Polysorbate-80 Pretreatment Contributing to Volatile Fatty Acids Production Associated Microbial Interactions Via Acidogenic Fermentation of Waste Activated Sludge

2021 ◽  
Author(s):  
Xiaohuan Ai ◽  
Xiaodong Xin ◽  
Wenxuan Wei ◽  
JiaQian Xie ◽  
Junming Hong
Keyword(s):  
Fatty Acids ◽  
Activated Sludge ◽  
Volatile Fatty Acids ◽  
Microbial Interactions ◽  
Waste Activated Sludge ◽  
Polysorbate 80 ◽  
Acidogenic Fermentation

scholarly journals Volatile Fatty Acids and Biomethane Recovery from Thickened Waste Activated Sludge: Hydrothermal Pretreatment’s Retention Time Impact

Processes ◽  
2020 ◽  
Vol 8 (12) ◽  
pp. 1580
Author(s):  
Farokh laqa Kakar ◽  
Ahmed El Sayed ◽  
Neha Purohit ◽  
Elsayed Elbeshbishy
Keyword(s):  
Fatty Acids ◽  
Activated Sludge ◽  
Retention Time ◽  
Volatile Fatty Acids ◽  
Oxygen Demand ◽  
Hydrothermal Pretreatment ◽  
Waste Activated Sludge ◽  
Optimum Conditions ◽  
Pretreatment Temperature ◽  
Biomethane Production

The main objective of this study was to evaluate the hydrothermal pretreatment’s retention time influence on the volatile fatty acids and biomethane production from thickened waste activated sludge under mesophilic conditions. Six different retention times of 10, 20, 30, 40, 50, and 60 min were investigated while the hydrothermal pretreatment temperature was kept at 170 °C. The results showed that the chemical oxygen demand (COD) solubilization increased by increasing the hydrothermal pretreatment retention time up to 30 min and stabilized afterwards. The highest COD solubilization of 48% was observed for the sample pretreated at 170 °C for 30 min. Similarly, the sample pretreated at 170 °C for 30 min demonstrated the highest volatile fatty acids yield of 14.5 g COD/Lsubstrate added and a methane yield of 225 mL CH4/g TCODadded compared to 4.3 g COD/Lsubstrate added and 163 mL CH4/g TCODadded for the raw sample, respectively. The outcome of this study revealed that the optimum conditions for solubilization are not necessarily associated with the best fermentation and/or digestion performance.

Simultaneous Enhancement of Volatile Fatty Acids Production and Dewaterability of Waste-Activated Sludge Using Calcined Alkaline Residue

2019 ◽  
Vol 36 (5) ◽  
pp. 623-633 ◽  
Author(s):  
Cheng Huang ◽  
Jia Lai ◽  
Mingjing Zou ◽  
Xiuyun Sun ◽  
Jiansheng Li ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Activated Sludge ◽  
Volatile Fatty Acids ◽  
Waste Activated Sludge

Effect of Hydrothermal Pretreatment on Volatile Fatty Acids Production from Thickened Waste Activated Sludge

2019 ◽  
Vol 13 (2) ◽  
pp. 591-604 ◽  
Author(s):  
Farokh laqa Kakar ◽  
Ehssan Hosseini Koupaie ◽  
Ahmed Shabir Razavi ◽  
Hisham Hafez ◽  
Elsayed Elbeshbishy
Keyword(s):  
Fatty Acids ◽  
Activated Sludge ◽  
Volatile Fatty Acids ◽  
Hydrothermal Pretreatment ◽  
Waste Activated Sludge
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