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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Hydraulic and organic rates applied to pilot scale UASB reactor for sugar cane vinasse degradation and biogas generation

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Del Nery, Valeria [1] ; Alves, Inae [1] ; Rissato Zamariolli Damianovic, Marcia Helena [1] ; Pires, Eduardo Cleto [1]
Total Authors: 4
[1] Univ Sao Paulo, EESC, Dept Hydraul & Sanitat, Av Trabalhador Sao Carlense 400, BR-13566590 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: BIOMASS & BIOENERGY; v. 119, p. 411-417, DEC 2018.
Web of Science Citations: 4

A pilot-scale upflow anaerobic sludge blanket (UASB) reactor (120 L) was operated for biogas production by vinasse degradation. The reactor was operated for 700 days using a recirculation rate of 1:3 with organic loading rates (OLR) ranging from 0.5 to 32.4 kgCOD.m(-3).d(-1), upflow velocities ranged from 0.008 to 0.292 m h(-1) (feed added with recirculation) and the hydraulic retention time ranged from 33.33 to 0.86 days. The reactor demonstrated a stable performance at OLR at all applied loads. The COD removal efficiencies throughout the experiment were 87.5 +/- 5.3 and 90.5 +/- 3.6% for raw and soluble COD, respectively. Total volatile acids ranged from 59 mg L-1 to 585 mg L-1. The concentration of acetic and propionic acids at the reactor effluent reached 28 mg L-1 on OLR 20 kgCOD.m(-3).d(-1). The methane content in the biogas was 68.8 +/- 7.14%.The methane yield of 0.299 +/- 0.066 LCH4.g(-1)COD corresponds to about 76.4% of the theoretical methane yield. The methane productivity reached the highest value of 8.059 LCH4.L-1.d(-1) at 32.27 kgCOD.m(-3).d(-1)., corresponding to 83.9% of the theoretical value (9.611 LCH4.L-1.d(-1)). This result is very promising for power generation in the sugar and ethanol industry, complementing the energy balance of sugarcane, as shown by an energy balance evaluation. (AU)

FAPESP's process: 13/17591-1 - Biogas production by sugar cane vinasse anaerobic digradation: investigation of hydraulic and organic rates applied to the up flow anaerobic sludge blanket reactor for process optimization
Grantee:Eduardo Cleto Pires
Support type: Program for Research on Bioenergy (BIOEN) - Regular Program Grants