biogas digestate
Recently Published Documents


TOTAL DOCUMENTS

110
(FIVE YEARS 58)

H-INDEX

16
(FIVE YEARS 4)

2021 ◽  
Author(s):  
Mohamed Elshamy ◽  
Christine Rösch

Abstract This work investigates the environmental potential to develop a circular economy solution to create benefit from agricultural waste by integrating microalgae technology into the nutrient-rich digestate (NRD) stream from anaerobic digestion plants. Different environmental benefits can be captured by algal uptake of nitrate and the scarce resource phosphorus from biogas digestate. First, unwanted excess nutrients polluting groundwater are reduced and second, the algal animal feed can substitute soybean meal (SM) imported to North-Western Europe (NWE). That allows a decentralised circular bio-economy and avoids deforestation of rainforests due to SM overseas import. Life cycle assessments were conducted based on novel data from engineers in academia and industry, acquired through pilot-scale research facilities in United Kingdom, France, and Belgium. The findings of this study highlight the environmental impacts of three different technologies with varying scales of production and offer recommendations based on sensitive analysis for more sustainable pathways. In this study, a pilot-scale bio-refinery is considered a promising solution to excess nutrients in fertilisers in the NWE and an alternative source for imported SM as an animal feed source, having a comparable environmental footprint.


2021 ◽  
pp. 319-347
Author(s):  
Mustafa Sürmen ◽  
Emre Kara

2021 ◽  
pp. 1-11
Author(s):  
Marion Gebhardt ◽  
Nina Wanek ◽  
Andreas Lemmer ◽  
Götz theodor Gresser

2021 ◽  
pp. 126794
Author(s):  
Yanshan Wang ◽  
Yingjin Song ◽  
Ning Li ◽  
Wen Liu ◽  
Beibei Yan ◽  
...  

Author(s):  
Jasper Tembeck Mbah ◽  
Joanna Chmist-Sikorska ◽  
Krzysztof Szoszkiewicz ◽  
Wojciech Czekała

AbstractThis study focused on the reaction of bivalve molluscs to biogas digestate, which is a waste product of an increasingly developing biogas production in rural areas worldwide. The effects of biogas digestate on aquatic organisms are not fully known, and neither this substance nor any types of manure were tested in the monitoring based on valvometry, which is a biomonitoring method based on bivalve behavior. The change in bivalves functioning in biogas digestate inflow was studied using three different diluted digestate concentrations. Exposure to the highest concentration of digestate induced a decline of mean shell opening and activity time of Unio tumidus species. A significant difference in behavioral patterns was recorded during the first 10 min after exposure to the digestate. A Gradual decreasing tendency of shell opening levels was apparent under the highest concentration reaching 55% compared to the pretreatment value. Also, a decreasing tendency was observed under the medium concentration (82.4% of initial level) after 2 h, while an increase in shell opening levels was recorded in the most diluted digestate. This research work proved that the inflow of biogas digestate has significant impact on bivalves’ behavior. Unio tumidus is a sensitive indicator of biogas digestate inflow in the aquatic environment. Moreover, it proved that the opening and closing activities over time depend on the concentration of the digestate. Therefore, the mollusk bivalves might be utilized in early warning systems to detect organic pollutants in water.


Author(s):  
Musa Bishir ◽  
Marium Tariq ◽  
Dominik Wüst ◽  
Lena Schleicher ◽  
Julia Steuber ◽  
...  

Microbial fuel cell (MFC) is an evolving technology for anaerobic bioenergy generation using electrodes and organic wastewater as a feedstock for catabolic activities of electrogenic bacteria and subsequent electricity generation. The search for suitable inexpensive electrode materials remains the leading interest of researchers in this field. The work here focused on comparative bioelectricity generation from HTC process water (pH = 5.99) and treated–biogas digestate (pH = 7.97) using locally developed corncob pyrochar electrodes and graphite in dual-chambered microbial fuel cells (MFC). The electrodes used in this study were graphite rod (non-porous and very low surface area), KOH–activated corncob pyrochar (KAC) of BET surface area, 1626 m2 g-1 and steam activated corncob pyrochar (SAC) with 485.8 m2 g-1. The highest power outputs achieved were 323.8 µW and 316.8 µW from HTC process water with SAC and KAC electrodes respectively at an external load of 47 Ω. The initial COD (48780 mg L-1), DOC (4000 mg L-1), and TNb (5600 mg L-1) of the biogas digestate decreased significantly to 36405, 3610 and 4300 mg L-1 respectively in the MFC with KOH-activated corncob pyrochar electrodes. The MFC operated with KAC electrode and treated biogas digestate was the most efficient having Coulombic efficiency of 75 % in a comparatively shorter residence time of MFC operation than the MFC with SAC electrode which had a lower Coulombic efficiency of 64 %.


Sign in / Sign up

Export Citation Format

Share Document