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Experience to date with on-farm anaerobic digestion in the UK has been poor. For a number of reasons, many of these plants have not performed to expectations. The technology has been very much environmentally driven, often requiring integration with other farm activities. The resource is...
In this paper are reported changes in heat values (HV) with the seasons of the year for the different species which make up most of the undergrowth in Galicia (Spain). Knowledge of these values is essential when evaluating the possibility of exploiting the energy content of the bushes in...
In this investigation, steam pretreatment of willow with the addition of SO 2 or H 2 SO 4 was studied, the aim being to recover both the cellulose and the hemicellulose fractions. The willow was steamed (1 bar saturated steam) prior to impregnation with 0–3% H 2 SO 4 or 1% SO 2 (w/w substrate)....
Previous batch studies have shown that moss peat is a potentially useful biosorbent for treating metalcontaminated wastewaters. This paper examines the use of peat for the continuous adsorption of hexavalent chromium in columns. Adsorption at two pH values, 2·0 and 2·5, was examined and two...
Quantitative and qualitative variations in hexane and acetone extractables from 10 euphorbs were studied and compared with guayule. There were significant differences in quality, as well as the quantity of oligomers in various euphorbs. Hexane extractables were in relatively lower proportions...
Eight Sokoto red grower goats weighing 10–12 kg, in a randomized complete block design, were used in growth and digestion studies to determine the value of cowpea husk to the goat. The experimental diet was milled cowpea husk, providing an all-concentrate diet. The control diet was a 40:60...
Enteromorpha clathrata , a marine seaweed, can be grown in shallow ponds with an exchange of water once in several days to maintain salinity within tolerable limits. In fertilized conditions growth is rapid, 28 g dry weight m 2 day. This is less than the highest rates reported for other algae,...
Four pilot-scale batch reactors of 5 l volume each were used to study the effect of micro-aeration (240–720 ml/min or 0·05-0·15 v/v/min) on the cell growth rate, substrate utilization and ethanol production during cheese whey batch fermentation using the yeast Candida pseudotropicalis at...
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