Discoloration test of a slaughterhouse effluent by adsorption on two adsorbents produced from sawdust of Khaya senegalensis and Pinus sp

Djonga, Weldi Gnowe; Noubissié, Eric; Noumi, Guy Bertrand

doi:10.1016/j.rineng.2019.100068

Cited by 15 publications

(8 citation statements)

References 7 publications

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“…Fungi mycelium cell walls are made up of chitin, which carries anionic charges that attract the cationic metal ions by electrostatic forces, resulting in adsorption of the metal onto the mycelium surface (Stamets 2005;Thomas et al 2009). Adsorption is a surface phenomenon unlike biosorption which requires intracellular uptake of metals (Djonga et al 2019). The maximum turbidity and COD removals were not statistically different at 2.36 mm particle size and 9 cm bed depth from their removals in other treatment combinations used.…”

Section: Resultsmentioning

confidence: 82%

“…Relatively high removal rates were recorded for mycelium-colonized sawdust, which, compared to uncolonized sawdust, reduced color (1.2 times better), turbidity (6.9), TDS (1.8), EC (2.2), BOD (1.5), COD (1.46), TN (1.3) and TP (1.01)see Tables 1 and 2. The results show that the fungal mycelium biomass in the sawdust contributed significantly to pollutant removal from the wastewater. Fungi are saprophytes and can degrade organic matter (Stamets 2005), which is reported as the major cause of color and turbidity in slaughterhouse wastewaters (Djonga et al 2019). Nitrogen and phosphorus are also major nutrients for fungi, and are the building blocks for proteins, nucleic acids, coenzymes and chitin (Thomas et al 2009).…”

Section: Resultsmentioning

confidence: 99%

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Removal of pollutants by mycelium colonized sawdust

Osarenotor

Essandoh

Aighewi

2021

Water Practice and Technology

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Slaughterhouses generate wastewater daily and often discharge it to the environment. Many lack wastewater treatment systems, due to such systems' typically high cost and technological demands. In this study slaughterhouse wastewater was filtered through columns of mycelium – Pleurotus ostreatus – grown on sawdust substrates of different particle sizes. The columns' pollutant removal efficiencies were evaluated for color, turbidity, total suspended solids, total dissolved solids, electrical conductivity, dissolved oxygen, biological oxygen demand (BOD), chemical oxygen demand, total nitrogen and total phosphorus. The best color (75%), BOD (88%) and total nitrogen (86%) removal efficiencies were recorded with 2.36 mm particle size and 9 cm depth. Electrical conductivity removal efficiency was best with 2.36 mm particle size but 3 cm bed depth. The study showed that particle size has a significant effect on physiochemical pollutant removal by mycelium-colonized sawdust systems.

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Section: Resultsmentioning

confidence: 82%

Section: Resultsmentioning

confidence: 99%

Removal of pollutants by mycelium colonized sawdust

Osarenotor

Essandoh

Aighewi

2021

Water Practice and Technology

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“…The microporosity of the different adsorbents was determined through the iodine index, according to the method used by Djonga et al [14]. In fact, 0.5 g of each dry adsorbent was mixed with 50 ml of an iodine solution (0.1 N) in a beaker.…”

Section: Microporosity Of Adsorbentsmentioning

confidence: 99%

“…The macroporosity of the various adsorbents was determined through the methylene blue index, according to the method used by Djonga et al [14]. Indeed, 0.2 g of each adsorbent was mixed in a beaker with 100 ml of a methylene blue solution at 20 mg/L.…”

Section: Macroporosity and Specific Surface Area Of Adsorbentsmentioning

confidence: 99%

“…These results show that the amount of MO adsorbed increases with mass, thus characterizing a positive influence of mass of the adsorbent on the elimination of MO. This makes sense because increasing the mass of the adsorbent in the medium, implies an increase in the binding sites available for MO adsorption [7,14]. However, this influence of mass of the adsorbent is not significant.…”

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Physico-chemical Study of the Adsorption of Methyl Orange from Water by Biosorbent and Activated Carbon Based on Peanut Shells

Yanne¹,

Noubissié²,

Benessoubo³

et al. 2021

JEECE

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The objective of this work is to study the elimination of Methyl Orange (MO) contained in wastewater, by adsorption on four different adsorbents, produced from peanut shells. To achieve this, the various adsorbents were first produced. The native biosorbent (BN) was obtained from drying, crushing and sieving the peanut shells. The activated biosorbent (BA) was obtained by chemical activation with ortho-phosphoric acid (H 3 PO 4 ) 10% BN. The activated carbons (CA1 and CA2) were obtained by pyrolysis at 650°C of BN and BA, respectively. The four products were characterized adsorbents and experiments to determine the effects of pH, contact time, of their masses and the concentration of methyl orange in its removal by adsorption was carried out. The results show that the thermal activation of the BN has multiplied its surface area by 11, while chemical activation has multiplied by its specific surface 8. Both treatment (chemical and thermal) have also tripled the micropores of BN. All four adsorbents have a maximum adsorption capacity at pH6. At this pH, the amount of MO adsorbed decreases with increase in its concentration, regardless of the adsorbent used. Likewise, adsorption equilibrium is reached at 3 min on the four adsorbents. The pseudo second order model describes the adsorption kinetics of MO on the four adsorbents. Ultimately, CA1 is found to be the most effective in removing MO from wastewater.

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