Acid inhibition during anaerobic digestion of biodegradable kitchen waste

2015 ◽  
Vol 7 (2) ◽  
pp. 023118 ◽  
Author(s):  
Benlin Dai ◽  
Jiming Xu ◽  
Yulong He ◽  
Peng Xiong ◽  
Xinfeng Wang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Acid Inhibition ◽  
Kitchen Waste

scholarly journals Enhancement of Food Waste Management and Its Environmental Consequences

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1790
Author(s):  
Jan den Boer ◽  
Gudrun Obersteiner ◽  
Sebastian Gollnow ◽  
Emilia den Boer ◽  
Renata Bodnárné Sándor
Keyword(s):  
Anaerobic Digestion ◽  
Waste Management ◽  
Environmental Effects ◽  
Ghg Emissions ◽  
Primary Energy ◽  
Biological Pretreatment ◽  
Environmental Benefit ◽  
Kitchen Waste ◽  
Considerable Saving ◽  
Positive Effects

This paper assesses the potential environmental effects of the optimization of the kitchen waste management in Opole. The separate collection of kitchen waste is improved by distribution of separate collection kits consisting of an in-home bin and 10 L biodegradable bags. The surplus of collected kitchen waste is diverted from treatment in a mechanical-biological pretreatment (MBP) along with the residual waste to anaerobic digestion (AD) with the biowaste. This has positive effects on European and Polish goals, ambitions, and targets, such as (i) increasing the level of renewables in the primary energy supply, (ii) decreasing the level of greenhouse gas (GHG) emissions, (iii) increasing the level of preparation for reuse and recycling of municipal waste. The environmental effects of 1 ton additionally separately collected and treated kitchen waste are determined by using life cycle assessment. It was shown that in all selected impact categories (global warming potential, marine eutrophication potential, acidification potential, and ozone depletion potential) a clear environmental benefit can be achieved. These benefits are mainly caused by the avoided emissions of electricity and heat from the Polish production mix, which are substituted by energy generation from biogas combustion. Optimization of the waste management system by diversion of kitchen waste from mechanical-biological pretreatment to anaerobic digestion can lead to considerable saving of 448 kg CO2-eq/t of waste diverted. With an estimated optimization potential for the demonstration site of 40 kg/inh·year for the city of Opole, this would lead to 680,000 t CO2-eq savings per year for the whole of Poland. The sensitivity analysis showed that with a choice for cleaner energy sources the results would, albeit lower, show a significant savings potential.

A new strategy to recover from volatile fatty acid inhibition in anaerobic digestion by photosynthetic bacteria

2020 ◽  
Vol 311 ◽  
pp. 123501 ◽  
Author(s):  
Weixin Zhao ◽  
Jinhui Jeanne Huang ◽  
Binbin Hua ◽  
Zhiyong Huang ◽  
Ronald L. Droste ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Volatile Fatty Acid ◽  
Photosynthetic Bacteria ◽  
Acid Inhibition ◽  
New Strategy ◽  
Fatty Acid Inhibition

scholarly journals Enhancement anaerobic digestion and methane production from kitchen waste by thermal and thermo-chemical pretreatments in batch  leach bed reactor with down flow

2018 ◽  
Vol 64 (No. 3) ◽  
pp. 128-135 ◽  
Author(s):  
Radmard Seyed Abbas ◽  
Alizadeh Hossein Haji Agha ◽  
Seifi Rahman
Keyword(s):  
Anaerobic Digestion ◽  
Microwave Irradiation ◽  
Methane Production ◽  
Biogas Production ◽  
Oxygen Demand ◽  
Lag Phase ◽  
Kitchen Waste ◽  
Gompertz Equation ◽  
Chemical Pretreatments ◽  
Pretreatment Conditions

The effects of thermal (autoclave and microwave irradiation (MW)) and thermo-chemical (autoclave and microwave irradiation – assisted NaOH 5N) pretreatments on the chemical oxygen demand (COD) solubilisation, biogas and methane production of anaerobic digestion kitchen waste (KW) were investigated in this study. The modified Gompertz equation was fitted to accurately assess and compare the biogas and methane production from KW under the different pretreatment conditions and to attain representative simulations and predictions. In present study, COD solubilisation was demonstrated as an effective effect of pretreatment. Thermo-chemical pretreatments could improve biogas and methane production yields from KW. A comprehensive evaluation indicated that the thermo-chemical pretreatments (microwave irradiation and autoclave- assisted NaOH 5N, respectively) provided the best conditions to increase biogas and methane production from KW. The most effective enhancement of biogas and methane production (68.37 and 36.92 l, respectively) was observed from MW pretreated KW along with NaOH 5N, with the shortest lag phase of 1.79  day, the max. rate of 2.38 l·day<sup>–1</sup> and ultimate biogas production of 69.8 l as the modified Gompertz equation predicted.

Effects of adding osmoprotectant on anaerobic digestion of kitchen waste with high level of salinity

2019 ◽  
Vol 128 (6) ◽  
pp. 723-732 ◽  
Author(s):  
Yanping Liu ◽  
Yu Yuan ◽  
Wei Wang ◽  
Akiber Chufo Wachemo ◽  
Dexun Zou
Keyword(s):  
Anaerobic Digestion ◽  
Kitchen Waste ◽  
High Level

scholarly journals Comparing two enhancing methods for improving kitchen waste anaerobic digestion: Bentonite addition and autoclaved de-oiling pretreatment

2018 ◽  
Vol 115 ◽  
pp. 116-124 ◽  
Author(s):  
Duojiao Zhang ◽  
Na Duan ◽  
Hailin Tian ◽  
Cong Lin ◽  
Yilin Zhang ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Kitchen Waste
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