Studies on reaction techniques concerning reactor design for the anaerobic degradation of complex substrates with the example of the methanation of effluents in the fermentation industry

1989 ◽  
Vol 4 (2) ◽  
pp. 63-74 ◽  
Author(s):  
A. Aivasidis ◽  
C. Wandrey ◽  
E. Hilla
Keyword(s):  
Anaerobic Degradation ◽  
Reactor Design

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

scholarly journals Anaerobic Degradation of Environmentally Hazardous Aquatic Plant Pistia stratiotes and Soluble Cu(II) Detoxification by Methanogenic Granular Microbial Preparation

Energies ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3849
Author(s):  
Olesia Havryliuk ◽  
Vira Hovorukha ◽  
Oleksandr Savitsky ◽  
Volodymyr Trilis ◽  
Antonina Kalinichenko ◽  
...  
Keyword(s):  
Aquatic Plants ◽  
Anaerobic Degradation ◽  
Aquatic Plant ◽  
High Efficiency ◽  
Pistia Stratiotes ◽  
Copper Compounds ◽  
Mechanical Removal ◽  
Microbial Preparation ◽  
Copper Contaminated ◽  
Potential Parameters

The aquatic plant Pistia stratiotes L. is environmentally hazardous and requires effective methods for its utilization. The harmfulness of these plants is determined by their excessive growth in water bodies and degradation of local aquatic ecosystems. Mechanical removal of these plants is widespread but requires fairly resource-intensive technology. However, these aquatic plants are polymer-containing substrates and have a great potential for conversion into bioenergy. The aim of the work was to determine the main patterns of Pistia stratiotes L. degradation via granular microbial preparation (GMP) to obtain biomethane gas while simultaneously detoxifying toxic copper compounds. The composition of the gas phase was determined via gas chromatography. The pH and redox potential parameters were determined potentiometrically, and Cu(II) concentration photocolorimetrically. Applying the preparation, high efficiency of biomethane fermentation of aquatic plants and Cu(II) detoxification were achieved. Biomethane yield reached 68.0 ± 11.1 L/kg VS of Pistia stratiotes L. biomass. The plants’ weight was decreased by 9 times. The Cu(II) was completely removed after 3 and 10 days of fermentation from initial concentrations of 100 ppm and 200 ppm, respectively. The result confirms the possibility of using the GMP to obtain biomethane from environmentally hazardous substrates and detoxify copper-contaminated fluids.

A novel integrated rotary reactor for NO reduction by CO and air preheating: Reactor design and heat transfer modelling

2021 ◽  
Vol 190 ◽  
pp. 116815
Author(s):  
Jianjie Li ◽  
Peiliang Sun ◽  
Xingxing Cheng ◽  
Xiangdong Li ◽  
Xiaotao T. Bi ◽  
...  
Keyword(s):  
Heat Transfer ◽  
No Reduction ◽  
Reactor Design ◽  
No Reduction By Co ◽  
Transfer Modelling ◽  
Rotary Reactor

scholarly journals Anaerobic Degradation of Choline

1960 ◽  
Vol 235 (12) ◽  
pp. 3592-3596 ◽  
Author(s):  
Hugh R. Hayward
Keyword(s):  
Anaerobic Degradation

New neutron imaging facility at the WWR-SM reactor: Design and first results

2021 ◽  
Vol 989 ◽  
pp. 164959
Author(s):  
B.A. Abdurakhimov ◽  
M.Yu. Tashmetov ◽  
B.S. Yuldashev ◽  
S.E. Kichanov ◽  
E.V. Lukin ◽  
...  
Keyword(s):  
Reactor Design ◽  
Neutron Imaging ◽  
First Results

Impact of organic loading rate and reactor design on thermophilic anaerobic digestion of mixed supermarket waste

2021 ◽  
Vol 123 ◽  
pp. 52-59
Author(s):  
L. Megido ◽  
L. Negral ◽  
Y. Fernández-Nava ◽  
B. Suárez-Peña ◽  
P. Ormaechea ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Loading Rate ◽  
Reactor Design ◽  
Organic Loading Rate ◽  
Organic Loading ◽  
Thermophilic Anaerobic Digestion
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