Cellulase hydrolysis of unsorted MSW

Area of Science:

• Waste Management & Engineering
• Biotechnology
• Enzyme Technology

Background:

• Cellulase enzymes show potential for organic waste liquefaction.
• Municipal solid waste (MSW) presents complex challenges for enzymatic treatment.
• Optimizing enzyme hydrolysis in challenging waste streams is crucial for effective waste management.

Purpose of the Study:

• To optimize enzyme hydrolysis of thermally treated MSW using surfactant additives.
• To evaluate cellulase performance in MSW wastewater.
• To assess the impact of contaminants and chelating agents on cellulase activity.

Main Methods:

• Enzyme hydrolysis of thermally treated MSW with and without surfactant.
• Analysis of enzyme performance in MSW wastewater.
• Measurement of viscosity and particle size distribution.
• Assessment of cellulase stability and function in the presence of metal ions and EDTA.

Main Results:

• Surfactant addition did not affect hydrolysis efficiency, viscosity, or particle size distribution.
• MSW wastewater contains high levels of inhibitory metal ions (calcium, potassium, sodium, chloride).
• Cellulase enzymes demonstrated stability and functionality despite the presence of contaminants and EDTA.

Conclusions:

• Surfactants are ineffective for optimizing cellulase hydrolysis of thermally treated MSW.
• Cellulase enzymes are robust and can function effectively in the presence of MSW wastewater contaminants.
• Further research may explore alternative methods to mitigate metal ion inhibition for enhanced waste liquefaction.