剩余污泥臭氧化过程中磷的释放及形态转化
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摘要
以剩余污泥臭氧化过程中含磷物质的形态分布及变化规律为研究核心,分析了不同臭氧投加量下污泥样品中液相和固相中磷的形态,并探讨了不同磷形态与臭氧相关的释放性能.结果表明,臭氧投加量为0.15 g·g~(-1)时,液相总磷(TP_L)含量为38.26 mg·L~(-1),比氧化前污泥混合液中TP_L含量增加了29倍,因此,可将0.15 g·g~(-1)作为实际释磷工艺最佳臭氧投加量.臭氧氧化过程中污泥固相中各形态磷含量及其所占固相总磷(TP_S)比例的变化趋势基本相同.臭氧可提高污泥中磷潜在的生物可利用性,臭氧投加量为0.15 g·g~(-1)时,生物有效磷含量达20.74 mg·g~(-1),在TP_S中所占比例由原始污泥中的73.60%提高至86.27%.TP_L含量的增加主要来自污泥臭氧氧化过程中污泥解絮和溶胞,每溶解1 g MLSS向液相中释放TP_L的量为0.0324 g.
The mechanism of the sludge reduction through ozonation was systematically investigated using the excessive sludge obtained from municipal sewage treatment plants. The phosphorus fractions in liquid and solid phase were clarified and the release performance of different phosphorus fractions in solid related to ozone was also explored. The results indicate that the total phosphorus in liquid(TP_L) was 38.26 mg·L~(-1) when the ozone dosage was 0.15 g·g~(-1), which is 29 times more than that before oxidation. The forms of phosphorus content and its proportion in total phosphorus(TP_S) in solid sludge was basically the same during ozonation. The bio-available phosphorus increased with ozone dosage. The proportion of TP_S increased from 73.60% in the original sludge to 86.27% with 0.15 g·g~(-1) ozone, reaching 20.74 mg·g~(-1) of P content. TP_L in liquid was mainly from the destruction of extracellular polymer structure and the dissolution of phosphorus-containing substances, with a rate of 0.0324 g TP_L of 1 g MLSS.
The mechanism of the sludge reduction through ozonation was systematically investigated using the excessive sludge obtained from municipal sewage treatment plants. The phosphorus fractions in liquid and solid phase were clarified and the release performance of different phosphorus fractions in solid related to ozone was also explored. The results indicate that the total phosphorus in liquid(TP_L) was 38.26 mg·L~(-1) when the ozone dosage was 0.15 g·g~(-1), which is 29 times more than that before oxidation. The forms of phosphorus content and its proportion in total phosphorus(TP_S) in solid sludge was basically the same during ozonation. The bio-available phosphorus increased with ozone dosage. The proportion of TP_S increased from 73.60% in the original sludge to 86.27% with 0.15 g·g~(-1) ozone, reaching 20.74 mg·g~(-1) of P content. TP_L in liquid was mainly from the destruction of extracellular polymer structure and the dissolution of phosphorus-containing substances, with a rate of 0.0324 g TP_L of 1 g MLSS.
引文
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许晓萍.2010.我国市政污泥处理现状与发展探析[J].江西化工,(3):24-32
Xu Y,Hu H,Liu J,et al.2015.pH dependent phosphorus release from waste activated sludge:contributions of phosphorus speciation[J].Chemical Engineering Journal,267:260-265
Xie C S,Zhao J,Tang J,et al.2011.The phosphorus fractions and alkaline phosphatase activities in sludge[J].Bioresource Technology,102(3):2455-2461
苑宏英,祁丽,吴丽杰,等.2014.酸碱联合调节剩余污泥过程中磷的释放及形态转化[J].中国给水排水,30(3):69-72
Yan S T,Chu L B,Xing X H,et al.2009.Analysis of the mechanism of sludge ozonation by a combination of biological and chemical approaches[J].Water Research,43(1):195-203
周思琦,戴晓虎,戴翎翎,等.2018.高温热水解对高含固污泥中磷的形态转化影响[J].中国环境科学,38(4):1391-1396
张亮,杨卉芃,冯安生,等.2017.全球磷矿资源开发利用现状及市场分析[J].矿产保护与利用,(5):105-112
赵婧婧.2015.超声波联合水解处理中剩余污泥磷释放特性及回收研究[D].上海:华东理工大学
朱梦圆,朱广伟,钱君龙,等.2012,SMT法插标分析沉积物中磷的地球化学形态[J].中国环境科学,32(8):1502-1507
章婷曦,王晓蓉,金相灿.2007.太湖不同营养水平湖区沉积物中磷形态的分布特征[J].农业环境科学学报,26(4):1207-1213
邓雍.2013.臭氧氧化污泥的试验研究[D].重庆:重庆大学
戴晓虎.2012.我国城镇污泥处理处置现状及思考[J].给水排水,38(2):1-5
方斌.2012.臭氧氧化法活性污泥零排放技术的基础研究[D].天津:天津科技大学
国家环境保护局.2002.水和废水监测分析方法(4 版)[M].北京:中国环境科学出版社
侯瑞,金鑫,金鹏康.2018.污水厂二级出水中难凝聚有机物的臭氧化特性[J].环境科学,39(2):844-851
黄晓楠.2017.活性污泥臭氧化溶胞效能研究[D].杭州:浙江工业大学
He Z W,Liu W Z,Wang L,et al.2016.Clarification of phosphorus fractions and phosphorus release enhancement mechanism related to pH during waste activated sludge treatment[J].Bioresource Technology,222:217-225
李维,高辉,罗英杰,等.2015.国内外磷矿资源利用现状、趋势分析及对策建议[J].中国矿业,24(6):6-10
孟详东,黄群星,严建华,等.2018.磷在污泥热解过程中的迁移转化[J].化工学报,69(7):3208-3215+3303
Meng X,Liu D,Yang K,et al.2013.A full scale anaerobic-anoxic-aerobic process coupled with low-dose ozonation for performance improvement.Bioresource Technology,146C(10):240
Medeiros J J G,Cid B P,Gómez E F.2005.Analytical phosphorus fractionation in sewage sludge and sediment samples[J].Analytical & Bioanalytical Chemistry,381(4):873-878
Rittmann B E,Mayer B,Westerhoff P,et al.2011.Capturing the lost phosphorus[J].Chemosphere,84(6):846-853
孙远军.2013.水体沉积物磷元素释放的影响因素及控制技术研究[J].给水排水,49(S1):138-142
沈巍.2012.中国磷资源开发利用的现状分析与可持续发展建议[J].经济研究导刊,(5):83-84
谭笑.2015.臭氧化活性污泥减量机制及对A～2/O工艺的影响研究[D].成都:西南石油大学
田素凤,王静超,丁艳梅.2012.鸟粪石沉淀法回收剩余污泥及其上清液中磷[J].哈尔滨商业大学学报(自然科学版),28(2):194-196
王裕祥,黄祎晨,张鑫,等.2017.微气泡臭氧强化污泥碳源的释放过程[J].环境工程学报,11(4):2426-2432
王晓霞,吕树光.2012.用磷酸铵镁沉淀法对剩余污泥超声波处理上清液的磷回收研究[J].华东理工大学学报,38(1):58-63
吴俊奇,李燕城,吕亚芹.2009.水处理实验技术[M].北京:中国建筑工业出版社
王嵘.2008.臭氧破解污泥的溶出机制及同步臭氧氧化对污泥减量效能的影响研究[D].南昌:南昌大学
徐志嫱,李瑶,周爱朝,等.2018.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,34(21):24-30
许德超,周礼杰,尹魁浩,等.2017.低温热碱破解低有机质污泥及磷形态分析[J].环境工程学报,11(10):5621-5629
许春雪,袁建,王亚平,等.2011.沉积物中磷的赋存形态及磷形态顺序提取分析方法[J].岩矿测试,30(6):785-794
许晓萍.2010.我国市政污泥处理现状与发展探析[J].江西化工,(3):24-32
Xu Y,Hu H,Liu J,et al.2015.pH dependent phosphorus release from waste activated sludge:contributions of phosphorus speciation[J].Chemical Engineering Journal,267:260-265
Xie C S,Zhao J,Tang J,et al.2011.The phosphorus fractions and alkaline phosphatase activities in sludge[J].Bioresource Technology,102(3):2455-2461
苑宏英,祁丽,吴丽杰,等.2014.酸碱联合调节剩余污泥过程中磷的释放及形态转化[J].中国给水排水,30(3):69-72
Yan S T,Chu L B,Xing X H,et al.2009.Analysis of the mechanism of sludge ozonation by a combination of biological and chemical approaches[J].Water Research,43(1):195-203
周思琦,戴晓虎,戴翎翎,等.2018.高温热水解对高含固污泥中磷的形态转化影响[J].中国环境科学,38(4):1391-1396
张亮,杨卉芃,冯安生,等.2017.全球磷矿资源开发利用现状及市场分析[J].矿产保护与利用,(5):105-112
赵婧婧.2015.超声波联合水解处理中剩余污泥磷释放特性及回收研究[D].上海:华东理工大学
朱梦圆,朱广伟,钱君龙,等.2012,SMT法插标分析沉积物中磷的地球化学形态[J].中国环境科学,32(8):1502-1507
章婷曦,王晓蓉,金相灿.2007.太湖不同营养水平湖区沉积物中磷形态的分布特征[J].农业环境科学学报,26(4):1207-1213