The role of beneficial microorganisms in an anoxic-oxic (AO) process for treatment of ammonium-rich landfill leachates: Nitrogen removal and excess sludge reduction

2021 ◽  
Vol 9 (4) ◽  
pp. 105188
Author(s):  
Yu Cheng ◽  
Kangmin Chon ◽  
Xianghao Ren ◽  
Yingying Kou ◽  
Yan Wu ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Landfill Leachates ◽  
Beneficial Microorganisms ◽  
Excess Sludge Reduction

Evaluation of Sludge Reduction Mechanisms in ‘Sonolysis-Cryptic Growth’ Wastewater Treatment System

2015 ◽  
Vol 768 ◽  
pp. 108-115
Author(s):  
Pan Yue Zhang ◽  
Tian Wan ◽  
Guang Ming Zhang
Keyword(s):  
Wastewater Treatment ◽  
Organic Load ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Operation Condition ◽  
Reduction Mechanisms ◽  
Residual Sludge ◽  
Cryptic Growth ◽  
Load Increase

‘Sonication - cryptic growth’ technology can reduce 30-80% excess sludge in wastewater treatment systems. Various mechanisms contribute to the sludge reduction but the role of each one is unclear. This paper quantitatively studied the potential mechanisms in ‘sonication - cryptic growth’. The operation condition was: every day 20% sludge was sonicated under 1.2 Wml-1 for 15 min and then returned to the wastewater treatment reactor for cryptic growth. The results showed that under such conditions, ‘sonication - cryptic growth’ reduced the excess sludge by 57.3% and the effluent met the national discharge standard. Multiple mechanisms were involved in the process. Detailed analysis showed that the ‘lysis-cryptic growth’ mechanism was the most important one and accounted for 49.1% of sludge reduction. Biodegradation of residual sludge was the second important one and contributed 19.5%. Other potential mechanisms included the altered microbial community, longer sludge retention time, and accumulation of persistent materials. But organic load increase had virtually no impact.

MBR excess sludge reduction by combination of electrocoagulation and Fenton oxidation processes

2013 ◽  
Vol 120 ◽  
pp. 378-385 ◽  
Author(s):  
Mohammad Alizadeh Fard ◽  
Behnoush Aminzadeh ◽  
Mansoor Taheri ◽  
Sajjad Farhadi ◽  
Mostafa Maghsoodi
Keyword(s):  
Fenton Oxidation ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Oxidation Processes ◽  
Excess Sludge Reduction

scholarly journals Biological excess sludge reduction in adsorption/bio-oxidation process by enhancing predators' growth

2020 ◽  
Vol 9 (1) ◽  
pp. 2
Author(s):  
MohammadMehdi Amin ◽  
Somayeh Kheiri ◽  
Ensiyeh Taheri ◽  
Nasim Rafiei ◽  
Ali Fatehizadeh ◽  
...  
Keyword(s):  
Oxidation Process ◽  
Sludge Reduction ◽  
Excess Sludge ◽  
Excess Sludge Reduction
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