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Copyright of Przegląd Elektrotechniczny is the property of Przeglad Elektrotechniczny and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study used chicken manure classified as lignocellulosic biomass due to its high straw content. This paper compares the possibility of using pulsed electric field (PEF) pretreatment of lignocellulosic substrates with ultrasonic disintegration (UP) to increase methane production. As for ultrasonic treatment, the BMP increased from 210.42 ± 7.92 mL/g VS to 250.06 ± 8.68 mL/g VS, whereas with PEF disintegration, the BMP ratio increased from 210.42 ± 7.92 mL/g VS to 248.90 ± 9.29 mL/g VS. The use of PEF and UP pretreatment increased methane production from 307.29 ± 13.65 mL/g VS to 366.99 ± 14.18 mL/g VS and from 307.29 ± 13.65 mL/g VS to 365.07 ± 11.71 mL/g VS, respectively. This study showed that both ultrasonic treatment and PEF contribute to the biochemical potential of methane (BMP) from chicken manure. [ABSTRACT FROM AUTHOR]

Copyright of Ecological Engineering / Inżynieria Ekologiczna is the property of Polish Society of Ecological Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ecological Engineering / Inżynieria Ekologiczna is the property of Polish Society of Ecological Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Ecological Engineering / Inżynieria Ekologiczna is the property of Polish Society of Ecological Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Enrichment of biogas, generated in an anaerobic continuously stirred tank reactor (CSTR), achieved by carbon dioxide removal with cultivated microalgae was assessed in terms of the process efficacy. An impact of this technological measure on the efficiency of microalgae biomass proliferation in the closed photobioreactor was also determined. In the experiment, the mixed microalgae culture was used, including Chlorella spp. (90%) and Scenedesmus spp. (10%), as well as the biogas from dairy wastewater fermentation. Raw biogas was used in variant 1 of the research and the pre-desulfurized biogas was applied in variant 2. The experiments demonstrated higher CO2 removal efficiency by the microalgae biomass when desulfurized biogas was applied in comparison to the technological system fuelled with the raw biogas. The highest rate of microalgae biomass increase and the highest final biomass content was observed in the system fuelled with the desulfurized biogas. Also, most efficient use of nutrients from the culture medium was found in this technological variant. In addition, it was established that the use of microalgae biomass to CO2 biosequestration and biogas enrichment led to the increased oxygen concentration in the biogas. [ABSTRACT FROM AUTHOR]

Some types of biomass require great inputs to guarantee high conversion rates to methane. The complex structure of lignocellulose impedes its penetration by cellulolytic enzymes, as a result of which a longer retention time is necessary to increase the availability of nutrients. To use the full biogas potential of lignocellulosic substrates, a substrate pretreatment is necessary before the proper methane fermentation. This article discusses the impact of the pretreatment of maize silage with a pulsed electric field on biogas productivity. The experiment showed a slight decrease in cellulose, hemicellulose and lignin content in the substrate following pretreatment with a pulsed electric field, which resulted in a higher carbohydrate content in the liquid substrate fraction. The highest biogas production output was obtained for the pretreated sample at the retention time of 180 s for 751.97 mL/g volatile solids (VS), which was approximately 14% higher than for the control sample. The methane production rate for the control sample was 401.83 mL CH4/g VS, and for the sample following disintegration it was 465.62 mL CH4/g VS. The study found that pretreatment of maize silage with a pulsed electric field increased the biogas potential. [ABSTRACT FROM AUTHOR]