厌氧消化-化学混凝-SNAD联合工艺处理海产品加工废水

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于洪淼,王超,王晓静,杨凤林,张树深.厌氧消化-化学混凝-SNAD联合工艺处理海产品加工废水[J].,2019,59(4):336-342

厌氧消化-化学混凝-SNAD联合工艺处理海产品加工废水

Treatment of seafood processing wastewater using anaerobic digestion-chemical coagulation-SNAD combination process

DOI：10.7511/dllgxb201904002

中文关键词:海产品加工废水厌氧消化化学混凝 SNAD 除碳脱氮除磷

英文关键词:seafood processing wastewater anaerobic digestion chemical coagulation SNAD carbon, nitrogen and phosphorus removal

基金项目:国家自然科学基金资助项目(21777018).

作者	单位
于洪淼,王超,王晓静,杨凤林,张树深

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中文摘要:

设计厌氧消化-化学混凝-SNAD联合工艺对海产品加工中的高浓泡药间废水进行处理．厌氧消化对废水中COD去除率最高可达94.37%，平均可达89.77%，有机氮与聚合磷转化为NH+4-N、PO3-4-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总磷浓度1 000 mg·L-1废水的总磷去除率99.83%，出水磷浓度为1.70 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(ton/toff=10 min/5 min)控制DO为0.1 mg·L-1左右，pH为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2.72%、2.09%、1.46%．

英文摘要:

An anaerobic digestion-chemical coagulation-SNAD combination process is designed for the treatment of the high-concentration foam wastewater in seafood processing. The removal rate of COD in wastewater by anaerobic digestion is up to 94.37%, with an average of 89.77%. The conversion of organic nitrogen and polyphosphate results in an increase in the concentration of NH+4-N and PO3-4-P, which reaches 85%-90% of total nitrogen and total phosphorus, respectively. 20 g·L-1 of polyaluminum chloride can remove 99.83% of total phosphorus in the wastewater with total phosphorus content of 1 000 mg·L-1. The content of phosphorus in the medium is only 1.70 mg·L-1. The control temperature in the SNAD system is 32-35 ℃. The air flow rate is 10-15 mL·min-1and the way of aeration is intermittent (ton/toff=10 min/5 min). The DO concentration is about 0.1 mg·L-1, and the pH is 7.5-8.0. HRT is 24 h. 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 indicate that SNAD system is formed in the reactor, and the contents of AOB, AnAOB and DNB are 2.72%, 2.09% and 1.46%, respectively.

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