摘要
以厌氧/好氧交替运行的SBR系统为研究对象,母反应器运行温度控制在15℃,采用实际生活污水,考察了温度(5、10、20、25、30、35℃)对EBPR系统的冲击影响。结果表明,温度较低(〈10℃)情况下,由于对微生物生理活性产生抑制而使系统除磷效率大幅度下降,由20℃时出水磷浓度为0 mg.L-1升高至5℃时的6.95 mg.L-1,而且胞内聚合物PHB的降解量下降,使系统内PHB处于累积状态。温度较高(25~30℃)时,系统能保持高效运行,并保持良好除磷效果,但当温度高于30℃时,出水磷浓度开始恶化,出水磷浓度为3.33mg.L-1,吸磷效率下降。根据在不同温度条件下,厌氧PHB合成速率RPHB-produced与磷释放速率RP-release的比值R1和好氧条件下PHB降解速率RPHB-degradation与磷吸收速率RP-uptake的比值R2可以得出结论,在环境温度为20℃的条件下,更有利于系统内EBPR高效稳定的运行。
The impact of temperature(5℃,10℃,20℃,25℃,30℃ and 35℃)on biological phosphorus removal system was investigated using anaerobic/aerobic SBR system in a lab scale with domestic wastewater.The results showed that under the low temperature(10℃),the performance of phosphorus removal and PHB-degradation fell off obviously due to the decrease of microbe activity,the phosphorus concentration in effluent rose to 6.95 mg·L-1 at 5℃ from 0 mg·L-1 at 20℃.The degradation of PHB declined and accumulated in the system gradually.When the temperature was between 25℃ and 30℃,the average phosphorus removal efficiency could keep at high level.But when higher than 30℃,the phosphorus concentration in effluent rose to 3.33 mg·L-1.The phosphorus removal efficiency lost gradually.The results of lab test showed that the critical temperature to keep the high biological phosphorus removal efficiency was 20℃,based on the ratio of R1=RPHB-produced/RP-release for anaerobes and R2=RPHB-degradation/RP-uptake for aerobes.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2011年第4期1103-1109,共7页
CIESC Journal
基金
国家'十一五'重大科技专项课题(2008ZX07209-003)
高等学校博士学科点专项科研基金(20091103110011)
北京市教委科技创新平台项目(PXM2008_014204_050843)~~
关键词
生活污水
温度冲击
PHB
domestic wastewater
temperature impact
PHB