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Filamentous foam disintegration with free nitrous acid: Effect on anaerobic digestion

2022 ◽  
Vol 139 ◽  
pp. 199-207
Author(s):  
Dorota Szypulska ◽  
Stanisław Miodoński ◽  
Kamil Janiak ◽  
Mateusz Muszyński-Huhajło ◽  
Anna Jurga
Keyword(s):  
Anaerobic Digestion ◽  
Nitrous Acid ◽  
Free Nitrous Acid ◽  
Acid Effect

Insights into the multi-targeted effects of free nitrous acid on the microalgae Chlorella sorokiniana in wastewater

2021 ◽  
pp. 126389
Author(s):  
Abdul-Wahab Abbew ◽  
Shuang Qiu ◽  
Ayesha Algade Amadu ◽  
Muhammed Zeeshan Qasim ◽  
Zhipeng Chen ◽  
...  
Keyword(s):  
Nitrous Acid ◽  
Chlorella Sorokiniana ◽  
Free Nitrous Acid

Inhibition of free nitrous acid and free ammonia on polyphosphate accumulating organisms: Evidence of insufficient phosphorus removal through nitritation-denitritation

2021 ◽  
Vol 297 ◽  
pp. 113390
Author(s):  
Dimitris Andreadakis ◽  
Constantinos Noutsopoulos ◽  
Gerasimos Fragkiskatos ◽  
Daniel Mamais ◽  
Theodora Misirli ◽  
...  
Keyword(s):  
Phosphorus Removal ◽  
Nitrous Acid ◽  
Free Ammonia ◽  
Free Nitrous Acid ◽  
Polyphosphate Accumulating Organisms

Enhancing anaerobic digestion using Free Nitrous Acid: identifying the optimal pre-treatment condition in continuous operation

2021 ◽  
pp. 117694
Author(s):  
Angelica Guerrero Calderon ◽  
Haoran Duan ◽  
Xiaoguang Chen ◽  
Ziping Wu ◽  
Wenbo Yu ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Nitrous Acid ◽  
Treatment Condition ◽  
Continuous Operation ◽  
Free Nitrous Acid ◽  
Pre Treatment

Combined hydrothermal and free nitrous acid, alkali and acid pretreatment for biomethane recovery from municipal sludge

2021 ◽  
Vol 131 ◽  
pp. 376-385
Author(s):  
Farokh laqa Kakar ◽  
Neha Purohit ◽  
Frances Okoye ◽  
Steven N. Liss ◽  
Elsayed Elbeshbishy
Keyword(s):  
Nitrous Acid ◽  
Municipal Sludge ◽  
Acid Pretreatment ◽  
Free Nitrous Acid

scholarly journals The effect of free nitrous acid pretreatment on the anaerobic digestibility of thickened waste activated sludge

2021 ◽  
Author(s):  
Frances Chi Okoye
Keyword(s):  
Continuous Flow ◽  
Flow System ◽  
Acid Pretreatment ◽  
Free Nitrous Acid ◽  
Continuous Flow System ◽  
Batch Tests ◽  
Sludge Pretreatment ◽  
Significant Research ◽  
Anaerobic Digestibility ◽  
Flow Experiments

Sludge pretreatment technologies as an avenue to improve solids handling in a WWTP has gained attention and significant research efforts are being directed towards studying several available techniques. The use of FNA as a chemical pretreatment for the AD has shown the potential to enhance the hydrolysis stage by releasing the internal organic matter of TWAS via its biocidal action. The effect of FNA on improving the biodegradability of TWAS was investigated in this thesis. The effect of the FNA on the TWAS characteristics and the methane production in batch tests was first studied. The optimum FNA dose was determined from the batch tests based on both solubilization and methane yields and then tested in a semi-continuous flow system. As the semi-continuous flow system failed when the optimum FNA dose obtained from the batch study was used, another set of semi-continuous flow experiments were conducted using different FNA doses

scholarly journals The effect of free nitrous acid pretreatment on the anaerobic digestibility of thickened waste activated sludge

2021 ◽  
Author(s):  
Frances Chi Okoye
Keyword(s):  
Continuous Flow ◽  
Flow System ◽  
Acid Pretreatment ◽  
Free Nitrous Acid ◽  
Continuous Flow System ◽  
Batch Tests ◽  
Sludge Pretreatment ◽  
Significant Research ◽  
Anaerobic Digestibility ◽  
Flow Experiments

Sludge pretreatment technologies as an avenue to improve solids handling in a WWTP has gained attention and significant research efforts are being directed towards studying several available techniques. The use of FNA as a chemical pretreatment for the AD has shown the potential to enhance the hydrolysis stage by releasing the internal organic matter of TWAS via its biocidal action. The effect of FNA on improving the biodegradability of TWAS was investigated in this thesis. The effect of the FNA on the TWAS characteristics and the methane production in batch tests was first studied. The optimum FNA dose was determined from the batch tests based on both solubilization and methane yields and then tested in a semi-continuous flow system. As the semi-continuous flow system failed when the optimum FNA dose obtained from the batch study was used, another set of semi-continuous flow experiments were conducted using different FNA doses

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