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Optimizing Phosphoric Acid plus Hydrogen Peroxide (PHP) Pretreatment on Wheat Straw by Response Surface Method for
Jingwen Qiu1, Qing Wang1, Fei Shen2
1Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, 211 Huimin Road, Wenjiang District, Chengdu, Sichuan, 611130, People's Republic of China.
Applied Biochemistry and Biotechnology
|October 13, 2016
Summary
Optimizing wheat straw pretreatment with phosphoric acid plus hydrogen peroxide (PHP) enhances glucose yield. The study found ideal conditions to maximize sugar production while minimizing chemical use for biofuel applications.
Area of Science:
- Biomass Pretreatment
- Biochemical Engineering
- Renewable Energy
Background:
- Wheat straw is an abundant lignocellulosic biomass resource.
- Efficient pretreatment is crucial for converting wheat straw into biofuels.
- Phosphoric acid plus hydrogen peroxide (PHP) is a promising pretreatment method.
Purpose of the Study:
- To optimize the phosphoric acid plus hydrogen peroxide (PHP) pretreatment of wheat straw.
- To investigate the effects of temperature, time, and chemical proportions on pretreatment efficiency.
- To maximize glucose yield from enzymatic hydrolysis while minimizing chemical input.
Main Methods:
- Response surface methodology was employed to study the effects of key variables.
- Wheat straw was pretreated using varying temperatures, times, and phosphoric acid/hydrogen peroxide concentrations.
- Enzymatic hydrolysis was performed on pretreated samples to determine glucose yield.
Main Results:
- Hemicellulose and lignin removal increased with higher temperatures, longer times, and greater H3PO4 proportions.
- Cellulose recovery was negatively impacted by increased temperature, time, and H3PO4 proportion.
- Optimized conditions (40°C, 2.0 h, 70.2% H3PO4, 5.2% H2O2) yielded 299 mg glucose/g wheat straw.
Conclusions:
- PHP pretreatment effectively removes lignin and hemicellulose from wheat straw.
- Optimized PHP pretreatment balances biomass degradation with cellulose recovery for high glucose yields.
- The study provides optimal conditions for efficient enzymatic hydrolysis of wheat straw for biofuel production.
