Search results for: Haiping Yuan

Items from 1 to 20 out of 42 results

article

Nitrogen loss reduction by adding KH2PO4-K2HPO4 buffer solution during composting of sewage sludge

Jiayun Liang, Yanwen Shen, Zongqi Shou, Haiping Yuan, more

Bioresource Technology > 2018 > 264 > C > 116-122

Nitrogen loss through gaseous emission, mainly ammonia emission, was an inevitable problem during sewage sludge composting. In this study, MgSO₄ + K₃PO₄ (Run A), K₂SO₄ + KH₂PO₄-K₂HPO₄ (Run B) and MgSO₄ + KH₂PO₄-K₂HPO₄ (Run C) were mixed with mixtures before composting, aiming at researching the effects of buffer solution on reducing nitrogen loss during composting. Ammonia loss of Run C was reduced...

article

Fluorine recovery from etching wastewater through CaF2-based near-infrared photocatalyst synthesis

Changkai Yin, Sen Yu, Bairui An, Ziyang Lou, more

Journal of Cleaner Production > 2018 > 175 > C > 267-275

Fluorine in etching wastewater is an important F resource, and the development of a high value-added fluorine based compounds could benefit for the fluoride resource saving and the reduction of fluoride effluent. In this work, F from etching wastewater was recovered by composites of CaF₂ and CaSO₄, which was used to prepare as the near infrared photocatalyst of Tm³⁺/Yb³⁺ co-doped ((CaF₂/CaWO₄)@Bi₂...

article

Effectiveness of wind turbine blades waste combined with the sewage sludge for enriched carbon preparation through the co-pyrolysis processes

Jing Hu, Mohammed Danish, Ziyang Lou, Pin Zhou, more

Journal of Cleaner Production > 2018 > 174 > C > 780-787

Co-pyrolysis can enhance the sewage sludge sequestrated carbon quantity through the introduction of other carbon containing precursors. In this work, wind turbine blade waste (WTBW) was used to perform a co-pyrolysis system of sludge at 600 °C, in presence of activating agent KOH. The optimum mass proportion of WTBW was 40% for carbon material preparation in terms of surface area, and the apparent...

article

The degradation processes of refractory substances in nanofiltration concentrated leachate using micro-ozonation

Hui Wang, Yunhai Wang, Ziyang Lou, Nanwen Zhu, more

Waste Management > 2017 > 69 > C > 274-280

Concentrated leachate (CL) is the byproduct of leachate treated by the membrane separation unit after bio-treatment processes, and contains many humic-like substances. Ozonation processes were applied and optimized for the further removal of those refractory matters in this work. Micro-bubble ozonation (MB-O₃) possessed the best performance, and 76.0% and 69.9% of COD and TOC were found to be removed...

article

Mitigating inhibition of undissociated volatile fatty acids (VFAs) for enhanced sludge-rice bran composting with ferric nitrate amendment

Zongqi Shou, Haiping Yuan, Yanwen Shen, Jiayun Liang, more

Bioresource Technology > 2017 > 244 > P1 > 672-678

This study investigated the effect of ferric nitrate on mitigating the inhibition of volatile fatty acids (VFAs) during the initial phase of sewage sludge composting amended with rice bran. During the 34-day lab-scale composting, the supplementation of ferric nitrate enhanced the degradation of VFAs by up to 3 times as compared to the control. The organic matters loss (OML) rate in the treatment reactor...

article

Kinetics and microbial community analysis of sludge anaerobic digestion based on Micro-direct current treatment under different initial pH values

Haiping Yuan, Ying Chen, Xiaohu Dai, Nanwen Zhu

Energy > 2016 > 116 > P1 > 677-686

The effects of Micro-direct current treatment (Micro-DC) on the performance of sludge anaerobic digestion under different initial pH values were investigated in this study. Biogas production and VS removal rate tests were conducted to determine the optimum initial pH value based on the Micro-DC treatment, and the evolution of archaeal community was also investigated through high-throughput sequencing...

article

Comparison of effects of ferric nitrate additions in thermophilic, mesophilic and psychrophilic aerobic digestion for sewage sludge

Ningben Jin, Wenhao Li, Zongqi Shou, Haiping Yuan, more

Journal of the Taiwan Institute of Chemical Engineers > 2016 > 67 > C > 346-354

The effects of ferric nitrate additions in thermophilic, mesophilic and psychrophilic conditions were investigated in aerobic digestion for sewage sludge. The results showed that the addition of chemical could significantly enhance the volatile solid (VS) removal by shortening 7 days of stabilization time, and increasing 5.52% and 2.12% after 21 days of digestion at 55 °C, 35 °C and 15 °C comparing...

article

Downdrag Force Analysis for Seismic Soil–Pile–Structure Interaction

Haiping Yuan, Ying Li

Geotechnical and Geological Engineering > 2017 > 35 > 1 > 493-501

Earthquake can cause settlement of soil being greater than that of the pile. The pile is pulled down by the soil, and negative friction force is produced on the pile side. The carrying capacity of pile will be reduced because of the negative friction force, which may cause engineering instability. In this paper, the nonlinear and finite difference program FLAC3D was used to evaluate the mechanical...

article

Pilot-scale study of enhanced anaerobic digestion of waste activated sludge by electrochemical and sodium hypochlorite combination pretreatment

Haiping Yuan, Bao Yu, Peiwen Cheng, Nanwen Zhu, more

International Biodeterioration & Biodegradation > 2016 > 110 > C > 227-234

A pilot-scale study was carried out to evaluate the sludge anaerobic digestion in Qingpu wastewater treatment plant in Shanghai, China. This performance of sludge anaerobic digestion with electrochemical and sodium hypochlorite combination pretreatment was assessed by VS removal and biogas production. The results showed that the system with the pretreatment of electrochemical and sodium hypochlorite...

article

Progress in inhibition mechanisms and process control of intermediates and by-products in sewage sludge anaerobic digestion

Haiping Yuan, Nanwen Zhu

Renewable and Sustainable Energy Reviews > 2016 > 58 > C > 429-438

Anaerobic digestion is an effective waste treatment method both for the pollution control and energy recovery, such as treating many agricultural and industrial wastes which contain high level of easily biodegradable substances. However, there are also many problems to be resolved, such as low methane yield, long retention time and process instability, preventing this technique from being widely applied...

article

Selective simplification and reinforcement of microbial community in autothermal thermophilic aerobic digestion to enhancing stabilization process of sewage sludge by conditioning with ferric nitrate

Ningben Jin, Zongqi Shou, Haiping Yuan, Ziyang Lou, more

Bioresource Technology > 2016 > 204 > C > 106-113

The effect of ferric nitrate on microbial community and enhancement of stabilization process for sewage sludge was investigated in autothermal thermophilic aerobic digestion. The disinhibition of volatile fatty acids (VFA) was obtained with alteration of individual VFA concentration order. Bacterial taxonomic identification by 454 high-throughput pyrosequencing found the dominant phylum Proteobacteria...

article

Metal recovery based magnetite near-infrared photocatalyst with broadband spectrum utilization property

Shouqiang Huang, Haoming Wang, Nanwen Zhu, Ziyang Lou, more

Applied Catalysis B: Environmental > 2016 > 181 > C > 456-464

Magnetite near-infrared (NIR) photocatalysts with upconversion properties are put forward to meet the requirements of high solar energy utilization efficiency and sustainability based on the resource utilization of electroplating wastewater (EPW). The Ca–Zn magnetite precursor (CZ) was initially prepared from the mixed-ferrites (M-Fe₃O₄) produced from EPW and the photocatalyst (Zn²⁺) and upconversion...

article

Bachmann–Kühn’s brackets and multiple zeta values at level N

Haiping Yuan, Jianqiang Zhao

manuscripta mathematica > 2016 > 150 > 1-2 > 177-210

Multiple zeta values (MZVs) are generalizations of Riemann zeta values at positive integers to multiple variable setting. These values can be further generalized to level N multiple polylog values by evaluating multiple polylogs at Nth roots of unity. In this paper, we consider another level N generalization by restricting the indices in the iterated sums defining MZVs to congruence classes modulo...

article

Facile synthesis of porous TiO2 photocatalysts using waste sludge as the template

Xiaopeng Wang, Shouqiang Huang, Nanwen Zhu, Ziyang Lou, more

Applied Surface Science > 2015 > 359 > C > 917-922

A resource utilization method of waste sludge is present by the synthesis of waste sludge templated TiO₂ photocatalysts. The organic materials in waste sludge are used as the pore-forming agents, and the transition metals included in the remaining waste sludge through calcination (WSC) can serve as the dopants for the WSC-TiO₂ (WSCT) photocatalyst. The visible and UV–visible light driven photocatalytic...

article

Dosing time of ferric chloride to disinhibit the excessive volatile fatty acids in sludge thermophilic anaerobic digestion system

Bao Yu, Aidang Shan, Dongling Zhang, Ziyang Lou, more

Bioresource Technology > 2015 > 189 > C > 154-161

An investigation into the effect of ferric chloride (FeCl₃) on the disinhibition of excessive volatile fatty acids (VFAs) in sludge thermophilic anaerobic digestion (AD) system was performed. The optimum dosing time of FeCl₃ was tested with the time interval of 0h, 36h, 72h, 108h and 144h. The maximum biogas production was obtained in the case of 72nd hour dosing group, and the biogas production potential...

article

Enhancing upconversion emissions of Er3+/Tm3+/Yb3+ tridoped (NaY(WO4)2/YF3) through TiO2 coating and Bi3+ doping and its photocatalytic applications

Shouqiang Huang, Ziyang Lou, Zhibin Qi, Nanwen Zhu, more

Applied Catalysis B: Environmental > 2015 > 168-169 > C > 313-321

Enhanced upconversion property is important for the improvement of photocatalytic activity in the TiO₂ based near-infrared (NIR) photocatalysts. Herein, an excellent NIR photocatalyst of Er³⁺/Tm³⁺/Yb³⁺/Bi³⁺ doped (NaY(WO₄)₂/TiO₂/YF₃) (ETYB-NTY) was synthesized with a multi-stage upconversion nanocrystal formation process. It is found that TiO₂ coatings not only provide photocatalytic activity, but...

article

Enhancement of autothermal thermophilic aerobic digestion by chemical approach: Dosage of ferric nitrate on disinhibition of excessive volatile fatty acids

Ningben Jin, Yawen Shao, Haiping Yuan, Ziyang Lou, more

Chemical Engineering Journal > 2015 > 265 > Complete > 9-15

Ferric nitrate was utilized to remove inhibition of excessive volatile fatty acids (VFAs) in autothermal thermophilic aerobic digestion (ATAD) by chemical precipitation in this study. The dosage of Fe(NO ₃ ) ₃ had a significant effect on performance of the ATAD process and a dosage gradient of Fe(NO ₃ ) ₃ equivalent to 500, 1000, 1500, 2000mg/L for the removal of acetic...

article

Variations of organic matters and microbial community in thermophilic anaerobic digestion of waste activated sludge with the addition of ferric salts

Bao Yu, Ziyang Lou, Dongling Zhang, Aidang Shan, more

Bioresource Technology > 2015 > 179 > C > 291-298

Ferric salts will influence the thermophilic anaerobic digestion of waste activated sludge (WAS). FeCl₃ was found to contribute to the anaerobic digestion process with a cumulative biogas production of 357mL/gVS, 79.6% higher than that in the control group, and Fe₂(SO₄)₃ had no distinct impact, while Fe(NO₃)₃ inhibited the methanogenesis process. A favorable balance between the release of organic...

article

Disinhibition of excessive volatile fatty acids to improve the efficiency of autothermal thermophilic aerobic sludge digestion by chemical approach

Ningben Jin, Bo Jin, Nanwen Zhu, Haiping Yuan, more

Bioresource Technology > 2015 > 175 > C > 120-127

In this study, we explored a chemical approach to eliminate inhibition of excessive volatile fatty acids (VFAs) in autothermal thermophilic aerobic digestion (ATAD). Ferric nitrate, ferric chloride, potassium nitrate and potassium chloride were employed to demonstrate the combined action of ferric ion and nitrate ion. Supplementation of ferric nitrate in the sludge digestion system resulted in reducing...

article

Disinhibition of the ammonium nitrogen in autothermal thermophilic aerobic digestion for sewage sludge by chemical precipitation

Haiping Yuan, Changwen Xu, Nanwen Zhu

Bioresource Technology > 2014 > 169 > C > 686-691

Magnesium ammonium phosphate (MAP) precipitation was introduced to remove ammonium nitrogen (NH₄⁺-N) in autothermal thermophilic aerobic digestion (ATAD) in this study by addition of MgCl₂·6H₂O and NaH₂PO₄·2H₂O. The results showed that the lowest NH₄⁺-N concentration was found in the D2 digester after 2nd day dosing treatment and 38.12% of VS removal efficiency was obtained after 15days ATAD treatment...

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Search results for: Haiping Yuan

Nitrogen loss reduction by adding KH2PO4-K2HPO4 buffer solution during composting of sewage sludge

Fluorine recovery from etching wastewater through CaF2-based near-infrared photocatalyst synthesis

Effectiveness of wind turbine blades waste combined with the sewage sludge for enriched carbon preparation through the co-pyrolysis processes

The degradation processes of refractory substances in nanofiltration concentrated leachate using micro-ozonation

Mitigating inhibition of undissociated volatile fatty acids (VFAs) for enhanced sludge-rice bran composting with ferric nitrate amendment

Kinetics and microbial community analysis of sludge anaerobic digestion based on Micro-direct current treatment under different initial pH values

Comparison of effects of ferric nitrate additions in thermophilic, mesophilic and psychrophilic aerobic digestion for sewage sludge

Downdrag Force Analysis for Seismic Soil–Pile–Structure Interaction

Pilot-scale study of enhanced anaerobic digestion of waste activated sludge by electrochemical and sodium hypochlorite combination pretreatment

Progress in inhibition mechanisms and process control of intermediates and by-products in sewage sludge anaerobic digestion

Selective simplification and reinforcement of microbial community in autothermal thermophilic aerobic digestion to enhancing stabilization process of sewage sludge by conditioning with ferric nitrate

Metal recovery based magnetite near-infrared photocatalyst with broadband spectrum utilization property

Bachmann–Kühn’s brackets and multiple zeta values at level N

Facile synthesis of porous TiO2 photocatalysts using waste sludge as the template

Dosing time of ferric chloride to disinhibit the excessive volatile fatty acids in sludge thermophilic anaerobic digestion system

Enhancing upconversion emissions of Er3+/Tm3+/Yb3+ tridoped (NaY(WO4)2/YF3) through TiO2 coating and Bi3+ doping and its photocatalytic applications

Enhancement of autothermal thermophilic aerobic digestion by chemical approach: Dosage of ferric nitrate on disinhibition of excessive volatile fatty acids

Variations of organic matters and microbial community in thermophilic anaerobic digestion of waste activated sludge with the addition of ferric salts

Disinhibition of excessive volatile fatty acids to improve the efficiency of autothermal thermophilic aerobic sludge digestion by chemical approach

Disinhibition of the ammonium nitrogen in autothermal thermophilic aerobic digestion for sewage sludge by chemical precipitation

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