HU De-xiu,ZHANG Cong,ZHANG Yan.Phosphorus Release from Sludge Enhanced by Ultrasound and Optimization of Phosphorus Recovery by Magnesium Ammonium Phosphate Method[J].China Water & Wastewater,2020,36(15):65-72.
超声强化污泥释磷及MAP法磷回收优化研究
- Title:
- Phosphorus Release from Sludge Enhanced by Ultrasound and Optimization of Phosphorus Recovery by Magnesium Ammonium Phosphate Method
- Keywords:
- excess sludge; ultrasound; magnesium ammonium phosphate (MAP); phosphorus release; phosphorus recovery
- 摘要:
- 为提高剩余污泥的磷释放与回收效果，采用超声强化EDTA-厌氧处理后的剩余污泥释磷,并以鸟粪石(MAP)结晶法回收上清液中的磷，探究超声对磷释放的影响,同时确定了最佳超声工作参数，采用响应曲面法构建MAP法磷回收的二次多项式模型并验证了模型的适用性。结果表明，超声可以强化污泥中磷的释放，最佳超声工作参数如下：声能密度为1.0 W/mL、超声时间为40 min，在最佳工作参数下可向液相释放60%的TP，TP、PO3-4-P浓度分别达到未超声处理的1.6倍和1.4倍；经超声后污泥上清液中TP增加量与MLSS、MLVSS减少量呈正相关关系，每溶解1 mg的MLSS向上清液中释放0.010 1 mg的TP；磷回收的最优工艺条件：nMg/nP=2、pH值=9、搅拌时间为21 min，此时磷回收率为89.29%，回收的晶体产物主要成分是磷酸铵镁，其纯度为77.56%，且相比未超声，该条件下的回收量提高了30%。
- Abstract:
- In order to improve phosphorus release and recovery from sludge, ultrasound was applied to enhance phosphorous release from sludge treated by EDTA and anaerobic digestion, and then the phosphate in the supernatant was recovered by MgNH4PO4·6H2O (MAP) crystallization. Effect of ultrasound on phosphorus release was investigated, and the optimal ultrasonic operational parameters were determined. A quadratic polynomial model of phosphorus recovery by MAP method was constructed by response surface method (RSM) and its applicability was verified. The application of ultrasound could significantly strengthen phosphorus release of anaerobic digested sludge. The optimal ultrasonic operational parameters were as follows: sound energy density of 1.0 W/mL and ultrasonic time of 40 min. Under the optimal parameters, 60% of TP could be released to the liquid phase, and TP and PO3-4-P concentrations were 1.6 times and 1.4 times higher than those obtained by non-ultrasonic treatment. The increase of TP in supernatant after ultrasound was positively correlated with the decrease of MLSS and MLVSS, and 1 mg MLSS released 0.010 1 mg TP into the liquid. The optimal conditions of phosphorus recovery were as follows:nMg/nP=2, pH value of 9 and stirring time of 21 min, and the phosphorus recovery rate was 89.29%. The main component of the recovered crystals was magnesium ammonium phosphate with a purity of 77.56%, and the yield of obtained crystals increased by 30% compared to that without ultrasound.
相似文献/References:
[1]徐志嫱,李瑶,周爱朝,等.污泥热水解过程中磷的释放规律与影响因素[J].中国给水排水,2018,34(21):24.
XU Zhi qiang,LI Yao,ZHOU Ai chao,et al.Phosphate Release and Influencing Factors Analysis during Sludge Thermal Hydrolysis[J].China Water & Wastewater,2018,34(15):24.
[2]张彦平,呼瑞琪,李一兵,等.高铁酸盐氧化剩余污泥溶胞减量研究[J].中国给水排水,2020,36(15):59.
ZHANG Yan-ping,HU Rui-qi,LI Yi-bing,et al.Lysis and Reduction of Excess Sludge by Ferrate Oxidation[J].China Water & Wastewater,2020,36(15):59.
[3]晏习鹏,肖小兰,亓金鹏,等.中试厌氧膜生物反应器对剩余污泥的消化效果[J].中国给水排水,2020,36(19):1.
YAN Xi-peng,XIAO Xiao-lan,QI Jin-peng,et al.Digestion of Excess Sludge in a Pilot Anaerobic Membrane Bioreactor[J].China Water & Wastewater,2020,36(15):1.
[4]孙洋洋,张雨辰,徐苏云.不同来源剩余污泥有机质赋存特征及厌氧消化潜能[J].中国给水排水,2021,37(11):17.
SUN Yang-yang,ZHANG Yu-chen,XU Su-yun.Characteristics of Organic Matters in Excess Sewage Sludge from Different Sources and Their Anaerobic Digestion Potential[J].China Water & Wastewater,2021,37(15):17.
[5]朱赵冉,黄显怀,唐玉朝,等.低速搅拌球磨破解剩余污泥高效释放碳源[J].中国给水排水,2021,37(13):1.
ZHU Zhao-ran,HUANG Xian-huai,TANG Yu-chao,et al.High Efficient Release of Carbon Source from Excess Sludge Disintegrated by Low-speed Stirring and Ball-milling[J].China Water & Wastewater,2021,37(15):1.
[6]刘心怡,汤志业,朱晓茜,等.SBR反应器中活性污泥胞外聚合物的提取方法比较[J].中国给水排水,2021,37(17):25.
LIU Xin-yi,TANG Zhi-ye,ZHU Xiao-xi,et al.Comparison of Extracellular Polymeric Substance Extraction Methods from Activated Sludge in Sequencing Batch Reactor[J].China Water & Wastewater,2021,37(15):25.
[7]赵博玮,牛宇锟,谢飞,等.剩余污泥碳化裂解液的资源化中试研究[J].中国给水排水,2021,37(19):1.
ZHAO Bo-wei,NIU Yu-kun,XIE Fei,et al.Pilot-scale Study on Resource Recycling of Excess Sludge Carbonized Pyrolysis Liquid[J].China Water & Wastewater,2021,37(15):1.
[8]窦川川,刘玉玲,赵鹏鹤,等.碱预处理对剩余污泥DOM的溶出特征及平行因子分析[J].中国给水排水,2021,37(19):14.
DOU Chuan-chuan,LIU Yu-ling,ZHAO Peng-he,et al.Effect of Alkaline Pretreatment on DOM Dissolution Characteristics of Excess Sludge and Parallel Factor Analysis[J].China Water & Wastewater,2021,37(15):14.
[9]罗锋,彭进湖,张忠祥,等.南方污水处理厂污泥厌氧发酵制取碳源及投加策略[J].中国给水排水,2022,38(3):1.
LUO Feng,PENG Jin?hu,ZHANG Zhong-xiang,et al.Preparation of Carbon Source by Anaerobic Fermentation of Sludge in Wastewater Treatment Plant in Southern China and Its Dosing Strategy[J].China Water & Wastewater,2022,38(15):1.
[10]罗璐,施周,许仕荣,等.溶菌酶预处理对剩余污泥脱水性能的影响[J].中国给水排水,2022,38(3):87.
LUOLu,SHIZhou,XUShi-rong,et al.Effect of Lysozyme Pretreatment on Dewatering Performance of Excess Activated Sludge[J].China Water & Wastewater,2022,38(15):87.