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厌氧条件下不同种类污泥的释磷效果 预览
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作者 李水秀 朱静平 胡小宇 《西南科技大学学报》 CAS 2019年第2期39-44,共6页
采用A2O工艺的厌氧池污泥和好氧池污泥,以实际生活污水为处理对象,探讨不同种类污泥在厌氧条件下的释磷情况及其对污水中CODCr的去除效果。结果表明,在420min反应期间,厌氧污泥对污水中CODCr的去除效果总体优于好氧污泥,厌氧和好氧污泥... 采用A2O工艺的厌氧池污泥和好氧池污泥,以实际生活污水为处理对象,探讨不同种类污泥在厌氧条件下的释磷情况及其对污水中CODCr的去除效果。结果表明,在420min反应期间,厌氧污泥对污水中CODCr的去除效果总体优于好氧污泥,厌氧和好氧污泥对CODCr的去除率最高分别达到72.5%和50.0%;两种污泥的释磷速率随着反应时间的增加呈下降趋势,释磷量随反应时间的增加呈上升趋势;好氧污泥的释磷效果优于厌氧污泥,且前者的释磷速率大于后者的释磷速率,释磷速率最大值分别为0.26mg·(g·min)^-1,0.09mg·(g·min)^-1;达到相同释磷量时,好氧污泥所用时间短于厌氧污泥。 展开更多
关键词 厌氧 厌氧污泥 好氧污泥 释磷 CODCR
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Integration of Tropical Renewable Energies 预览
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作者 Daltro Garcia Pinatti Rosa Ana Conte +2 位作者 Thiago Hirosse Silva Luis Miguel Paulo Rodolpho de Oliveira Moreira 《能源与动力工程:英文版》 2019年第3期91-96,共6页
Main sources of renewable energy in the tropics are solar thermal and biomass.High-performance concrete(HPC)allows prefabrication of stakes,planks,boards,U-,L-,and I-profiles,prestressed thick-wall cylinders,and arc s... Main sources of renewable energy in the tropics are solar thermal and biomass.High-performance concrete(HPC)allows prefabrication of stakes,planks,boards,U-,L-,and I-profiles,prestressed thick-wall cylinders,and arc sectors.They are used to construct fences,level curves,buildings,contention walls,water and anaerobic tanks,and silos.Biomass production is increased by retention of rain water in the soil by level curves,in riparian tanks,and with fertigation.HPC anaerobic digesters produce biogas,biochar,and liquid fertilizer.Biogas is partially washed in medium-pressure vessel to obtain vehicular methane gas,which is partially burned in engine generator sets,whose combustion gases are fed into a boiler of a thermoelectric unit.The cycle is thermal solar regenerative Rankine cycle with heat recovery.Boiler receives hot water from thermal solar parabolic collectors,burns residual biomass and biochar generating steam for a turbogenerator set and combustion gas for condenser dryer silo,whose exhaustion heat goes to anaerobic digesters. 展开更多
关键词 HIGH-PERFORMANCE concrete profiles thermal solar-biomass energy generation biomass ANAEROBIC DIGESTER BIOGAS
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高γ-氨基丁酸岩茶加工工艺研究 预览
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作者 王芳 陈百文 《茶叶通讯》 北大核心 2019年第1期32-37,共6页
以茶树品种水仙驻芽三、四叶为原料,研究高γ-氨基丁酸(GABA)岩茶的加工工艺。单因素试验结果表明,谷氨酸溶液浓度、厌氧温度、厌氧时间、厌氧方法对GABA富集有较好的富集效果,且差异极显著(p <0.01)。以谷氨酸溶液浓度、厌氧时间和... 以茶树品种水仙驻芽三、四叶为原料,研究高γ-氨基丁酸(GABA)岩茶的加工工艺。单因素试验结果表明,谷氨酸溶液浓度、厌氧温度、厌氧时间、厌氧方法对GABA富集有较好的富集效果,且差异极显著(p <0.01)。以谷氨酸溶液浓度、厌氧时间和厌氧次数设置三因素三水平的正交试验,9个试验组中有6个试验组GABA含量高于150 mg/100 g(γ-氨基丁酸茶含量标准),其中以处理5 GABA含量最高为317.93 mg/100g,且感官品质较好,其处理工艺为:鲜叶喷洒0.2%谷氨酸(GLU)溶液,共摇青三次,每次摇青后真空厌氧1 h。 展开更多
关键词 真空厌氧 Γ-氨基丁酸 岩茶 加工工艺
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Aggravation of membrane fouling and methane leakage by a three-phase separator in an external anaerobic ceramic membrane bioreactor
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作者 Chao Pang Chunhua He +2 位作者 Zhenhu Hu Shoujun Yuan Wei Wang 《环境科学与工程前沿(英文)》 SCIE EI CAS CSCD 2019年第4期35-43,共9页
The three-phase separator is a critical component of high-rate anaerobic bioreactors due to its significant contribution in separation of biomass, wastewater, and biogas. However, its role in an anaerobic membrane bio... The three-phase separator is a critical component of high-rate anaerobic bioreactors due to its significant contribution in separation of biomass, wastewater, and biogas. However, its role in an anaerobic membrane bioreactor is still not clear. In this study, the distinction between an external anaerobic ceramic membrane bioreactor (EAnCMBR) unequipped (R1) and equipped (R2) with a three-phase separator was investigated in terms of treatment performance, membrane fouling, extracellular polymers of sludge, and microbial community structure. The results indicate that the COD removal efficiencies of Rl and R2 were 98.2%±0.4% and 98.1%±0.4%, respectively, but the start-up period of R2 was slightly delayed. Moreover, the membrane fouling rate of R2 (0.4 kPa/d) was higher than that of Rl (0.2 kPa/d). Interestingly, the methane leakage from R2 (0.1 L/d) was 20 times higher than that from Rl (0.005 L/d). The results demonstrate that the three-phase separator aggravated the membrane fouling rate and methane leakage in the EAnCMBR. Therefore, this study provides a novel perspective on the effects of a three-phase separator in an EAnCMBR. 展开更多
关键词 ANAEROBIC MEMBRANE BIOREACTOR Three-phase separator MEMBRANE fouling METHANE LEAKAGE Sludge property
Enhanced Biogas Production from the Anaerobic Batch Treatment of Banana Peels 预览
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作者 Spyridon Achinas Janneke Krooneman Gerrit Jan Willem Euverink 《工程(英文)》 2019年第5期970-978,共9页
Waste disposal management and the energy crisis are important challenges facing most countries.The fruit-processing industry generates daily several tons of wastes,of which the major share comes from banana farms.Anae... Waste disposal management and the energy crisis are important challenges facing most countries.The fruit-processing industry generates daily several tons of wastes,of which the major share comes from banana farms.Anaerobic digestion(AD)technology has been applied to the treatment of wastewater,animal slurry,food waste,and agricultural residues,with the primary goals of energy production and waste elimination.This study examines the effect of organic loading(OL)and cow manure(CM)addition on AD performance when treating banana peel waste(BPW).The maximum daily biogas production rates of banana peels(BPs)with a CM content of 10%,20%,and 30%at 18 and 22 g of volatile solids(gvs)per liter were 50.20,48.66,and 62.78 mL(gvs.d)^-1 and 40.49,29.57,and 46.54 mL(gvs.d)^-1,respectively.However,the daily biogas yield showed no clear interdependence with OL or CM content.In addition,a kinetic analysis using first-order and cone models showed that the kinetic parameters can be influenced by the process parameters. 展开更多
关键词 BIOGAS Banana peels Cow manure Anaerobic treatment Batch test Kinetic study
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Understanding the Removal and Fate of Selected Drugs of Abuse in Sludge and Biosolids from Australian Wastewater Treatment Operations 预览
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作者 Meena K·Yadav Cobus Gerber +2 位作者 Christopher P·Saint Ben Van den Akker Michael D·Short 《工程(英文)》 2019年第5期872-879,共8页
Illicit and pharmaceutical drugs are considered to be emerging contaminants of concern,and much research effort has gone into assessing their occurrence in wastewater.However,little information exists on their presenc... Illicit and pharmaceutical drugs are considered to be emerging contaminants of concern,and much research effort has gone into assessing their occurrence in wastewater.However,little information exists on their presence in treated sludge or biosolids.In this study,we examined sludge and biosolids from a large metropolitan wastewater treatment plant(WWTP)in Australia to determine the occurrence of five drugs of abuse,including benzoylecgonine as indicator of cocaine consumption,methamphetamine and 3,4-methylenedioxy methamphetamine(MDMA)as representative illicit stimulants,and codeine and morphine as pharmaceuticals with potential environmental risk.The samples were solid-phase extracted and analyzed by liquid chromatography–tandem mass spectrometry(LC–MS/MS).Benzoylecgonine and MDMA were present in raw sludge but were notably degraded during solids treatment processes,and were not detected in the dewatered sludge(after treatment)or in biosolids.Methamphetamine,codeine,and morphine were detected in all biosolids samples at mean concentrations of 20–50 lgkg^-1.The presence of these three drugs in biosolids shows that these compounds are relatively stable in the solids and in soil,and can persist in biosolids for at least several years.A simple environmental risk assessment based on estimated risk quotients(RQs)for these compounds indicated that the potential environmental risks associated with the land application of biosolids are very low at typical Australian biosolids application rates. 展开更多
关键词 Anaerobic digestion BIOSOLIDS Contamination METHAMPHETAMINE SORPTION
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Metal-dependent anaerobic methane oxidation in marine sediment:insights from marine settings and other systems
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作者 Lewen Liang Yinzhao Wang +1 位作者 Orit Sivan Fengping Wang 《中国科学:生命科学英文版》 SCIE CAS CSCD 2019年第10期1287-1295,共9页
Anaerobic oxidation of methane(AOM) plays a crucial role in controlling global methane emission. This is a microbial process that relies on the reduction of external electron acceptors such as sulfate, nitrate/nitrite... Anaerobic oxidation of methane(AOM) plays a crucial role in controlling global methane emission. This is a microbial process that relies on the reduction of external electron acceptors such as sulfate, nitrate/nitrite, and transient metal ions. In marine settings, the dominant electron acceptor for AOM is sulfate, while other known electron acceptors are transient metal ions such as iron and manganese oxides. Despite the AOM process coupled with sulfate reduction being relatively well characterized,researches on metal-dependent AOM process are few, and no microorganism has to date been identified as being responsible for this reaction in natural marine environments. In this review, geochemical evidences of metal-dependent AOM from sediment cores in various marine environments are summarized. Studies have showed that iron and manganese are reduced in accordance with methane oxidation in seeps or diffusive profiles below the methanogenesis zone. The potential biochemical basis and mechanisms for metal-dependent AOM processes are here presented and discussed. Future research will shed light on the microbes involved in this process and also on the molecular basis of the electron transfer between these microbes and metals in natural marine environments. 展开更多
关键词 ANAEROBIC methane oxidation metal-AOM MARINE sediment ARCHAEA electron transfer
Anaerobic phenanthrene biodegradation with four kinds of electron acceptors enriched from the same mixed inoculum and exploration of metabolic pathways
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作者 Zuotao Zhang Chongyang Wang +1 位作者 Jianzhong He Hui Wang 《环境科学与工程前沿(英文)》 SCIE EI CAS CSCD 2019年第5期175-186,共12页
Polycyclic aromatic hydrocarbons (PAHs) are widespread and persistent contaminants worldwide, especially in environments devoid of molecular oxygen. For lack of molecular oxygen, researchers enhanced anaerobic zones P... Polycyclic aromatic hydrocarbons (PAHs) are widespread and persistent contaminants worldwide, especially in environments devoid of molecular oxygen. For lack of molecular oxygen, researchers enhanced anaerobic zones PAHs biodegradation by adding sulfate, bicarbonate, nitrate, and iron. However, microbial community reports of them were limited, and information of metabolites was poor except two-ring PAH, naphthalene. Here, we reported on four phenanthrene-degrading enrichment cultures with sulfate, bicarbonate, nitrate, and iron as electron acceptors from the same initial inoculum. The high-to-low order of the anaerobic phenanthrene biodegradation rate was the nitrate-reducing conditions>sulfate-reducing conditions>methanogenic conditions>iron-reducing conditions. The dominant bacteria populations were Desulfobacteraceae, Anaerolinaceae, and Thermodesulfobiaceae under sulfate-reducing conditions;Moraxellaceae, Clostridiaceae, and Comamonadaceae under methanogenic conditions;Rhodobacteraceae, Planococcaceae, and Xanthomonadaceae under nitrate-reducing conditions;and Geobacteraceae, Carnobacteriaceae, and Anaerolinaceae under iron-reducing conditions, respectively. Principal component analysis (PCA) indicated that bacteria populations of longtime enriched cultures with four electron acceptors all obtained significant changes from original inoculum, and bacterial communities were similar under nitrate-reducing and iron-reducing conditions. Archaea accounted for a high percentage under iron-reducing and methanogenic conditions, and Methanosarcinaceae and Methanobacteriaceae, as well as Methanobacteriaceae, were the dominant archaea populations under iron-reducing and methanogenic conditions. The key steps of phenanthrene biodegradation under four reducing conditions were carboxylation, further ring system reduction, and ring cleavage. 展开更多
关键词 PHENANTHRENE Anaerobic biodegradation Bacterial populations Archaea populations Metabolic pathway
Sedimentary geochemical proxies for methane seepage at Site C14 in the Qiongdongnan Basin in the northern South China Sea 预览
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作者 Tiantian Sun Daidai Wu +3 位作者 Fei Yang Lihua Liu Xuegang Chen Ying Ye 《海洋学报:英文版》 SCIE CAS CSCD 2019年第7期84-95,共12页
Recent studies have shown that specific geochemical characteristics of sediments can be used to reconstruct past methane seepage events.In this work,the correlation between the Sr/Ca and Mg/Ca ratios of sediment sampl... Recent studies have shown that specific geochemical characteristics of sediments can be used to reconstruct past methane seepage events.In this work,the correlation between the Sr/Ca and Mg/Ca ratios of sediment samples is analyzed and the sulfate concentration profile in Site C14 from cold-seep sediments in the Qiongdongnan Basin in northern South China Sea is obtained.The results confirmed that,sulfate at 0–247 cm below sea floor(Unit I)is mainly consumed by organic matter sulfate reduction(OSR),while sulfate at 247–655 cm(UnitⅡ)is consumed by both the OSR and the anaerobic oxidation of methane(AOM).In addition,the bottom sediment layer is affected by weak methane seepage.The Mo and U enrichment factors also exhibit similar trends in their respective depth profiles.The responses of trace elements,including Co/Al,Ni/Al,Cr/Al and Zn/Al ratios to methane seepage allowed the study of depositional conditions and methane seepage events.Based on the results,it is speculated that the depositional conditions of UnitⅡchanged with depth from moderate conditions of sulfidic and oxic conditions to locally anoxic conditions,and finally to suboxic conditions due to methane fluid leakage.The stable isotope values of chromium-reducible sulfide produced by AOM and those of sulfide formed by OSR in the early diagenetic environment suffered serious depletion of 34S.This was probably due to weak methane leakage,which caused the slower upward diffusion and the effect of early diagenesis on the samples.It is necessary to consider the effects of depositional environments and diagenesis on these geochemical parameters. 展开更多
关键词 Qiongdongnan Basin trace elements stable ISOTOPE values ANAEROBIC oxidation of METHANE METHANE activity
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反硝化聚磷菌的培养富集及处理生活污水的稳定运行 预览
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作者 王琦 赵骥 +3 位作者 但琼鹏 李夕耀 张琼 彭永臻 《化工学报》 EI CAS CSCD 北大核心 2019年第12期4828-4834,共7页
在厌氧-好氧交替运行的序批式反应器(sequencing batch reactor,SBR)中,以C/P比大于50的实际生活污水为进水,成功驯化富集聚磷菌,平均厌氧释磷量为15 mg·L^-1,出水PO4^3--P浓度稳定小于0.5 mg·L^-1。在系统运行的第74 d调整... 在厌氧-好氧交替运行的序批式反应器(sequencing batch reactor,SBR)中,以C/P比大于50的实际生活污水为进水,成功驯化富集聚磷菌,平均厌氧释磷量为15 mg·L^-1,出水PO4^3--P浓度稳定小于0.5 mg·L^-1。在系统运行的第74 d调整运行模式为厌氧-缺氧-好氧,在缺氧开始时短期投加NO3^--N配水以驯化培养反硝化聚磷菌。保持系统内NO3^--N浓度不变,在进水COD浓度为250 mg·L^-1时,反硝化除磷效果最佳,平均反硝化除磷量占除磷量的比为87.1%。不同pH下反硝化除磷速率的小试证明,在pH=7.0时得到最大的比吸磷速率2.1 mg P·(g VSS·h)^-1。此时调整NO3--N进水为另一个全程硝化反应器的出水,并加大排水比增加缺氧初的进水量使得反应器内缺氧时的pH接近7.0,与未改变pH时对比表明前者在缺氧段反硝化除磷速率加快。反应器共运行160 d,稳定完成COD的去除与反硝化除磷过程。 展开更多
关键词 反硝化聚磷菌 厌氧 缺氧 曝气 富集
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烟气脱硫中间产物CaSO3无氧热分解的研究 预览
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作者 袁晓东 杨忠 +6 位作者 董林 齐誉 乔秀文 洪成林 李洪玲 王金玉 但建明 《石河子大学学报:自然科学版》 CAS 北大核心 2019年第1期73-78,共6页
为减少烟气脱硫产物的污染和实现钙硫资源的回收利用,同时简化现有的脱硫工艺,提出将烟气脱硫中间产物CaSO3进行无氧热分解为CaO和SO2的循环利用途径。本文研究以热分解产物CaO含量为主要考察指标,探究影响CaSO3热分解的条件。实验结果... 为减少烟气脱硫产物的污染和实现钙硫资源的回收利用,同时简化现有的脱硫工艺,提出将烟气脱硫中间产物CaSO3进行无氧热分解为CaO和SO2的循环利用途径。本文研究以热分解产物CaO含量为主要考察指标,探究影响CaSO3热分解的条件。实验结果表明:在无氧高温条件下,CaSO3热分解为CaO和SO2,热分解的优化条件为:N2气氛、热分解温度1150℃、热分解时间2h、热分解升温速率6℃/min、N2流量80mL/min,热分解产物CaO含量为99.32%。烟气脱硫中间产物CaSO3的无氧热分解,具有明显的环保和经济价值,其应用前景广阔。 展开更多
关键词 CaSO3 烟气脱硫 无氧 热分解 优化条件
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生物技术处理印染废水研究进展 预览 被引量:1
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作者 张兵 《印染助剂》 CAS 北大核心 2019年第4期10-12,共3页
介绍了生物技术处理印染废水的原理,着重阐述了好氧生物技术、厌氧生物技术、好氧-厌氧生物技术、生物技术与其他手段联合处理印染废水的研究进展,并对生物技术处理印染废水的发展方向进行探究。
关键词 印染废水 生物技术 好氧 厌氧
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精细化工废水提标升级改造工程实例
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作者 江晓宇 《现代化工》 CAS CSCD 北大核心 2019年第10期182-185,共4页
以某精细化工企业废水处理工程为例,介绍了'物化-混凝-厌氧氧化-水解酸化-两级接触氧化—MBR生化处理工艺'处理精细化工废水的工程应用案例,对工程设计及运行经验方面进行分析总结;设计处理水量为600 m3/d,运行结果表明,综合污... 以某精细化工企业废水处理工程为例,介绍了'物化-混凝-厌氧氧化-水解酸化-两级接触氧化—MBR生化处理工艺'处理精细化工废水的工程应用案例,对工程设计及运行经验方面进行分析总结;设计处理水量为600 m3/d,运行结果表明,综合污水CODCr、NH3-N、SS的去除率分别达到97. 8%、79. 2%、90. 6%。出水口各项指标均可满足GB 8978—1996《污水综合排放标准》中的一级排放标准。 展开更多
关键词 厌氧 水解酸化 接触氧化 MBR
Biofiltration of the antibacterial drug sulfamethazine by the species Chenopodium quinoa and its further biodegradation through anaerobic digestion
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作者 Ariel E.Turcios Jutta Papenbrock 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第1期54-63,共10页
The biofiltering capacity, distribution patterns and degradation of the antimicrobial sulfamethazine(SMT) by halophyte Chenopodium quinoa under hydroponic conditions and its further biodegradation through anaerobic di... The biofiltering capacity, distribution patterns and degradation of the antimicrobial sulfamethazine(SMT) by halophyte Chenopodium quinoa under hydroponic conditions and its further biodegradation through anaerobic digestion were evaluated. C. quinoa was cultivated for a complete life cycle under different concentrations of SMT(0, 2 and 5 mg/L) and sodium chloride(0 and 15 g/L). C. quinoa is able to uptake and partially degrade SMT. The higher the SMT concentration in the culture medium, the higher the SMT content in the plant tissue. SMT has different distribution patterns within the plant organs, and no SMT is found in the seeds.Dry crop residues containing SMT have a great potential to produce methane through anaerobic digestion and, in addition, SMT is further biodegraded. The highest specific methane yields are obtained using crop residues of the plants cultivated in the presence of salt and SMT with concentrations between 0 and 2 mg/L. 展开更多
关键词 Anaerobic digestion CHENOPODIUM QUINOA FISH analysis Phytoremediation SULFAMETHAZINE BIODEGRADATION
艰难梭菌中粪肠球菌污染的去除方法 预览
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作者 饶凤琴 程玉梅 +4 位作者 张婷 周青帅 崔古贞 齐晓岚 洪伟 《贵州医科大学学报》 CAS 2019年第10期1122-1127,1133共7页
目的:建立从粪肠球菌-艰难梭菌混合培养物中分离艰难梭菌的方法。方法:取不同厂家脑心浸出液(BHI)培养基、不同抗生素和是否添加羊血(或血清)3种组分进行组合,加入粪肠球菌-艰难梭菌混合物进行培养;显微镜观察不同组分培养基中细菌形态... 目的:建立从粪肠球菌-艰难梭菌混合培养物中分离艰难梭菌的方法。方法:取不同厂家脑心浸出液(BHI)培养基、不同抗生素和是否添加羊血(或血清)3种组分进行组合,加入粪肠球菌-艰难梭菌混合物进行培养;显微镜观察不同组分培养基中细菌形态,将不同组分培养基中获得的混合培养物划线固体平板培养基并培养、观察菌落形态及菌落气味,采用16SrDNA测序技术评价不同组合培养基对艰难梭菌的纯化效果。结果:艰难梭菌抗生素抗性实验结果显示,艰难梭菌对氯霉素、克拉霉素和氨苄青霉素敏感,对四环素、D-环丝氨酸和头孢西丁具有抗性;在相同艰难梭菌接种量条件下,不同生产厂家BHI-酵母粉培养基(BHIS)均有艰难梭菌典型的沉淀生成,并伴有浓烈臭鸡蛋气味;显微镜观察发现纯化前艰难梭菌与粪肠球菌共培养物有大量球菌和链球菌、少量杆菌;BHIS-BDC培养基所有视野中无球菌,仅见杆状细菌;BHIS培养基上艰难梭菌仅在平板边缘形成零星菌落,BHIS-BDC培养基表面形成典型艰难梭菌菌落;16SrDNA测序结果表明1~2mm菌落为粪肠球菌,3~5mm菌落为艰难梭菌。结论:不同生产厂家的BHIS培养基对艰难梭菌中粪肠球菌的去除没有明显差异,BHIS培养基中添加羊血、D-环丝氨酸与头孢西丁复合抗生素可去除艰难梭菌中粪肠球菌污染。 展开更多
关键词 肠球菌 梭菌感染 培养基 重症监护病房 结肠炎 细菌 厌氧
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厌氧反硝化产甲烷体系中喹啉与吲哚共基质的降解特性 预览
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作者 高艳娟 岳秀萍 +3 位作者 段燕青 张智春 张潇 罗艳红 《中国环境科学》 EI CAS CSCD 北大核心 2019年第10期4150-4156,共7页
研究了厌氧反硝化产甲烷体系中,典型含氮杂环化合物喹啉、吲哚作为共基质碳源,厌氧生物对二者的降解特性,及群落分析.结果表明:在共基质条件下,喹啉的存在对吲哚的生物降解有抑制作用,且抑制随喹啉浓度的升高而升高;吲哚的存在对喹啉的... 研究了厌氧反硝化产甲烷体系中,典型含氮杂环化合物喹啉、吲哚作为共基质碳源,厌氧生物对二者的降解特性,及群落分析.结果表明:在共基质条件下,喹啉的存在对吲哚的生物降解有抑制作用,且抑制随喹啉浓度的升高而升高;吲哚的存在对喹啉的生物降解有促进作用,但吲哚浓度过高(150mg/L)抑制了喹啉的降解;喹啉、吲哚共基质时,二者的降解都遵循零级反应动力学;通过GC-MS分析,喹啉的主要中间代谢产物分别为2(1H)喹诺酮与8-羟基-2(1H)喹诺酮;吲哚的主要代谢产物为2-吲哚酮与靛红;通过高通量测序对共基质体系的微生物群落进行分析,发现厌氧功能菌群得到富集,细菌菌门以变形菌门Proteobacteria为主,菌纲以Gammaproteobacteria和Betaproteobacteria为主,菌属以Acinetobacter,Candidimonas,Azospira,和Desulfomicrobium为主. 展开更多
关键词 厌氧 反硝化产甲烷 共基质 中间产物 微生物群落
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中亚热带森林土壤N2O消耗潜势及其控制因素研究
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作者 朱思佳 马莹玲 +3 位作者 高人 马红亮 尹云锋 杨柳明 《环境科学学报》 CAS CSCD 北大核心 2019年第5期1673-1681,共9页
为了量化森林土壤N2O消耗潜势并探讨其可能控制因素,选取中亚热带4种典型森林(建瓯的杉木人工林、罗浮栲天然林、米槠林及武夷山的米槠林)植被覆盖下的土壤,设置8个处理(预处理、基线处理、添加葡萄糖处理、添加NO-3处理、非淋洗处理、... 为了量化森林土壤N2O消耗潜势并探讨其可能控制因素,选取中亚热带4种典型森林(建瓯的杉木人工林、罗浮栲天然林、米槠林及武夷山的米槠林)植被覆盖下的土壤,设置8个处理(预处理、基线处理、添加葡萄糖处理、添加NO-3处理、非淋洗处理、不添加N2O处理、添加N2O好气鲜土处理、不添加N2O好气鲜土处理)进行室内培养实验.结果表明,厌氧条件下,在水分饱和、氮有效性低及添加外源N2O时具有较大的N2O消耗潜势.在上述条件下进行培养的土壤N2O净通量在4种森林类型之间与两个土层之间均具有显著差异.添加外源硝态氮能显著降低土壤N2O消耗,甚至出现N2O排放现象(净通量高达2.19~2.38μg·g^-1·h^-1);不添加外源N2O也能显著降低土壤N2O消耗.建瓯米槠林表层土具有较大的TC、TN及NH+4含量,结果表明,该种土壤具有较大的N2O消耗潜力(净通量约为-1.39μg·g^-1·h^-1). 展开更多
关键词 中亚热带 森林土壤 N2O消耗 反硝化作用 厌氧
聚糖菌反硝化影响因素及内碳源转化特性 预览
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作者 刘小芳 郭海燕 +1 位作者 张胜男 黄靓 《化工学报》 EI CAS CSCD 北大核心 2019年第3期1127-1134,共8页
在SBR反应器中以乙酸钠为碳源、NO3^﹣-N为电子受体成功富集了反硝化聚糖菌,并采用批次实验进一步考察了进水C/N比(3.3,6.7,10)、电子受体(NO3^﹣-N、NO2^﹣-N)、碳源类型(乙酸钠、葡萄糖)对反硝化聚糖菌活性的影响及内碳源转化特性。... 在SBR反应器中以乙酸钠为碳源、NO3^﹣-N为电子受体成功富集了反硝化聚糖菌,并采用批次实验进一步考察了进水C/N比(3.3,6.7,10)、电子受体(NO3^﹣-N、NO2^﹣-N)、碳源类型(乙酸钠、葡萄糖)对反硝化聚糖菌活性的影响及内碳源转化特性。实验结果表明,进水C/N比越高,系统NOx^﹣-N去除率越高,厌氧段合成PHB越多,但进水C/N比过高会导致普通反硝化菌占优势,影响内碳源反硝化效率,进水C/N比为6.7较为合适;以NO3^﹣-N为电子受体长期培养的DGAOs系统未经NO2^﹣-N驯化,对NO2^﹣-N同样具有良好的反硝化性能,在投加与NO3^﹣-N相同浓度的NO2^﹣-N后,系统NOx^﹣-N去除率达89.6%;当以葡萄糖为碳源时,DPAOs在厌氧段合成的PHB的量仅为以乙酸钠为碳源时合成PHB量的79.5%,且厌氧段葡萄糖利用率仅为72.8%,远远小于乙酸钠的利用率。 展开更多
关键词 反硝化聚糖菌 内碳源反硝化 聚合物 厌氧 吸收
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印染废水厌氧生物处理技术的研究进展 预览
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作者 王庭 肖小兰 +2 位作者 周云龙 王远飞 阮文权 《广东化工》 CAS 2019年第3期151-152,共2页
厌氧生物技术是处理印染废水的有效方法,本文从厌氧反应器处理工艺、印染废水厌氧降解机理、高效菌种的筛选和应用这三个方面对印染废水厌氧生物处理技术进行了总结。并且针对当前存在的问题,提出了印染废水厌氧生物处理的未来研究方向。
关键词 印染废水 厌氧 生物处理
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微藻处理压裂返排液的效果及影响因素
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作者 李冉 潘杰 +3 位作者 张丽 谢娟 杨江 秦文龙 《水处理技术》 CAS CSCD 北大核心 2019年第2期72-75,共4页
针对压裂返排液污染物成分复杂、含量高,对环境污染严重的特点,采用小球藻好氧处理结合聚合氯化铝(PAC)混凝、颗粒污泥厌氧处理压裂返排液结果表明,压裂返排液可生化性差,小球藻直接处理返排液COD去除率仅为5.85%,返排液培养小球藻96 h... 针对压裂返排液污染物成分复杂、含量高,对环境污染严重的特点,采用小球藻好氧处理结合聚合氯化铝(PAC)混凝、颗粒污泥厌氧处理压裂返排液结果表明,压裂返排液可生化性差,小球藻直接处理返排液COD去除率仅为5.85%,返排液培养小球藻96 h后藻株进入对数期增殖,最大藻密度为1.19 g/L。混凝处理可以有效去除返排液中有机物污染物,混凝出水培养小球藻72 h后藻株进入对数期增殖,最大藻密度为1.03 g/L,返排液经混凝、小球藻处理后COD去除率为68.63%。颗粒污泥厌氧处理可以进一步去除返排液混凝出水有机污染物,厌氧出水培养小球藻24 h后藻株快速增殖,最大藻密度为0.35 g/L,返排液经混凝、厌氧和小球藻处理后,COD去除率可达92.16%。 展开更多
关键词 小球藻 压裂返排液 生物处理 混凝 厌氧
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