Valorization of potato peels and eggshells wastes: Ca-biocomposite to remove and recover phosphorus from domestic wastewater

Astrid Quisperima, Sebastián Pérez, Elizabeth Flórez, Nancy Acelas

Research output: Contribution to journalArticlepeer-review

Abstract

Potato peel (PP) waste are generated in huge quantities, causing environmental pollution and health problems. Therefore, obtaining value-added products from PP is a current research challenge. In this work, novel Ca-biocomposites for phosphorus (P) removal were prepared by pyrolysis (500–800 °C) using eggshell (ES) and PP (ES/PP = 1:2 ratio by weight). ESPP-700 (pyrolyzed at 700 °C), reached a Qmax of 174.8 mg P/g, while the application of Ca-biocomposites in domestic wastewater showed 85.96% of P removal. According to the pseudo-second-order kinetic model, P adsorption was dominated by chemisorption, follows by apatite precipitation. The P solubility (62.5 wt.%) in formic acid (2.0 wt.%) and the water-soluble P (3.2 wt.%) for ESPP-700 after P adsorption, indicated that the final product would work as fertilizer for acidic soils. This is an important step in the management of agricultural wastes to implement the 3R slogan “Reduce, Reuse, Recycle” towards a circular economy.

Original languageEnglish
Article number126106
JournalBioresource Technology
Volume343
DOIs
StatePublished - Jan 2022

Keywords

  • Adsorbent
  • Biocomposite
  • Eggshell
  • Phosphorus
  • Potato peel

Product types of Colciencias

  • A1 article - Q1

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