, improve rice productivity and promote overall efficient rice cultivation, as rice is a rather water-intensive crop than other crops. Water-saving technologies for rice cultivation are varied and can be classified into three groups: water-saving irrigation systems; water-saving irrigation methods and water-saving agronomic practices.
356
25 Jun 2023
Topic Review
Water Treatment Using Functional Composites
Due to its low cost, biosorption technology has been extensively carried out to treat heavy metal-laden wastewater using biosorbents. The studies on heavy metal biosorption mechanisms and the simulation of mathematical modeling on the biosorption process have enhanced scientific understanding about the binding between target metal cations and the functional group on different surfaces of biomasses as a biosorbent.
400
21 Feb 2023
Topic Review
Water Treatment Residues and Methanogenic Activity in Wastewater-Sludge
The effect of adding alum water treatment residues (WTR) on the methanogenic activity in the digestion of primary domestic wastewater sludge was evaluated through laboratory experiments in sedimentation columns, using total suspended solids (TSS) concentrations from 0.37 to 1.23 g/L. The addition of WTR to primary clarifiers can benefit its effluent water quality in terms of colour, turbidity, chemical oxygen demand (COD), and TSS. However, the presence of WTR can negatively influence the production of methane gas during organic sludge digestion in primary clarifiers, for concentrations of TSS between 14.43 and 25.23 g/L and of VSS between 10.2 and 11.85 g/L. The activity of the Methanothrix sp., curved bacilli, methanococci, and Methanosarcina sp. decreases considerably after 16 days of anaerobic digestion, and methane production seems to only be associated with fluorescent methanogenic bacilli.
729
17 Mar 2022
Topic Review
Water Treatment Plant Sludge Dewatering
Using geotextile tubes as dewatering technology may significantly contribute to sustainable treatment of sludge generated in different industries, such as the water industry. This is an economical alternative for dewatering sludge from a Water Treatment Plant (WTP), which prevents sludge from being directly deposited in water bodies and makes it possible to then transfer the sludge to landfills.
1.1K
27 Oct 2020
Topic Review
Water Splitting by MnO
x
/Na
2
CO
3
Reversible Redox Reactions
Hydrogen is referred to as a secondary energy carrier, made from a primary energy source (nowadays, ~95% from fossil fuels). The global transition to hydrogen as an energy carrier accompanies the rise in required “green” energy. The H2 production by the different MnOx/Na2CO3 reactants was repeated in the solar reactor. Temperatures of the outer reactor wall were limited to below ~1000 °C (strength limitation of the Incoloy construction material). Due to the inertia of the heliostat focusing, temperatures in the bed varied between about 760 and 790 °C (average 775 °C) and between 815 and 835 °C (average 825 °C). Mostly, the first H2 production cycle was investigated. For the cold mix Mn3O4/Na2CO3, the reactants after H2 production were regenerated for 6 h at an average 825 °C using pure CO2.
267
06 Jul 2022
Topic Review
Water Reuse Treatment Technologies
Treating water for water reuse typically involves treating wastewater in several steps consisting of preliminary treatment, primary treatment, and secondary treatment. Tertiary treatment and advanced treatment may be needed for water reuse purposes.
936
18 May 2023
Topic Review
Water Resilience
Analyze from a holistic and comprehensive perspective the water resource in the water cycle context and its relationships in the various environments for the strategic approach to resilience as a way to sustainability.
827
03 Feb 2022
Topic Review
Water Quality Assessment
Various human activities have been the main causes of surface water pollution. The uneven distribution of industrial enterprises in the territories of the main river basins of Ukraine do not always allow the real state of the water quality to be assessed.
463
23 May 2022
Topic Review
Water Nutrient Management in Soilless Plant Cultivation
Under-cover soilless cultivation is an important technique of crop production. Due to the lack of contact with soil and precipitation, the root system of crops grown must be provided with water and all necessary nutrients in the form of a solution (nutrient medium). This nutrient medium needs to be fed in excess to ensure proper plant development and the expected qualitative and quantitative parameters of the crop yield, which means that in the case of, e.g., tomato cultivation, 20–80% of the supplied medium must be removed from the root system and managed. Uncontrolled discharge of this drainage water poses a significant threat to the environment, causing contamination of surface waters and groundwaters.
328
05 Jan 2024
Topic Review
Water Extraction from the Atmosphere for Arid Zones
The air may be used as a sustainable water supply because it contains over 14,000 km3 of water vapor. There are two methods for extracting water from ambient air. The first approach entails lowering the temperature of humid ambient air to below the dew point. The second method entails sucking water vapor from moist ambient air with a solid adsorbent and a liquid absorbent and then retrieving the water by heating the absorbent and liquefying the evaporated water. Dew water appears to be an easy way to supplement drinking water supplies in a few parts of the world. Small animals and plants are the primary consumers of dew water, as it is necessary for maintaining their activities in a semiarid or dry environment.
3.0K
12 Jan 2022
Page
of
677
Featured Entry Collections
>>
Featured Books
>>
Encyclopedia of Social Sciences
Chief Editor:
Michael McAleer
Encyclopedia of COVID-19
Chief Editor:
Stephen Bustin
Encyclopedia of Fungi
Chief Editor:
Luis V. Lopez-Llorca
Encyclopedia of Digital Society, Industry 5.0 and Smart City
Chief Editor:
Sandro Serpa
Entry
Video
Image
Journal
Book
News
About
Log in/Sign up
New Entry
New Video
New Images
About
Terms and Conditions
Privacy Policy
Advisory Board
Contact
Partner
Video Production Service
Feedback
Top
Feedback
×
Help Center
Browse our user manual, common Q&A, author guidelines, etc.
Rate your experience
Let us know your experience and what we could improve.
Report an error
Is something wrong? Please let us know!
Other feedback
Other feedback you would like to report.
×
Did you find what you were looking for?
Love
Like
Neutral
Dislike
Hate
0
/500
Email
Do you agree to share your valuable feedback publicly on
Encyclopedia
’s homepage?
Yes, I agree. Encyclopedia can post it.
No, I do not agree. I would not like to post my testimonial.
Webpage
Upload a screenshot
(Max file size 2MB)
Submit
Back
Close
×