Crop biomass leaching for nutrient recycling in a CELSS

Area of Science:

• Biomass conversion
• Bioregenerative life support systems
• Environmental engineering

Background:

• Leaching is a key biomass conversion technique for resource minimization in Controlled Ecological Life Support Systems (CELSS).
• Understanding leaching kinetics is crucial for efficient resource recovery and waste management in closed-loop systems.

Purpose of the Study:

• To examine the leaching rates and total leachability of Triticum aestivum L. Yecora Rojo residue.
• To determine the impact of various parameters on biomass reduction and phosphate concentration in leachate.
• To develop simulation models for predicting phosphate leaching in different reactor configurations.

Main Methods:

• Batch testing of wheat residue (Triticum aestivum L.) with varying particle sizes, leaching times, temperatures, and agitation methods (sonication vs. mechanical).
• Measurement of total biomass reduction and phosphate concentration in the leachate.
• Experimental determination of phosphate rate constants for modeling.

Main Results:

• Leaching rates and total leachability are significantly influenced by particle size, leaching time, temperature, and agitation method.
• Phosphate concentration in leachate varied with tested parameters.
• Rate constants were determined for phosphate leaching from the biomass.

Conclusions:

• Leaching parameters can be optimized to enhance biomass conversion efficiency and resource recovery in CELSS.
• Simulation models provide insights into reactor design for effective phosphate leaching.
• This research supports sustainable resource management in advanced life support systems.