Enhancement of anaerobic digestion efficiency of wastewater sludge and olive waste: Synergistic effect of co-digestion and ultrasonic/microwave sludge pre-treatment

Waste Management
B Aylin AlagözAyşen Erdinçler

Abstract

This study investigates the effect of ultrasonic and microwave pre-treatment on biogas production from the anaerobic co-digestion of olive pomace and wastewater sludges. It was found that co-digestion of wastewater sludge with olive pomace yielded around 0.21L CH4/g VSadded, whereas the maximum methane yields from the mono-digestion of olive pomace and un-pretreated wastewater sludges were 0.18 and 0.16L CH4/g VSadded. In the same way, compared to mono-digestion of these substrates, co-digestion increased methane production by 17-31%. The microwave and ultrasonic pre-treatments applied to sludge samples prior to co-digestion process led to further increase in the methane production by 52% and 24%, respectively, compared to co-digestion with un-pretreated wastewater sludge. The highest biogas and methane yields were obtained from the co-digestion of 30min microwave pre-treated wastewater sludges and olive pomace to be 0.46L/g VSadded and 0.32L CH4/g VSadded, respectively.

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Citations

Aug 16, 2016·Waste Management·Frantseska-Maria PelleraEvangelos Gidarakos
May 22, 2019·Environmental Science and Pollution Research International·Ece Özön, Ayşen Erdinçler
Feb 18, 2020·Chemosphere·Jianlei GaoQikun Wang
Nov 15, 2020·Applied Biochemistry and Biotechnology·Antonio SerranoMaría de Los Ángeles Martín
Apr 29, 2021·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Rita FragosoElizabeth Duarte
Jun 13, 2017·Bioresource Technology·Sanmooga Savoo, Ackmez Mudhoo
Sep 28, 2017·Ultrasonics Sonochemistry·Zumar M A Bundhoo, Romeela Mohee

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