Zhao Yong-Gui, Huang Jun, Yang Hu
Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China.
Huan Jing Ke Xue. 2011 Nov;32(11):3405-11.
In a 4 L reactor, aerobic granular sludge was cultured with piggery wastewater with glucose and ammonium sulfate as the additional carbon and nitrogen sources, respectively. No exotic activated sludge was inoculated, and activated carbon powder was used to immobilize the indigenous microorganisms of wastewater in the set-up period. The reaction was conducted under controlled conditions of progressively increasing COD and NH4(+)-N loading rates, decreasing settlement time, and enhancing aeration. The resulted aerobic granular sludge was capable of simultaneous COD and nitrogen removal. The performance (COD and NH4(+)-N removal efficiencies) and characteristics of aerobic granules at high loading rates were investigated. The mature aerobic granular sludge was brown-yellow, and took an irregular spherical shape with a diameter of 0.5-3.5 mm. Under the COD loading rates of 4.80-12.6 kg x (m3 x d)(-1) and NH4(+)-N loading rates of 0.217-0.503 kg x (m3 x d)(-1), the removal efficiencies of COD and NH:4(+)-N were greater than 94% and 98%, respectively. When the COD and NH4(+)-N loading rates reached 15.7 kg x (m3 x d)(-1) and 0.723 kg x (m3 x d) (-1), respectively, the floc sludge grew quickly, and the granules disaggregated. The removal efficiency of NH4(+)-N decreased to 81.6% in four days. Yet the removal efficiency of NH4(+)-N returned to higher than 98% when the sludge was partially removed and the loading rates were reduced. The aerobic granules cultured in this study exhibited excellent abilities of simultaneous COD and nitrogen removal, and resistance to simultaneous shock of high COD and NH4(+)-N loading rates.
在一个4升的反应器中，以猪场废水为培养基，分别添加葡萄糖和硫酸铵作为额外的碳源和氮源，培养好氧颗粒污泥。未接种外来活性污泥，在启动阶段使用活性炭粉末固定废水中的土著微生物。反应在逐步提高化学需氧量（COD）和铵态氮（NH₄⁺-N）负荷率、缩短沉降时间和增强曝气的控制条件下进行。所得好氧颗粒污泥能够同时去除COD和氮。研究了高负荷率下好氧颗粒的性能（COD和NH₄⁺-N去除效率）和特性。成熟的好氧颗粒污泥呈棕黄色，形状不规则，为球形，直径为0.5 - 3.5毫米。在COD负荷率为4.80 - 12.6千克·（立方米·天）⁻¹和NH₄⁺-N负荷率为0.217 - 0.503千克·（立方米·天）⁻¹的条件下，COD和NH₄⁺-N的去除效率分别大于94%和98%。当COD和NH₄⁺-N负荷率分别达到15.7千克·（立方米·天）⁻¹和0.723千克·（立方米·天）⁻¹时，絮状污泥迅速生长，颗粒解体。四天内NH₄⁺-N的去除效率降至81.6%。然而，当部分污泥被去除且负荷率降低时，NH₄⁺-N的去除效率恢复到高于98%。本研究培养的好氧颗粒表现出优异的同时去除COD和氮的能力，以及对高COD和NH₄⁺-N负荷率同时冲击的抗性。
