Bio-Product Recovery From Lignocellulosic Materials Derived From Poultry Manure

Champagne, Pascale; Li, Caijian

doi:10.1177/0270467607313955

Cited by 2 publications

(3 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Chemical methods dissolve lignin, hemicellulose, and/or cellulose crystalline structure using solvents. Acids, for example, speed up the solubilization and increase conversion yields [58][59][60].…”

Section: -High Protein Content (Around 20% Of the Dm) 3-low Energy Density Or Low Fiber Content (About 50% Of The Dm) 4-low Degradabilitymentioning

confidence: 99%

“…It removes lignin and hemicellulose partially and increases cellulose content in the anaerobically digested fiber. Alkali treatment uses dilute NaOH or KOH (2% to 4%) at temperatures (25-120 • C) for 1 to 48 h [23,32,58] to delignify cellulose in lignocellulosic biomass and increases its porosity [30,68]. This increases its internal surface area [58].…”

Section: Alkali Treatmentmentioning

confidence: 99%

“…Alkali treatment uses dilute NaOH or KOH (2% to 4%) at temperatures (25-120 • C) for 1 to 48 h [23,32,58] to delignify cellulose in lignocellulosic biomass and increases its porosity [30,68]. This increases its internal surface area [58]. Delignification is an important step in enhancing cellulosic fraction conversion in the anaerobically digested fibers into glucose [30].…”

Section: Alkali Treatmentmentioning

confidence: 99%

See 2 more Smart Citations

Chemical Methods for Hydrolyzing Dairy Manure Fiber: A Concise Review

2021

View full text Add to dashboard Cite

This paper reviews the chemical hydrolysis processes of dairy manure fiber to make its sugar accessible to microorganisms during anaerobic digestion and identifies obstacles and opportunities. Researchers, so far, investigated acid, alkali, sulfite, and advanced oxidation processes (such as hydrogen peroxide assisted by microwave/ultrasound irradiation, conventional boiling, and wet oxidation), or their combinations. Generally, dilute acid (3–10%) is less effective than concentrated acid (12.5–75%), which decrystallizes the cellulose. Excessive alkaline may produce difficult-to-degrade oxycellulose. Therefore, multi-step acid hydrolysis (without alkaline) is preferred. Such processes yielded 84% and 80% manure-to-glucose and -xylose conversion, respectively. Acid pretreatment increases lignin concentration in the treated manure and hinders subsequent enzymatic processes but is compatible with fungal cellulolytic enzymes which favor low pH. Manure high alkalinity affects dilute acid pretreatment and lowers glucose yield. Accordingly, the ratio of manure to the chemical agent and its initial concentration, reaction temperature and duration, and manure fineness need optimization because they affect the hydrolysis rate. Optimizing these factors or combining processes should balance removing hemicellulose and/or lignin and increasing cellulose concentrations while not hindering any subsequent process. The reviewed methods are neither economical nor integratable with the on-farm anaerobic digestion. Economic analysis and energy balance should be monolithic components of the research. More research is required to assess the effects of nitrogen content on these processes, optimize it, and determine if another pretreatment is necessary.

show abstract

Section: -High Protein Content (Around 20% Of the Dm) 3-low Energy Density Or Low Fiber Content (About 50% Of The Dm) 4-low Degradabilitymentioning

confidence: 99%