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| Effect of phosphorus deficiency stress on aerobic sludge granulation system |
| Received:March 29, 2016 |
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| KeyWord:sequencing batch reactor, aerobic granular sludge, livestock, slurries, phosphorus |
| Author Name | Affiliation | E-mail | | GUO Shuo | School of Forestry, Northeast Forestry University, Harbin 150040, China
Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China | | | GAO Da-wen | School of Forestry, Northeast Forestry University, Harbin 150040, China | dawengao@gmail.com | | LIU Lin | Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China | | | LIU Chao-xiang | Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China | cxliu@iue.ac.cn | | HUANG Ling-bo | The Ltd of Xiamen Steve Ecotechnology, Xiamen 361000, China | |
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| Abstract: |
| In order to evaluate the effect of phosphorus residues from phosphorus recycle system outlet on further biological nitrogen removal system, this study focused on the influence of phosphorus deficiency on aerobic granular system(Sequencing Batch Reactor) operation efficiency and stability, by using livestock slurries as influent. During the stable system of the aerobic granular system, the results showed that the ratio of MLVSS/MLSS under the conditions of deficient phosphorus and sufficient phosphorus in influent are 94%±4% and 92%±2%, it indicated that microorganisms in these two system had good biological activity. However, phosphorus deficiency may result in low stability of microorganism aggregation, The Zeta potential is(-7.37±1.23) mV with the phosphorus sufficient reactor and(-10.5±1.27) mV with the phosphorus deficient reactor. In addition, the specific removal rates of ammonia and COD in phosphorus deficient reactor and sufficient phosphorus reactor are(110.03±0.48) mg NH4+-N·g-1 VSS·c-1 and(132.23±0.31) mg NH4+-N·g-1 VSS·c-1, 117.64±0.08 mg COD·g-1 VSS·c-1 and 150.43±0.13 mg COD·g-1 VSS·c-1, respectively, it indicates that granular system had high removal rate of organic matter and nitrogen under phosphorus sufficient situation. Therefore, during the process of livestock slurries treatment utilizing aerobic granular sludge technology, optimization settings of chemical phosphorus removal should take the influence of outlet concentration of phosphorus on subsequent stability of biological treatment into consideration, making sure the removal efficiency of organic matter and nitrogen and stability of system by utilizing integration process. |
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