Aged refuse-based bioreactor (ARB) is widely used in wastewater treatment.
Review on pollutant removal efficiencies in wastewater using ARB.
Wastewaters from different sources treated by ARB are discussed.
Factors affecting the pollutants removal in ARB operation are focused.
It provides a sustainable approach to treat various wastewaters & leachate.
ABSTRACT
Municipal landfilling has remained the universal method for solid waste disposal; however, its limitation is the generation of landfill leachate, which is a major environmental issue. The aged refuse-based bioreactor/biofilter (ARB) can remove numerous pollutants from various wastewaters using the principle of waste control by waste. It can remove organic pollutants also. Wastewater treatment by ARBs has been proved to be technically practicable, environmental friendly, economically favorable and simple to operate than other conventional biological methods. Researchers have carried out diverse studies centered on operational and environmental factors including temperatures, loading rates, height of aged refuse, and aerobic or anaerobic conditions. To this end, this article takes an overview of significant pollutant removal efficiencies using ARB in wastewater treatment, highlighting particularly landfill leachate, sewage and livestock wastewater. As the construction of new landfills is not an easy task, it is rather practicable to reclaim and excavate aged refuse from landfills in order to utilize it and at the same time to provide more space for new waste at site.
To cite this article: Nik Daud NN, Anijiofor SC, Ahsan A. An overview of treatment efficiencies for various wastewaters using aged refuse based bio-reactors. Journal of Desalination and Water Purification 2015;1(1):12-20.
Oxidative removal of methyl red dye by Fe supported pumice in the presence of H2O2
D.I. Çifçi1,*, S. Meriç1
HIGHLIGHTS
Adsorption and oxidation of MR is increased by Fe-pumice (Fe-P) composite.
Fe-P composite is a cost-effective adsorbent for dye removal.
MR removal data obeyed Pseudo first order kinetics.
Pumice abates pollution and color threats aquatic-life.
pH is the most important parameter to influence the efficiency.
ABSTRACT
The main objective of this study is to evaluate the removal of Methyl Red (MR) dye from aqueous solution using Fe supported Pumice (Fe-P) and H2O2. The effects of Fe-P and H2O2 concentration, as well as, solution of pH on MR removal were investigated. The results showed that all parameters have significant effect on MR dye removal. The MR removal efficiency increased with increasing Fe-P dose and the oxidation time decreased to 0.5 h at 5 g/L Fe-P dose. Similarly, MR removal increased when H2O2 concentration was increased from 25 to 50 mg/L. pH was observed to be the most important parameter to influence the efficiency. The Fe-P showed a high removal potential of MR dye at the optimum pH defined to be 3. Both adsorption and oxidation with hydrogen peroxide of MR removal was enhanced by Fe support of pumice. The results of this study emphasize that Fe-P composite can be used as a cost-effective adsorbent for dye removal. About 95% of MR removal was obtained using Fe-P composite by adding H2O2 after 1 h oxidation.
To cite this article: Cifci DI, Meric S. Oxidative removal of methyl red dye by Fe supported pumice in the presence of H2O2. Journal of Desalination and Water Purification 2015;1(1):6-11.
Emerging trends in water purification and desalination in India
P.K. Tewari
HIGHLIGHTS
Thermal and membrane based technologies for water purification are the global trend emerging.
Water recycle has the high potential in industrial sectors leading to zero liquid discharge.
Membrane based technologies can play an important role in cleaning of water bodies.
Field of desalination and water purification today requires the R&D leading to product development.
Basic R&D work for paper publication may not be fruitful without resulting into technology development.
ABSTRACT
This article presents the trends in water purification and desalination in India. The issues and challenges related to water problems have been brought out. There are areas in the country which face perennial water shortage. In addition, a significant number of villages suffer from excess salinity, fluoride, iron, arsenic, heavy metals and microbial contaminations in groundwater. Adding to the general concern over the sustainable use of water, are the uncertainties about the possible impact of global climate change. The article presents some of the details of the water purification and treatment methods useful for the rural and remote areas.
To cite this article: Tewari, PK. Emerging trends in water purification and desalination in India. Journal of Desalination and Water Purification 2015;1(1):3-5.
Renewable energy is the solution of the growing problems of energy and desalination
Guillermo Zaragoza
The required energy consumption for desalination is a growing matter of concern. The total installed capacity of desalination worldwide exceeds 85.2 Mm3/day. This involves an energy use of at least 100 TWh/year, which is roughly 8.6 Mtoe (to get an idea, this is about 10% the total primary energy consumption in Malaysia and 30% that in Norway). The desalination industry expects the operating capacity to double in the next ten years, which will create serious energy problems. Technical solutions are needed. The reduction of the energy use in desalination has been an objective of research for some time, and in some cases the minimum theoretical work of separation is not too far. But not every effort must be focused on this hard to achieve goal. The incorporation of sustainable energy in desalination is a more attainable alternative that must also be considered, especially due to the geographical coincidence of water deficits with an abundance of renewable energy sources, principally solar and wind energy, but also waste heat from industries..
To cite this article: Zaragoza G. Renewable energy is the solution of the growing problems of energy and desalination. Journal of Desalination and Water Purification 2015;1(1):1-2.
