Catabolic Pathways and Enzymes Involved in the Anaerobic Degradation of Terpenes

2020 ◽  
pp. 151-164
Author(s):  
Jens Harder ◽  
Robert Marmulla
Keyword(s):  
Anaerobic Degradation ◽  
Catabolic Pathways

Surface charge and extracellular polymer of sludge in the anaerobic degradation process

1996 ◽  
Vol 34 (5-6) ◽  
pp. 309-316 ◽  
Author(s):  
X. S. Jia ◽  
Herbert H. P. Fang ◽  
H. Furumai
Keyword(s):  
Surface Charge ◽  
Growth Phase ◽  
Anaerobic Degradation ◽  
Degradation Process ◽  
Anaerobic Sludge ◽  
Batch Experiments ◽  
High Substrate Concentration ◽  
Negative Surface ◽  
Negative Surface Charge ◽  
Extracellular Polymer

Changes of surface charge and extracellular polymer (ECP) content were investigated in batch experiments for three anaerobic sludges, each of which had been enriched at 35°C and pH 639-7.3 for more than 40 batches using propionate, butyrate and glucose, individually, as the sole substrate. Results showed that both ECP and the negative surface charge were dependent on the growth phase of microorganisms. They increased at the beginning of all batches when the microorganisms were in the prolific-growth phase, having high substrate concentration and food-to-microorganisms ratio. Both later gradually returned to their initial levels when the microorganisms were in the declined-growth phase, as the substrate became depleted. The negative surface charge increased linearly with the total-ECP content in all series with slopes of 0.0187, 0.0212 and 0.0157 meq/mg-total-ECP for sludge degrading propionate, butyrate and glucose, respectively. The change of surface charge for the first two sludges was mainly due to the increase of proteinaceous fraction of ECP; but, for glucose-degrading sludge, that could be due to the increases of both proteinaceous and carbohydrate fractions of ECP. The negative-charged nature of anaerobic sludge implies that cations should be able to promote granulation of anaerobic sludge.

Anaerobic degradation behavior of nonylphenol polyethoxylates in sludge

Chemosphere ◽  
2008 ◽  
Vol 71 (2) ◽  
pp. 345-351 ◽  
Author(s):  
Jian Lu ◽  
Qiang Jin ◽  
Yiliang He ◽  
Jun Wu ◽  
Wenying Zhang ◽  
...  
Keyword(s):  
Anaerobic Degradation ◽  
Degradation Behavior

The production of ferrous ions driven by anaerobic degradation of plant biomass and improved phosphorus removal in constructed wetlands

2021 ◽  
Vol 293 ◽  
pp. 126152
Author(s):  
Chang Su ◽  
Luoying Lin ◽  
Meiling Zhang ◽  
Haitao Zhong ◽  
Guangwei Yu ◽  
...  
Keyword(s):  
Constructed Wetlands ◽  
Phosphorus Removal ◽  
Anaerobic Degradation ◽  
Plant Biomass ◽  
Ferrous Ions
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