Dual Purpose System for Water Treatment From a Polluted River and the Production of Pistia stratiotes Biomass Within a Biorefinery

Abstract

The use of lagoons with floating aquatic plants for the treatment of a polluted urban river with recovery of Pistia stratiotes biomass was investigated. A first group of experiments was performed during spring, comparing three different media: synthetic wastewater (SWW), water from the Sordo River (WSR), and WSR amended with fertilizer (WSR + F). The second and third experiments were performed during summer and winter, respectively, using only WSR. During spring, the productivity in WSR and WSR + F was similar between them and significantly higher compared to the one observed in the SWW: 0.949 versus 0.379 g dry weight (dw) m−2 day−1, respectively. During summer, the productivity in the WSR was similar to the one observed in spring but significantly different to the one registered in winter: 0.946 versus 0.347 g dw m−2 day−1. During spring and summer, the uptake rate of ammonium nitrogen was significantly higher compared to the one registered for nitrate, although in winter there were no differences between such rates. For phosphates, the removal percentage was similar in spring and winter (96.25 and 99.1%, respectively). It was concluded that this system serves a dual purpose, treating water from a polluted river effectively and producing high biomass yield during spring and summer.

Floating Wetlands: A Sustainable Tool for Wastewater Treatment

“…[34,76] Although plants can partially degrade the organic compounds, nevertheless, complete degradation is indispensable without effective partnership with microorganisms. [76,77] The partnership can be neutral, commensal, and dormant. [75,[78][79][80] Plant roots are the primary site for bacteria to colonize plant tissue.…”

Biodiesel production from microalgae: progress and biotechnological prospects

“…Por otro lado, en los últimos años se ha conceptualizado el término "sistemas de doble propósito" para describir al conjunto de procesos encaminados en la reincorporación de nutrientes presentes en efluentes residuales en la producción de biomasa (Olguín, 2012;Robles-Pliego et al, 2015). La biomasa generada, de acuerdo con sus características, puede ser empleada para la obtención de productos de alto valor agregado y biocombustibles, principalmente, en el contexto de una biorrefinería.…”

A Closed Loop Wastewater Biorefinery Based on the Recently Introduced SHEFROL Reactor and Two Freely Available Macrophytes

“…[1][2][3] In comparison, attempts to use macrophytes as bioagents have been very few, and far between, confined to duckweed. [4][5][6][7] This is surprising as well as unfortunate, considering that macrophytes, especially the weedy species, possess several attributes that make them potentially more suitable as bioagents in wastewater DOI: 10.1002/clen.202100287 biorefineries than algae. Some of these attributes have been identified in a conceptual review by Nawaj-Alamet al, [8] and include, a) high growth rate; b) resilience and robustness; c) proven ability to phytoremediate a large variety of pollutants; d) capacity to provide a very wide range of chemicals; e) potential of use as feedstock in the making of fertilizers, paper pulp, alcohol, biodiesel, etc.…”