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| 厌氧消化-絮凝-SNAD联合工艺处理海产品加工废水的研究 |
| Treatment of Seafood Processing Wastewater using Anaerobic Digestion-Flocculation-SNAD Combination Process |
| 投稿时间：2019-02-27 修订日期：2019-03-18 |
| DOI： |
| 中文关键词: 海产品加工废水 厌氧消化 化学絮凝 SNAD 脱碳除氮除磷 |
| 英文关键词: Seafood Processing Wastewater Anaerobic digestion Chemical flocculation SNAD Carbon, nitrogen and phosphorus removal |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| 中文摘要: |
| 设计厌氧消化-化学絮凝-SNAD联合工艺对海产品加工中的高浓泡药间废水的处理进行探究。厌氧消化对废水中COD去除率平均可达89.77 %,有机氮与聚合磷转化为NH4+-N、PO43--P浓度分别达总氮、总磷浓度的85%-90 %；20 g.L-1的聚合氯化铝可实现1000 mg.L-1的总磷去除率达99.27 %,出水磷浓度为7.29 mg.L-1。SNAD系统中控制温度为32-35 ℃,以空气流量10-15 mL.min-1间歇曝气(Tae/Tan=10 min /5 min)控制DO值为0.1 mg/L左右,pH值7.5~8.0,HRT为24 h,运行稳定时最高可处理总氮浓度为655 mg.L-1的废水,总氮、COD去除率分别为72.71 %、56.70 %。高通量测序结果表明反应器内形成了SNAD系统,AOB、AnAOB和DNB含量分别为：2.721 %、2.086 %、1.458 %。 |
| 英文摘要: |
| In this study, the high-concentration foam wastewater in seafood processing was studied by anaerobic digestion-chemical flocculation-SNAD combination process .The removal rate of COD in wastewater after anaerobic digestion reached 89.77% on average; the conversion of organic nitrogen and polyphosphate resulted in an increase in the concentration of NH4+-N and PO43--P, which reached 85%-90% of total nitrogen and total phosphorus, respectively; Under conditions of 180 r?min-1 (60 min) and 80 r?min-1 (30 min), 20 g?L-1 of polyaluminium chloride can remove 99.27% of Phosphate content after two hours of precipitation. The content of phosphorus in the medium is only 7.29 mg?L-1. The control temperature in the SNAD system is 32-35 ° C. The air flow rate is 10-15 mL?min-1 and the way of aeration is intermittent (Tae/Tan=10min /5min). The DO concentration is about 0.1 mg/L, and the pH is 7.5-8.0. HRT is 24h. When the operation is stable, the wastewater with total nitrogen content of 655 mg?L-1 can be treated. The total nitrogen and COD removal rates are 72.71% and 56.70%, respectively. The results of high-throughput sequencing indicated that SNAD was formed in the reactor, and the contents of AOB, AnAOB and DNB were 2.721%, 2.086% and 1.458%, respectively. |
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