Use of Biochar to Improve Biomethanization in Anaerobic Co-Digestion

Mendoza, L.; Gonzalez, Yeraldin; Ortiz, Erick; Ramirez, Marian; Deago, Euclides; James, Arthur

doi:10.1109/iestec54539.2022.00093

Cited by 1 publication

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“…The study of anaerobic digestion in Panama is something new and has been carried out for a few years [11][12][13]. This has been the product of a reorganization of sanitary sewage with the construction of sanitary networks, collector lines, the Juan Diaz Wastewater Treatment Plant (WWTP), and the implementation of the Panama Bay Sanitation Program.…”

Section: Introductionmentioning

confidence: 99%

Optimizing Anaerobic Digestion at Ambient Temperatures: Energy Efficiency and Cost Reduction Potential in Panama

Deago,

Ramírez,

Espino

et al. 2023

Water

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Anaerobic digestion (AD) is usually carried out at mesophilic temperatures (25–45 °C) in most countries, whether in temperate or tropical climates, which results in the need for heat injection and consequently increases costs. In this regard, batch AD tests were conducted at 25, 28, and 35 °C, with 25 °C being the lowest ambient temperature in Panama, using thickened secondary sludge (TSS) and digested secondary sludge (DSS) from the Juan Diaz wastewater treatment plant (WWTP) to determine the Biochemical Methane Potential (BMP). The AD study generated maximum mean BMP values of 163 mL CH4/g VS for DSS and 289.72 mL CH4/g VS for codigestion at 25 °C. The BMP value of DSS at 25 °C showed that it can still be used for energy generation, using the lowest ambient temperature recorded in Panama City. Likewise, trials at 25 °C showed a 43.48% reduction in the electrical energy produced compared to that generated at 38 °C in WWTP. This results in a reduction in energy, as the use of heat could be omitted and the energy costs required for the process are covered. In this regard, the novelty of this work lies in its investigation of anaerobic digestion at ambient temperatures, which represents a departure from conventional practices that typically require higher temperatures. By exploring the feasibility of anaerobic digestion within the temperature range of 25–35 °C, this study offers a novel approach to optimizing energy efficiency and reducing costs associated with elevated temperatures.

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Section: Introductionmentioning

confidence: 99%