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Enzymatic and metabolic activities of four anaerobic sludges and their impact on methane production from ensiled sorghum forage.

Abstract：

:Biochemical methane potential (BMP) tests were run on ensiled sorghum forage using four inocula (urban, agricultural, mixture of agricultural and urban, granular) and differences on their metabolic and enzymatic activities were also discussed. Results indicate that no significant differences were observed in terms of BMP values (258±14NmLCH4g(-1)VS) with a slightly higher value when agricultural sludge was used as inoculum. Significant differences can be observed among different inocula, in terms of methane production rate. In particular the fastest biomethanization occurred when using the urban sludge (hydrolytic kinetic constant kh=0.146d(-1)) while the slowest one was obtained from the agricultural sludge (kh=0.049d(-1)). Interestingly, positive correlations between the overall enzymatic activities and methane production rates were observed for all sludges, showing that a high enzymatic activity may favour the hydrolysis of complex substrate and accelerate the methanization process of sorghum.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Sambusiti C,Rollini M,Ficara E,Musatti A,Manzoni M,Malpei F

doi

10.1016/j.biortech.2013.12.055

subject

Has Abstract

pub_date

2014-03-01 00:00:00

pages

122-8

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(13)01895-6

journal_volume

155

pub_type

杂志文章

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