Evaluation of startup and operation of four anaerobic processes treating a synthetic meat waste

Journal Article · Sat Mar 01 04:00:00 EST 1986 · Biotechnol. Bioeng.; (United States)

DOI:https://doi.org/10.1002/bit.260280310· OSTI ID:5366777

Stephenson, T; Lester, J N

Two continuous stirred tanks reactors (CSTR) and four anaerobic fluidized bed reactors (AFBR) were used to study the treatment of a synthetic meat waste during single and two-stage anaerobic treatment. Four configurations were investigated; a single-stage CSTR and AFBR and the two-stage systems CSTR-AFBR and AFBR-AFBR. Startup of the anaerobic reactors was achieved within 50 days by use of a regime that included stepped increases in influent COD, methanol substitution of the substrate, and addition of essential trace metals such as cobalt and nickel. Two-stage reactors removed up to 85% of influent COD concentrations of 5000 mg/l, whereas the single-stage AFBR and CSTR removed 76 and 9%, respectively. The proportion of methane in the effluent gases increased as the influent COD concentration was increased. Volumetric production of methane was greatest for the first stage of the AFBR-AFBR system. Solids retention times calculated for the AFBRs ranged from 7 to 12 days, sufficient to support methanogenesis. The AFBRs and two-stage systems were more resistant to an influent pH shock from the operating value of pH 6.8 down to pH 3 than the CSTRs and single-stage reactors. It was concluded that high-rate anaerobic treatment systems were applicable to meat industry wastewaters and that two-stage digestion produced a better quality effluent. 3 references.

• Research Organization: Imperial College, London, England
• OSTI ID: 5366777
• Journal Information: Biotechnol. Bioeng.; (United States), Journal Name: Biotechnol. Bioeng.; (United States) Vol. 28:3; ISSN BIBIA
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
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ALCOHOLS
ALKANES
ANAEROBIC DIGESTION
BIOCONVERSION
BIOREACTORS
CHEMICAL OXYGEN DEMAND
COBALT
COMPARATIVE EVALUATIONS
CONTAINERS
DESIGN
DIGESTION
ELEMENTS
FLUIDIZED BEDS
FOOD INDUSTRY
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INDUSTRY
LIQUID WASTES
MANAGEMENT
MEAT INDUSTRY
METALS
METHANE
METHANOL
NICKEL
OPERATION
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PERFORMANCE TESTING
PH VALUE
PROCESSING
START-UP
STIRRING
SUBSTRATES
TANKS
TESTING
TRANSITION ELEMENTS
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER