| 复合底物对颗粒化EBPR系统除磷特性的影响及优化试验研究 |
| 摘要点击 2329 全文点击 695 投稿时间：2012-01-04 修订日期：2012-03-27 |
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| 中文关键词 复合底物 EBPR 颗粒污泥 除磷特性 正交分析 |
| 英文关键词 composite substrate EBPR granular-based sludge phosphorus removal orthogonal array |
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| 中文摘要 |
| 以成熟除磷颗粒污泥为基础,基于获得的最佳混合碳源配比,通过正交试验研究了复合底物［m(C)/m(N)/m(P)］对颗粒化EBPR系统稳定过程除磷特性的影响. 结果表明,R2［m(C)/m(N)/m(P)=400∶10∶5］、R3［m(C)/m(N)/m(P)=600∶10∶10］、R5［m(C)/m(N)/m(P)=400∶20∶15］系统发生了丝状菌颗粒污泥膨胀; R6［m(C)/m(N)/m(P)=600∶20∶5］系统因出现大量颗粒碎片导致沉降性能变差,待颗粒碎片排出系统后恢复正常. R3、R8［m(C)/m(N)/m(P)=400∶30∶10］、R9［m(C)/m(N)/m(P)=600∶30∶15］系统的颗粒粒径从初始的0.8 mm逐渐下降至0.3 mm,其余系统则与初始相差不多. R1［m(C)/m(N)/m(P)=200∶10∶15］、R4［m(C)/m(N)/m(P)=200∶20∶10］和R7［m(C)/m(N)/m(P)=200∶30∶5］系统在厌氧段消耗了95%的COD,释磷/吸磷速率分别在60~100 mg·(g·h)-1、60~80 mg·(g·h)-1、40~60 mg·(g·h)-1的范围内波动,且相对稳定,但其余系统的COD由主要在厌氧段消耗逐渐变为在好氧段消耗,释磷/吸磷速率亦逐渐下降,甚至有系统下降至0 mg·(g·h)-1. R1~R9系统的磷酸盐平均去除率分别是83.5%、52.8%、7.1%、96.7%、19.7%、72.2%、79.7%、28.1%和48.7%. 对正交试验结果应用方差分析,获得适合颗粒化EBPR系统稳定运行的最佳复合底物条件是m(C)/m(N)/m(P)=200∶20∶15. |
| 英文摘要 |
| Based on the mature granular sludge, effects of composite substrates［m(C)/m(N)/m(P)］ on the process of phosphorus removal in granule-based EBPR system was conducted by the optimal mixed-carbon sources ratio. Results showed that it was observed with the expanded filamentous bulking to granular sludge in the system of R2［m(C)/m(N)/m(P)=400∶10∶5］, R3［m(C)/m(N)/m(P)=600∶10∶10］ and R5［m(C)/m(N)/m(P)=400∶20∶15］. The presence of large amount of granular fragments led to the poor performance of R6［m(C)/m(N)/m(P)=600∶20∶5］, and it returned back after the particulate debris was removed off the system. The particle size of R3, R8［m(C)/m(N)/m(P)=400∶30∶10］ and R9［m(C)/m(N)/m(P)=600∶30∶15)］ gradually decreased from 0.8 mm to 0.3 mm, and other systems were similar to the initial size. More than 95 percent of the COD was consumed in the anaerobic stage in R1［m(C)/m(N)/m(P)=200∶10∶15］, R4［m(C)/m(N)/m(P)=200∶20∶10］ and R7［m(C)/m(N)/m(P)=200∶30∶5］, and the phosphorus release/uptake rates fluctuated within the range of 60-100 mg·(g·h)-1, 60-80 mg·(g·h)-1 and 40-60 mg·(g·h)-1, respectively. However, the COD consumption was mainly occurred in aerobic stage in other systems, and the phosphorus release/uptake rates gradually declined, even decreased to 0 mg·(g·h)-1. Phosphate removal rate of each system was (from R1 system to R9 system) 83.5%, 52.8%, 7.1%, 96.7%, 19.7%, 72.2%, 79.7%, 28.1% and 48.7%, respectively. Finally, we also found that the optimal composite substrate condition for the granule-based EBPR system was the ratio of the m(C)/m(N)/m(P)=200∶20∶15. |
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