Advantages and disadvantages of techniques used for wastewater treatment

Abstract

During the last 30 years, environmental issues about the chemical and biological contaminations of water have become a major concern for society, public authorities and the industry. Most domestic and industrial activities produce wastewaters containing undesirable toxic contaminants. In this context, a constant effort must be made to protect water resources. Current wastewater treatment methods involve a combination of physical, chemical and biological processes, and operations to remove insoluble particles and soluble contaminants from effluents. This article provides an overview of methods for wastewater treatment, and describes the advantages and disadvantages of available technologies.

Accelerated ZnMoO4 photocatalytic degradation of pirimicarb under UV light mediated by peroxymonosulfate

“…For instance, adsorption methods are based on the phase transfer of pollutants without transformation into nontoxic derivatives, while biological treatments are lengthy with slow kinetics and they require disposal of activated sludges. [12,13] Meanwhile, research in multidisciplinary fields such as electrochemistry, photophysics and catalysis has emerged as a strong platform to advance practical solutions to various substantial environmental problems. [14][15][16][17][18] Semiconductors have been actively investigated in water treatment applications leading to efficient catalytic photodegradations of a variety of pollutants into completely non-toxic or less harmful products.…”

Shapes Control of Bi2WO6 Nano-Structures as Photo-Fenton Catalysts for Pulping Wastewater Treatment

“…The primary physicochemical strategy was employed for removing colloidal particles, suspended solids, floating matters, toxic compounds, and colors from wastewaters [12,13]. The main steps include screening, sedimentation, flotation, flocculation, and coagulation [14]. Secondary biochemical treatment is the combination of anaerobic and aerobic treatment processes, which is efficient and economical for the treatment of soluble biodegradable organic components [15].…”

Degradation Pattern of Textile Effluent by Using Bio and Sono Chemical Reactor

“…ere are several dye removal techniques ( Figure 1) which are classified as chemical, physical, and biological methods. Physical method for removing dyes includes adsorption, ion exchange, and filtration/coagulation methods [21,22], while chemical methods include ozonisation, Fenton reagent, and photocatalytic reactions and biological methods include aerobic degradation, anaerobic degradation, biosorption, etc. e utilization of film-based procedures in such cases can viably surmount a large portion of these disadvantages.…”