GAOLi-juan,PENGJun,WANGYi,et al.Comparison of Mesophilic and Thermophilic Anaerobic Digestion Characteristics of Sludge from Typical BNR Process[J].China Water & Wastewater,2024,40(3):107-112.
Comparison of Mesophilic and Thermophilic Anaerobic Digestion Characteristics of Sludge from Typical BNR Process
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第3期
Page:
107-112
Column:
Date of publication:
2024-02-01
- Abstract:
- Focusing on a large amount of sludge produced in the biological nutrient removal (BNR) processes of municipal wastewater treatment plants in China, this paper investigated the characteristics of hydrolysis, gas production and reduction of sludge from two typical BNR processes (oxidation ditch and A/A/O process) during mesophilic [(36±1) ℃] anaerobic digestion (MAD) and thermophilic [(52±1) ℃] anaerobic digestion (TAD). Under MAD and TAD conditions, both the maximum speci-c methane production rate (Rmax) and the maximum methane production potential (P0) of sludge from oxidation ditch were significantly lower than those of sludge from A/A/O process, and the digestion time was longer. In addition, TAD significantly increased the Rmax and P0 of sludge from BNR process and shortened the digestion time. For example, the Rmax, P0 and digestion time of sludge from oxidation ditch in TAD were 2.47 times, 1.33 times and 53.8% of that in MAD, respectively. TAD significantly improved the organic degradation rate of sludge from BNR process, which met the requirements of sludge organic degradation rate specified in Guideline on Best Available Technologies of Pollution Prevention and Control for Treatment and Disposal of Sludge from Municipal Wastewater Treatment Plant (on Trial) (HJ-BAT-002).
Last Update:
2024-02-01