Bioleaching Approach for Enhancing Sewage Sludge Dewaterability

2022 ◽  
pp. 51-69
Author(s):  
Subhashisa Praharaj ◽  
Sagar Maitra ◽  
Akbar Hossain ◽  
Lalichetti Sagar ◽  
Ajar Nath Yadav ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Sludge Dewaterability

Enhancement of the sewage sludge dewaterability by using ethanol and Fe(III)-rice husk

2020 ◽  
Vol 27 (8) ◽  
pp. 8696-8706 ◽  
Author(s):  
Lei Chen ◽  
Qiao Xiong ◽  
He Li ◽  
Haobo Hou ◽  
Min Zhou
Keyword(s):  
Sewage Sludge ◽  
Rice Husk ◽  
Sludge Dewaterability

Insights into the effects of acidification on sewage sludge dewaterability through pH repeated adjustment

Chemosphere ◽  
2019 ◽  
Vol 227 ◽  
pp. 269-276 ◽  
Author(s):  
Hua Wei ◽  
Yunong Tang ◽  
Aimin Li ◽  
Hu Yang
Keyword(s):  
Sewage Sludge ◽  
Sludge Dewaterability

scholarly journals Improvement of sewage sludge dewaterability by bioleaching in a continuous plug flow bioreactor: optimization of process parameters

2018 ◽  
Vol 77 (8) ◽  
pp. 1979-1989 ◽  
Author(s):  
Jingqing Gao ◽  
Na Ma ◽  
Linshuai Li ◽  
Songfeng Zhu ◽  
Yonghong Li ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Moisture Content ◽  
Plug Flow ◽  
Aeration Rate ◽  
Acidithiobacillus Thiooxidans ◽  
Optimization Of Process Parameters ◽  
Working Volume ◽  
Sludge Cake ◽  
Sludge Dewaterability ◽  
The Impact

Abstract A novel process for sewage sludge bioleaching by mixed Thiobacilli (Acidithiobacillus thiooxidans and Acidithiobacillus ferrooxidans) using a 12-stage, 180 L working volume continuous plug-flow bioreactor, is presented. The objective of the present study was to assess the impact of some parameters on the sludge dewaterability and to improve the sludge dewaterability by optimization of these parameters. The parameters examined were sludge moisture content, nutrients dosage, aeration rate, and the number of reactors. The order of the influence of these factors on sludge dewaterability was found to be sludge moisture content > nutrients dosage > aeration rate > number of reactors. The optimized conditions were: sludge moisture content, 98.0%, nutrients dosage, 9 g/L, aeration rate, 8 m3/h, and 10 reactors. Confirmation experiments conducted under optimum conditions demonstrate the sludge dewaterability to be remarkably improved. After 2 days of bioleaching, the moisture of bioleached sludge cake was reduced to below 60%.

Improvement of sewage sludge dewaterability and immobilization of the heavy metals by using pretreated steel slag

2020 ◽  
Vol 182 ◽  
pp. 135-143
Author(s):  
Sha Wan ◽  
Yi Han ◽  
Min Zhou ◽  
Xian Zhou ◽  
Yuchi Chen ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Steel Slag ◽  
Sludge Dewaterability

scholarly journals Influence of Persulfate on Transformation of Phosphorus and Heavy Metals for Improving Sewage Sludge Dewaterability by Hydrothermal Treatment

2021 ◽  
Author(s):  
Qiao Xiong ◽  
Jing Xia ◽  
Xiang Wu ◽  
Xu Wu ◽  
Haobo Hou ◽  
...  
Keyword(s):  
Heavy Metals ◽  
Sewage Sludge ◽  
Hydrothermal Treatment ◽  
Hydrothermal Process ◽  
Treatment Technique ◽  
Capillary Suction ◽  
Hydrothermal Temperature ◽  
Persulfate Oxidation ◽  
Sludge Dewaterability ◽  
Temperature Time

Abstract Activated persulfate oxidation has been proven to be an efficient advanced sludge treatment technique to improve sludge dewaterability. This study investigates the influence of persulfate on the transformation of phosphorus (P) and heavy metals (HMs) during the hydrothermal treatment of sewage sludge. The hydrothermal temperature, time, and persulfate concentration are optimized by a Box-Behnken design to obtain the best sludge dewaterability, which is expressed by capillary suction time (CST). The highest CST reduction efficiency is 90.5% at the optimal hydrothermal temperature, time and concentration of persulfate, which are 145 °C, 2 h, and 150 mg/g DS, respectively. The distribution and transformation of P and HMs with different persulfate concentrations (100-200 mg/g DS) during the hydrothermal process are investigated. Results show that more than 90% of the P and HMs in the sludge are retained in sludge cakes after the hydrothermal treatment. The addition of SPS can make the P in the sludge cakes transform into more stable P species according to the extraction capacity of sequential extracts. It can be found from the ecological risk indexes of the HMs that the addition of SPS during the hydrothermal treatment of sludge can reduce the environmental risk of HMs. This study provides insights into the P and HM distribution and transformation during hydrothermal treatment with persulfate, providing a reference for sludge recovery strategies.

Feasibility of bioleaching combined with Fenton oxidation to improve sewage sludge dewaterability

2015 ◽  
Vol 28 ◽  
pp. 37-42 ◽  
Author(s):  
Changgeng Liu ◽  
Panyue Zhang ◽  
Chenghua Zeng ◽  
Guangming Zeng ◽  
Guoyin Xu ◽  
...  
Keyword(s):  
Sewage Sludge ◽  
Fenton Oxidation ◽  
Sludge Dewaterability
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