Specimen and aggregate size effect on the dynamic fracture parameters of concrete under high loading rates

2021 ◽  
pp. 108184
Author(s):  
Masoud Rezaei ◽  
Mohsen A. Issa
Keyword(s):  
Size Effect ◽  
Dynamic Fracture ◽  
Aggregate Size ◽  
High Loading ◽  
Loading Rates ◽  
Fracture Parameters

Promoting sludge quantity and activity results in high loading rates in Anammox UBF

2010 ◽  
Vol 101 (8) ◽  
pp. 2700-2705 ◽  
Author(s):  
Jianwei Chen ◽  
Ping Zheng ◽  
Yi Yu ◽  
Chongjian Tang ◽  
Qaisar Mahmood
Keyword(s):  
High Loading ◽  
Loading Rates

Dairy Waste Treatment with Anaerobic Stationary Fixed Film Reactors

1983 ◽  
Vol 15 (8-9) ◽  
pp. 359-368 ◽  
Author(s):  
L van den Berg ◽  
K J Kennedy
Keyword(s):  
Cheese Whey ◽  
Loading Rate ◽  
Cod Removal ◽  
High Loading ◽  
Loading Rates ◽  
Dairy Wastes ◽  
Plant Waste ◽  
Fixed Film ◽  
Dairy Plant ◽  
Removal Efficiencies

Cheese whey and a dilute waste from a cheese factory with a Chemical Oxygen Demand of 66,000 and 4,000 mg (COD)/L respectively, were treated at high loading rates in 0.7 to 1.2 L downflow anaerobic stationary fixed film reactors and an upflow sludge bed reactor. In downflow stationary fixed film reactors treating cheese whey, COD removal efficiencies of 97% were achieved at a loading rate of 5 kg COD/m3/day and 92% at a maximum loading rate of 22 kg COD/m3/day. With dairy plant waste, loading rates of up to 15 kg COD/m3/day were possible with COD removal efficiencies averaging 75%, decreasing slightly with increasing loading rates. In an upflow sludge bed reactor the COD removal efficiency of dairy plant waste, decreased from 87% at 5 kg COD/m3/day to 73% at 15 kg COD/m3/day. A stationary fixed film reactor treating a skim milk powder waste (4,000 ppm) could only be operated at up to 10 kg COD/m3/day with a treatment efficiency of 72%. Methane was produced from all wastes at rates corresponding to 0.32 m3 CH4 (0°C, 1 atm) per kg COD removed. Results show that stationary fixed film reactors are capable of treating dairy wastes at high loading rates and high COD removal efficiencies.

scholarly journals Formation and Stability of Nitrifying Granules under High Loading Rates

2016 ◽  
Vol 96 ◽  
pp. 12-20
Author(s):  
Yan-ping Wang ◽  
◽  
Fang-yuan Chen ◽  
Jing-lu Nie ◽  
Ping Ning
Keyword(s):  
High Loading ◽  
Loading Rates
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