Outdoor cultures of Chlorella pyrenoidosa in the effluent of anaerobically digested activated sludge: The effects of pH and free ammonia

2016 ◽  
Vol 200 ◽  
pp. 606-615 ◽  
Author(s):  
Xiao-Bo Tan ◽  
Ya-Lei Zhang ◽  
Li-Bin Yang ◽  
Hua-Qiang Chu ◽  
Jun Guo
Keyword(s):  
Activated Sludge ◽  
Chlorella Pyrenoidosa ◽  
Free Ammonia ◽  
Effects Of Ph ◽  
Outdoor Cultures

Free ammonia-based pretreatment enhances phosphorus release and recovery from waste activated sludge

Chemosphere ◽  
2018 ◽  
Vol 213 ◽  
pp. 276-284 ◽  
Author(s):  
Qiuxiang Xu ◽  
Xuran Liu ◽  
Dongbo Wang ◽  
Yanxin Wu ◽  
Qilin Wang ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Phosphorus Release ◽  
Free Ammonia ◽  
Waste Activated Sludge

Long-Term Effect of Free Ammonia on Biological Nitrification in Activated Sludge

2019 ◽  
Vol 13 (5) ◽  
pp. 703-710 ◽  
Author(s):  
Su Xiao ◽  
Ouyang Fan ◽  
Qi Li ◽  
Zhai Hongyan ◽  
Ji Min
Keyword(s):  
Activated Sludge ◽  
Term Effect ◽  
Free Ammonia ◽  
Long Term Effect ◽  
Biological Nitrification

Effect of physical and culture conditions on uptake of cadmium by Chlorella pyrenoidosa

1980 ◽  
Vol 31 (6) ◽  
pp. 747 ◽  
Author(s):  
JF Gipps ◽  
BAW Coller
Keyword(s):  
Cell Wall ◽  
Ion Exchange ◽  
Cell Membrane ◽  
Chlorella Pyrenoidosa ◽  
Culture Conditions ◽  
Algal Suspension ◽  
Effects Of Ph ◽  
Two Phases

The effects of pH, temperature, concentrations of Cd2+ and P43-, and density of algal suspension on the uptake of cadmium by C.pyrenoidosa were studied. Uptake occurred in at least two phases: fast (8 min) and slow (24 h). The slow uptake was dependent on pH (greater at pH 8.0 than 6.5) and temperature (faster at 25 than 4�C) whereas the fast uptake was not. Both phases of uptake were affected by the density of the algal suspension. Dependence on the concentration of Cd2+, at pH 8.0, was limited by the concentration of PO43- and also possibly by the concentration of CO3-2. Results were generally consistent with the model of initial ion-exchange uptake onto the cell wall and much slower transport across the cell membrane.

Effect of blending landfill leachate with activated sludge on the domestic wastewater treatment process

2019 ◽  
Vol 5 (2) ◽  
pp. 268-276 ◽  
Author(s):  
Min Zheng ◽  
Siqi Li ◽  
Qian Dong ◽  
Xia Huang ◽  
Yanchen Liu
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
Landfill Leachate ◽  
Treatment Process ◽  
Domestic Wastewater ◽  
Free Ammonia ◽  
Wastewater Treatment Process ◽  
Domestic Wastewater Treatment ◽  
High Level ◽  
Ammonia Exposure

A sludge contact is proposed to form high-level free ammonia exposure for co-treatment of landfill leachate with domestic wastewater.

Study of kinetics of degradation of cyclohexane carboxylic acid by acclimated activated sludge

2016 ◽  
Vol 73 (10) ◽  
pp. 2552-2558 ◽  
Author(s):  
Chunhua Wang ◽  
Shuian Shi ◽  
Hongyan Chen
Keyword(s):  
Carboxylic Acid ◽  
Activated Sludge ◽  
Degradation Kinetics ◽  
Experimental Conditions ◽  
First Order Kinetics ◽  
Effects Of Ph ◽  
High Concentrations ◽  
Cyclohexane Carboxylic Acid ◽  
Kinetics Of ◽  
Acclimated Activated Sludge

Activated sludge contains complex microorganisms, which are highly effective biodegrading agents. In this study, the kinetics of biodegradation of cyclohexane carboxylic acid (CHCA) by an acclimated aerobic activated sludge were investigated. The results showed that after 180 days of acclimation, the activated sludge could steadily degrade >90% of the CHCA in 120 h. The degradation of CHCA by the acclimated activated sludge could be modeled using a first-order kinetics equation. The equations for the degradation kinetics for different initial CHCA concentrations were also obtained. The kinetics constant, kd, decreased with an increase in the CHCA concentration, indicating that, at high concentrations, CHCA had an inhibiting effect on the microorganisms in the activated sludge. The effects of pH on the degradation kinetics of CHCA were also investigated. The results showed that a pH of 10 afforded the highest degradation rate, indicating that basic conditions significantly promoted the degradation of CHCA. Moreover, it was found that the degradation efficiency for CHCA increased with an increase in temperature and concentration of dissolved oxygen under the experimental conditions.

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