WU Yue,ZHAO Chuan-feng,SUN Fa-wen,et al.Feasibility of Aerobic Granular Sludge Formation in Continuous Flow Reactor Based on Two-zone Sedimentation Tank[J].China Water & Wastewater,2020,36(19):9-15.
雙區(qū)沉淀池用于連續(xù)流好氧顆粒污泥工藝的可行性
- Title:
- Feasibility of Aerobic Granular Sludge Formation in Continuous Flow Reactor Based on Two-zone Sedimentation Tank
- Keywords:
- aerobic granular sludge; continuous flow; two-zone sedimentation tank; radial sedimentation tank; selection pressure
摘要:- 選取一座已初步形成好氧顆粒污泥的工業(yè)污水處理廠的輻流式沉淀池為研究對象，結(jié)合實際運行情況建立固液二相流模型，分析沉淀池內(nèi)活性污泥的沉降性能和分布規(guī)律。從沉淀池底徑向距離中心1、6和12 m處取得3個污泥樣本S1、 S2和S3，其中S1的平均粒徑（294.6 μm）遠(yuǎn)高于S2（142.8 μm）和S3（55.2 μm），對應(yīng)的污泥指數(shù)（SVI）分別為56.2、63.4和81.3 mL/g。綜合試驗結(jié)果和計算流體力學(xué)(CFD)模擬結(jié)果可以發(fā)現(xiàn)，沉淀池內(nèi)顆粒污泥主要集中在半徑為1~6 m的圓環(huán)區(qū)域內(nèi)。因此，可以通過選擇性回流中心區(qū)域內(nèi)的顆粒污泥來制造選擇壓，從而實現(xiàn)連續(xù)流工藝的污泥顆�；�
Abstract:- A radial sedimentation tank from a full-scale industrial sewage treatment plant which has formed the primary aerobic granular sludge (AGS), was used to investigate the settling performance and distribution of the activated sludge in a solid-liquid two-phase flow system using computational fluid dynamics (CFD) model. Three sludge samples (S1, S2 and S3) were taken from the bottom of the sedimentation tank at the different radial distances (1 m, 6 m and 12 m, respectively) from the center of the tank. The average particle size of S1 sludge (294.6 μm) was higher than that of S2 sludge (142.8 μm) and S3 sludge (55.2 μm), while the corresponding sludge volume index for three sludge samples were 56.2 mL/g, 63.4 mL/g and 81.3 mL/g, respectively. Both CFD simulation and experimental data showed that the ring area with a radius of 1-6 m in sedimentation tank contributed to the retention of heavier and larger granular sludge. Therefore, the selection pressure could be generated by selective recirculation of the granular sludge in the center area of the sedimentation tank to enhance the aerobic granulation in the continuous flow reactor.
相似文獻(xiàn)/References:
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ZHANG Ying,WANG Chang wen,LI Jun,et al.Strengthening Aerobic Granulation of Activated Sludge by Adding Micro Powder in Low Concentration Sewage Treatment[J].China Water & Wastewater,2018,34(19):12.
[2]趙錫鋒,李興強(qiáng),李軍.好氧顆粒污泥技術(shù)中試研究及應(yīng)用進(jìn)展[J].中國給水排水,2020,36(8):30.
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[5]宋欣,孫士權(quán),商光琦,等.氮硫比對好氧顆粒污泥特性影響及其脫氮除硫效果[J].中國給水排水,2021,37(19):91.
SONG Xin,SUN Shi-quan,SHANG Guang-qi,et al.Effect of Nitrogen to Sulfur Ratio on Characteristics of Aerobic Granular Sludge and Its Nitrogen and Sulfur Removal Performance[J].China Water & Wastewater,2021,37(19):91.
