Sustainable treatment of domestic wastewater through microalgae

Moondra, Nandini; Jariwala, Namrata; Christian, R. A.

doi:10.1080/15226514.2020.1782829

Cited by 31 publications

(12 citation statements)

References 26 publications

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“…2). The EC content of untreated DWW reported in the present study was in agreement with the observation of Moondra et al (2020).…”

Section: Properties Of Raw Domestic Wastewatersupporting

confidence: 93%

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Phytoremediation of xenobiotics – A green approach for the treatment of domestic wastewater

Durairaj¹,

Rani²,

Jeyaraj³

et al. 2023

EEC

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Remediation of xenobiotics from wastewater is highly essential due to its harmful impacts. Several chemical and physical processes are used to recover xenobiotics from wastewater, including ion exchange, reverse osmosis, electrodialysis, and ultrafiltration. However, the biological method of employing microalgae, has aroused the scientific community’s interest due to its cheap operating costs and effectiveness in absorbing and/or removing organic and elemental contaminants from wastewater. Chlorella vulgaris was used as a biological absorbent, in the remediation of domestic wastewater (DWW). The results of this work indicated that C. vulgaris, effectively eliminated pollutants and improved the physicochemical characteristics of wastewater such as pH, DO, alkalinity. Simultaneously, it also decreased BOD, COD, suspended solids, heavy metals (HMs) such as iron (Fe), zinc (Zn), cadmium (Cd), mercury (Hg), copper (Cu), lead (Pb) and nutrient load (phosphate and nitrate) of DWW. Effective remediation of the pollutants was attained within 4h of C. vulgaris cultivation. The removal of toxic compounds such as 4-methoxy carbonyl benzo hydrazide, benzamine 4,4’ methylene bis, acetamide, and N-(2-methyl phenyl), was confirmed with GC-MS analysis. The removal of polysulfides and aliphatic bromo compounds was evident from the FTIR studies. Pearson’s correlation analysis showed a positive correlation between physicochemical variables and algal biomass. Hence, the current study recommends biological wastewater treatment,by utilizing C. vulgaris as an effective and eco-friendly option, for removing pollutants and restoring the physicochemical properties of water.

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“…2). The EC content of untreated DWW reported in the present study was in agreement with the observation of Moondra et al (2020).…”

Section: Properties Of Raw Domestic Wastewatersupporting

confidence: 93%

“…The increase in pH and DO was highly influential in the removal of nutrients, organic, and metals from DWW. The growth of microalgae increases the DO content of the growth medium (Moondra et al, 2021a(Moondra et al, , 2020.…”

Section: Properties Of Raw Domestic Wastewatermentioning

confidence: 99%

Phytoremediation of xenobiotics – A green approach for the treatment of domestic wastewater

Durairaj¹,

Rani²,

Jeyaraj³

et al. 2023

EEC

View full text Add to dashboard Cite

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“…In this study, the COD removal rate was 94.00±0.05%, the ammonia removal rate was 64.31±0.20%, the nitrate removal rate was 50.02±0.10%, the nitrite removal rate was 48.00±0.30%, and the phosphate removal rate was 42.05±0.10% using non-sterile domestic wastewater as an anolyte. Moondra et al (2020) used microalgae to remove nutrients from domestic wastewater. The maximum removal efficiency of phosphate, ammonia, and COD was 87.67%, 96.88%, and 80.39%, respectively.…”

Section: Wastewater Treatmentmentioning

confidence: 99%

The new report of domestic wastewater treatment and bioelectricity generation using Dieffenbachia seguine constructed wetland coupling microbial fuel cell (CW-MFC)

2023

Archives of Environmental Protection

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The constructed wetland integrated with microbial fuel cell (CW-MFC) has gained attention in wastewater treatment and electricity generation owing to its electricity generation and xenobiotic removal efficiencies. This study aims to use the CW-MFC with different macrophytes for domestic wastewater treatment and simultaneously electricity generation without chemical addition. The various macrophytes such as Crinum asiaticum, Canna indica, Hanguana malayana, Philodendron erubescens, and Dieffenbachia seguine were used as a cathodic biocatalyst. The electrochemical properties such as half-cell potential and power density were determined. For wastewater treatment, the chemical oxygen demand (COD) and other chemical compositions were measured. The results of electrochemical properties showed that the maximal half-cell potential was achieved from the macrophyte D. seguine. While the maximal power output of 5.42±0.17 mW/m 2 (7.75±0.24 mW/m 3 ) was gained from the CW-MFC with D. seguine cathode. Moreover, this CW-MFC was able to remove COD, ammonia, nitrate, nitrite, and phosphate of 94.00±0.05%, 64.31±0.20%, 50.02±0.10%, 48.00±0.30%, and 42.05±0.10% respectively. This study gained new knowledge about using CW-MFC planted with the macrophyte D. seguine for domestic wastewater treatment and generation of electrical power as a by-product without xenobiotic discharge.

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“…If not addressed properly, this process could lead to inefficient nutrient removal due to decreased algal activity and lower effluent quality [8,65,102]. Such dynamics of the three parameters-CO 2 , pH, and DO-occur in all algae-based wastewater treatment reactors [8,21,34,104]. Both the preferred pH level of the strain and the CO 2 concentration in the reactor should be synchronized, when this is possible, in order to achieve the most favorable conditions for the specifically used algal strain for the optimal removal of nutrients from the wastewater medium [8,102].…”

Section: Ph Variation Transfer Of Co 2 and O 2 Oversaturation Inhibitionmentioning

confidence: 99%

A Review on the Reliability and the Readiness Level of Microalgae-Based Nutrient Recovery Technologies for Secondary Treated Effluent in Municipal Wastewater Treatment Plants

Valchev

Ribarova

2022

Processes

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Algae-based wastewater treatment technologies are promising green technologies with huge economical potential and environmental co-benefits. However, despite the immense research, work, and achievement, no publications were found wherein these technologies have been successfully applied in an operational environment for nitrogen and phosphorus removal of secondary treated effluent in municipal wastewater treatment plants. Based on a literature review and targeted comprehensive analysis, the paper seeks to identify the main reasons for this. The reliability (considering inlet wastewater quality variations, operating conditions and process control, algae harvesting method, and produced biomass) as well as the technology readiness level for five types of reactors are discussed. The review shows that the reactors with a higher level of control over the technological parameters are more reliable but algal post-treatment harvesting and additional costs are barriers for their deployment. The least reliable systems continue to be attractive for research due to the non-complex operation and relieved expenditure costs. The rotating biofilm systems are currently undertaking serious development due to their promising features. Among the remaining research gaps and challenges for all the reactor types are the identification of the optimal algal strains, establishment of technological parameters, overcoming seasonal variations in the effluent’s quality, and biomass harvesting.

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Sustainable treatment of domestic wastewater through microalgae

Cited by 31 publications

References 26 publications

Phytoremediation of xenobiotics – A green approach for the treatment of domestic wastewater

Phytoremediation of xenobiotics – A green approach for the treatment of domestic wastewater

The new report of domestic wastewater treatment and bioelectricity generation using Dieffenbachia seguine constructed wetland coupling microbial fuel cell (CW-MFC)

A Review on the Reliability and the Readiness Level of Microalgae-Based Nutrient Recovery Technologies for Secondary Treated Effluent in Municipal Wastewater Treatment Plants

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