Abstract: The present invention is related to an anaerobic photobioreactor and a method for active biomass cultivation, wastewater treatment, nutrients recovery, energy production and high-value products synthesis. Phototrophic bacteria are cultured in the anaerobic photobioreactor lighted with solar or artificial irradiation where certain light wavelengths are selectively discarded with a light selector installed on the top of the photobioreactor. In this light-based process wastewater treatment and resources recovery, like nutrients and high-value bioproducts (fertilizers, polymers and proteins) present in wastewater are performed simultaneously. Cultured biomass is treated by anaerobic digestion for biofuel production, including optative hydrolytic pre-treatment, and/or valuable bioproducts can be obtained in a downstream process.

Abstract: An electronic commerce method and system for selecting products and creating purchase orders via computer network. The system consists of at least one user operated client computer, and a merchant operated server computer system that processes requests from the client, creates purchase orders, and manages multiple web browser windows within the client. The system features four web browser windows representing four basic functions performed repeatedly and iteratively in purchasing products: “catalog window”, “product window”, “information window”, and “order window”. The system further provides a method to control which window the server output is displayed in to maintain system integrity. The system and method enables the user to switch from one window to another to access any one of the purchasing functions in a single action.