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Renewable Energy for Sustainable Growth Assessment. Группа авторовЧитать онлайн книгу.

Renewable Energy for Sustainable Growth Assessment - Группа авторов


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Chlorella vulgaris FSP-E Dilute acid hydrolysis (1% H2SO4) and fermentation by Zymomonas mobilis Bioethanol [45] Macroalgae (third-generation - 3G) Ulva sp. (Chlorophyta) Enzymatic hydrolysis - cellulase, amyloglucosidase, and amylase/ fermentation by Saccharomyces cerevisiae Bioethanol [46] Freshwater macroalgae Lipid extraction by soxhlet extraction method and anaerobic fermentation Biodiesel and bioethanol [47] Genetically engineered biomass (fourth-generation - 4G) Starch-excess OsSEX4-knockdown transgenic rice straw Biologically hydrolyzed by Trichoderma reesei and Aspergillus niger/fermented by Zymomonas mobilis – SSF process Bioethanol [48]

      The metabolic engineering of microorganisms with elevated organic matter explored for the development of biofuels forms that become the basis for developing fourth-generation biofuels [6]. The third and fourth generations of biofuel production include organic matter technology into biofuels (Table 3.3). Huang et al. [48] evaluated that genetically engineered OsSEX4-knockdown transgenic rice plants with starch accumulation higher than the wildtype forms as a potential source to produce bioethanol. OsSEX4 plays a vital role in the degradation of transitory starch; thus, it increases the plant’s starch content by knockdown. Genetically modified biomass produces bioethanol 50% higher than the wild-type straw in a vertical mass-flow type bioreactor (two-tank type bioreactor) by simultaneous saccharification and fermentation (SSF) [48, 52].

       3.3.1.5 Waste Biomass Resources

      Biomass waste constitutes both organic and inorganic compounds. It is an abundant bioresource available for gaseous or liquid-based bioenergy generation (hydrogen, methane, and ethanol) and biochemicals (volatile fatty acids, lactic, acetic, propionic, and butyric acid) [53].

      3.3.1.5.1 Agricultural and Forest Residues

      Biomass residues are produced in excess from the processing of crops. One of the significant fields of emphasis in various countries worldwide is the extraction of electricity from these residues [54]. The biomass residues that have appeared since primary crop harvesting are stalks, stems, leaves, husks, cobs. Stalks, straw, stems and leaves, husks, cobs, and others are the biomass residues that have emerged after primary crop harvesting [54]. They estimated that energy extracted from all these residues of agricultural biomass was 298,955 TJ and 65,491 TJ. Agricultural biomass and animal manure are the cheapest and most possible bioenergy sources (energy crops-wheat, rice, barley, corn, potatoes, apples, grapes, alfalfa, and other agricultural residues) in Iran [16]. It projected that biogas production of 11,523.84 and 16,026 million m3/year was from livestock and slaughter. Forest residues possess a comparatively large concentration of lignin – precursors of bio-phenols and bio-polyols [7].

      3.3.1.5.2 Industrial Waste

      The solid wastes of tannery industry waste are rich in collagen and 3 to 5% chromium oxide [23]. This content presence prevents the debris from fast degradation, but the high rate of degradation cause an obnoxious, intolerable smell during summer. Then, chromium accumulation into the soil contaminates the groundwater systems and affects the lives of aquatic animals and humans. Therefore tannery waste shows a high impact on the environment and leads to the world’s ecological problem.

      The primary source of industrial biomass comes from fish processing industries, including fish heads, viscera, vertebral column, fin, scales, and meat scraps as the fish processing industrial waste. The fish industry produces around 98g of fish waste per Kg of fish and fish crude oil waste of about 35g/100g of fish waste [24] (Table 3.4). However, these wastes are rich in micronutrients that cause a heavy impact on the environment if left untreated, mainly due to the high organic load.


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Яндекс.Метрика
Sources of industrial waste Biomass Process of conversion Biofuel products Reactor Reference
Tannery industry A mixture of pelletized leather tannery waste and hardwood pellets Combustion Ash Laboratory-scale combustion reactor (Perforated flat grate of combustion test reactor) [55]
Hides, collagen-based solid wastes - shavings and offcuts Pre-treatment by extrusion and enzymatic degradation Biogas along with diauxie Bioreactor [23]
Fish industry Fish waste (FW) and Fish crude oil waste (FCOW) extracted from common carp (Cyprinus carpio) viscera Anaerobic digestion (AD) using VDI 4630 as a reference Biogas (methane) Anaerobic mono-digestion system - 2L glass reactor [24]
Fish carcass and viscera Oil extraction Biofuel - [56]
Combustible industry Coal-water slurry based on coal processing waste (combustible industry waste) Gasification by direct light induction through solar radiation (allothermal process) Syngas Nanosecond pulse and continuous-wave laser [57]
Agroindustry Cattle slaughterhouse waste - Slaughtering waste streams like paunch (PA), soft offal (SO) (intestinal residues, fat and meat trimmings, and some blood), dissolved air flotation sludge (DAF) Anaerobic digestion (AD) at the mesophilic condition Biogas - [25]