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.
污泥-煤矸石基活性炭的制备及对Anammox的促进
- Title:
- Preparation of Sludge and Coal Gangue Based Activated Carbon and Its Promotion to Anammox
- Keywords:
- sludge; coal gangue; activated carbon; Anammox; removal of nitrogen
- 摘要:
- 以污泥与煤矸石为原料制备污泥-煤矸石基活性炭（SCAC），探究其作为固定化载体对厌氧氨氧化（Anammox）反应器运行过程的影响。结果表明，向有效容积为450 mL的反应器投加1.0 g SCAC，运行45 d后，NH4+-N和NO2--N去除率分别达到94%和99%，化学计量比（ΔNH4+-N∶ΔNO2--N∶ΔNO3--N=1∶1.40∶0.25）与理论值更接近，运行稳定性明显优于对照组，脱氮性能显著增强；运行100 d后，测得EPS含量增加了约25 mg/gVSS，其中蛋白质（PN）含量增加了近1倍，多糖（PS）含量变化不大，PN/PS值提升了近1倍，微生物疏水性增强，有利于减少微生物流失。通过扫描电子显微镜（SEM）、比表面积测定、傅里叶红外光谱（FTIR）表征，SCAC的BET比表面积为146.25 m2/g，平均孔径为2.75 nm，主要为微孔介孔海绵状形态，此结构有利于微生物附着；其表面的羰基、羧基等含氧官能团可促进EPS的分泌，提高生物量，提升Anammox反应器的抗负荷冲击能力。
- 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.
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