anaerobically digested sludge
Recently Published Documents





Fuel ◽  
2022 ◽  
Vol 314 ◽  
pp. 123091
Daegi Kim ◽  
Gabin Kim ◽  
Doo Young Oh ◽  
Kee-Won Seong ◽  
Ki Young Park

2021 ◽  
Vol 205 ◽  
pp. 117665
Zhiyao Wang ◽  
Tao Liu ◽  
Haoran Duan ◽  
Yarong Song ◽  
Xi Lu ◽  

2021 ◽  
Vol 321 ◽  
pp. 128893
Chen Cai ◽  
Chongliang Hu ◽  
Wan Yang ◽  
Yu Hua ◽  
Lei Li ◽  

2021 ◽  
Vol 171 ◽  
pp. 105657
Shun Zhang ◽  
Shiyu Miao ◽  
Xiaoqiang An ◽  
Huachun Lan ◽  
Ruiping Liu ◽  

Jiaqi Zhao ◽  
Chunsheng Qiu ◽  
Xiaodan Fan ◽  
Jinxin Zheng ◽  
Nannan Liu ◽  

Abstract The dewatered sewage sludge (DSS) and anaerobically digested sludge (ADS) were pyrolyzed at 550 °C to investigate the characteristics of derived biochar and evaluate the risk of heavy metals (Cr, Ni, Cu, As, Cd, and Pb). The results showed that the pH value of the biochar derived from DSS (DSS-C) was slightly lower than that of the biochar derived from ADS (ADS-C), while DSS-C presented relatively higher specific surface area and total pore volume. DSS-C also showed higher H/C and lower O/C ratios than ADS-C, indicating a higher aromatic condensation and a lower polarity. And the total concentrations of Cr, Ni, Cu, As, Cd, and Pb in DSS and ADS increased significantly after pyrolysis owing to the thermal decomposition of organic matter in the sludge, with corresponding rise of the Nemerow pollution index (NPI) of the biochars compared with the raw sludge. In addition, the sequential extraction procedure (BCR) analysis revealed that pyrolysis process promoted the transformation of heavy metals from bio-available fractions to stable fractions. The potential environmental risk of heavy metals decreased from moderate and extremely high level in the DSS and ADS to low risk and moderate level in DSS-C and ADS-C after pyrolysis, respectively.

2021 ◽  
pp. 117211
Zhiyao Wang ◽  
Gaofeng Ni ◽  
Jun Xia ◽  
Yarong Song ◽  
Shihu Hu ◽  

2021 ◽  
Vol 625 ◽  
pp. 119176
Minh T. Vu ◽  
Luong N. Nguyen ◽  
Md Abu Hasan Johir ◽  
Xiwang Zhang ◽  
Long D. Nghiem ◽  

Sign in / Sign up

Export Citation Format

Share Document