Performance assessment of wastewater treatment plants with special reference to phenol removal

Salaudeen, Taofeek; Okoh, Omobola O.; Okoh, Anthony I.

doi:10.1007/s13762-018-1684-0

Cited by 5 publications

(5 citation statements)

References 20 publications

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“…WWTP-A uses activated sludge technology, while WWTP-B and WWTP-C use oxidation pond and biofilter technologies, respectively. The WWTP-A, WWTP-B and WWTP-C belong to Raymond Mhlaba, Nxuba, and Buffalo City Municipalities of the Province, respectively [44,45]. WWTP-A has a capacity of 2 mL/d for 80,000 people who engage mostly in farming.…”

Section: Study Area Descriptionmentioning

confidence: 99%

“…Grab samples of sludge (n = 3) were taken from each of the facilities into 2 L broad-mouth bottles from dehydrated activated sludge cake, being the final residue of the sewage treatment processes. Sludge samples from each sampling location were mixed as a composite in a stainless-steel bucket [45,47].…”

Section: Preparation Of Samplesmentioning

confidence: 99%

“…The three wastewater treatment plants selected in this study were chosen because of their pollution history, demonstrating a number of organic pollutants, and their influence on the receiving waterbodies. Prior studies in the plants include the determination of the physicochemical properties of the wastewater effluents [43,44], phenolic compounds in effluents and receiving waterbodies [45], phthalate esters in influents, effluents, and sludge samples [46] and organochlorine pesticides in their sewage sludge [47]. From the physiochemical quality parameters reported by Agoro et al [37], deterioration in the surface water quality was evident, especially with respect to the values of TDS, Temp, pH, DO, nitrate, nitrite, phosphate, faecal coliform, chloride, BOD, sulphate, ammonium ion, COD and alkalinity.…”

Section: Introductionmentioning

confidence: 99%

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Heavy Metals in Wastewater and Sewage Sludge from Selected Municipal Treatment Plants in Eastern Cape Province, South Africa

Agoro

Adeniji

Adefisoye

et al. 2020

Water

188

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This study assessed the distribution of five heavy metals (Cd, Pb, Cu, Zn, and Fe) across the various stages of treatment in three selected sewage treatment facilities and their receiving waterbodies in the Eastern Cape Province, South Africa. Aqueous and solid (sludge) samples were collected monthly from September 2015 to February 2016. Quantitation was achieved by atomic absorption spectrometry after necessary sample preparations. Concentrations of heavy metal cations in the sludge generally varied from <DL (below detection limit) to 1.17 mg kg−1, <DL to 0.14 mg kg−1, 27.588 to 69.789 mg kg−1, and <DL to 0.099 mg kg−1 for Cu, Cd, Fe and Pb; while Zn was below detection all through. Similarly, the levels of Cu, Cd, and Fe in the influents, effluents, upstream and downstream across the three plants ranged from <DL–6.588 mg L−1, <DL–0.636 mg L−1, <DL–0.878 mg L−1 and <DL–0.711 mg L−1, respectively; Zn and Pb were less than DL in all the matrices and study locations. All the contaminants were below hazardous levels in all the sludge and aqueous samples except Cd which was higher in effluents and surface waters across the board. Wastewater Treatment Plant (WWTP)-A exhibited better removal capacity for Fe (86.6%), compared to WWTP-B (34.7%) and WWTP-C (56.9%). However, the removal of Cu and Zn was very poor in all the treatment facilities studied. Carcinogenic and non-carcinogenic risks evaluated were sufficiently low. This suggests that the levels of contamination, even with respect to Cd, was minimal. Nevertheless, efforts should be made to keep the concentrations of these contaminants at levels safe for humans and aquatic organisms. Furthermore, the use of the effluents from these facilities for irrigation should be discouraged to prevent unnecessary build-up of metals in the soil and plants grown with such, as well as subsequent bioaccumulation and biomagnification in the food chain.

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Section: Study Area Descriptionmentioning

confidence: 99%

Section: Preparation Of Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Heavy Metals in Wastewater and Sewage Sludge from Selected Municipal Treatment Plants in Eastern Cape Province, South Africa

Agoro

Adeniji

Adefisoye

et al. 2020

Water

188

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“…The potential toxicity and negative impacts of phenolic compounds on the environment have been investigated in a large body of literature, suggesting that some of these compounds (particularly chlorophenols) are highly toxic, estrogenic and carcinogenic for some aquatic organisms (Ferreira Guedes and Leitão, 2012 ; Catherine et al, 2016 ). Additionally, phenolic compounds can inhibit microorganisms present in activated sludge, and therefore disrupt treatment performance in wastewater treatment facilities (Salaudeen et al, 2019 ).…”

Section: Disinfectants and Antiseptics And Their Mechanism Of Actionmentioning

confidence: 99%

“…Removal efficiencies of phenolic compounds from domestic wastewaters and agricultural runoffs ranged from 33 and 96%, with an average concentration of 5.3 μg/L in the final effluents (Salaudeen et al, 2019 ). There is contradictory information in the literature with regards to what is the mechanism for phenol degradation in wastewater, where one group claimed biotransformation (Zhong et al, 2010 ) whereas another study argued that the phenolic compounds are removed mainly through adsorption (Salaudeen et al, 2019 ). Although activated carbon is the most applied treatment for the removal of phenols it is also very expensive to use (Villegas et al, 2016 ).…”

Section: Occurrence Of Disinfectants and Antiseptics In Aquatic Envir...mentioning

confidence: 99%

The effect of disinfectants and antiseptics on co- and cross-selection of resistance to antibiotics in aquatic environments and wastewater treatment plants

et al. 2022

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The outbreak of the SARS-CoV-2 pandemic led to increased use of disinfectants and antiseptics (DAs), resulting in higher concentrations of these compounds in wastewaters, wastewater treatment plant (WWTP) effluents and receiving water bodies. Their constant presence in water bodies may lead to development and acquisition of resistance against the DAs. In addition, they may also promote antibiotic resistance (AR) due to cross- and co-selection of AR among bacteria that are exposed to the DAs, which is a highly important issue with regards to human and environmental health. This review addresses this issue and provides an overview of DAs structure together with their modes of action against microorganisms. Relevant examples of the most effective treatment techniques to increase the DAs removal efficiency from wastewater are discussed. Moreover, insight on the resistance mechanisms to DAs and the mechanism of DAs enhancement of cross- and co-selection of ARs are presented. Furthermore, this review discusses the impact of DAs on resistance against antibiotics, the occurrence of DAs in aquatic systems, and DA removal mechanisms in WWTPs, which in principle serve as the final barrier before releasing these compounds into the receiving environment. By recognition of important research gaps, research needs to determine the impact of the majority of DAs in WWTPs and the consequences of their presence and spread of antibiotic resistance were identified.

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Is on-site wastewater a significant source of phosphorus to coastal plain streams?

Humphrey

O’Driscoll

Iverson

et al. 2019

Int. J. Environ. Sci. Technol.

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Performance assessment of wastewater treatment plants with special reference to phenol removal

Cited by 5 publications

References 20 publications

Heavy Metals in Wastewater and Sewage Sludge from Selected Municipal Treatment Plants in Eastern Cape Province, South Africa

Heavy Metals in Wastewater and Sewage Sludge from Selected Municipal Treatment Plants in Eastern Cape Province, South Africa

The effect of disinfectants and antiseptics on co- and cross-selection of resistance to antibiotics in aquatic environments and wastewater treatment plants

Is on-site wastewater a significant source of phosphorus to coastal plain streams?

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