Lignocellulosic Biomass Feeding in Biogas Pathway: State of the Art and Plant Layouts☆

Abstract The traditional pathway for biogas production consists in the anaerobic digestion of starchy and sugar biomass mainly from dedicated energy crops, needing agricultural land and heavy irrigation. A retrofitting of the existing biogas plants is proposed in order to reduce competition with food crops and to increase the sustainability of the whole chain in terms of land and water consumption; moreover the use of the lignocellulosic biomass is evaluated. The biomass after physical, chemical or biological pretreatment can be digested in a biogas plant to reduce the current diet without affecting the biogas production. The present study analyzes the state of the art in the lignocellulosic biomass feeding into biogas plants and describes a preliminary techno-economical study of the pathway and the layout to be adopted, including the efficiencies and energy yields of the involved processes

An Innovative Tool for Technical, Environmental and Economic Design of Building Energy Plants: A Case Study in Umbria

Abstract The European goals on environmental sustainability and carbon footprint reduction should be reached by the installation of Renewable Energy Sources (RES) plants. However, the massive development of RES plants has inevitably caused new relevant problems and critical situations due to their low energy density, their social acceptance and the non-programmability of some sources. A smart tool is proposed to evaluate the integration feasibility of different energy plants; this tool is also able to estimate the environmental impacts caused by the several proposed plants for building energy production in terms of land usage, carbon footprint and water consumption. A case study, a rural tower shaped building in Umbria, is analyzed to validate the innovative tool: environmental, energy and economic parameters are calculated to allow the designer to define the best energy plant configuration

Mass and Energy Flows of Cardoon Oil in a Prototype System for Seeds Milling and Vegetable Oil Treatment and Cogeneration

Abstract The experimentation was carried out in a prototype for the production of vegetable oil from seeds. The system consists of seeds storage, mill, filtration system, oil tanks and diesel engine for combined heat and power production. The vegetable oil tested is cardoon oil; cardoon biomass is the main topic of BIT3G project, that aims to develop biorefineries integrated in the territory through the use of biomass residues or sustainable energy crops (cardoon, black locust, miscanthus) in marginal lands. In this study the milling step was monitored in order to evaluate mass and energy flows; input biomass was separated into biomass residues and seeds, and each part was evaluated in terms of mass, moisture, low heating value. The milling products, vegetable oil and solid panel, were evaluated in terms of mass, moisture and energy content, estimating oil efficiency in the press and main characteristics. Finally an energy balance was performed monitoring the process energy consumption and energy potential using all obtained products, oil, panel and residues for power, heat and cooling purposes

architectural and energy refurbishment of the headquarter of the university of teramo

Abstract The recent seismic events, which distressed the population of the Central Italy, have caused the incompliance with national safety standards of several historical buildings. In particular, the headquarter of the University of Teramo revealed some structural damages which make necessary to operate a restoration of the buildings. It represents a rare opportunity for investigating possible applications of a cluster of technologies and approaches largely recognized as efficient and high-performing to such particular buildings in order to achieve an upgrading in terms of energy efficiency. The proposal includes the improvement of the exploitation of renewable energy sources through adequate systems, which do not modify the visual perception of the pavilions. In that regards, the required electricity could be produced by a PV roofing installed on the parking area, while a biomass boiler and an absorption chiller could allow supplying the thermal and cooling needs. Furthermore, the rain water recovery system permits to reduce the exploitation of potable water for uses which do not require a high quality, such as irrigation. On the other hand, the envelope energy efficiency could be enhanced by applying passive strategies for reducing the heat losses ( winter conditions ) and gains ( summer conditions ) through facades and roof. The results confirmed the reliability of those interventions and the consequent advantages from an economical and energy point of view

Energy valorization of poultry manure in a thermal power plant: experimental campaign

Abstract According with EU Directives, waste management is a major task with respect to the industrial productive cycles. Getting energy from residues can be possible by means of several technologies, to be chosen as a function of the waste main properties. The present paper will present an example of energetic valorization of poultry manure in an innovative gasification thermal power plant (300 kWt). Such experience has been developed by CRB (Biomass Research Center – University of Perugia) during the implementation of a national funded research project. Physical and chemical characterization of the litter will be shown, together with both the monitoring of the demo plant performances and the relevant features of the exhaust gases at the chimney

A Batch Digester Plant for Biogas Production and Energy Enhancement of Organic Residues from Collective Activities

Abstract An innovative little-sized batch biogas plant has been recently developed by the Italian Biomass Research Centre. It was fed by the residual biomass (agriculture residues and zootechnical wastes) produced by a farm located in the countryside of Perugia, Italy. The successful experience allowed the research group to design an upgrade of the existing plant, making it replicable to every communitarian activity such as Conference Halls, Schools, Condos, where organic biomass is produced as waste. Biomass recovery from markets, canteens and little food companies represents an opportunity for the installation of new residues-powered plants, achieving the production of both electricity and thermal energy for house heating and industrial processes. The collected biomass could also be integrated with pruning or residual biomass from the maintenance of the green and the neighbouring municipal wastewater from a septic tank. The simplicity, automaticity, and the cost-effectiveness of the plant, together with the incentives from electric energy injection to the grid, made the investment payable in a few years, allowing the operator to gain from renewable sources. Little sized biogas plants solves the problem of harvesting and disposal of the organic waste, reducing its transportation costs and producing green energy. The paper presents the preliminary design of the plant

Lignin as co-product of second generation bioethanol production from ligno-cellulosic biomass

Abstract To improve the economic viability of the biofuel production from biomass, it is of increasing importance to add value to the lignin produced as a bio-residue. Moreover, to meet the goal to replace 30% of fossil fuel by biofuels by 2030, a huge amount of lignin will soon be produced. The first major step involved to add value to the unconverted lignin is its separation from other biomass constituents to give high purity lignin. In this current work, extraction of lignin from a bio-residue (containing ca. 40% lignin) from second generation bioethanol production is presented. The biomass chosen is Arundo donax L. (or giant reed), which is non-food plant, can tolerate a wide variety of ecological conditions with all types of soils, and has increasingly importance as raw material for industrial purposes as a source of fibers alternative to wood, which availability is decreasing. Slightly different extraction procedures are investigated. Methods used are simple, mild, safe, and avoid destruction of fiber content in the bio- residue, with the final aim to valorize all fractions of the bio-residue, which is an essential step to make biofuel production to be cost effective. Lignins extracted are characterized by morphological analysis, using Scanning Electron Microscopy, SEM, and in terms of thermal behavior -using thermo gravimetric analysis TGA- which is critical for determining suitability of the lignin for polymer composite preparation with improved thermomechanical performance. The method judged as the best of the three leads rapidly to extraction of lignin free from fibers and ash, with thermal behavior suitable for composite preparation

refugee camps as an opportunity for promoting alternative development strategies based on carbon credits

Abstract The difficult social issues faced by non-governmental organizations regarding planning, management, and evolution of the refugee camps led to evaluating alternative development strategies. Indeed, innovative technologies could be promoted for sustainably enhancing local economy. The present model suggests the exploitation of high-albedo materials to generate cool oases in hot climate contexts. The benefits derived by this proposal were investigated by simulating the application of high-albedo devices on shelters in Zaatari, then the avoided carbon emissions were quantified, and several scenarios were discussed. In the framework of the Emissions Trading System, the carbon credits, which can be obtained and sold by contributing to the global warming mitigation process, are estimated to be around 150,000 tons CO 2-eq . Considering the market tendencies presented during the COP21 in Paris, the intervention is demonstrated to be sustainable in economic and environmental terms. The payback period is estimated in 3 years in the most reliable scenario. The work presents the main results of a wider research that also included consideration about the urban planning of the camps

Using the Oxford cognitive screen to detect cognitive impairment in stroke patients. A comparison with the Mini-Mental State Examination

Background: The Oxford Cognitive Screen (OCS) was recently developed with the aim of describing the cognitive de cits after stroke. The scale consists of 10 tasks encom- passing ve cognitive domains: attention and executive function, language, memory, number processing, and praxis. OCS was devised to be inclusive and un-confounded by aphasia and neglect. As such, it may have a greater potential to be informative on stroke cognitive de cits of widely used instruments, such as the Mini-Mental State Examination (MMSE) or the Montreal Cognitive Assessment, which were originally devised for demented patients. Objective: The present study compared the OCS with the MMSE with regards to their ability to detect cognitive impairments post-stroke. We further aimed to examine perfor- mance on the OCS as a function of subtypes of cerebral infarction and clinical severity. Methods: 325 rst stroke patients were consecutively enrolled in the study over a 9-month period. The OCS and MMSE, as well as the Bamford classi cation and NIHSS, were given according to standard procedures. results: About a third of patients (35.3%) had a performance lower than the cutoff (<22) on the MMSE, whereas 91.6% were impaired in at least one OCS domain, indicating higher incidences of impairment for the OCS. More than 80% of patients showed an impairment in two or more cognitive domains of the OCS. Using the MMSE as a standard of clinical practice, the comparative sensitivity of OCS was 100%. Out of the 208 patients with normal MMSE performance 180 showed impaired performance in at least one domain of the OCS. The discrepancy between OCS and MMSE was particularly strong for patients with milder strokes. As for subtypes of cerebral infarction, fewer patients demonstrated widespread impairments in the OCS in the Posterior Circulation Infarcts category than in the other categories. conclusion: Overall, the results showed a much higher incidence of cognitive impairment with the OCS than with the MMSE and demonstrated no false negatives for OCS vs MMSE. It is concluded that OCS is a sensitive screen tool for cognitive de cits after stroke. In particular, the OCS detects high incidences of stroke-specific cognitive impairments, not detected by the MMSE, demonstrating the importance of cognitive pro ling.Background: The Oxford Cognitive Screen (OCS) was recently developed with the aim of describing the cognitive deficits after stroke. The scale consists of 10 tasks encompassing five cognitive domains: attention and executive function, language, memory, number processing, and praxis. OCS was devised to be inclusive and un-confounded by aphasia and neglect. As such, it may have a greater potential to be informative on stroke cognitive deficits of widely used instruments, such as the Mini-Mental State Examination (MMSE) or the Montreal Cognitive Assessment, which were originally devised for demented patients. Objective: The present study compared the OCS with the MMSE with regards to their ability to detect cognitive impairments post-stroke. We further aimed to examine performance on the OCS as a function of subtypes of cerebral infarction and clinical severity. Methods: 325 first stroke patients were consecutively enrolled in the study over a 9-month period. The OCS and MMSE, as well as the Bamford classification and NIHSS, were given according to standard procedures. Results: About a third of patients (35.3%) had a performance lower than the cutoff(< 22) on the MMSE, whereas 91.6% were impaired in at least one OCS domain, indicating higher incidences of impairment for the OCS. More than 80% of patients showed an impairment in two or more cognitive domains of the OCS. Using the MMSE as a standard of clinical practice, the comparative sensitivity of OCS was 100%. Out of the 208 patients with normal MMSE performance 180 showed impaired performance in at least one domain of the OCS. The discrepancy between OCS and MMSE was particularly strong for patients with milder strokes. As for subtypes of cerebral infarction, fewer patients demonstrated widespread impairments in the OCS in the Posterior Circulation Infarcts category than in the other categories. Conclusion: Overall, the results showed a much higher incidence of cognitive impairment with the OCS than with the MMSE and demonstrated no false negatives for OCS vs MMSE. It is concluded that OCS is a sensitive screen tool for cognitive deficits after stroke. In particular, the OCS detects high incidences of stroke-specific cognitive impairments, not detected by the MMSE, demonstrating the importance of cognitive profiling. © 2018 Mancuso, Demeyere, Abbruzzese, Damora, Varalta, Pirrotta, Antonucci, Matano, Caputo, Caruso, Pontiggia, Coccia, Ciancarelli, Zoccolotti and The Italian OCS Grou

Innovative Bioplasticizers from Residual Cynara cardunculus L. Biomass-Derived Levulinic Acid and Their Environmental Impact Assessment by LCA Methodology

This work compares five bioplasticizersobtained from biomass-derivedlevulinic acid in terms of their environmental impacts together withPHB-induced thermal and mechanical properties.This work is focusedon the application of Life Cycle Assessment(LCA) methodology for the quantification of the potential environmentalimpacts associated with the obtainment of levulinic acid from residual Cynara cardunculus L. biomassand its subsequent valorization in innovative bioplasticizers fortuning the properties as well as the processability of biopolymers.This potentially allows the production of fully biobased and biodegradablebioplastic formulations, thus addressing the issues related to thefossil origin and nonbiodegradability of conventional additives, suchas phthalates. Steam explosion pretreatment was applied to the epigeanresidue of C. cardunculus L. followedby a microwave-assisted acid-catalyzed hydrolysis. After purification,the as-obtained levulinic acid was used to synthesize different ketal-diesterderivatives through a three-step selective synthesis. The levulinicacid-base additives demonstrated remarkable plasticizing efficiencywhen added to biobased plastics. The LCA results were used in conjunctionwith those from the experimental activities to find the optimal compromisebetween environmental impacts and mechanical and thermal properties,induced by the bioadditives in poly(3-hydroxybutyrate), PHB biopolymer