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Application of ultra-sonication, acid precipitation and membrane filtration for co-recovery of protein and humic acid from sewage sludge

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Frontiers of Environmental Science & Engineering 2016年第2期10卷 327-335页

作者： Liangliang WEI Kun WANG Xiangjuan KONG Guangyi LIU Shuang cui Qingliang ZHAO fuyi cui Key Laboratory of Songliao Aquatic Environment (Ministry of Education) Jilin Jianzhu University Changchun 130118 China School of Mu-nicipal & Environmental Engineering Harbin Institute of Technology Harbin 150090 China Center of Science & Technology of Construction of the Ministry of Housing and Urban Rural Development of E R. China Beijing 100835 China Procter & Gamble Company Guangzhou 510620 China

A novel method was applied to co-recover proteins and humic acid from the dewatered sewage sludge for liquid fertilizer and animal feed. The proteins in sewage sludge were first extracted using the processes of ultra- sonication and acid precipitation, and then the humic acid was recovered via membrane filtration. The extraction efficiency was 125.9mg humic acid-gWSS volatile suspended solids （VSS） and 123.9 mg proteins-g-1 VSS at the optimal ultrasonic density of 1.5 W·mL-1. FT-IR spectrum results indicated that the recovered proteins and humic acid showed similar chemical characteristic to the natural proteins and humic acid. The acidic solution （pH 2） could be recycled and used more than 10 times during the co-recovery processes. In addition, the dewatered sludge could be easily biodegraded when the humic acid and proteins are extracted, which was essential for further utilization. These findings are of great significance for recovering valuable nutrient fi＇om sewage sludge.

关键词： sewage sludge co-recovery proteins humicacid recycling biodegradation rate

Characterization of the adsorption behavior of aqueous cadmium on nanozero-valent iron based on orthogonal experiment and surface complexation modeling

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Chinese Journal of Chemical Engineering 2016年第9期24卷 1270-1274页

作者： Dongmei Liu Huan Tang Ying Zhao fuyi cui Jing Lu State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology School of Municipal and Environmental Engineering Harbin Institute of Technology

Polyvinylpyrrolidone K-30(PVP) was introduced into the preparation of nanozero-valent iron(n ZVI) and the traditional liquid-phase reduction was improved. The introduction of PVP simplified the traditional *** n ZVI prepared with this new approach showed excellent surface characters and high performance on the removal of cadmium. TEM results showed that the aggregates of n ZVI can reach to several micrometers in length but less than 100 nm in diameter. The iron particles that were enclosed by a layer of oxide film that is less than10 nm, demonstrated that the n ZVI possesses a core–shell structure. BET results indicate that the specific surface area of the n ZVI was 20.3159 m^2g^(-1). A three factor and three level orthogonal experiment was employed to find out the dominant factor that affects the removal rate of cadmium by n ZVI. Based on the range values, the prominence order of each factor was: initial p H of the solution N initial concentration of cadmium N dosage of n ZVI, the range was 96.453, 3.294 and 1.747, respectively. A simulation was performed under the same condition and a same conclusion was derived, this consistence confirmed the validity of the conclusion that p H is the most significant factor that affects the adsorption efficiency.

关键词： Cadmium Nanozero-valent iron Synthesis Polyvinylpyrrolidone Orthogonal experiment Diffuse layer model

Evaluation of drinking water treatment combined filter backwash water recycling technology based on comet and micronucleus assay

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Journal of Environmental Sciences 2016年第4期28卷 61-70页

作者： Ting Chen Yongpeng Xu Zhiquan Liu Shijun Zhu Wenxin Shi fuyi cui State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology School of Municipal and Environmental Engineering Harbin Institute of Technology

Based on the fact that recycling of combined filter backwash water（CFBW）directly to drinking water treatment plants（WTP）is considered to be a feasible method to enhance pollutant removal efficiency,we were motivated to evaluate the genotoxicity of water samples from two pilot-scale drinking water treatment systems,one with recycling of combined backwash water,the other one with a conventional *** integrated approach of the comet and micronucleus（MN）assays was used with zebrafish（Danio rerio）to investigate the water genotoxicity in this *** total organic carbon（TOC）,dissolved organic carbon（DOC）,and trihalomethane formation potential（THMFP）,of the recycling process were lower than that of the conventional *** the results showed that there was no statistically significant difference（P〉0.05）between the conventional and recycling processes,and indicated that the genotoxicity of water samples from the recycling process did not accumulate in 15 day continuous recycling *** was worth noting that there was correlation between the concentrations of TOC,DOC,UV（254）,and THMFPs in water and the DNA damage score,with corresponding R^2 values of 0.68,0.63,0.28,and ***,both DNA strand breaks and MN frequency of all water samples after disinfection were higher than that of water samples from the two treatment units,which meant that the disinfection by-products（DBPs）formed by disinfection could increase the DNA *** the comet and MN tests suggest that the recycling process did not increase the genotoxicity risk,compared to the traditional process.

关键词： Combined filter backwash water Drinking water treatment Genotoxicity Comet assay Micronucleus

Effect of filter-feeding fish silver carp on phytoplankton species and size distribution in surface water:A field study in water works

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Journal of Environmental Sciences 2010年第2期22卷 161-167页

作者： Hua Ma fuyi cui Zhiquan Liu Zhenqiang Fan Wenjie He Peijun Yin State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin 150090 China Tianjin Waterworks Group Co. Ltd. Tianjin 300040 China

Silver carp were introduced into the pre-sedimentation pond to control excessive phytoplankton in raw water. The effectiveness of the filter-feeding silver carp on phytoplankton control and the effect of silver carp on phytoplankton community were investigated. The results showed that Microcystis could be effectively removed by silver carp stocked in the pre-sedimentation pond, and simultaneously, the concentration of single-cell phytoplankton increased obviously. The difference in phytoplankton species and single- cell phytoplankton size between in the water and in the gut of silver carp indicated that phytoplankton smaller than 5 μm, such as Chamydomonas and Platymonas, were almost not be filtered by silver carp, phytoplankton with the size between 5 and 20μm could be partly filtered, and large size phytoplankton, mainly colony-forming Microcystis could be filtered almost completely. These filter- feeding characteristics directly caused the phytoplankton size distribution biased toward miniaturization. Therefore, this biological treatment using silver carp could be applied only to deal with groups of Microcystis-dominated eutrophic water, and was not appropriate in water bodies where single-cell micro phytoplankton were dominant. Especially when silver carp are used in water treatment, a cautious attitude should be taken based on the evaluation of phytoplankton biomass and species structure features in raw water.

关键词： phytoplankton control silver carp Microcystis single-cell micro phytoplankton

Effect of Dissolved Organic Matter on Titanium Dioxide Nanoparticles in Aquatic Environment:Molecular Weight Fractions

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Journal of Harbin Institute of Technology(New Series) 2020年第5期27卷 38-48页

作者： Xiaonan Yang Dongmei Liu fuyi cui School of Environment Harbin Institute of TechnologyHarbin 150090China College of Urban Construction and Environmental Engineering Chongqing UniversityChongqing 400044China

At present,a growing number of consumer products contain engineered nanoparticle TiO2(nano⁃TiO2),which has resulted in the consequences of nano⁃TiO2 entering the aquatic environment directly or indirectly at some *** fate of nano⁃TiO2 in the aquatic environment has become the key factor which affects its safety application and *** paper aims to investigate how the dissolved organic matters(DOM),especially the molecular weight fractions in the aquatic environment,affect the aggregation,stability,and fate of nano⁃TiO2,and the interaction mechanism of DOM and nano⁃*** of dynamic light scattering(DLS)showed that the molecular weight of DOM molecules caused different aggregation rates of nano⁃TiO2 in aqueous *** Transform infrared spectroscopy(FTIR)results indicated the molecular structure is characteristics of DOM fractions and the mechanisms of bonds formation between DOM and nano⁃*** of three⁃dimensional excitation⁃emission matrices(3D⁃EEM)confirmed the FTIR results and implied the increase of the stability of theπ-πconjugated system in the presence of *** addition,low molecular weight of DOM fractions appeared to show more affinity with nano⁃TiO2 than high molecular weight fractions.

关键词： titanium dioxide nanoparticles dissolved organic matter different molecular weight organics

Experimental studies on oxidizing removal of Cyclops of zooplankton

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High Technology Letters 2006年第1期12卷 86-90页

作者：刘冬梅 cui fuyi Lin Tao An Dong Zhang Min School of Municipal ＆ Environmental Engineering Harbin Institute of Technology Harbin 150090 P.R. China

The inactivation of Cyclops with currently available oxidants such as chlorine, chlorine dioxide, ozone and potassium permanganate was investigated and reported under various working conditions of different oxidant dosage, organic substance content and pH value. The removal efficiency of Cyclops by predosing chlorine dioxide in water treatment process was comprehensively compared with that of the conventional prechlorination process. The results showed that chlorine dioxide might be most effective to inactivate Cyclops than other oxidants and its effect was less influenced by external conditions. Cyclops could be effectively inactivated by chlorine dioxide preoxidation and be thoroughly removed from water by chlorine dioxide preoxidation cooperating with routine clarification process, i.e. flocculation, sedimentation and filtration.

关键词： Cyclops of zooplankton water treatment oxidant removal

Impact of Untreated Sedimentation Tank Sludge Water Recycle on Water Quality During Treatment of Low Turbidity Water

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Journal of Harbin Institute of Technology(New Series) 2015年第4期22卷 79-86页

作者： Ronggang Xu Yongpeng Xu fuyi cui Li He Dong Wang Qingfeng Su School of Municipal & Environmental Engineering Harbin Institute of Technology Ji'nan Municipal Engineering Design & Research Institute(Group) Co. Ltd National Engineer Research Center of Urban Water Resources Southwest Municipal Engineering Design & Research Institute of China China Urban Construction Design & Research Institute Co. Ltd

The overall purpose of this research is to examine the impact of untreated sedimentation tank sludge water( USTSW) recycle on water quality during treatment of low turbidity water in coagulation—sedimentation processes. 950 m L of raw water and different concentrations of 50 m L USTSW are injected into six 1 000 m L beakers without *** results indicate that USTSW characterized as accumulated suspended solids and organic matter has active ingredients,which possess the equivalent function of coagulant. The optimal blended water turbidity is in the range of 10-20 NTU,within which USTSW recycle achieves the highest save coagulant rate. The mechanism of strengthening coagulation effect when USTSW recycle mainly depends on the chemical effect and physical effect. What is more,through scanning electron microscopy( SEM),it is found that the floc structures with USTSW recycle are more compact than those without USTSW recycle. Besides,the water quality parameters of color,NH3-N,CODMn,UV254,total aluminum,total manganese when USTSW recycle is better than the raw water without recycle,indicating that USTSW recycle can improve water quality with strengthening coagulation effect.

关键词： untreated sedimentation tank sludge water recycle low turbidity optimal blended water turbidity water quality

A Synergistic Strategy for Nanoparticle/Nanofiber Composites Towards p-Nitrophenol Catalytic Hydrogenation

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Chemical Research in Chinese Universities 2015年第6期31卷 1012-1017页

作者： WANG Wei WANG Ke HE Jiaojie ZHANG Xintong WANG Ce ZHAO Zhiwei cui fuyi State Key Laboratory of Urban Water Resource and Environment(SKLUWRE) School of Municipal and Environmental Engineering Harbin Institute of Technology Harbin 150090 P. R. China Alan G. Macdiarmid Institute Jilin University Changchun 130012 P. R. China Department of National Defense Construction Planning and Environmental Engineering Logistical Engineering University Chongqing 401311 P R. China

Nanoparticle（NP）/nanofiber（NF） composites based on Ag/hydrostable-polyvinyl alcohol were fabricated by a green synergistic strategy via electrospinning. The electrospun NFs served as an in situ reducing agent for the metal salt precursors and a protecting agent for the resulting NPs. Additionallly, during the fomation of the NPs, the water-soluble NFs were in situ oxidized and catalyzed by the metal ions to achieve chemical crosslinking. This two-in-one process achieves polymer curing and metal nanoparticles reducing/protecting synergistically. It eliminates the usage of organic electrospinning solvents, conventional chemical reducing agents and stabilizers, as well as harmful chemical crosslinking agents during the whole process. By the absolutely green synergistic electrospinning, nanoparticle/nanofiber composites with super-hydrophilicity, good hydrostability, as well as uniform and thin particle sizes were obtained. They exhibited enhanced activities when used for catalytic hydrogenation ofp-nitrophenol in water.

关键词： Electrospirming Supported narloparticle Nanofiber Ag

Three-dimensional porous photo-thermal fiber felt with salt-resistant property for high efficient solar distillation

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Chinese Chemical Letters 2021年第4期32卷 1442-1446页

作者： Jingjing Zhang Xueqing Luo Xiaoxin Zhang Ying Xu Hongbo Xu Jinlong Zuo Dongmei Liu fuyi cui Wei Wang State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China School of Chemistry and Chemical Engineering Harbin Institute of TechnologyHarbin 150090China Department of Environmental Engineering Harbin University of CommerceHarbin 150076China School of Ecology and Environment Zhengzhou UniversityZhengzhou 450000China

The urgent need for fresh water resource is a public issue facing the *** distillation for seawater desalination is a promising freshwater production *** solar evaporation systems based on 2 D photo-thermal membranes have been widely studied,but salt pollution is one of the main challenges for solar *** order to solve this problem,a hydrophilic three-dimensional(3 D)porous photo-thermal fiber felt(PFF)was obtained by one-step method,through a simple polydopamine(PDA)coating method with hydrophobic graphite felt as a *** PFF had a good evaporation rate of 1.48 kg m^(-2)h^(-1)and its corresponding light-vapor conversion efficiency reached 87.4%.In addition,the PFF exhibited an excellent salt-resistant ability when applied to photo-thermal evaporation of highsalinity seawater with 10 wt%NaCl,owing to its intrinsic 3 D macroporous structure for the migration circulation of salt *** development of the PFF offers a new route for the exploration of salt-re sistant photo-thermal materials and is promising for the practical application of solar distillation.

关键词： Solar distillation Photo-thermal evaporation Solar desalination Salt resistance Solar evaporation