Short‐term oxidative lime pretreatment of palm pruning waste for use as animal feedstuff

Abstract

The results suggest that OLP improves the ruminal digestibility of date palm prunings, which may have potential for inclusion in the ruminant diet at low cost.

Pre-treatment of sugarcane bagasse with a combination of sodium hydroxide and lime for improving the ruminal degradability: optimization of process parameters using response surface methodology

“…Alkaline pre-treatment (using either lime or sodium hydroxide, or combination of them) for enhancing either ruminal digestibility or enzymatic digestibility in cellulosic-ethanol production process has been widely attempted (Haddad et al 1998;Xu & Cheng 2011;Ahmadi et al 2013;Chen et al 2013). For example, combination of sodium hydroxide and lime to enhance the enzymatic hydrolysis in lignocellulosic-ethanol production process was reported by Xu and Cheng (2011) in which, at the recommended conditions [6 h, 21°C, 1.0% (w/w) NaOH, and 0.2% (w/w) Ca(OH) 2 ], the glucose and xylose yields of switchgrass reached 59.4% and 57.3% of their theoretical yields, respectively.…”

“…In vitro gas production assay Prior to morning feeding, rumen fluid was harvested from two non-lactating fistulated Holstein cows fed a diet of wheat straw (30%), concentrate mix (40%) containing mineral/vitamin supplements and alfalfa hay (30%). Details for preparation of rumen fluid and artificial saliva were as described earlier (Ahmadi et al 2013). Gas volume in each volume-calibrated serum bottle, sealed with flanged butyl rubber stopper and aluminium crimp seal, was measured using a water displacement apparatus (Fedorak & Hrudey 1983) after 2, 4, 6, 8, 12, 16, 24, 48 and 72 h of incubation.…”

“…Although high-temperature alkali pre-treatment is fast and effective (Rezende et al 2011;Ahmadi et al 2013), but it is a high-energy demanding process, requiring heat-and corrosion-resistant equipment. Moreover, harsh pre-treatment conditions may lead to reactions that form carbon-carbon bonds between the lignin subunits; this can limit delignification and, subsequently decrease the enzymatic hydrolysis of carbohydrates (Pan et al 2004).…”

H2SO4 and NaOH Pretreatment to Enhance Bio-Oil Yield of Pine Wood Liquefaction in Methanol

“…The generator was set at 40 kV and 20 mA. The crystallinity index (CrI) was calculated using the following formula, based on the research by Segal et al (1959), (1) in which I002 is the peak intensity of the crystalline portion, at 2θ=22.5°, and Iam is the peak for the amorphous portion of biomass, given as 2θ=18.7° (Ahmadi et al 2013) in most of the literature.…”

A Systems View of Lignocellulose Hydrolysis

“…Lime is more efficient in the presence of an oxidizing agent such as hydrogen peroxide or oxygen itself (Ahmadi et al 2013). Lime costs less than NaOH and KOH and is easily recoverable by reaction with CO 2 .…”