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A Review of the Chemistry of Anaerobic Digestion: Methods of Accelerating and Optimizing Process Efficiency
Tập 7 Số 8 - Trang 504
The anaerobic digestion technology has been in existence for centuries and its
underlying theory established for decades. It is considered a useful technology
for the generation of renewable energy, and provides means to alleviate problems
associated with low access to energy. However, a great deal of current research
is targeted towards the optimization of this technology under diverse digestion
...
Food Waste Composting and Microbial Community Structure Profiling
Tập 8 Số 6 - Trang 723
Over the last decade, food waste has been one of the major issues globally as it
brings a negative impact on the environment and health. Rotting discharges
methane, causing greenhouse effect and adverse health effects due to pathogenic
microorganisms or toxic leachates that reach agricultural land and water system.
As a solution, composting is implemented to manage and reduce food waste in line
wi...
Assessment of Wind Energy Potential for the Production of Renewable Hydrogen in Sindh Province of Pakistan
Tập 7 Số 4 - Trang 196
In this study, we developed a new hybrid mathematical model that combines
wind-speed range with the log law to derive the wind energy potential for
wind-generated hydrogen production in Pakistan. In addition, we electrolyzed
wind-generated power in order to assess the generation capacity of
wind-generated renewable hydrogen. The advantage of the Weibull model is that it
more accurately reflects po...
Preparation of KOH and H3PO4 Modified Biochar and Its Application in Methylene Blue Removal from Aqueous Solution
Tập 7 Số 12 - Trang 891
Improperly treated or directly discharged into the environment, wastewater
containing dyes can destroy the quality of water bodies and pollute the
ecological environment. The removal of dye wastewater is urgent and essential.
In this study, corn stalk was pyrolyzed to pristine biochar (CSBC) in a limited
oxygen atmosphere and modified using KOH and H3PO4 (KOH-CSBC, H3PO4-CSBC,
respectively). The b...
Aeration Process in Bioreactors as the Main Energy Consumer in a Wastewater Treatment Plant. Review of Solutions and Methods of Process Optimization
Tập 7 Số 5 - Trang 311
Due to the key role of the biological decomposition process of organic compounds
in wastewater treatment, a very important thing is appropriate aeration of
activated sludge, because microorganisms have to be supplied with an appropriate
amount of oxygen. Aeration is one of the most energy-consuming processes in the
conventional activated sludge systems of wastewater treatment technology (may
consu...
Flotation in Water and Wastewater Treatment
Tập 6 Số 8 - Trang 116
Flotation constitutes a separation process that originated from mineral
processing. Nowadays, wider applications have been found and compared to
flotation for water and wastewater treatment. Stress in the present review paper
was mainly applied to heavy metal ions recovery by flotation and the respective
mechanism followed, being either ion, precipitate, or sorptive flotation. In the
latter case, ...
Advanced Bioethanol Production: From Novel Raw Materials to Integrated Biorefineries
Tập 9 Số 2 - Trang 206
The production of so-called advanced bioethanol offers several advantages
compared to traditional bioethanol production processes in terms of
sustainability criteria. This includes, for instance, the use of nonfood crops
or residual biomass as raw material and a higher potential for reducing
greenhouse gas emissions. The present review focuses on the recent progress
related to the production of ad...
Measuring Energy Efficiency and Environmental Performance: A Case of South Asia
Tập 7 Số 6 - Trang 325
When assessing energy efficiency, most studies have frequently ignored
environmental aspects even though the concept has been widely used in the past.
This study evaluates the energy efficiency and environmental performance of
South Asia by using DEA (data envelopment analysis) like mathematical composite
indicator. We construct a comprehensive set of indicators, including an energy
self-sufficien...
A DEA Approach for Assessing the Energy, Environmental and Economic Performance of Top 20 Industrial Countries
Tập 7 Số 12 - Trang 902
Due to growing concerns of global warming, reducing carbon emissions has become
one of the major tasks for developing countries to meet the national demand for
energy policies. The objective of this study is to measure the energy
consumption, carbon emission and economic-environmental efficiency in terms of
the environmental performance of the top 20 industrial countries by employing a
data envelo...
Technology for the Remediation of Water Pollution: A Review on the Fabrication of Metal Organic Frameworks
Tập 6 Số 8 - Trang 122
The ineffective control of the release of pollutants into water has led to
serious water pollution. Compared with conditions in the past, the polluting
components in aquatic environments have become increasingly complex. Some
emerging substances have led to a new threat to the safety of water. Therefore,
developing cost-effective technologies for the remediation of water pollution is
urgently need...