scholarly journals Survival rates of parasite eggs in sludge during aerobic and anaerobic digestion.

1982 ◽  
Vol 44 (5) ◽  
pp. 1138-1143 ◽  
Author(s):  
M I Black ◽  
P V Scarpino ◽  
C J O'Donnell ◽  
K B Meyer ◽  
J V Jones ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Survival Rates ◽  
Aerobic And Anaerobic

scholarly journals Comparison of the impacts of thermal pretreatment on waste activated sludge using aerobic and anaerobic digestion

2018 ◽  
Vol 78 (8) ◽  
pp. 1772-1781 ◽  
Author(s):  
Hyungjun (Brian) Jo ◽  
Wayne Parker ◽  
Peiman Kianmehr
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Oxygen Demand ◽  
Waste Activated Sludge ◽  
Thermal Pretreatment ◽  
Decay Products ◽  
Anaerobic Biodegradability ◽  
Pretreatment Conditions ◽  
The Impact ◽  
Aerobic And Anaerobic

Abstract A range of thermal pretreatment conditions were used to evaluate the impact of high pressure thermal hydrolysis on the biodegradability of waste activated sludge (WAS) under aerobic and anaerobic conditions. It was found that pretreatment did not increase the overall extent to which WAS could be aerobically biodegraded. Thermal pretreatment transformed the biodegradable fraction of WAS (XH) to readily biodegradable chemical oxygen demand (COD) (SB) (16.5–34.6%) and slowly biodegradable COD (XB) (45.8–63.6%). The impact of pretreatment temperature and duration on WAS COD fractionation did not follow a consistent pattern as changes in COD solubilization did not correspond to the observed generation of SB through pretreatment. The pretreated WAS (PWAS) COD fractionations determined from aerobic respirometry were employed in anaerobic modeling and it was concluded that the aerobic and anaerobic biodegradability of PWAS differed. It was found that thermal pretreatment resulted in as much as 50% of the endogenous decay products becoming biodegradable in anaerobic digestion. Overall, it was concluded that the COD fractionation that was developed based upon the aerobic respirometry was valid. However, it was necessary to implement a first-order decay process that reflected changes in the anaerobic biodegradability of the endogenous products through pretreatment.

Resource recovery and circular economy from organic solid waste using aerobic and anaerobic digestion technologies

2020 ◽  
Vol 301 ◽  
pp. 122778 ◽  
Author(s):  
Steven Wainaina ◽  
Mukesh Kumar Awasthi ◽  
Surendra Sarsaiya ◽  
Hongyu Chen ◽  
Ekta Singh ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Solid Waste ◽  
Circular Economy ◽  
Resource Recovery ◽  
Organic Solid Waste ◽  
Organic Solid ◽  
Aerobic And Anaerobic

Aerobic and anaerobic digestion of processed municipal solid waste

1990 ◽  
Vol 24-25 (1) ◽  
pp. 765-771 ◽  
Author(s):  
Todd B. Vinzant ◽  
William S. Adney ◽  
Karel Grohmann ◽  
Christopher J. Rivard
Keyword(s):  
Anaerobic Digestion ◽  
Municipal Solid Waste ◽  
Solid Waste ◽  
Aerobic And Anaerobic

Characterization of sludges for predicting anaerobic digester performance

2008 ◽  
Vol 57 (5) ◽  
pp. 721-726 ◽  
Author(s):  
R. Jones ◽  
W. Parker ◽  
Z. Khan ◽  
S. Murthy ◽  
M. Rupke
Keyword(s):  
Anaerobic Digestion ◽  
Activated Sludge ◽  
Waste Activated Sludge ◽  
Anaerobic Conditions ◽  
Modified Model ◽  
Primary Sludge ◽  
First Order ◽  
Decay Products ◽  
Aerobic And Anaerobic

Batch anaerobic digestion tests of primary sludge and waste activated sludge were conducted for a duration of 123 days to determine the ultimate degradability of the sludges. For primary sludges the inert fraction of the particulate COD that was predicted by the wastewater models could be employed to predict their biodegradability under anaerobic conditions. The degradation of waste activated sludge was adequately characterized for the first 60 days of digestion using a model that assumed equivalent biodegradability of particulate COD components under aerobic and anaerobic conditions. However after 60 days of anaerobic digestion it appeared that decay of the endogenous products was occurring. This could be described with a first order decay function with a coefficient of 0.0075 d−1. For continuous flow digesters operating at SRTs of 30–60 days, the predicted VSS destruction with the modified model was approximately 10% higher than that predicted on the basis of inert endogenous decay products.

Evaluation of the aerobic and anaerobic biodegradability of the antibiotic norfloxacin

2014 ◽  
Vol 70 (2) ◽  
pp. 265-271 ◽  
Author(s):  
Lucilaine Valéria de Souza Santos ◽  
Danusa Campos Teixeira ◽  
Raquel Sampaio Jacob ◽  
Míriam Cristina Santos do Amaral ◽  
Liséte Celina Lange
Keyword(s):  
Anaerobic Digestion ◽  
Industrial Wastewater ◽  
Biological Treatment ◽  
Wastewater Treatment Plants ◽  
Test Organism ◽  
Pharmaceutical Compounds ◽  
Treatment Processes ◽  
Anaerobic Biodegradability ◽  
Aliivibrio Fischeri ◽  
Aerobic And Anaerobic

The purpose of studying the biodegradability of pharmaceutical compounds is to evaluate their behaviors in relation to the treatment processes generally used in domestic and industrial wastewater treatment plants. The antibiotic norfloxacin was found to be a recalcitrant compound. The studies conducted showed norfloxacin removal rates of 12% and 18% when biomasses from treatments with activated sludge and anaerobic biodigesters, respectively, were used without acclimatization. This suggests that anaerobic digestion shows better performance for norfloxacin removal. Ecotoxicological tests, using the luminescent marine bacteria Aliivibrio fischeri as the test organism, show that anaerobic digestion could eliminate the toxicity of the antibiotic norfloxacin, even though total degradation of the drug was not observed. The release of norfloxacin during cell lysis suggests the importance of controlling this phenomenon in biological treatment systems that handle wastewater contaminated with norfloxacin, thus preventing the return of this drug to the environment.

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