短程硝化污泥的基质抑制与重金属抑制特性研究
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- 英文论文题名：Inhibition of Cu(Ⅱ), As(Ⅲ) to shortcut nitrification sludge
- 论文作者：段程珊 ; 柴立元 ; 唐崇俭 ; 余诚 ; 宋雨夏
- 年：2016
- 作者机构：中南大学冶金与环境学院;国家重金属污染防治工程技术研究中心;
- 论文关键词：短程硝化 ; 铜 ; 砷 ; 抑制
- 英文论文关键词：Shortcut nitrification ; ncopper ; arsenic ; inhibition
- 会议召开时间：2016-12-01
- 会议录名称：第六届重金属污染防治及风险评价研讨会暨重金属污染防治专业委员会2016年学术年会论文集
- 语种：中文
- 分类号：X703
- 学会代码：HJKP
- 会议名称：第六届重金属污染防治及风险评价研讨会暨重金属污染防治专业委员会2016年学术年会
- 会议地点：中国福建厦门
- 主办单位：中国环境科学学会
- 学会名称：中国环境科学学会
- 页数：8
- 文件大小：11992k
- 原文格式：D
- 会议级别：全国
摘要
控制气升式反应器的进水氨氮浓度为200-300mg/l,DO浓度为1.0-1.5mg/l逐步将HRT从36h缩短至12h,获得的容积氨氮负荷达到0.46kg/(m~3.d)。分别以DO和NO_2~--N浓度变化为指标,采用批次实验研究了高效短程硝化污泥的基质动力学特性,结果表明,两种不同评价方法均符合基质抑制动力学模型(Haldane模型拟合),拟合得到K_(s,NH4+-N)分别为1.99mmol/L(即27.89mg/l)和0.83mmol/L(即11.62mg/l),K_(I,NH4+-N)为7.19mmol/L(即100.66mg/l)和16.24mmol/L(即227.36mg/l)。研究了重金属阳离子Cu(Ⅱ)和阴离子As(Ⅲ)对高效短程硝化污泥的抑制特性。研究发现Cu(Ⅱ)对硝化污泥活性的抑制作用远超过As(Ⅲ)。污泥表面带负电荷,更容易与重金属阳离子发生相互作用进而强化抑制;另一方面,As(Ⅲ)在硝化体系中存在被氧化为As(V)的可能性,进而降低了其抑制效果。
Controlling air lift reactor inlet ammonia nitrogen concentration 200-300 mg/l,the DO concentration from 1.0 to 1.5mg/l,shorting HRT from 36 h to 12 h, achiving the volume load of ammonia nitrogen 0.46 kg/(m~3. d).Respectively,DO and NO_2~--N concentration changes as an index, batch experiments were carried out to study the effective shortcut nitrification matrix dynamic characteristics of the sludge, and the results showed that the two different evaluation methods are in line with the substrate inhibition kinetic model(Haldane model fitting), K_(s, NH4+-N) were 1.99mmol/L and 0.83mmol/L,K_(I,NH4+-N) were 7.19mmol/L and 16.24mmol/L.Studied the heavy metal cation Cu(II) and anionic As(III) for effective shortcut nitrification inhibition of the sludge characteristics.The study found that Cu(II) inhibition activity of nitrifying sludge is far more than the As(III).Negatively charged on the surface of the sludge, are more likely to interact with heavy metal cations and strengthening inhibition;As(III) in the nitration system, on the other hand, there are in the oxidation of the As(V), and thus its inhibition effect was weaken.
Controlling air lift reactor inlet ammonia nitrogen concentration 200-300 mg/l,the DO concentration from 1.0 to 1.5mg/l,shorting HRT from 36 h to 12 h, achiving the volume load of ammonia nitrogen 0.46 kg/(m~3. d).Respectively,DO and NO_2~--N concentration changes as an index, batch experiments were carried out to study the effective shortcut nitrification matrix dynamic characteristics of the sludge, and the results showed that the two different evaluation methods are in line with the substrate inhibition kinetic model(Haldane model fitting), K_(s, NH4+-N) were 1.99mmol/L and 0.83mmol/L,K_(I,NH4+-N) were 7.19mmol/L and 16.24mmol/L.Studied the heavy metal cation Cu(II) and anionic As(III) for effective shortcut nitrification inhibition of the sludge characteristics.The study found that Cu(II) inhibition activity of nitrifying sludge is far more than the As(III).Negatively charged on the surface of the sludge, are more likely to interact with heavy metal cations and strengthening inhibition;As(III) in the nitration system, on the other hand, there are in the oxidation of the As(V), and thus its inhibition effect was weaken.
引文
1.杨世东,碳源对含盐废水短程硝化反硝化的影响.环境污染与防治,2011:p.42-46.
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5 .Andrianisa,H.A.,et al.,Biotransformation of arsenic species by activated sludge and removal of bio-oxidised arsenate from wastewater by coagulation with ferric chloride.Water Res,2008.42(19):p.4809-4817.
6 .F.Battaglia-Brunet1,M.-C.D.,F.Garrido1,C.Crouzet2,D.Morin1,K.Dekeyser3,M.Clarens4 and P.Baranger1,An arsenic(III)-oxidizing bacterial population:selection,characterization,and performance in reactors.Journal of Applied Microbiology,2002:p.656-667.
7 .Ito,A.,et al.,Biological oxidation of arsenite in synthetic groundwater using immobilised bacteria.Water Res,2012.46(15):p.4825-4831.
8 .Ye,J.,et al.,Arsenic biomethylation by photosynthetic organisms.Trends Plant Sci,2012.17(3):p.155-162.
2 .张可方,铜对活性污泥微生物活性影响研究.环境工程学报,2010:p.1710-1713.
3 .Weon,S.Y.,B.Koopman,and S.I.Lee,Effects of toxicants on nitrifying biomass in flocs vs.carriers.Environ Technol,2004.25(2):p.193-199.
4 .Tang,C.J.,et al.,Performance of high-loaded ANAMMOX UASB reactors containing granular sludge.Water Res,2011.45(1):p.135-44.
5 .Andrianisa,H.A.,et al.,Biotransformation of arsenic species by activated sludge and removal of bio-oxidised arsenate from wastewater by coagulation with ferric chloride.Water Res,2008.42(19):p.4809-4817.
6 .F.Battaglia-Brunet1,M.-C.D.,F.Garrido1,C.Crouzet2,D.Morin1,K.Dekeyser3,M.Clarens4 and P.Baranger1,An arsenic(III)-oxidizing bacterial population:selection,characterization,and performance in reactors.Journal of Applied Microbiology,2002:p.656-667.
7 .Ito,A.,et al.,Biological oxidation of arsenite in synthetic groundwater using immobilised bacteria.Water Res,2012.46(15):p.4825-4831.
8 .Ye,J.,et al.,Arsenic biomethylation by photosynthetic organisms.Trends Plant Sci,2012.17(3):p.155-162.