HIGH-RATE LOW SOLIDS METHANE FERMENTATION OF SORGHUM, CORN AND CELLULOSE

被引：18

作者：

RICHARDS, BK

CUMMINGS, RJ

JEWELL, WJ

机构：

[1] Department of Agricultural and Biological Engineering, Cornell University, Ithaca, NY 14853-5701, Riley-Robb Hall

来源：

BIOMASS & BIOENERGY | 1991年 / 1卷 / 05期

关键词：

ANAEROBIC DIGESTION; METHANE; BIOGAS; BIOMASS; TRACE NUTRIENTS; SORGHUM; CORN; FIBER ANALYSIS; C-N RATIO;

D O I：

10.1016/0961-9534(91)90036-C

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Sorghum, sorghum/alpha-cellulose mixture, and corn were anaerobically digested at 55-degrees-C at effluent solids contents of 8-12% total solids (TS), using trace nutrient supplementation. Volatile solids (VS) loading rates at much higher levels than conventional maxima were maintained without volatile fatty acid (VFA) accumulation. Semi-continuously fed digesters with organic loading rates (OLR) up to 12 gVS kg-1 d-1 produced methane at rates up to 3.3 L kg-1 d-1. Continuous feeding of corn at an OLR of 18 gVS kg-1 d-1 resulted in a methane production rate of 5.4 L kg-1 d-1. VS removal efficiencies at maximum OLRs were 60% (sorghum) and 67% (corn). At an OLR of 4 gVS kg-1 d-1, sorghum alone as a feedstock led to excess ammonia-N accumulation. Excess ammonia did not accumulate at sorghum loading rates of 8 and 12 gVS kg-1 d-1, nor with a sorghum/alpha-cellulose mix loaded at 8 gVS kg-1 d-1. Instantaneous gas production rates were directly related to feedstock cell soluble content, with peak instantaneous biogas production rates from corn (OLR of 8 gVS kg-1 d-1) approaching 25 L kg-1 d-1 following a three-day feeding.

引用

页码：249 / 260

页数：12

共 19 条

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