Wu Changyong, Zhou Yuexi, Song Jiamei
State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China E-mail:
Research Center of Water Pollution Control Technology, Chinese Research Academy of Environment Sciences, Beijing 100012, China.
Water Sci Technol. 2016;73(10):2324-31. doi: 10.2166/wst.2016.080.
A sequencing batch reactor was used to investigate the effect of carbon sources on the metabolism of activated sludge. Acetate and phenol, with the chemical oxygen demand (COD) of 330-350 mg L(-1), was used as the carbon source in Periods I and II, respectively. Acetate decreased in the initial 120 min with the intracellular storage materials (XSTO), extracellular polymeric substances (EPS), and the soluble microbial products (SMP) accumulating to 131.0 mg L(-1), 347.5 mg L(-1), and 35.5 mg L(-1), respectively. Then, XSTO and EPS decreased to 124.5 mg L(-1) and 340.0 mg L(-1), respectively, in the following 120 min. When acetate was replaced by phenol, it could not be used at the beginning due to its toxicity. The XSTO decreased from 142 mg L(-1) to 54.6 mg L(-1) during the aeration period. The EPS had a significant increase, with the highest value of 618.1 mg L(-1), which then decreased to 245.6 mg L(-1) at 240 min. The phenol was gradually degraded with the acclimation and it can be fully degraded 18 d later. Meanwhile, the usage ratio of the internal carbon source decreased. The effluent SMP in Period II was 1.7 times that in Period I.
采用序批式反应器研究碳源对活性污泥代谢的影响。在第一阶段和第二阶段，分别使用化学需氧量（COD）为330 - 350 mg L(-1)的醋酸盐和苯酚作为碳源。醋酸盐在最初的120分钟内减少，细胞内储存物质（XSTO）、胞外聚合物（EPS）和可溶性微生物产物（SMP）分别积累至131.0 mg L(-1)、347.5 mg L(-1)和35.5 mg L(-1)。然后，在接下来的120分钟内，XSTO和EPS分别降至124.5 mg L(-1)和340.0 mg L(-1)。当醋酸盐被苯酚取代时，由于其毒性，苯酚在开始时无法被利用。在曝气期间，XSTO从142 mg L(-1)降至54.6 mg L(-1)。EPS显著增加，最高值达到618.1 mg L(-1)，然后在240分钟时降至245.6 mg L(-1)。随着驯化，苯酚逐渐降解，18天后可完全降解。同时，内部碳源的利用率降低。第二阶段的出水SMP是第一阶段的1.7倍。
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