The Effect of Aerobic and Anaerobic Digestion on Eggs of Ascaris Lumbricoides Var. Suum in Night-Soil

1963 ◽  
Vol 12 (1) ◽  
pp. 46-55 ◽  
Author(s):  
W. L. Reyes ◽  
C. W. Krusé ◽  
M. St.C. Batson
Keyword(s):  
Anaerobic Digestion ◽  
Ascaris Lumbricoides ◽  
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.

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

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.

Inactivation of E. coli and helminth eggs in aerobic and anaerobic effluents using UV radiation

2003 ◽  
Vol 47 (9) ◽  
pp. 185-192 ◽  
Author(s):  
C.A. de Lemos Chernicharo ◽  
J.C. de Castro Silva ◽  
A.M. Zerbini ◽  
V.M. Godinho
Keyword(s):  
Uv Radiation ◽  
Ascaris Lumbricoides ◽  
Uasb Reactor ◽  
Mercury Lamp ◽  
Trickling Filter ◽  
Excellent Performance ◽  
E Coli ◽  
Helminth Eggs ◽  
Aerobic And Anaerobic ◽  
Very High

This paper evaluates the performance of a simplified bench-scale UV-photoreactor used to inactivate Escherichia coli and eggs of Ascaris lumbricoides. The photoreactor consisted of a tubular unit constructed with PVC tube, 100 mm diameter and 45 cm total height, with a low-pressure mercury lamp adapted in the centre of the tube. The reactor was tested to disinfect the effluents from a trickling filter and from an UASB reactor, both fed with domestic sewage. The results showed an excellent performance of the photoreactor, with very high E. coli inactivation efficiencies being observed for the aerobic effluent (in the range of 4 to 5 log-units, for doses varying from 50.7 to 13.6 mW.s.cm−2) and also for the effluent from the UASB reactor (usually above 4 log-units, for doses of 20.3 and 13.6 mW.s.cm−2). In relation to the inactivation of helminth eggs, it was observed that UV radiation significantly affected the development of eggs of Ascaris lumbricoides, with the better results being obtained for radiation times of 40 and 60 seconds (doses of 13.6 and 20.3 mW.s.cm−2, respectively), when approximately 65% of the eggs remained in the stage of single cell and only 9 to 10% were able to fully develop to the stage of motile larva.

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