一体化氧化沟固液分离效果的研究
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摘要
固液分离器是一体化氧化沟的核心技术,为寻求一种简易强化固液分离装置,本试验将普通二沉池和Garrett工艺特点结合起来,并沿袭现有固液分离器的优点,对“沟内分离+沟外沉淀”固液分离器进行试验研究。
本次试验在总结现有研究成果的基础上,设计了多组不同的固液分离组件,通过对不同组件进行试验,筛选出效果较好的折板固液分离组件,并对其进行中试工程试验。
大量试验数据表明;在进水水质、水量、污泥浓度、污泥沉降性能、表面负荷等不断变化的情况下,侧沟出水SS始终优于国家相应的标准值。出水中SS小于20mg/L的占93.3%,SS小于15mg/L的占89.3%,SS小于5mg/L的占21.3%,这些都说明该种形式的固液分离器具有很好的固液分离效果,并且有较好的耐冲击性能。
本文对固液分离器众多影响因素进行挑选,选择表面负荷、污泥沉降陛能、主沟沟底流速、组件缝隙间距进行正交试验。结果显示,对出水的影响程度由大到小是表面负荷＞污泥沉降性能＞沟底流速＞组件缝隙间距,并得出最优组合即;表面负荷SOR沟内固液分离器80m~3/m~2·d、沟外固液分离器48m~3/m~2·d,污泥沉降性能SVI为80mL/g,沟底流速V为0.3m/s,组件缝隙间距20cm。
同时,本文对固液分离器污泥回流效果进行试验,发现在沟内污泥回流主要发生在后部,越靠近尾部,污泥回流状况越好。
The separator is core technology of the Integrated Oxidation Ditches, to seek for one measure to reinforce solid-liquid separator, the second settlement and Garrett process were combined in this test, together with existing solid-liquid separator's advantage. "Inside separator+ outside settlement" solid-liquid separator was tested.
On the basis of prior study, several separator models were designed in the experiment. By testing the different kinds of separators, the Folded Plate solid liquid separator, which was applied in the middling scale project, was chose, because of its good effect.
Many data show that the SS always were better than the standard as the MLSS、SVI、SOR changed continually. The SS less than 20mg/L account for 93.3%, less than 15mg/L account for 89.3%, less than 5mg/L account for 21.3%. These data indicate that this solid liquid separator has good solid liquid separating effect, together with good shock resistance.
By observing and analyzing the phenomena in the middling scale project, influencing factors of the separation were determined, and some of them such as SOR、SVI、V and Component distance were chosen to make Orthogonal experiment. The result indicated that the influencing extent from deep to simple was V, SVI, Component distance, SOR. At the same time, the best Collocation was found, which is as follows:SOR of Inside solid-liquid Separator: 80m~3/m~2·d, SOR of Outside solid-liquid Separator: 48m~3/m~2·d SVI: 80mL/g, V: 0.3m/s, Component distance: 20cm.
The return of separator was studied in this experiment. The result showed that return of sludge mainly took place in the back of solid liquid separator. The state of sludge return was better as to be the end.
本次试验在总结现有研究成果的基础上,设计了多组不同的固液分离组件,通过对不同组件进行试验,筛选出效果较好的折板固液分离组件,并对其进行中试工程试验。
大量试验数据表明;在进水水质、水量、污泥浓度、污泥沉降性能、表面负荷等不断变化的情况下,侧沟出水SS始终优于国家相应的标准值。出水中SS小于20mg/L的占93.3%,SS小于15mg/L的占89.3%,SS小于5mg/L的占21.3%,这些都说明该种形式的固液分离器具有很好的固液分离效果,并且有较好的耐冲击性能。
本文对固液分离器众多影响因素进行挑选,选择表面负荷、污泥沉降陛能、主沟沟底流速、组件缝隙间距进行正交试验。结果显示,对出水的影响程度由大到小是表面负荷＞污泥沉降性能＞沟底流速＞组件缝隙间距,并得出最优组合即;表面负荷SOR沟内固液分离器80m~3/m~2·d、沟外固液分离器48m~3/m~2·d,污泥沉降性能SVI为80mL/g,沟底流速V为0.3m/s,组件缝隙间距20cm。
同时,本文对固液分离器污泥回流效果进行试验,发现在沟内污泥回流主要发生在后部,越靠近尾部,污泥回流状况越好。
The separator is core technology of the Integrated Oxidation Ditches, to seek for one measure to reinforce solid-liquid separator, the second settlement and Garrett process were combined in this test, together with existing solid-liquid separator's advantage. "Inside separator+ outside settlement" solid-liquid separator was tested.
On the basis of prior study, several separator models were designed in the experiment. By testing the different kinds of separators, the Folded Plate solid liquid separator, which was applied in the middling scale project, was chose, because of its good effect.
Many data show that the SS always were better than the standard as the MLSS、SVI、SOR changed continually. The SS less than 20mg/L account for 93.3%, less than 15mg/L account for 89.3%, less than 5mg/L account for 21.3%. These data indicate that this solid liquid separator has good solid liquid separating effect, together with good shock resistance.
By observing and analyzing the phenomena in the middling scale project, influencing factors of the separation were determined, and some of them such as SOR、SVI、V and Component distance were chosen to make Orthogonal experiment. The result indicated that the influencing extent from deep to simple was V, SVI, Component distance, SOR. At the same time, the best Collocation was found, which is as follows:SOR of Inside solid-liquid Separator: 80m~3/m~2·d, SOR of Outside solid-liquid Separator: 48m~3/m~2·d SVI: 80mL/g, V: 0.3m/s, Component distance: 20cm.
The return of separator was studied in this experiment. The result showed that return of sludge mainly took place in the back of solid liquid separator. The state of sludge return was better as to be the end.
引文
[1]陈学群等.Carrousel氧化沟技术演变规律的探究[J].给水排水,2002.2;15-19.
[2]褚俊英等总局、科技部文件.城市污水处理及污染防治技术政策.城建[2000]124号.
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[14]国家环保局.我国2003年环保公报,2004.6
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[17]李伟民,邓荣森,王涛.一体化氧化沟在城市污水处理中的工程应用[J].重庆建筑大学学报,2001.4,Vol.23,No.2;104-108.
[18]庞真勇.氧化沟污水处理技术展望[J].环境科学与技术.1999年11月,1999年第4期,总第87期;40-41.
[19]钱望新钟鸣等.合建式氧化沟试验研究[J].中国给水排水.1990.65;32-34,
[20]汪诚文,陈吕军,钱易.一体化氧化沟试验研究[J].环境科技2000.Vol.23,No.6;20-26.
[21]王喜良,黄云平,周兴龙等.斜板沉降固液分离理论及设备进展[J].金属矿山,1999.2;21-24.
[22]王秀蘅,孙卫东等.斜板沉淀池在一体化氧化沟中的作用[J].中国给水排水.2001.Vol.17,No11;66-69.
[23]王秀蘅,刘俊新,彭建凤.一体化氧化沟处理城市污水试验研究[J].给水排水.2001,Vol.27,No12;31-34.
[24]王涛,邓荣森,潘江俊等.一体化氧化沟侧沟固液分离器分离效果研究[J].中国给水排水.1995,Vol.15,No3;17-19.
[25]邬扬善.城市污水处理——投资与决策.中国环境科学出版社[M],1992;104-165.;
[26]姚加飞等.活性污泥系统中曝气机的速度控制[J].给水排水,2001.3;13-17.
[27]C.P.Leslie Grady等著,张锡辉'刘勇弟译《废水生物处理》[M].化学工业出版社,2003,
[28]张爱华 崔青安等.一体化氧化沟沉淀船运行方式[J].中国给水排水.2000.12;42-46.
[29]张希衡.水污染控制工程[M]冶金工业出版社,北京,2004;20-39.
[30]张自杰.排水工程[M](下册).中国建筑工业出版社,北京,1996;35-60.
[31]郑强.船型一体化氧化沟工艺运行特性[J].水处理技术.2000,Vol.26,No5;292-302.
[32]中国环境状况公报(2005年),2006年6月15日http;//www.cenews.com.cn
[33]朱雁伯.我国污水处理事业现状及今后发展趋势[J],土木工程学会水工业分会排水委员第四届第一次年会,天津,2001.。
[34]Abusam,A.;Keesman,K.J.;van Straten,G..Water Research,.Forward and backward uncertainty propagation;an oxidation ditch modelling example.Jan2003, Vol.37 Issue 1,p429..
[35]D.Bames,C.F.Forster and D.W.M.Johnstone.Oxidation Ditches in Wastewater Treatment.1993.
[36]JOhnson,A.C.~1 Aemi,H.-R.~2 Gerritsen,A.Comparing steroid estrogen,and nonylphenol content across a range of European sewage plants with different treatment and management practices.Water Research,Jan2005,Vol.39 Issue 1,p47-58.
[37]Lu,Zhou;Yi,Qian.Evaluation on the performance of triple oxidation ditch system,Journal of Environmental Sciences,Sep97,Vol.9 Issue 3,p257.
[38]Nakasone,Hideo;Ozald,Masuo.Oxidation-Ditch Proc Using Falling Water as Aerator,ournal of Environmental Engineering,Feb95,Vol.121 Issue 2,p 132.
[39]R G Hoidich and G Butt solid/liquid separation by sedimentation,,Proclnstm Mech Engrs vol211,PatrE,1997,43-52.
[2]褚俊英等总局、科技部文件.城市污水处理及污染防治技术政策.城建[2000]124号.
[3]崔宁.侧沟式一体化氧化沟处理技术[J],陕西环境.1998,VolS,No.3,30-31.
[4]邓荣森.氧化沟污水处理理论与技术[M].北京;化学工业出版社,2006.6;118-130.
[5]邓荣森,许俊仪,谭显春.城市污水处理与一体化氧化沟技术[J].给水排水.2000,Vol.26,No.11;28-30.
[6]邓荣森等.从运行方式看氧化沟技术的发展[J].给水排水,2000,26(3);20-24.
[7]邓荣森 许俊仪等.侧沟式固液分离器污泥回流机理研究[J].中国给水排水.2000,Vol.16,No 8,1-3.
[8]邓荣森 俞天明等.新型一体化氧化沟工艺的节能特点[J].中国给水排水.2001.Vol.17,No 10;7 44-46.
[9]邓荣森等.一体化氧化沟技术的发展[J].中国给水排水,1998,14(1);42-44.
[10]邓荣森,李烈锋,王涛等.侧沟式固液分离器强化污水回流研究[丁].重庆建筑大学学报.2004,Vol.26,No.4;66-29
[11]符九龙,水处理工程[M],中国建筑工业出版社,北京,2000.6;54-61.
[12]高廷耀,水污染控制工程[M],高等教育出版社2005.4;19-29.
[13]贵州省环境状况公报,贵州省环境保护局,2006.5;2-8.
[14]国家环保局.我国2003年环保公报,2004.6
[15]建设部、国家环境保护总局.“我国城市污水处理现状与发展对策”.《市政技术》,1997.2.
[16]李海,孙瑞征,陈振选等.城市污水处理技术及工程实例[M].化学工业出版社.2002.5;43-81.
[17]李伟民,邓荣森,王涛.一体化氧化沟在城市污水处理中的工程应用[J].重庆建筑大学学报,2001.4,Vol.23,No.2;104-108.
[18]庞真勇.氧化沟污水处理技术展望[J].环境科学与技术.1999年11月,1999年第4期,总第87期;40-41.
[19]钱望新钟鸣等.合建式氧化沟试验研究[J].中国给水排水.1990.65;32-34,
[20]汪诚文,陈吕军,钱易.一体化氧化沟试验研究[J].环境科技2000.Vol.23,No.6;20-26.
[21]王喜良,黄云平,周兴龙等.斜板沉降固液分离理论及设备进展[J].金属矿山,1999.2;21-24.
[22]王秀蘅,孙卫东等.斜板沉淀池在一体化氧化沟中的作用[J].中国给水排水.2001.Vol.17,No11;66-69.
[23]王秀蘅,刘俊新,彭建凤.一体化氧化沟处理城市污水试验研究[J].给水排水.2001,Vol.27,No12;31-34.
[24]王涛,邓荣森,潘江俊等.一体化氧化沟侧沟固液分离器分离效果研究[J].中国给水排水.1995,Vol.15,No3;17-19.
[25]邬扬善.城市污水处理——投资与决策.中国环境科学出版社[M],1992;104-165.;
[26]姚加飞等.活性污泥系统中曝气机的速度控制[J].给水排水,2001.3;13-17.
[27]C.P.Leslie Grady等著,张锡辉'刘勇弟译《废水生物处理》[M].化学工业出版社,2003,
[28]张爱华 崔青安等.一体化氧化沟沉淀船运行方式[J].中国给水排水.2000.12;42-46.
[29]张希衡.水污染控制工程[M]冶金工业出版社,北京,2004;20-39.
[30]张自杰.排水工程[M](下册).中国建筑工业出版社,北京,1996;35-60.
[31]郑强.船型一体化氧化沟工艺运行特性[J].水处理技术.2000,Vol.26,No5;292-302.
[32]中国环境状况公报(2005年),2006年6月15日http;//www.cenews.com.cn
[33]朱雁伯.我国污水处理事业现状及今后发展趋势[J],土木工程学会水工业分会排水委员第四届第一次年会,天津,2001.。
[34]Abusam,A.;Keesman,K.J.;van Straten,G..Water Research,.Forward and backward uncertainty propagation;an oxidation ditch modelling example.Jan2003, Vol.37 Issue 1,p429..
[35]D.Bames,C.F.Forster and D.W.M.Johnstone.Oxidation Ditches in Wastewater Treatment.1993.
[36]JOhnson,A.C.~1 Aemi,H.-R.~2 Gerritsen,A.Comparing steroid estrogen,and nonylphenol content across a range of European sewage plants with different treatment and management practices.Water Research,Jan2005,Vol.39 Issue 1,p47-58.
[37]Lu,Zhou;Yi,Qian.Evaluation on the performance of triple oxidation ditch system,Journal of Environmental Sciences,Sep97,Vol.9 Issue 3,p257.
[38]Nakasone,Hideo;Ozald,Masuo.Oxidation-Ditch Proc Using Falling Water as Aerator,ournal of Environmental Engineering,Feb95,Vol.121 Issue 2,p 132.
[39]R G Hoidich and G Butt solid/liquid separation by sedimentation,,Proclnstm Mech Engrs vol211,PatrE,1997,43-52.
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