Commercial asparaginase is produced from Aspergillus oryzae based on cloning technology. This enzyme has an optimum pH of 6e7. Good enzymatic activity is obtained between the 5e8 pH range. The 5e8 pH range may be suitable for the production of potato-based products (French fries and chips). By reusing the enzyme immersion solutions the costs for the enzyme can be reduced and the added protein content to the final product will be kept low and thus will not affect the overall quality of the process wastewater