ZHUWei,ZHANGJing,YOUHong-kun,et al.Preparation of Sludge and Coal Gangue Based Activated Carbon and Its Promotion to Anammox[J].China Water & Wastewater,2024,40(7):113-118.
Preparation of Sludge and Coal Gangue Based Activated Carbon and Its Promotion to Anammox
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第40卷
Number:
第7期
Page:
113-118
Column:
Date of publication:
2024-04-01
- Keywords:
- sludge; coal gangue; activated carbon; Anammox; removal of nitrogen
- Abstract:
- This paper prepared the sludge and coal gangue based activated carbon (SCAC) by using sludge and coal gangue as raw materials, and investigated its influence of serving as immobilized carrier on the operation of Anammox reactor. SCAC of 1.0 g was added to the reactor with an effective volume of 450 mL. After 45 days of operation, the removal rates of NH4+-N and NO2--N reached 94% and 99%, respectively, and the stoichiometric ratio (ΔNH4+-N∶ΔNO2--N∶ΔNO3--N=1∶1.40∶0.25) was closer to the theoretical value. In addition, the operating stability was obviously better than that of the control group, and the nitrogen removal performance was significantly enhanced. After 100 days of operation, the EPS content increased by 25 mg/gVSS, of which the protein (PN) content almost doubled, the polysaccharide (PS) content did not change much, and the PN/PS almost doubled. In addition, the microbial hydrophobicity was enhanced, which was conducive to reducing the loss of microorganisms. According to the results of scanning electron microscopy (SEM), specific surface area test and Fourier infrared spectroscopy (FTIR) characterization, the BET specific surface area of SCAC was 146.25 m2/g, the average pore size was 2.75 nm, and the structure was mainly in the form of microporous or mesoporous spongy, which was conducive to the attached growth of microorganisms. The oxygen-containing functional groups such as carbonyl group and carboxyl group on the surface of SCAC promoted the secretion of EPS, increased the biomass, and enhanced the load impact resistance of the Anammox reactor.
Last Update:
2024-04-01