scholarly journals Oxidation of Palm Oil Mill Effluent Using Hydrogen Peroxide and Catalysed by UV Light/Zinc Oxide

Author(s):  
Augustine Chioma Affam ◽  
Abdul Rahman Bin Bistar
2019 ◽  
Vol 31 (2) ◽  
pp. 330-347 ◽  
Author(s):  
Anwar Ahmad ◽  
Sajjala Sreedhar Reddy

In this study, zinc oxide nanoparticles immobilized by methylenebisacrylamide were used for anaerobic consortium application and were examined for biomass retention capacity characterized in terms of volatile solids and specific methanogenic activity. The upflow anaerobic sludge blanket reactor was operated at various hydraulic retention times and was fed with palm oil mill effluent as a carbon source. The highest methane production rate of 510 mL CH4·L−1·h−1 with a methane yield of 68.3 L CH4 g−1·CODadded was obtained at palm oil mill effluent concentration of 20 g COD·L-1 and 24 h of hydraulic retention time. The average biogas (4.5 L) showed methane content and chemical oxygen demand reduction of 84.5 and 95.7%, respectively. Rmax was 570 mL L−1·POME·h−1 at 15% of zinc oxide nanoparticles, with butyrate and acetic acid in an effluent contained when operated at a hydraulic retention time of 24 h and a palm oil mill effluent concentration of 20 g COD L−1. A CO2 reduction of 93.6% was obtained at 15% w/v loading of zinc oxide nanoparticle. Experiments demonstrated that with the granule bead size of immobilized zinc oxide nanoparticle of 3.99 mm, production of CH4 and sequester of CO2 were 650 m3·d−1 and 456 m3·d−1, respectively. At 15% zinc oxide nanoparticle, granule leakage was found to be 0.065 mg·L−1. It is significant that this is the first report on immobilized zinc oxide nanoparticle granule biomass for biogas production from wastewater.


2016 ◽  
Vol 74 (11) ◽  
pp. 2675-2682 ◽  
Author(s):  
Chia Ken Lin ◽  
Mohammed J. K. Bashir ◽  
Salem S. Abu Amr ◽  
Lan Ching Sim

The aim of the current study is to evaluate the effectiveness of combined persulphate with hydrogen peroxide (S2O82−/H2O2) oxidation as a post-treatment of biologically treated palm oil mill effluent (POME) for the first time in the literature. The removal efficiencies of chemical oxygen demand (COD), ammoniacal nitrogen (NH3-N), and suspended solids (SS) were 36.8%, 47.6%, and 90.6%, respectively, by S2O82− oxidation alone under certain operation conditions (i.e., S2O82− = 0.82 g, pH 11, and contact time 20 min). Nevertheless, the combined process (S2O82−/H2O2) achieved 75.8% and 87.1% removals of NH3-N and SS, respectively, under 2.45/1.63 g/g H2O2/S2O82−, pH 11, and 20 min oxidation. Moreover, 56.9% of COD was removed at pH 8.4.


2020 ◽  
Vol 8 (2) ◽  
pp. 103551 ◽  
Author(s):  
B.K. Zaied ◽  
Mohd Nasrullah ◽  
Md. Nurul Islam Siddique ◽  
A.W. Zularisam ◽  
Lakhveer Singh ◽  
...  

2017 ◽  
Vol 17 ◽  
pp. 7-10 ◽  
Author(s):  
Mohd Nasrullah ◽  
Lakhveer Singh ◽  
Zahari Mohamad ◽  
Siti Norsita ◽  
Santhana Krishnan ◽  
...  

2021 ◽  
Vol 13 (2) ◽  
pp. 796
Author(s):  
You-Kang Phang ◽  
Mohammod Aminuzzaman ◽  
Md. Akhtaruzzaman ◽  
Ghulam Muhammad ◽  
Sayaka Ogawa ◽  
...  

In recent years, the green chemistry based-approach for the synthesis of nanoparticles has shown tremendous promise as an alternative to the costly and environmentally unfriendly chemically synthesized nanoparticles. In this study, copper oxide nanoparticles (CuO NPs) were synthesized through a green approach using the water extract of papaya (Carica papaya L.) peel biowaste as reducing as well as stabilizing agents, and copper (II) nitrate trihydrate salt as a precursor. The structural properties, crystallinity, purity, morphology, and the chemical composition of as-synthesized CuO NPs were analyzed using different analytical methods. The analytical results revealed that the synthesized CuO was observed as spherical-like in particles with measured sizes ranging from 85–140 nm and has monoclinic crystalline phase with good purity. The Fourier transform infrared (FTIR) spectroscopic results confirmed the formation of the Cu-O bond through the involvement of the potential functional groups of biomolecules in papaya peel extract. Regarding photocatalytic activity, the green-synthesized CuO NPs were employed as a photocatalyst for the degradation of palm oil mill effluent (POME) beneath the ultraviolet (UV) light and results showed 66% degradation of the POME was achieved after 3 h exposure to UV irradiation. The phytotoxicity experiment using mung bean (Vigna radiata L.) seed also showed a reduction of toxicity after photodegradation.


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