AbstractDark fermentation hydrogen production from a mixture of food components using two different methods of methanogenic inhibition (autoclaving and BES) and three different temperatures (37, 60, and 70 Â?C) was examined in batch assays for two different mixed anaerobic cultures - one suspended sludge (S) obtained from an anaerobic digester and one granular sludge (G) obtained from a brewery wastewater treatment plant. In general, BES-inhibition of sludge was more robust when compared against...
Autori: Angela A. Abreu, Anthony S. Danko, Francisco Pinheiro, Maria Madalena Alves
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25308

? AN ASSESSMENT OF OPERATIONAL PARAMETERS FOR THE REMOVAL OF CHLOROPHENOLS FROM WASTEWATER ? ENVIRONMENTAL SCIENCES: A PSYCHOLOGICAL-BEHAVIORAL MODEL FOR RESEARCHERS ? ECOLOGICAL AGRICULTURE: DYNAMICS OF THE BIOLOGICAL ACTIVITIES IN SOILS CULTIVATED WITH MAIZE UNDER THE INFLUENCE OF ORGANIC FERTILIZATION ? SOLAR-ASSISTED JOULE-BRAYTON ENGINES USED TO REDUCE CARBON DIOXIDE EMISSIONS ? STUDY OF THE ENVIRONMENTAL EFFECTS OF HEATING SYSTEMS ? MIXED JET-VORTEX METHOD FOR ...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25662

Biomass is a very interesting natural source to obtain renewable energy as well as chemical products based on a renewable feedstock. Fuel produced from renewable resources is widely regarded as an option to substitute traditional fossil fuels and thus to answer to the adjunct climate debate. For the production of chemical substances from renewable substrates many process options are in investigation worldwide at the moment. However the ecological benefits of these technological options have to b...
Autori: Anton Friedl
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=25856

Mother Earth Investments AG, is actively working onthe development 2nd generation bioenergy feedstocks.In this book, Mr. Jansen generously shares hisknowledge in the field, in particular, regarding thechallenges and opportunities in development ofbiomass-derived fuels. This essential guide toinvesting in bioenergy commodities details secondgeneration biofuels from a scientific, technical andeconomic perspective, and discusses their globalenvironmental, political and financial impact.The book is ...
Autori: Roland A. Jansen
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26100

The book edited by Haibo Xie and NicholasGathergood focuses on one of the most importantscientific issues of the 21 century which is thereplacing fossil fuel with sustainable alternatives suchas biomass. Fossil fuels are conventional rawmaterials for many industrial sectors includingchemical and energy production. Usage of fossil fuelis limited by their availability, price and carbonfootprint. Biomass is a renewable resource globallyavailable, cheaper and carbon sequestering. Step bystep shiftin...
Autori: Adrian Catalin Puitel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26101

AbstractThe abundant availability of solid agroindustrial waste, sugarcane bagasse from sugar mills and juice extraction units, can bepotentially beneficial for the production of fermentation based biochemicals, paper boards and power. However, its role incausing bagassosis, an acute respiratory disease among the personnel handling large dry deposits has also been detected. Disposal of liquid waste whey from dairy industries poses a formidable threat to the aquatic ecosystem due to high BOD and ...
Autori: Manoj K. Ghosh
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26248

AbstractAnaerobic degradation (AD) of municipal solid waste (MSW) depends on the moisture and nutrient distribution within thebioreactor; these factors are affected by leachate recirculation. In this work, the effects of leachate recirculation of 15 to 120 byvolume percentage (%V) on AD were studied. The ojectives of this study are as follows: a) to determine which recirculation rateprovides the best conditions for accelerated anaerobic degradation (AD) and b) to determine the optimal range of r...
Autori: Maria del Consuelo Hernández-Berriel
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26557

Abstract Due to its very low moisture content, the solid waste from the two-phase olive oil extraction process (dry olive mill residue, DOR) can be easily stored and used as a readily available basal liquid culture medium via its reconstitution with water. Five white-rot fungi (namely Phanerochaete chrysosporium NRRL 6361, Lentinus tigrinus CBS 577.79, Pleurotus pulmonarius CBS 664.97, Phlebia radiata DABAC 9 and Botryosphaeria rhodina DABAC P82), previously selected in a screening program, ...
Autori: Alessandro D’Annibale
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26598

Abstract The oxygen transfer into the fermentation broths could be improved in presence of oxygen-vectors, without intensification of mixing or aeration. The experimental results for simulated, P. shermanii and S. cerevisiae broths indicated the significant increase of kLa, by adding n-dodecane, but the magnitude of this effect depends especially on the cells affinity for hydrocarbon droplets. Therefore, due to the higher affinity of yeasts cells for hydrocarbon droplets during their entire ...
Autori: Anca Irina Galaction
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26657

Abstract Succinic acid is widely used in different industries, its demand increasing each year. Therefore, efficiently producing it (especially from bio-regenerable sources) is an aspect that researchers try to solve thorough different methods, one of the approaches consisting in using process models for generating predictions and improving production by process optimization. In this work, a combination of two bio-inspired algorithms represented by Artificial Neural Networks and Clonal Selec...
Autori: Elena-Niculina Drăgoi
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26669

Abstract Bioplastics are biobased materials, usually easy biodegradable, derived from renewable resources. Evolution of bioplastics production is related to: bio starch and starch mixtures (74.5%); bioplastic products from fermentation (13%), bioplastic from petrochemicals materials (12.5%). They are seen as a viable solution to avoid some environmental impacts caused by the use of fossil-based conventional plastics. In this context, the general objectives of this study entail the analysis a...
Autori: Elena-Diana Comaniţă
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26688

Abstract In the process of chitin extraction, shrimp shell powder was treated by Lactobacillus plantarum culture. The efficiency of microbial demineralization (DM) under aerobic and anaerobic conditions was investigated. The shrimp shell powder was incubated at 30 °C for 6 days with L. plantarum. In order to prepare microbial culture, inoculums size was 5% for culture inoculation. Date syrup with total reduce sugar concentration of 30 g.L-1 was used. The value of pH in anaerobic conditio...
Autori: Marjan Khorrami
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26692

Abstract In this research, a small-scale biogas plant using methane fermentation was developed. The electrical energy consumed by the heater/pump and the outside temperature of the small-scale biogas plant were logged from 1 July 2007 until 31 July 2009. The thermal efficiency of the small-scale biogas plant was calculated based on the electrical energy consumed by the heater/pump and the generated gas quantity. The results showed that a total thermal efficiency of 17.5% was obtained in the ...
Autori: Daisuke Tashima
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26694

Abstract This study was aimed to stimulate laccase production by Trametes pubescens MUT 2400 by using a tomato-based medium. Two sequential 2x2 factorial designs were used to determine the effect of carbon (C) and nitrogen (N) source concentration on laccase activity and biomass concentration; copper was used as the sole inducer (0.75 mM). Analysis of the first factorial design showed that N had a strong positive effect on the maximum laccase activity, which occurred at day 12 of cultivation...
Autori: Federica Spina
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=26795

Rapeseed meal (RM) is an abundant and cheap by-product of oil extraction process. RM is a rich source of nitrogen, carbon, and minerals. Thanks to these features, RM has a striking potential for eco-friendly production of high value products in biotechnological processes. In this study, the possibility of using a low-cost medium based on the water soluble fraction of RM for laccase production by the fungus Pleurotus ostreatus has been evaluated and compared with the use of synthetic complex ...
Autori: Lucia Guarino
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27129

Waste frying oil (WFO) is a complex and heterogeneous waste collected mainly from restaurants and, to a lesser extent, from food processors and households. In the last decades, interest for this waste has deeply grown and a strong competition in grabbing this raw material has begun. About 90% of WFOs collected in Europe is recycled for biodiesel production, being the high free fatty acids (FFAs) concentration in WFOs one of the main drawback limiting the yield of the conversion process. In th...
Autori: Cinzia Pezzella
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27130

In this study, the potential for biogas production from biodegradable bioplastics was evaluated. Mater-Bi® (a family of maizestarch based flexible films) and PLA (PolyLactic Acid; a rigid, polylactide-based, polymer) bioplastics were digested in laboratory batch reactors, alone or in co-digestion with pig slurry or scotta (partially deproteinized cheese whey), at 35°C or 55°C. Methane (CH4) and hydrogen (H2) production were monitored during the incubation period. Maximum CH4 (Mmax...
Autori: Ciro Vasmara
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27134

In this study, S-TE pretreated mariculture organic waste (MOW) was used as substrate. Acid, alkaline, S-TE, sterilization and microwave pretreated waste sludge was used as inoculation respectively. The highest hydrogen yield of 22.02 ml H2/g COD (chemical oxygen demand) was obtained from MOW with sterilization pretreated inoculation at mesophilic conditions in batch reactors. The impacts of different pretreatments on the changes of soluble chemical oxygen demand (SCOD), protein, carbohydrate, pH...
Autori: Liang Guo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27193

This research offers a novel approach for potato wastewater (PW) bioconversion to alcohol by microwaves gelatinization, liquefaction and simultaneous saccharification and fermentation (SSF). Concentrated PW from potato processing to obtain fries was treated by gelatinization, enzymatic hydrolysis through liquefaction and saccharification, and fermentation; a mini-bioreactor was used, with low oxygen, temperature, pH and mixing control. The yeast Saccharomyces cerevisiae and a commercial mix of l...
Autori: Maria Iasmina Moza
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27275

With population growth and increasing industrialization, enormous amounts of agro-industrial wastes are being produced. Without proper use, these keep piling up leading to tremendous pressure on environmental safety. There is also considerable economic interest not only in the proper utilization of these wastes, but also in developing appropriate processes for this purpose. Sludge generated in pulp and paper mills is one of such solid wastes. Although several studies have investigated its reuse,...
Autori: Patrícia Raquel Silva Zanoni
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27320

The paper aims to present the sorption properties of two sorbent substrates (composts) prepared by aerobic fermentation from vegetables waste composted with beech sawdust (BR2) and beech ash (BC1) to be used for Cu2+ removal from wastewaters. The composts structures and surface properties were characterised in terms of active groups (FTIR), crystallinity (XRD), morphology (SEM), topography (AFM) and specific surface and pores analysis (BET), and the changes in properties after Cu2+ sorption were...
Autori: Ileana Manciulea
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27323

Acetone-Butanol-Ethanol (ABE) industrial production by fermentation is strongly affected by the low concentration of solvent (<25 g/L) that affects the cost of the recovery process. To decrease the overall cost of the butanol production, alternative routes for the recovery have proposed in literature. This paper presents a techno-economic analysis of an innovative butanol recovery process from ABE fermentation broth based on gas stripping technique. The comparison with a recovery process bas...
Autori: Lucia Salemme
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27346

The utilization of agro-industrial waste as a potential substrate for producing enzymes may serve a dual purpose of reducing the environmental pollution along with producing a high value commercial product. Twelve different agro-industrial wastes were evaluated for extracellular BGL (β-glucosidase) production by a mutant of Bacillus subtilis on solid state fermentations (SSF). The Citrus sinensis bagasse was found to be the most suitable substrate with highest BGL titer (35 U/gds). Optimum ...
Autori: Ruchi Agrawal
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27378

This study was to optimize the fermentation process for protein enrichment of potato starch residue (PSR) by solid state fermentation with mixed strains. Three single-factor experiments were conducted to optimize the fermentation conditions, and a Plackett-Burman design followed by a central composite design of response surface methodology was investigated to optimize the medium constituents. The optimal fermentation conditions were fermentation temperature 28°C, fermentation period 72 h and...
Autori: Heng Lei
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27380

• EXPERIMENTAL INVESTIGATION OF TEMPERATURE EFFECTS ON THE PARAMETERS OF PHOTOVOLTAIC PANELS    • CONCENTRATIONS OF CHROMIUM, CADMIUM AND NICKEL IN TWO CONSUMED FISH SPECIES OF PERSIAN GULF, IRAN    • IMPROVING THE ENERGY EFFICIENCY OF RESIDENTIAL BUILDINGS BY USING A DRAIN WATER HEAT RECOVERY SYSTEM    • ASSESSMENT OF METAL CONTAMINATION AND ECOLOGICAL RISK IN URBAN SOILS SITUATED NEAR A METALLURGICAL COMPLEX    • FINANCIAL DE...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27398

EXPERIMENTAL INVESTIGATION OF TEMPERATURE EFFECTS ON THE PARAMETERS OF PHOTOVOLTAIC PANELS    • CONCENTRATIONS OF CHROMIUM, CADMIUM AND NICKEL IN TWO CONSUMED FISH SPECIES OF PERSIAN GULF, IRAN    • IMPROVING THE ENERGY EFFICIENCY OF RESIDENTIAL BUILDINGS BY USING A DRAIN WATER HEAT RECOVERY SYSTEM    • ASSESSMENT OF METAL CONTAMINATION AND ECOLOGICAL RISK IN URBAN SOILS SITUATED NEAR A METALLURGICAL COMPLEX    • FINANCIAL DEVELOPME...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27399

The aim of present study was the effective utilization of waste apple for high yield of ethanol using immobilized cells of Saccharomyces cerevisiae S-3S through fed-batch fermentation. Low cost biomaterial was also developed for immobilization. Immobilization was carried out on different inert supports (agar-agar, k-carrageenan, Ca-alginate, sugar cane bagasse and apple bagasse). The results revealed that immobilized cells of S. cerevisiae S-3S gave high yield of ethanol as compared to free c...
Autori: Arifa Tahir
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27425

In the present study, anaerobic treatment of food wastes from restaurants of a fermentation industry and methane gas production yields produced during the treatment were investigated. For this purpose, food wastes with a Total Solid Contents (TS) ratio of 5- 7-10% were digested in a 100l experimental reactor. Batch anaerobic digestion studies were conducted at mesophilic temperatures (36.5 oC) for 30 days and optimum Volatile Fatty Acids (VFA) and alkalinity values for methane gas production ...
Autori: Sevgi Fersiz
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27429

This study emphasis the hydrogen fermentation from de-oiled Jatropha waste (DJW), a secondary and promising waste from biodiesel industry via influence of various combination of heat pretreatment using sewage sludge as inoculum. Batch experiments were carried out at a DJW concentration of 50 g/L, temperature of 55oC and an initial cultivation pH of 7. The peak hydrogen production rate and hydrogen yield of 16.3 mmol H2/L-d and 1.10 mmol H2/g volatile solids (VS), respectively, were obtained ...
Autori: Gopalakrishnan Kumar
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27874

The objective of this work was to evaluate the effects of six lactic acid bacterial strains originated from different natural habitats of fermented food and feedstuff on pasture grass and alfalfa laboratory scale silages. The prepared mini silos were inoculated with the following bacterial strains alone or in combination: Lactobacillus brevis LbB (2x107 cfu/mL), Enterococcus faecalis EF (3.6x108 cfu/mL), Lactobacillus plantarum subsp. plantarum LbP (2.8x108 cfu/mL), Weissella paramesenteroide...
Autori: Éva Laslo
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27933

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27946

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27947

• ENVIRONMENTAL CHANGES IN NORTH-EASTERN ROMANIA – A TRIGGER FACTOR FOR LYME DISEASE    • HYDROGEOCHEMISTRY AND ENVIRONMENTAL ISOTOPE COMPOSITIONS AND THEIR EVOLUTION IN GEOTHERMAL GROUNDWATER IN YIZHANG, HUNAN PROVINCE, CHINA    • CONSTRUCTION OF A BIOGAS HEAT STORAGE GREENHOUSE ECOSYSTEM UNDER THE CONTEXT OF WATER POLLUTION RESULTING FROM LIVESTOCK BREEDING    • ENVIRONMENTAL NOISE: HEALTH AND POLICY - AN UP TO DATE MINIREVIEW  &nb...
Autori:
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=27968

The present study represents an extension of ergosterol production by Saccharomyces cerevisiae fermentation processes using oxygen-vector by establishing the influence of the analyzed main factors, such as aeration efficiency and hydrocarbon concentration. The study has been developed for batch and fed-batch fermentation systems and has been focused on the variation of ergosterol content inside the yeast cells during the fermentation cycle in correlation with hydrocarbon volumetric fraction, COV...
Autori: Corina Ciobanu
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28130

The steady increase in separate waste collection has highlighted the urgent need to adequately deal not only with urban waste (differentiated and undifferentiated) but also with special waste produced by separate waste collection and recycling processes. Source collected municipal solid waste produces different waste streams. One of this is the organic fraction of municipal solid waste (OFMSW). This fraction is central for circular economy, since it can be further transformed in order to recove...
Autori: Ivana Moscato
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28302

Biomethane is incentivized in Italy and in many other European countries as a substitute fuel for transport, in order to reduce fossil fuel and cut CO2 emissions. In Italy, Certificato di Immissione in Consumo (CIC) is actually sustaining biomethane production, charging petrochemical companies who need to cover their obligation quotes. Actually, biomethane production has to fulfil sustainability requirements in order to be entitled to get CIC. Sustainability principles are, among others, the typ...
Autori: Ivana Moscato
ISSN: 1843 - 3707
http://www.ecozone.ro/reviste.php?RID=28305