| 超高盐高磷废水磷酸盐还原系统构建过程中磷系统转化分析研究 |
| 摘要点击 1730 全文点击 1467 投稿时间：2008-11-13 修订日期：2009-02-16 |
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| 中文关键词 超高盐高磷废水 磷酸盐还原 磷平衡 磷形态 |
| 英文关键词 hypersaline and high-phosphorus wastewater phosphate reduction phosphorus balance phosphorus forms |
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| 中文摘要 |
| 针对现有除磷技术存在的问题，以高盐高磷榨菜腌制废水为研究对象，探讨了磷酸盐生物还原系统构建过程中磷形态的转化.结果表明，以3%的盐度（以NaCl计，下同）废水启动反应器，通过两阶段盐度逐步提升法，在进水有机负荷(COD) 0.45 kg·(m3·d)-1，磷负荷（PO3-4-P） 5.0 g·(m3·d)-1，DO 6 mg·L-1，水温30℃，且未排泥的条件下，成功构建了超高盐（7%盐度）条件下的磷酸盐还原系统.通过该磷酸盐还原系统运行26个周期中，对磷平衡及污泥中磷形态转化进行研究.结果表明，系统中平均每日有41.8 mg·L-1的外源磷损失，而污泥中共有155 mg的内源磷通过磷形态转化以及磷酸盐还原途径损失，占外源磷损失量的14.2%，占系统磷损失总量的12.5%.系统构建过程中污泥的磷形态主要以Org-P→NaOH85-P→HCl-P→NaOH-P→BD-P→H2O-P途径进行转化. |
| 英文摘要 |
| Transformation of phosphorus forms in the construction process of biological phosphate reduction system was discussed in treating saline and high-phosphorus pickled mustard tube wastewater to resolve problems encountered with present phosphorus removal technology. A phosphate reduction system under hypersaline condition (salinity, 7%, measured by NaCl) was successfully constructed, when the reactor was started with 3% salinity wastewater and the salinity was increased through two stages, at influent organic loading (COD) 0.45 kg·(m3·d)-1, phosphorus loading (PO3-4-P) 5.0 g·(m3·d)-1, DO 6 mg/L, 30℃ and without sludge discharge. Phosphorus balance and transformation of phosphorus forms in sludge was studied on 26 running cycles of this phosphorus reduction system. Results show that averagely 41.8 mg·L-1 of external phosphorus gets lost per day, and that 155mg of internal phosphorus in sludge gets lost through the path of phosphorus forms transformation and phosphate reduction, which accounted for 14.2% of the external phosphorus loss and 12.5% of the total phosphorus loss, respectively. The transformation path of phosphorus forms in sludge is Org-P→NaOH85-P→HCl-P→NaOH-P→BD-P→H2O-P. |
