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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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、PO■-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(t_(on)/t_(off)=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%.
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 PO■-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(t_(on)/t_(off)=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.
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 PO■-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(t_(on)/t_(off)=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.
引文
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[2] 沈小红,蒋袁曦.海产品加工废水处理工程的设计 [J].中国给水排水,2003,19(11):93-95.SHEN Xiaohong,JIANG Yuanxi.Design for marine product processing wastewater treatment project [J].China Water & Wastewater,2003,19(11):93-95.(in Chinese)
[3] 俞津津,黄冠男,姬玉欣,等.水产品加工废水生物处理工艺研究进展 [J].环境科学与技术,2011,34(11):76-82.YU Jinjin,HUANG Guannan,JI Yuxin,et al.Biological process for fish-processing wastewater treatment [J].Environmental Science & Technology,2011,34(11):76-82.(in Chinese)
[4] 厉文.A2/O生物膜工艺处理海产品加工废水的研究 [D].大连:大连理工大学,2015.LI Wen.Study on A2/O biofilm process for seafood wastewater treatment [D].Dalian:Dalian University of Technology,2015.(in Chinese)
[5] 孟祥宇.缺氧+推流式生物接触氧化工艺处理高含盐量水产品加工废水试验研究 [D].青岛:青岛理工大学,2014.MENG Xiangyu.Study on the anoxic and push flow biological contact aeration process for the aquatic product processing wastewater with high salt content [D].Qingdao:Qingdao Technological University,2014.(in Chinese)
[6] 李慧.基于不同排放标准的水产品加工废水生物处理工艺研究 [D].青岛:青岛理工大学,2016.LI Hui.Biological treatment study of aquatic products wastewater based on different standards [D].Qingdao:Qingdao University of Technology,2016.(in Chinese)
[7] 余东.水解酸化+接触氧化技术在水产品加工废水处理中的应用 [J].能源与环境,2014(5):81-82.YU Dong.Application of hydrolysis acidification + contact oxidation technology in wastewater treatment of aquatic products [J].Energy and Environment,2014(5):81-82.(in Chinese)
[8] 刘志强,毛友同,杨超,等.混凝沉淀/水解酸化/接触氧化处理水产品加工废水 [J].中国给水排水,2011,27(11):91-93.LIU Zhiqiang,MAO Youtong,YANG Chao,et al.Treatment of aquatic product processing wastewater by coagulation sedimentation/hydrolysis acidification/contact oxidation process [J].China Water & Wastewater,2011,27(11):91-93.(in Chinese)
[9] XU Xiaochen,XUE Yuan,WANG Dong,et al.The development of a reverse anammox sequencing partial nitrification process for simultaneous nitrogen and COD removal from wastewater [J].Bioresource Technology,2014,155:427-431.
[10] 金立建,黄凯,邱立平,等.倒置A2/O工艺处理海产品加工废水 [J].工业用水与废水,2012,43(1):83-85.JIN Lijian,HUANG Kai,QIU Liping,et al.Inverted A2/O process for treatment of marine product processing wastewater [J].Industrial Water & Wastewater,2012,43(1):83-85.(in Chinese)
[11] XU Xiaochen,WANG Gang,ZHOU Liang,et al.Start-up of a full-scale SNAD-MBBR process for treating sludge digester liquor [J].Chemical Engineering Journal,2018,343:477-483.
[12] WANG Gang,XU Xiaochen,GONG Zheng,et al.Study of simultaneous partial nitrification,anammox and denitrification (SNAD) process in an intermittent aeration membrane bioreactor [J].Process Biochemistry,2016,51(5):632-641.
[13] JETTEN M S M,STROUS M,VAN DE PAS-SCHOONEN K T,et al.The anaerobic oxidation of ammonium [J].FEMS Microbiology Reviews,1998,22(5):421-437.
[14] VAN DE GRAAF A A,DE BRUIJN P,ROBERTSON L A,et al.Autotrophic growth of anaerobic ammonium-oxidizing micro-organisms in a fluidized bed reactor [J].Microbiology,1996,142(8):2187-2196.
[15] 郑敏,张代均.废水化学法脱氮和化学法除磷的研究 [J].科技情报开发与经济,2006,16(1):154-156.ZHENG Min,ZHANG Daijun.The study on the denitrification and dephosphorization of the waste-water with the chemical processes [J].Sci-Tech Information Development & Economy,2006,16(1):154-156.(in Chinese)
[16] WANG Chao,LIU Sitong,XU Xiaochen,et al.Achieving mainstream nitrogen removal through simultaneous partial nitrification,anammox and denitrification process in an integrated fixed film activated sludge reactor [J].Chemosphere,2018,203:457-466.
[17] WANG Gang,XU Xiaochen,ZHOU Liang,et al.A pilot-scale study on the start-up of partial nitrification-anammox process for anaerobic sludge digester liquor treatment [J].Bioresource Technology,2017,241:181-189.
[18] KARTAL B,VAN NIFTRIK L,RATTRAY J,et al.Candidatus ′Brocadia fulgida′:an autofluorescent anaerobic ammonium oxidizing bacterium [J].FEMS Microbiology Ecology,2008,63(1):46-55.
[19] OSHIKI M,SHIMOKAWA M,FUJII N,et al.Physiological characteristics of the anaerobic ammonium-oxidizing bacterium ′Candidatus Brocadia sinica′ [J].Microbiology,2011,157(6):1706-1713.
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