Treatment of saline wastewater using physicochemical, biological, and hybrid processes: Insights into inhibition mechanisms, treatment efficiencies and performance enhancement

Srivastava, Ashish; Parida, Vishal Kumar; Majumder, Abhradeep; Gupta, B. R.; Gupta, Ashok Kumar

doi:10.1016/j.jece.2021.105775

Cited by 101 publications

(16 citation statements)

References 220 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, initial biological treatment before chemical oxidation can remove the biogenic compounds as otherwise, that would compete for the expensive chemical oxidants [160]. The combined aerobic/anaerobic methods have been successfully utilized for treating saline wastewater having high COD, N, and P nutrients, therefore, this combination have possibly addressed the biological phosphorus and nitrogen removal from wastewater high in nutrients [161]. Literature study shows that the integrated biological and chemical oxidation processes enhance efficiency and lowers operational costs [162].…”

Section: Hybrid Methods Based On Biological Processesmentioning

confidence: 99%

Bioremediation of industrial effluents: A synergistic approach

Nagda

Meena

Shah³

2021

J Basic Microbiol

View full text Add to dashboard Cite

Industrial wastewater consists of inorganic and organic toxic pollutants that pose a threat to environmental sustainability. The organic pollutants are a menace to the environment and life forms than the inorganic substances and pose teratogenic, mutagenic, carcinogenic, and other serious detrimental effects on the living entities, moreover, they have a gene-altering effect on aquatic life forms and affect the soil fertility and quality. Removal of varying effluents having recalcitrant contaminants with conventional treatment technologies is strenuous. In contrast to physical and chemical methods, biological treatment methods are environmentally friendly, versatile, efficient, and technically feasible with low operational costs and energy footprints. Biological treatment is a secondary wastewater treatment system that utilizes the metabolic activities of microorganisms to oxidize or reduce inorganic and organic compounds and transform them into dense biomass, which later can be removed by the sedimentation process. Biological treatment in bioreactors is an ex situ method of bioremediation and provides the benefits of continuous monitoring under controlled parameters. This paper attempts to provide a review of bioremediation technologies discussing most concerning widespread bioreactors and advances used for different industrial effluents with their comparative merits and limitations.

show abstract

Section: Hybrid Methods Based On Biological Processesmentioning

confidence: 99%

Bioremediation of industrial effluents: A synergistic approach

Nagda

Meena

Shah³

2021

J Basic Microbiol

View full text Add to dashboard Cite

show abstract

“…But the results of researchers' studies show that per capita water consumption is much higher than the standards set in the countries [4]. That is because besides the direct consumption of water, humans consume water through the consumption of food, fruits, and even services and goods, and its amount is on average about 3400 L per day per person in the world, which is called virtual water [5]. Climatic conditions, place and time of production, management and planning, and culture and habits of people are some of the effective factors in the amount of virtual water [6].…”

Section: Introductionmentioning

confidence: 99%

Petroleum Wastewater Treatment

Beni¹,

Adel²,

Zaeimdar³

et al. 2023

Sustainable Development

View full text Add to dashboard Cite

Petroleum hydrocarbons in refinery wastewater are considered the main cause of pollution. Wastewater from oil refineries contains large amounts of oil and fat in the form of suspended particles, light and heavy hydrocarbons, phenol, and other dissolved organic substances, which cause environmental pollution if they are discharged into the environment without treatment. Usually, conventional methods of treating petroleum wastes have a lot of costs; due to the existence of sufficient area for the construction of solar distillation ponds and suitable sunlight, as well as a large number of sunny days near the equator, the solar distillation method can be used. Membrane bioreactors based on biological decomposition and biological transformation of oils and waste oil materials have provided new solutions for the biological treatment of these wastewater. In addition to these methods, Fenton’s advanced oxidation methods, electrochemical coagulation method, and membrane filtration method are mentioned in this chapter.

show abstract

“…Generally, in EO processes, it is necessary to add an amount of salt, such as NaCl, into the solution to enhance the conductivity of the system and, in parallel, trigger the in situ generation of active chlorine species. However, since saline wastewater is naturally rich in chloride ions [ 43 , 44 ], the electrochemical production of active chlorine species, including Cl 2 , HOCl, and OCl − , is clear, which means that no further addition of salt is necessary. As reported in the literature, EO successfully removes NH 4 + -NH 3 from saline water systems, but several aspects need to be further discussed.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Removal of Nitrogen Compounds from a Simulated Saline Wastewater

et al. 2023

View full text Add to dashboard Cite

In the last few years, many industrial sectors have generated and discharged large volumes of saline wastewater into the environment. In the present work, the electrochemical removal of nitrogen compounds from synthetic saline wastewater was investigated through a lab-scale experimental reactor. Experiments were carried out to examine the impacts of the operational parameters, such as electrolyte composition and concentration, applied current intensity, and initial ammoniacal nitrogen concentration, on the total nitrogen removal efficiency. Using NaCl as an electrolyte, the NTOT removal was higher than Na2SO4 and NaClO4; however, increasing the initial NaCl concentration over 250 mg·L−1 resulted in no benefits for the NTOT removal efficiency. A rise in the current intensity from 0.05 A to 0.15 A resulted in an improvement in NTOT removal. Nevertheless, a further increase to 0.25 A led to basically no enhancement of the efficiency. A lower initial ammoniacal nitrogen concentration resulted in higher removal efficiency. The highest NTOT removal (about 75%) was achieved after 90 min of treatment operating with a NaCl concentration of 250 mg·L−1 at an applied current intensity of 0.15 A and with an initial ammoniacal nitrogen concentration of 13 mg·L−1. The nitrogen degradation mechanism proposed assumes a series–parallel reaction system, with a first step in which NH4+ is in equilibrium with NH3. Moreover, the nitrogen molar balance showed that the main product of nitrogen oxidation was N2, but NO3− was also detected. Collectively, electrochemical treatment is a promising approach for the removal of nitrogen compounds from impacted saline wastewater.

show abstract

Treatment of saline wastewater using physicochemical, biological, and hybrid processes: Insights into inhibition mechanisms, treatment efficiencies and performance enhancement

Cited by 101 publications

References 220 publications

Bioremediation of industrial effluents: A synergistic approach

Bioremediation of industrial effluents: A synergistic approach

Petroleum Wastewater Treatment

Electrochemical Removal of Nitrogen Compounds from a Simulated Saline Wastewater

Contact Info

Product

Resources

About