Banca de QUALIFICAÇÃO: YURI MARINHO FERREIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : YURI MARINHO FERREIRA
DATE: 25/07/2024
TIME: 14:00
LOCAL: Google Meet
TITLE:

NUTRIENT RECOVERY FROM WASTEWATER USING BIOCHAR DERIVED FROM SPENT MUSHROOM SUBSTRATES

KEY WORDS:

Nitrogen, phosphorus, adsorption, cycling, circular economy.

PAGES: 32
BIG AREA: Ciências Agrárias
AREA: Engenharia Agrícola
SUMMARY:

Conventional wastewater treatment technologies generally do not satisfactorily remove nutrients such as nitrogen and phosphorus, whose discharge into water bodies causes eutrophication but, if properly removed, can be applied in agriculture. Mushroom production uses substrates prepared from straws, bagasse, and sawdust, which act as lignocellulosic sources necessary for the metabolism of these fungi, but after depletion, they become residues of this cultivation. Biochar is the result of the pyrolysis of biomass of animal or plant origin in the absence of oxygen and generally possesses adsorptive properties and affinity for some pollutants, including nitrogen and phosphorus. In this context, biochar produced from mushroom production residues has aroused interest due to its potential as an adsorbent for nitrogen and phosphorus in aqueous solutions. Therefore, this study aims to evaluate the removal of nutrients from wastewater using biochar produced from mushroom production residues and its possible recovery through its post-use agricultural application as an adsorbent. For biochar production, the mushroom production residue will be oven-dried and pyrolyzed in a tubular reactor with controlled heating rates. Three pyrolysis temperatures (400°C, 500°C, and 600°C) will be evaluated to prepare biochar with and without prior treatment with magnesium chloride, resulting in six distinct types of biochar. All will be tested for their capacity to adsorb nitrogen and phosphorus from aqueous solutions in batch tests, where these solutions will be kept under agitation at 450 rpm and exposed to 20 g of biochar per liter of solution for 24 hours. After the exhaustion of the adsorptive capacity of the biochar samples, the condition that achieves the highest nitrogen and phosphorus removal efficiencies will be tested in corn growth assays to understand the feasibility of recovering these nutrients for agricultural application.

COMMITTEE MEMBERS:
Presidente - 1759225 - ALEXANDRE LIOI NASCENTES
Externa à Instituição - BARBARA COSTA PEREIRA - FIOCRUZ
Externa à Instituição - ROZILENI PIONT KOVSKY CALETTI - UFRRJ