Effects of organic loading, influent concentration, and feed time on biohydrogen production in a mechanically stirred AnSBBR treating sucrose-based wastewater
Abstract
An anaerobic sequencing batch biofilm reactor (AnSBBR - total volume 7.5 L; liquid volume 3.6 L; treated volume per cycle 1.5 L) treated sucrose-based wastewater to produce biohydrogen (at 30 C). Different applied volumetric organic loads (AVOL of 9.0, 12.0, 13.5, 18.0, and 27.0 kg COD m-3 day-1), which were varied according to the influent concentration (3,600 and 5,400 mg COD L-1) and cycle length (4, 3, and 2 h), have been used to assess the following parameters: productivity and yield of biohydrogen per applied and removed load, reactor stability, and efficiency. The removed organic matter (COD) remained stable and close to 18 % and carbohydrates (sucrose) uptake rate remained between 83 and 97 % during operation. The decrease in removal performance of the reactor with increasing AVOL, by increasing the influent concentration (at constant cycle length) and decreasing the cycle lengths (at constant influent concentrations), resulted in lower conversion efficiencies. Under all conditions, when organic load increased there was a predominance of acetic, propionic, and butyric acid as well as ethanol. The highest concentration of biohydrogen in the biogas (24-25 %) was achieved at conditions with AVOL of 12.0 and 13.5 kg COD m-3 day -1, the highest daily production rate (0.139 mol H2 day-1) was achieved at AVOL of 18.0 kg COD m-3 day -1, and the highest production yields per removed and applied load were 2.83 and 3.04 mol H2 kg SUC-1, respectively, at AVOL of 13.5 kg COD m-3 day-1. The results indicated that the best productivity tends to occur at higher organic loads, as this parameter involves the "biochemical generation" of biogas, and the best yield tends to occur at lower and/or intermediate organic loads, as this parameter involves "biochemical consumption" of the substrate. © 2013 Springer Science+Business Media New York.
- Agitation
- AnSBBR
- Biohydrogen
- Cycle length
- Influent concentration
- Organic loading
- Anaerobiosis
- Biofilms
- Bioreactors
- Hydrogen
- Mechanical Processes
- Organic Chemicals
- Sucrose
- Time Factors
- Waste Water
- Biogas
- Hydrogen production
- Productivity
- Sugar (sucrose)
- Wastewater treatment
- acetic acid
- acetone
- alcohol
- bicarbonate
- biogas
- butanol
- butyric acid
- carbohydrate
- carbon
- chloride
- dibasic potassium phosphate
- disodium hydrogen phosphate
- falcium chloride
- felenium dioxide
- ferric chloride
- ferrous sulfate
- fobalt chloride
- fonobasic potassium phosphate
- hydrochloric acid
- hydrogen
- isobutyric acid
- methanol
- nickel sulfate
- nitrogen
- organic matter
- oxide
- potassium dihydrogen phosphate
- propionic acid
- sucrose
- unclassified drug
- urea
- Bio-hydrogen
- Influent concentrations
- Organic loadings
- alkalinity
- article
- biodegradation
- biofilm reactor
- biomass
- biomass production
- biomass support
- chemical industry
- chemical oxygen demand
- effluent
- flow rate
- immobilization
- impeller
- inoculation
- liquid culture
- physical chemistry
- productivity
- reactor monitoring
- reactor operation
- residual volume
- sequencing batch reactor
- sludge
- sludge blanket reactor
- solid waste
- stirred reactor
- temperature
- ultraviolet radiation
- vegetable
- vinasse
- waste water management
- Loading
URI
https://www.scopus.com/inward/record.uri?eid=2-s2.0-84890552417&doi=10.1007%2fs12010-013-0457-y&partnerID=40&md5=5b47dbde86854d629254c411982d69c2https://repositorio.maua.br/handle/MAUA/1249
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