scholarly journals Taking Advantage of Waste Heat Resource from Vinasses for Anaerobic Co-digestion of Waste Activated Sludge under the Thermophilic Condition: Energy Balance and Kinetic Analysis

ACS Omega ◽  
2021 ◽  
Author(s):  
Mingqing Tai ◽  
Yafei Tai
Keyword(s):  
Energy Balance ◽  
Activated Sludge ◽  
Kinetic Analysis ◽  
Waste Heat ◽  
Waste Activated Sludge ◽  
Thermophilic Condition

Mesophilic anaerobic co-digestion of waste activated sludge and Egeria densa : Performance assessment and kinetic analysis

2015 ◽  
Vol 148 ◽  
pp. 78-86 ◽  
Author(s):  
Guangyin Zhen ◽  
Xueqin Lu ◽  
Takuro Kobayashi ◽  
Yu-You Li ◽  
Kaiqin Xu ◽  
...  
Keyword(s):  
Activated Sludge ◽  
Kinetic Analysis ◽  
Performance Assessment ◽  
Waste Activated Sludge ◽  
Egeria Densa

The effect of salinity on waste activated sludge alkaline fermentation and kinetic analysis

2016 ◽  
Vol 43 ◽  
pp. 80-90 ◽  
Author(s):  
Baodan Jin ◽  
Shuying Wang ◽  
Liqun Xing ◽  
Baikun Li ◽  
Yongzhen Peng
Keyword(s):  
Activated Sludge ◽  
Kinetic Analysis ◽  
Waste Activated Sludge

Anaerobic treatment to improve sludge recovery at a deinked fiber pulp and paper mill

TAPPI Journal ◽  
2016 ◽  
Vol 15 (2) ◽  
pp. 127-137
Author(s):  
ALEKSANDRA RACˇ ICˇ KOZMUS ◽  
ANDREJA ŽGAJNAR GOTVAJN ◽  
ALEKSANDRA LOBNIK ◽  
NINA NOVAK ◽  
ALJAZ KLASINC ◽  
...  
Keyword(s):  
Energy Balance ◽  
Activated Sludge ◽  
Municipal Wastewater ◽  
Negative Impact ◽  
Positive Impact ◽  
Paper Mill ◽  
Anaerobic Treatment ◽  
Positive Energy ◽  
Waste Activated Sludge ◽  
Treated Effluent

Investigations were conducted to explore the use of anaerobic treatment options that may allow complete recovery of primary and waste activated sludge streams for incineration from a graphic paper mill with an integrated deinked pulp plant. The effective reduction of waste activated sludge quantity (55%–65%) was obtained by the anaerobic treatment of wastewater from the deinked pulp plant or by the anaerobic stabilization of the mill effluent from primary treatment, where chemical oxygen demand (COD) removal efficiency of 67.6% and 64.8%, and biogas potential of 440 and 496 m3/t CODremoved were achieved, respectively. The anaerobic treatment of wastewater and alkali hydrolysis of waste activated sludge decreased the dewatering properties of solids residue in treated effluent resulting in a negative impact on the sludge recovery energy balance. The addition of municipal wastewater to anaerobic treatment in the amount of 18 vol%, representing 10% of the total COD, increased the reduction of waste activated sludge to 78%, with a positive impact on the treatment costs and efficiency. Anaerobic treatment of the studied effluents may enable incineration of all mill sludge with a positive energy balance, a reduction of biological wastewater treatment operational cost by up to 83%, and mill conventional energy demands by up to 2.7%, resulting in total cost savings of up to EUR 5.2 (USD 5.60) per ton of paper.

Thermophilic vs. mesophilic anaerobic digestion of waste activated sludge: Modelling and energy balance for its applicability at a full scale WWTP

2020 ◽  
Vol 156 ◽  
pp. 235-248 ◽  
Author(s):  
Barbara Ruffino ◽  
Alberto Cerutti ◽  
Giuseppe Campo ◽  
Gerardo Scibilia ◽  
Eugenio Lorenzi ◽  
...  
Keyword(s):  
Anaerobic Digestion ◽  
Energy Balance ◽  
Activated Sludge ◽  
Full Scale ◽  
Waste Activated Sludge

Comparison of Aerobic and Anoxic-Aerobic Digestion of Waste Activated Sludge

1985 ◽  
Vol 17 (8) ◽  
pp. 1475-1478 ◽  
Author(s):  
A P. C. Warner ◽  
G. A. Ekama ◽  
G v. R. Marais
Keyword(s):  
Experimental Data ◽  
Activated Sludge ◽  
Waste Activated Sludge ◽  
Activated Sludge Process ◽  
Cycle Times ◽  
Waste Sludge ◽  
Volatile Solids ◽  
In Series ◽  
Flow Through ◽  
Theoretical Simulations

The laboratory scale experimental investigation comprised a 6 day sludge age activated sludge process, the waste sludge of which was fed to a number of digesters operated as follows: single reactor flow through digesters at 4 or 6 days sludge age, under aerobic and anoxic-aerobic conditions (with 1,5 and 4 h cycle times) and 3-in-series flow through aerobic digesters each at 4 days sludge age; all digesters were fed draw-and-fill wise once per day. The general kinetic model for the aerobic activated sludge process set out by Dold et al., (1980) and extended to the anoxic-aerobic process by van Haandel et al., (1981) simulated accurately all the experimental data (Figs 1 to 4) without the need for adjusting the kinetic constants. Both theoretical simulations and experimental data indicate that (i) the rate of volatile solids destruction is not affected by the incorporation of anoxic cycles and (ii) the specific denitrification rate is independent of sludge age and is K4T = 0,046(l,029)(T-20) mgNO3-N/(mg active VSS. d) i.e. about 2/3 of that in the secondary anoxic of the single sludge activated sludge stystem. An important consequence of (i) and (ii) above is that denitrification can be integrated easily in the steady state digester model of Marais and Ekama (1976) and used for design (Warner et al., 1983).

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