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期刊论文 42

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Enhanced dewatering characteristics of waste activated sludge with Fenton pretreatment: effectiveness

Guangyin ZHEN, Xueqin LU, Baoying WANG, Youcai ZHAO, Xiaoli CHAI, Dongjie NIU, Tiantao ZHAO

《环境科学与工程前沿（英文）》 2014年 第8卷 第2期   页码 267-276 doi: 10.1007/s11783-013-0530-3

摘要： In this work, the enhanced dewaterabing characteristics of waste activated sludge using Fenton pretreatment was investigated in terms of effectiveness and statistical optimization. Response surface method (RSM) and central composite design (CCD) were applied to evaluate and optimize the effectiveness of important operational parameters, i.e., H O concentrations, Fe concentrations and initial pH values. A significant quadratic polynomial model was obtained ( 0.9189) with capillary suction time (CST) reduction efficiency as the response. Numerical optimization based on desirability function was carried out. The optimum values for H O , Fe , and initial pH were found to be 178 mg·g VSS (volatile suspended solids), 211 mg·g VSS and 3.8, respectively, at which CST reduction efficiency of 98.25% could be achieved. This complied well with those predicted by the established polynomial model. The results indicate that Fenton pretreatment is an effective technique for advanced waste activated sludge dewatering. The enhancement of sludge dewaterability by Fenton’s reagent lies in the migration of sludge bound water due to the disintegration of sludge flocs and microbial cells lysis.

关键词： Fenton pretreatment     response surface methodology (RSM)     capillary suction time (CST)     dewaterabilty     molecular weight distribution    

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Biological pretreatment of corn stover by solid state fermentation of

Jian ZHANG, Xin REN, Wenqun CHEN, Jie BAO

《化学科学与工程前沿（英文）》 2012年 第6卷 第2期   页码 146-151 doi: 10.1007/s11705-012-1220-6

摘要： Biological pretreatment is a promising way to overcome the biorecalcitrance of cleaving the supermolecular structure of lignocellulose by lignin degrading enzymes from microorganisms. Solid state fermentation of corn stover with the white-rot fungus was carried out and the efficiency of this pretreatment was evaluated. The enzymatic hydrolysis yield reached a maximum when the corn stover was biologically pretreated for nine days, and the hydrolysis yield decreased sharply if the solid state fermentation was carried out for more than nine days. A possible explanation for this sharp decrease is that not only the lignin degrading enzymes (LiP and MnP) were secreted, but also other metabolites, which were toxic or fatal to the hydrolysis enzymes resulting in the lower hydrolysis yield were generated during the prolonged period of biopretreatment. These results are useful to help determine the optimal timing and to understand the lignin structure and degradation mechanism in biological pretreatment processes.

关键词： biological pretreatment     Phanerochaete chrysosporium     solid state fermentation     biorecalcitrance     hydrolysis yield    

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木质纤维原料制乙醇原料预处理技术

靳胜英,张福琴,张礼安

《中国工程科学》 2008年 第10卷 第11期   页码 82-88

摘要：

从预处理的必要性出发，论述了木质纤维原料的预处理技术，分析了主要预处理技术的特点和处理纤维质原料的效果，并对未来预处理技术的发展方向提出了建议，供从事木质纤维素制乙醇的研究人员参考。

关键词： 木质纤维原料     乙醇     预处理技术    

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Thermochemical pretreatment of meat and bone meal and its effect on methane production

Guangxue WU , Zhenhu HU , Mark G. HEALY , Xinmin ZHAN ,

《环境科学与工程前沿（英文）》 2009年 第3卷 第3期   页码 300-306 doi: 10.1007/s11783-009-0031-6

摘要： Since the solubilization of meat and bone meal (MBM) is a prerequisite in many MBM disposal approaches, enhancement of the solubilization by means of thermochemical pretreatment was investigated in this study at two temperatures (55°C and 131°C) and six sodium hydroxide (NaOH) concentrations (0, 1.25, 2.5, 5, 10 and 20g/L). The MBM volatile solid (VS) reduction ratio was up to 66% and 70% at 55°C and 131°C, respectively. At the same temperature, the VS reduction ratio increased with the increase in the dosage of NaOH. The study on the methane (CH) production potential of pretreated MBM shows that the addition of NaOH at 55°C did not cause the inhibition of the succeeding CH production process. However, CH production was inhibited by the addition of NaOH at 131°C. The CH production potential was in the range of 389 to 503mL CH/g VS MBM and 464 to 555mL CH/g VS MBM at 55°C and 131°C, respectively.

关键词： thermochemical pretreatment     meat and bone meal     solid reduction     solid solubilization     methane production potential    

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Optimization of microwave pretreatment of lignocellulosic waste for enhancing methane production: Hyacinth

Bai-Hang Zhao, Jie Chen, Han-Qing Yu, Zhen-Hu Hu, Zheng-Bo Yue, Jun Li

《环境科学与工程前沿（英文）》 2017年 第11卷 第6期 doi: 10.1007/s11783-017-0965-z

摘要： The effect of microwave pretreatment on the anaerobic degradation of hyacinth was investigated using response surface methodology (RSM). The components of lignin and the other constituents of hyacinth were altered by microwave pretreatment. Comparison of the near-infrared spectra of hyacinth pretreated by microwave irradiation and water-heating pretreatment revealed that no new compounds were generated during hyacinth pretreatment by microwave irradiation. Atomic force microscopy observations indicated that the physical structures of hyacinth were disrupted by microwave pretreatment. The yield of methane per gram of the microwave-irradiated substrate increased by 38.3% as compared to that of the substrate pretreated via water-heating. A maximum methane yield of 221 mL·g-sub was obtained under the optimum pretreatment conditions (substrate concentration (PSC) = 20.1 g·L and pretreatment time (PT) = 14.6 min) using RSM analysis. A maximum methane production rate of 0.76 mL·h ·g-sub was obtained by applying PSC= 9.5 g·L and PT= 11 min. Interactive item coefficient analysis showed that methane production was dependent on the PSC and PT, separately, whereas the interactive effect of the PSC and PT on methane production was not significant. The same trend was also observed for the methane production rate.

关键词： Microwave pretreatment     Response surface methodology     Methane production     Hyacinth     Anaerobic digestion    

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Effect of thermal pretreatment on the surface structure of PtSn/SiO

Guozhen Xu, Jian Zhang, Shengping Wang, Yujun Zhao, Xinbin Ma

《化学科学与工程前沿（英文）》 2016年 第10卷 第3期   页码 417-424 doi: 10.1007/s11705-016-1583-1

摘要： The effect of thermal pretreatment on the active sites and catalytic performances of PtSn/SiO catalyst in acetic acid (AcOH) hydrogenation was investigated in this article. The catalysts were characterized by N physical adsorption, X-ray diffraction, transmission electron microscopy, pyridine Fourier-transform infrared spectra, and H -O titration on its physicochemical properties. The results showed that Pt species were formed primarily in crystalline structure and no PtSn alloy was observed. Meanwhile, with the increment of thermal pretreatment temperature, Pt dispersion showed a decreasing trend due to the aggregation of Pt particles. Simultaneously, the amount of Lewis acid sites was remarkably influenced by such thermal pretreatment owning to the consequent physicochemical property variation of Sn species. Interestingly, the catalytic activity showed the similar variation trend with that of Lewis acid sites, confirming the important roles of Lewis acid sites in AcOH hydrogenation. Moreover, a balancing effect between exposed Pt and Lewis acid sites was obtained, resulting in the superior catalytic performance in AcOH hydrogenation.

关键词： thermal pretreatment     acetic acid     hydrogenation     ethanol     PtSn/SiO2    

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Modified pretreatment method for total microbial DNA extraction from contaminated river sediment

Yun FANG,Meiying XU,Xingjuan CHEN,Guoping SUN,Jun GUO,Weimin WU,Xueduan LIU

《环境科学与工程前沿（英文）》 2015年 第9卷 第3期   页码 444-452 doi: 10.1007/s11783-014-0679-4

摘要： Extraction of high-quality microbial DNA from contaminated environmental samples is an essential step in microbial ecological study. Based on previously published methods for soil and sediment samples, a modified pretreatment method was developed for extracting microbial DNA from heavily contaminated river sediment samples via selection of optimal pretreatment parameters (i.e., reagent solution, reaction duration, and temperature). The pretreatment procedure involves washing the river sediment sample for three times with a solution containing 0.1 mol·L ethylene diamine tetraacetic acid (EDTA), 0.1 mol·L Tris (pH 8.0), 1.5 mol·L NaCl, 0.1 mol·L NaH PO , and Na HPO at 65°C with 180 r·min for 15 min to remove humic materials and heavy metals prior to the employment of standard DNA extraction procedures. We compared the results of standard procedure DNA extraction following pretreatment, without pretreatment, and with using a commercial PowerSoil DNA Isolation Kit. The results indicated that the pretreatment significantly improved the DNA quality based on DNA yield, DNA fragment length, and determination of prokaryotic diversity. Prokaryotic diversity exhibited in the DNA with the pretreatment was also considerably higher than that extracted with the PowerSoil DNA Isolation Kit only. The pretreatment method worked well even with a small amount of sediment sample (0.25 g or even lower). The method provides a novel, simple, cost-effective tool for DNA extraction for microbial community analysis in environmental monitoring and remediation processes.

关键词： river sediment     DNA extraction     contaminant     pretreatment     microbial community    

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Development of pretreatment protocol for DNA extraction from biofilm attached to biologic activated carbon

Shuting ZHANG, Bo WEI, Xin YU, Bing LIU, Zhuoying WU, Li GU

《环境科学与工程前沿（英文）》 2010年 第4卷 第4期   页码 459-465 doi: 10.1007/s11783-010-0249-3

摘要： The biologic activated carbon (BAC) process is widely used in drinking water treatments. A comprehensive molecular analysis of the microbial community structure provides very helpful data to improve the reactor performance. However, the bottleneck of deoxyribonucleic acid (DNA) extraction from BAC attached biofilm has to be solved since the conventional procedure was unsuccessful due to firm biomass attachment and adsorption capacity of the BAC granules. In this study, five pretreatments were compared, and adding skim milk followed by ultrasonic vibration was proven to be the optimal choice. This protocol was further tested using the vertical BAC samples from the full-scale biofilter of Pinghu Water Plant. The results showed the DNA yielded a range of 40 μg·g BAC (dry weight) to over 100 μg·g BAC (dry weight), which were consistent with the biomass distribution. All results suggested that the final protocol could produce qualified genomic DNA as a template from the BAC filter for downstream molecular biology researches.

关键词： bacterial DNA extraction     biological activated carbon (BAC)     biofilm     water treatment     pretreatment protocol    

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Ozonation as an efficient pretreatment method to alleviate reverse osmosis membrane fouling caused by

Xuehao Zhao, Yinhu Wu, Xue Zhang, Xin Tong, Tong Yu, Yunhong Wang, Nozomu Ikuno, Kazuki Ishii, Hongying Hu

《环境科学与工程前沿（英文）》 2019年 第13卷 第4期 doi: 10.1007/s11783-019-1139-y

摘要：

Humic acids (HA) didn’t cause obvious reverse osmosis (RO) membrane fouling in 45 h.

Osmotic pressure (NaCl) affected slightly the RO membrane fouling behavior of HA.

Ca2+ promoted aggregation of HA molecules and thus aggravated RO membrane fouling.

Ozonation eliminated the effect of Ca2+ on the RO membrane fouling behavior of HA.

The change of the structure of HA was related to its membrane fouling behavior.

关键词： Reverse osmosis     Membrane fouling     Humic acid     Ca2+     Ozone    

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A fast antibiotic detection method for simplified pretreatment through spectra-based machine learning

《环境科学与工程前沿（英文）》 2022年 第16卷 第3期 doi: 10.1007/s11783-021-1472-9

摘要：

• A spectral machine learning approach is proposed for predicting mixed antibiotic.

关键词： Antibiotic contamination     Spectral detection     Machine learning    

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Optimization of the O/HO process with response surface methodology for pretreatment of mother liquor

《环境科学与工程前沿（英文）》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1371-5

摘要：

• Real ML-GFW with high salinity and high organics was degraded by O3/H2O2 process.

关键词： High salinity     High organic matters     Gas field wastewater     O3/H2O2     Response surface methodology    

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Facile strategy for carbon foam fabrication with lignin as sole feedstock and its applications

《化学科学与工程前沿（英文）》 2023年 第17卷 第8期   页码 1051-1064 doi: 10.1007/s11705-022-2248-x

摘要： This research is a follow-up to our recent discovery of a facile strategy for directly converting lignin powder into carbon foam. In this work, we report that the thermal pretreatment parameters in air can remarkably influence the formation and properties of the derived carbon foam. Thermal pretreatment parameters (heating rate, temperature, and residence time) were systematically investigated and a conversion mechanism into carbon foam was proposed. During the thermal pretreatment, relatively low temperatures, low heating rates, and short residence time hindered the formation of smooth and well-connected structures in the carbon foam. The overall product yields were similar regardless of the thermal pretreatment conditions. The densities of the different carbon foams ranged 0.27–0.83 g∙cm−3. The carbon foams with the highest compressive strengths (> 10 MPa) were KLPC280-2-5, KLPC300-0-5, and KLPC300-2-2.5. KLPC280-2-5 exhibited a high iodine sorption value (182 mg∙g−1). KLPC300-2-5 exhibited a specific capacitance of 158 F∙g−1 at a current density of 0.05 A∙g−1. The maximum evaporation rates in the solar vapor generation experiments were 1.05 and 1.38 kg∙m−2∙h−1 under 100 and 150 mW∙cm−2 irradiation, respectively. The good performances are attributed to the robust, porous, and continuous structure.

关键词： lignin     carbon foam     thermal pretreatment     solar vapor generation    

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Precise regulation of acid pretreatment for red mud SCR catalyst: Targeting on optimizing the acidity

《环境科学与工程前沿（英文）》 2022年 第16卷 第7期 doi: 10.1007/s11783-021-1447-x

摘要：

• The optimum SCR activity was realized by tuning the acid pretreatment.

关键词： Air pollution control     Nitrogen oxides     Selective catalytic reduction     Red mud     Solid waste utilization    

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Use of gamma-irradiation pretreatment for enhancement of anaerobic digestibility of sewage sludge

YUAN Shoujun, ZHENG Zheng, YU Xin, ZHAO Yongfu, MU Yanyan

《环境科学与工程前沿（英文）》 2008年 第2卷 第2期   页码 247-250 doi: 10.1007/s11783-008-0041-9

摘要： The effects of ?-irradiation pretreatment on anaerobic digestibility of sewage sludge was investigated in this paper. Parameters like solid components, soluble components, and biogas production of anaerobic digestion experiment for sewage sludge were measured. The values of these parameters were compared before and after ?-irradiation pretreatment. Total solid (TS), volatile solid (VS), suspended solid (SS), volatile suspended solid (VSS), and average floc size of samples decreased after ?-irradiation treatment. Besides, floc size distribution of sewage sludge shifted from 80–100 ?m to 0–40 ?m after ?-irradiation treatment at the doses from 0 to 30 kGy, which indicated the disintegration of sewage sludge. Moreover, microbe cells of sewage sludge were ruptured by ?-irradiation treatment, which resulted in the release of cytoplasm and increase of soluble chemical oxygen demand (SCOD). Both sludge disintegration and microbe cells rupture enhanced the subsequent anaerobic digestion process, which was demonstrated by the increase of accumulated biogas production. Compared with digesters fed with none irradiated sludge, the accumulated biogas production increased 44, 98, and 178 mL for digesters fed sludge irradiated at 2.48, 6.51, and 11.24 kGy, respectively. The results indicated that ?-irradiation pretreatment could effectively enhance anaerobic digestibility of sewage sludge, and correspondingly, could accelerate hydrolysis process, shorten sludge retention time of sludge anaerobic digestion process.

关键词： anaerobic digestibility     soluble chemical     cytoplasm     digestion process     soluble    

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Stabilization of hexavalent chromium with pretreatment and high temperature sintering in highly contaminated

Haiyan Mou, Wenchao Liu, Lili Zhao, Wenqing Chen, Tianqi Ao

《环境科学与工程前沿（英文）》 2021年 第15卷 第4期 doi: 10.1007/s11783-020-1353-7

摘要： Abstract • Separate reduction and sintering cannot be effective for Cr stabilization. • Combined treatment of reduction and sintering is effective for Cr stabilization. • Almost all the Cr in the reduced soil is residual form after sintering at 1000°C. This study explored the effectiveness and mechanisms of high temperature sintering following pre-reduction with ferric sulfate (FeSO4), sodium sulfide (Na2S), or citric acid (C6H8O7) in stabilizing hexavalent chromium (Cr(VI)) in highly contaminated soil. The soil samples had an initial total Cr leaching of 1768.83 mg/L, and Cr(VI) leaching of 1745.13 mg/L. When FeSO4 or C6H8O7 reduction was followed by sintering at 1000°C, the Cr leaching was reduced enough to meet the Safety Landfill Standards regarding general industrial solid waste. This combined treatment greatly improved the stabilization efficiency of chromium because the reduction of Cr(VI) into Cr(III) decreased the mobility of chromium and made it more easily encapsulated in minerals during sintering. SEM, XRD, TG-DSC, and speciation analysis indicated that when the sintering temperature reached 1000°C, almost all the chromium in soils that had the pre-reduction treatment was transformed into the residual form. At 1000°C, the soil melted and promoted the mineralization of Cr and the formation of new Cr-containing compounds, which significantly decreased subsequent leaching of chromium from the soil. However, without reduction treatment, chromium continued to leach from the soil even after being sintered at 1000°C, possibly because the soil did not fully fuse and because Cr(VI) does not bind with soil as easily as Cr(III).

关键词： Chromium     Heavy contaminated soil     Reduction     Sintering     Stabilization     Speciation    

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标题 作者 时间 类型 操作

Enhanced dewatering characteristics of waste activated sludge with Fenton pretreatment: effectiveness

Guangyin ZHEN, Xueqin LU, Baoying WANG, Youcai ZHAO, Xiaoli CHAI, Dongjie NIU, Tiantao ZHAO

期刊论文

Biological pretreatment of corn stover by solid state fermentation of

Jian ZHANG, Xin REN, Wenqun CHEN, Jie BAO

期刊论文

木质纤维原料制乙醇原料预处理技术

靳胜英,张福琴,张礼安

期刊论文

Thermochemical pretreatment of meat and bone meal and its effect on methane production

Guangxue WU , Zhenhu HU , Mark G. HEALY , Xinmin ZHAN ,

期刊论文

Optimization of microwave pretreatment of lignocellulosic waste for enhancing methane production: Hyacinth

Bai-Hang Zhao, Jie Chen, Han-Qing Yu, Zhen-Hu Hu, Zheng-Bo Yue, Jun Li

期刊论文

Effect of thermal pretreatment on the surface structure of PtSn/SiO

Guozhen Xu, Jian Zhang, Shengping Wang, Yujun Zhao, Xinbin Ma

期刊论文

Modified pretreatment method for total microbial DNA extraction from contaminated river sediment

Yun FANG,Meiying XU,Xingjuan CHEN,Guoping SUN,Jun GUO,Weimin WU,Xueduan LIU

期刊论文

Development of pretreatment protocol for DNA extraction from biofilm attached to biologic activated carbon

Shuting ZHANG, Bo WEI, Xin YU, Bing LIU, Zhuoying WU, Li GU

期刊论文

Ozonation as an efficient pretreatment method to alleviate reverse osmosis membrane fouling caused by

Xuehao Zhao, Yinhu Wu, Xue Zhang, Xin Tong, Tong Yu, Yunhong Wang, Nozomu Ikuno, Kazuki Ishii, Hongying Hu

期刊论文

A fast antibiotic detection method for simplified pretreatment through spectra-based machine learning

期刊论文

Optimization of the O/HO process with response surface methodology for pretreatment of mother liquor

期刊论文

Facile strategy for carbon foam fabrication with lignin as sole feedstock and its applications

期刊论文

Precise regulation of acid pretreatment for red mud SCR catalyst: Targeting on optimizing the acidity

期刊论文

Use of gamma-irradiation pretreatment for enhancement of anaerobic digestibility of sewage sludge

YUAN Shoujun, ZHENG Zheng, YU Xin, ZHAO Yongfu, MU Yanyan

期刊论文

Stabilization of hexavalent chromium with pretreatment and high temperature sintering in highly contaminated

Haiyan Mou, Wenchao Liu, Lili Zhao, Wenqing Chen, Tianqi Ao

期刊论文