Microbial biomass from renewables: Review of alternatives

Rolz, C.; Humphrey, Arthur E.

doi:10.1007/3-540-11019-4_5

Cited by 7 publications

(4 citation statements)

References 301 publications

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“…Mechanical and chemical pretreatments of straw were achieved according to Han and Anderson (1975), Millet et al (1976), Rolz and Humphrey (1982) and Chahal (1982). Rice straw dried at 105℃ was ground into small particles using an electric grinder, as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…These are cellulose crystallinity and lignin protection. Thus most research efforts have been related, in some way, to one or both of them (Rolz and Humphrey, 1982). Non-biological treatments have been used to render straw and other lignocellulosic materials more digestible for cattle (Al-Masri, 1999; Al-Masri and Guenther, 1999; Banchorndhevakul, 2002) or more susceptible to microbial or enzymatic attack (Araujo and D'Souza, 1986; Babitskaya, 1986; Hoda et al, 1990; Coronel et al, 1991; Bastawde, 1992; Patel and Bhatt, 1992).…”

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confidence: 99%

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Bioconversion of Straw into Improved Fodder: Preliminary Treatment of Rice Straw Using Mechanical, Chemical and/or Gamma Irradiation

2006

Mycobiology

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Crude protein (CP) content of mechanically ground rice straw into small particles by an electric grinder and reducing value (RV) and soluble protein (SP) in the culture filtrate were lower than that of the chopped straw into 5~6 cm lengths when both ground and chopped straws were fermented with Aspergillus ochraceus, A. terreus or Trichoderma koningii, at steady conditions. The reduction rate of RV, SP and CP was 22.2, 2.4, 7.3%; 9.1, 4.9, 8.5% or 0.0, 0.0, 3.6% for the three fungi, respectively. Chemical pretreatment of straw by soaking in NH4OH for a day caused significant increase in CP of the fermented straw than the other alkali and acidic pretreatments. Gamma irradiation pretreatment of dry and wet straw with water, specially at higher doses, 100, 200 or 500 kGy, caused significant increase in RV and SP as CP in the fermented straw by any of these fungi. Chemical-physical combination pretreatment of rice straw reduced the applied dose of gamma irradiation required for increasing fermentable ability of fungi from 500 kGy to 10 kGy with approximately the same results. Significant increases in RV and SP of fermented straw generally occurred as the dose of gamma irradiation for pretreated straw, which combined with NH4OH, gradually rose. Whereas, the increase percentage in CP of fermented straw that was pretreated by NH4OH-10 kGy was 12.4%, 15.4% or 8.6% for A. ochraceus, A. terreus or T. koningii, respectively.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

Bioconversion of Straw into Improved Fodder: Preliminary Treatment of Rice Straw Using Mechanical, Chemical and/or Gamma Irradiation

2006

Mycobiology

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“…Recent research reported on this subject has been briefly reported (35,36). Most of the work has been done with cereal straws from temperate countries; very few tropical lignocellulosic residues have been studied.…”

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confidence: 99%

Biodelignification of Lemon Grass and Citronella Bagasse by White-Rot Fungi

Rolz

Leon

Arriola

et al. 1986

Appl Environ Microbiol

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Twelve white-rot fungi were grown in solid-state culture on lemon grass (Cymbopogon citratus) and citronella (Cymbopogon winterianus) bagasse. The two lignocellulosic substrates had 11% permanganate lignin and a holocellulose fraction of 58%. After 5 to 6 weeks at 20°C, nine fungi produced a solid residue from lemon grass with a higher in vitro dry matter enzyme digestibility than the original bagasse; seven did the same for citronella. The best fungus for both substrates was Bondarzewia berkeleyi; it increased the in vitro dry matter enzyme digestibility to 22 and 24% for lemon grass and citronella, respectively. The increases were correlated with weight loss and lignin loss. All fungi decreased lignin contents: 36% of the original value for lemon grass and 28% for citronella. Practically all fungi showed a preference for hemicellulose over cellulose.

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“…small scale and pilot-plant scale under development, submerged culture, autotrophic, mixotrophic, and heterotrophic systems, recycling systems [136], [155] Biomass from renewable resources [89], [156][157][158][159] to develop a sound basis of knowledge necessary for using this process strategy.…”

Section: Operation Modesmentioning

confidence: 99%