Alkaline Hydrogen Peroxide Pretreatment of Cladodes of Cactus (Opuntia Ficus-Indica) for Biogas Production

AbstractIn this study, the influence of alkaline hydrogen peroxide (H2O2) pretreatment of the three different plant sources: Miscanthus giganteus, Sorghum Moench, and Sida hermaphrodita, for biogas production was investigated. The influence of temperature, reaction time, and H2O2 concentration on the efficiency of biomass degradation and on the further methanogenic fermentation were studied. The results obtained after chemical pretreatment indicate that using H2O2 at alkaline conditions leads to the decomposition of three major structures: lignin, hemicellulose, and cellulose. The best results were achieved for the process performed at 25°C for 24 h with the use of a 5 mass % H2O2 solution. Although the degradation level was very high for all three plant sources, the biogas production from the energy crops pretreated chemically was strongly inhibited by byproducts and the residual oxygen formed after H2O2 decomposition. This fact indicates that alkaline H2O2 pretreatment is a very promising method for plant material degradation for further biogas production, but pretreated biomass must be separated from supernatant before the fermentation process because of the high concentration of inhibitors in the hydrolysates. The best results were obtained for Sida with biogas and methane production of 2.29 Ndm3 and 1.06 Ndm3, respectively.

Download Full-text

The behavior of chromophoric structures in softwood mechanical pulp on bleaching with alkaline hydrogen peroxide

Nordic Pulp & Paper Research Journal ◽

10.3183/npprj-2006-21-03-p359-364 ◽

2006 ◽

Vol 21 (3) ◽

pp. 359-364 ◽

Cited By ~ 4

Author(s):

Eva Svensson Rundlöf ◽

Eric Zhang ◽

Liming Zhang ◽

Göran Gellerstedt

Keyword(s):

Hydrogen Peroxide ◽

Alkaline Hydrogen Peroxide ◽

Mechanical Pulp

Download Full-text

Carbocation scavenger assisted acid pretreatment followed by mild alkaline hydrogen peroxide (AHP) treatment for efficient production of fermentable sugars and lignin adsorbents from hardwood biomass

Industrial Crops and Products ◽

10.1016/j.indcrop.2021.113737 ◽

2021 ◽

Vol 170 ◽

pp. 113737

Author(s):

Yang Huang ◽

Qiulu Chu ◽

Wenyao Tong ◽

Shufang Wu ◽

Yongcan Jin ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Fermentable Sugars ◽

Efficient Production ◽

Alkaline Hydrogen Peroxide ◽

Acid Pretreatment ◽

Carbocation Scavenger

Download Full-text

Features correlated to improved enzymatic digestibility of corn stover subjected to alkaline hydrogen peroxide pretreatment

Bioresource Technology ◽

10.1016/j.biortech.2021.124688 ◽

2021 ◽

Vol 325 ◽

pp. 124688

Author(s):

Li Yang ◽

Yue Ru ◽

Shuai Xu ◽

Tongjun Liu ◽

Liping Tan

Keyword(s):

Hydrogen Peroxide ◽

Corn Stover ◽

Alkaline Hydrogen Peroxide ◽

Enzymatic Digestibility

Download Full-text

Characterizing Wool Keratin

Research Letters in Materials Science ◽

10.1155/2009/147175 ◽

2009 ◽

Vol 2009 ◽

pp. 1-5 ◽

Cited By ~ 20

Author(s):

Jeanette M. Cardamone ◽

Alberto Nuñez ◽

Rafael A. Garcia ◽

Mila Aldema-Ramos

Keyword(s):

Hydrogen Peroxide ◽

Gel Electrophoresis ◽

Water Soluble ◽

Alkaline Solutions ◽

Biodegradable Material ◽

Alkaline Hydrogen Peroxide ◽

Cortical Cells ◽

Sds Page ◽

Fibrous Matrices ◽

Wool Keratin

Keratin from wool is a reactive, biocompatible, and biodegradable material. As the biological structural component of skin (soft keratins) and of nails, claws, hair, horn, feathers, and scales (hard keratins) pure keratin comprises up to 90% by weight of wool. Wool was treated in alkaline solutions to extract from 68% to 82% keratin within 2 to 5 hours of exposure at . The keratin products were water-soluble and were confirmed to contain intermediate filament and microfibrillar component-proteins of fractured, residual cuticle, and cortical cells. Oxidation of wool by peroxycarboximidic acid in alkaline hydrogen peroxide produced keratin products with distinct microcrystalline structures: descaled fibers, fibrous matrices, and lyophilized powders. Morphology and confirmation of peptide functionality were documented by SEM, Amino Acid Analysis, SDS-PAGE gel electrophoresis, MALDI-TOF/TOF, and FTIR analyses. The reactivity of keratin from wool models the reactivity of keratin from low-value sources such as cattle hair.

Download Full-text