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Co-pyrolysis of cassava peel with synthetic polymers:thermal and kinetic behaviors

Waste Disposal and Sustainable Energy 2021年第4期3卷 289-298页

作者： B.S.Adeboye B.Z.Adewole A.M.Adedoja S.O.Obayopo S.A.Mamuru M.O.Idris I.K.Okediran A.A.Asere Department of Mechanical Engineering Osun State UniversityOsogboOsun 210001Nigeria Department of Mechanical Engineering Obafemi Awolowo UniversityIle-IfeOsunNigeria Department of Pure and Applied Chemistry Adamawa State UniversityMubiAdamawaNigeria

This research effort focuses on the co-pyrolysis of cassava peels waste and some synthetic polymers towards energy conversion and reducing the volume of these waste fractions dumped on *** co-pyrolysis behavior and pyrolysis kinetics of various synthetic polymer wastes/cassava peel blends were investigated by blending cassava peel waste with low-density polyethylene(LDPE),polyethylene terephthalate(PET),and polystyrene(PS)at different weight *** physical characteristics of each sample were investigated and the co-pyrolysis experiments were conducted at a heating rate of 10℃/min from room temperature to 800℃in N_(2)atmosphere in a thermogravimetric *** to thermal decomposition,kinetic analysis was done using the thermogravimetric *** from physicochemical characterization showed that cassava peel has a relatively lower calorific value of 15.92 MJ/kg compared with polystyrene(41.1 MJ/kg),low-density polyethylene(42.6 MJ/kg),and polyethylene terephthalate(21.1 MJ/kg).The thermal decomposition behavior of cassava peel was seen to be significantly different from those of the synthetic *** decomposition of the biomass material such as cassava peel generally occurs in two stages while the decomposition of LDPE,PS,and PET occurred in a single *** activation energy required for thermal degradation in cassava peel was also found to be lower to that of the plastic *** co-pyrolysis of cassava peel and different synthetic polymers affected the thermal and kinetic behaviors of the blends,reduce the activation energy and residue after pyrolysis.

关键词： Co-pyrolysis cassava peel Synthetic Polymer Kinetic Thermal

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Production of Lipase Using cassava peel and Sunflower Oil in Solid-State Fermentation： Preliminary Study

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Journal of Agricultural Science and Technology(A) 2013年第12期3卷 948-954页

作者： Caroline Branco Gerber Francieli Kaufmann Gabrieli Nicoletti Marilia Dalla Costa Aniela PintoKempka Volunteer Scholarship Holder of the Scientific Initiation Food Engineering Department State University of Santa CatarinaPinhalzinho 89870-000 Santa Catarina Brazil Food Engineering Department State University of Santa Catarina Pinhalzinho 89870-000 Santa Catarina Brazil

Full use of residues from industrial processes is a fundamental necessity of contemporary society, since it avoids impacts to the environment by using residues as inputs for other products of high economic and social importance. In this study, lipase production of the crude enzymatic extracts obtained by Aspergillus niger using cassava peel as substrate and sunflower oil as an inductor was investigated. The optimized cultivation temperature and concentration of inductor were determined using the response surface methodology. The two variables studied exercised influence in the production of lipase in the 95% level of confidence. The response surface obtained indicated that the conditions that maximize lipase activity production were 30.5 ~C and initial concentration of sunflower oil was 2.5% （w/w）. Through this analysis, it is evident that extremes in temperature and concentration of inductor tend to decrease lipase production, since low temperatures decrease metabolism and high temperatures may inactivate the lipase. Optimum lipase yield was 59.8 U/g of dry peel which was fermented for 60 h. Lipase production presents a peak of 61.3 U/g, at 72 h of fermentation. However, this value is statistically equal （p 〉 0.05） of the value of lipase activity obtained for 60 h and 84 h of fermentation.

关键词： cassava peel lipase production solid-state fermentation sunflower oil.

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The Potential Use of cassava peel for Treatment of Mine Water in Mozambique

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Journal of Environmental Protection 2017年第3期8卷 277-289页

作者： Estevao A.Jr.Pondja Kenneth M.Persson Nelson P.Matsinhe Department of Building&Environmental Technology Lund UniversityLundSweden Department of Civil Engineering Eduardo Mondlane UniversityMaputoMozambique

In the last decade, Mozambique became one of the top coal producers in Africa. The coal mines are in Moatize district in the center of the country, inside the lower Zambezi river basin. Pollution due to mining activities has negative impacts in agriculture, fishing, water supply, and presents risks to public health. Mozambique is one of the largest cassava producers in the world. More than 1.5 million tons of cassava peel are generated in the country and this agro-waste is discarded. The aim of this study is to discuss the possibility of using cassava peel to treat mine water. cassava peel can be used as carbon sources for sulfate reducing bacteria in bioremediation, as an adsorbent and as a filter medium. An integrated method is proposed for treatment of mine water in Moatize. It was suggested that applying cassava peel generated in developing countries for treatment of mine water could be a good solution to protect the environment against mining pollution.

关键词： cassava peel Bioremediation Adsorption Filtration Mine Water

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Synthesis and characterization of starch nanoparticles from cassava Pee

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Journal of Bioresources and Bioproducts 2018年第4期3卷 155-159页

作者： Selvaraju Sivamani Karuppasamy Archana RamuSanthosh Natesan Sivarajasekar Naveen Prasad B S Chemical Engineering Laboratory Department of BiotechnologyKumaraguru College of TechnologyCoimbatoreIndia Chemical Engineering Section Engineering DepartmentSalalah College of TechnologySalalahSultanate of Oman

Starch nanoparticles are used as a matrix with natural rubber for tire making, alternative adsorbents for wastewater treatment, drug carriers, packaging materials, emulsion stabilizers and fat replacers. The objective of this study is to prepare the starch nanoparticles from cassava peel by mineral acid hydrolysis using hydrochloric and sulfuric acids and perform the characterization of starch nanoparticles with Fourier transform infrared (FTIR),X-ray diffraction (XRD) and scanning electron microscope (SEM)It was found that the obtained yield of starch nanoparticles by H2SO4was higher than that by HCl.

关键词： cassava peel Starch nanoparticles Acid hydrolysis FTIR XRD

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