In-situ sludge reduction performance and mechanism in an anoxic/aerobic process coupled with alternating aerobic/anaerobic side-stream reactor

2021 ◽  
pp. 145856
Author(s):  
Cheng Cheng ◽  
Jinju Geng ◽  
Haidong Hu ◽  
Yihan Shi ◽  
Rongwei Gao ◽  
...  
Keyword(s):  
Sludge Reduction ◽  
Side Stream ◽  
Aerobic Process ◽  
Performance And Mechanism

Peroxydisulfate activation by in-situ synthesized Fe3O4 nanoparticles for degradation of atrazine: Performance and mechanism

2020 ◽  
Vol 247 ◽  
pp. 116925 ◽  
Author(s):  
Ramazan Keyikoglu ◽  
Okan Karatas ◽  
Alireza Khataee ◽  
Mehmet Kobya ◽  
Orhan Taner Can ◽  
...  
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Performance And Mechanism

scholarly journals The effects of a full-scale anaerobic side-stream reactor on sludge decay and biomass activity

2019 ◽  
Vol 79 (6) ◽  
pp. 1081-1091 ◽  
Author(s):  
V. F. Velho ◽  
G. Andreottola ◽  
P. Foladori ◽  
R. H. R. Costa
Keyword(s):  
Activated Sludge ◽  
Mass Balance ◽  
Oxygen Demand ◽  
Full Scale ◽  
Sludge Reduction ◽  
Solid Mass ◽  
Anaerobic Conditions ◽  
Side Stream ◽  
Biomass Activity ◽  
Heterotrophic Biomass

Abstract A full-scale anaerobic side-stream reactor (ASSR) for sludge reduction was monitored in terms of sludge production and compared with the previous conventional activated sludge configuration (CAS). A detailed solid mass balance was calculated on the whole full-scale plant to estimate the sludge reduction associated with the ASSR. The activity of the biomass, which undergoes alternation of aerobic and anaerobic conditions, was investigated by the respirometric test. The ASSR promoted a reduction of heterotrophic biomass activity and the substrate consumption rate in the activated sludge implemented with ASSR (AS + ASSR) was 36% smaller than in the CAS period. The solid mass balance indicated a sludge reduction of 28%. During the 270-day operation, the observed sludge yield passed from 0.438 kgTSS/kgCOD in the CAS to 0.315 in the AS + ASSR configuration. The solubilization of chemical oxygen demand (COD), NH4+-N and orthophosphate were verified under anaerobic conditions. The results suggest that the possible mechanisms of sludge reduction were the increase of the system sludge retention time (SRT) by ASSR addition, and the reduction in heterotrophic biomass activity added to the organic compounds' hydrolysis.

Investigation of sludge reduction and biogas generation in high-rate anaerobic side-stream reactors for wastewater treatment

2018 ◽  
Vol 4 (11) ◽  
pp. 1829-1838 ◽  
Author(s):  
Chul Park ◽  
Dong-Hyun Chon ◽  
Aaron Brennan ◽  
Heonseop Eom
Keyword(s):  
Wastewater Treatment ◽  
Activated Sludge ◽  
High Rate ◽  
Sludge Reduction ◽  
Waste Sludge ◽  
Side Stream ◽  
Activated Sludge Systems ◽  
Sludge Production

Activated sludge systems incorporating a 2 day anaerobic side-stream reactor (ASSR) show significantly decreased waste sludge production.

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