Guanglei Qiu - Academia.edu (original) (raw)
Papers by Guanglei Qiu
2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011
ABSTRACT The tidal-flow constructed wetland is a new type of constructed wetland proposed by the ... more ABSTRACT The tidal-flow constructed wetland is a new type of constructed wetland proposed by the University of Birmingham, U.K. The principal of the wetland takes advantage of the rhythmical movement of wastewater and air which accelerates the alternation of aerobic and anaerobic to realize and enhance pollutant removal. This study focused on two aspects, the different operation performances for treating pollutants at a low temperature in winter between tidal-flow and traditional continuous-flow constructed wetlands, and the influences of treatment efficiency under different operating circumstances. The results showed that, under 0.2m3/m2/dhydraulic load, the removal rates of the three-cycles/d tidal flow constructed wetland for NH4+-N, COD and PO43--P could reach 48.57%, 68.96% and 29.02% respectively, which were about 30%, 20% and 20% higher than these in continuous flow wetlands, correspondingly.
Water science and technology : a journal of the International Association on Water Pollution Research, 2016
The effects of CeO2 nanoparticles (NPs) on the system performance and the bacterial community dyn... more The effects of CeO2 nanoparticles (NPs) on the system performance and the bacterial community dynamics in a sequencing batch reactor (SBR) were investigated, along with the fate and removal of CeO2 NPs within the SBR. Significant impact was observed on nitrification; NH4(+)-N removal efficiency decreased from almost 100% to around 70% after 6 days of continuous exposure to 1.0 mg/L of CeO2 NPs, followed by a gradual recovery until a stable value of around 90% after 20 days. Additionally, CeO2 NPs also led to a significant increase in the protein content in the soluble microbial products, showing the disruptive effects of CeO2 NPs on the extracellular polymeric substance matrix and related activated sludge structure. Denaturing gradient gel electrophoresis analysis showed remarkable changes in the bacterial community structure in the activated sludge after exposure to CeO2 NPs. CeO2 NPs were effectively removed in the SBR mainly via sorption onto the sludge. However, the removal effi...
Journal of Cleaner Production, 2015
ACS Sustainable Chemistry & Engineering, 2015
For the copper-containing berberine wastewater produced by pharmaceutical chemosynthesis of Liaoh... more For the copper-containing berberine wastewater produced by pharmaceutical chemosynthesis of Liaohe River,the Fe-C microelectrolysis reactor-ion exchange column combined process was selected according to the the characteristics of the wastewater.The lab-scale and pilot-scale pretreatments were carried out.The results showed that for the influent wastewater with chemical oxygen demand(COD)concentration of 60 000- 80 000 mg/L,copper concentration of 12 000-18 000 mg/L,berberine concentration of 1 700-1 900 mg/L,the removal efficiencies of berberine and Cu2+ were higher than 99.0 %,and the concentration of berberine and Cu2+ in effluent were lower than 1.0 mg/L and 0.5 mg/L after lab scale experiment.For the pilot scale experiment,the CODCr removal efficiency is higher than 44.0 %,while Cu2+ removal efficiency is higher than 79.0 %.12-13 kg bronze per ton wastewater could be recovered.The Fe-C microelectrolysis reactor-ion exchange column combined process showed good pretreatment effect...
Frontiers of Environmental Science & Engineering in China, 2009
2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011
3per day was carried out for swine wastewater treatment by using of a moving bed biofilm reactor ... more 3per day was carried out for swine wastewater treatment by using of a moving bed biofilm reactor (MBBR). The reactor was start-up in 60 days period and run for a year, and an average removal rate of 82.9% for COD and 89.0% for ammonia were achieved, under a hydraulic retention time (HRT) of 12h, with influent COD and ammonia of 1686 ± 497 mg/L and 582 ± 126 mg/L, respectively. The effluent met the national discharge standard of pollutants for livestock and poultry breeding (GB 18596-2001) of China. The kinetics of organic carbon and ammonia removals in the MBBR was studied based on the Stover-Kincannon model and the 1/2 order substrate removal model, respectively. Temperature coefficient "θ" was introduced into the COD and ammonia removal models to describe the effects of the temperature. The model simulated results showed good agreements with experimental results. The model could be employed for the design of a full-scale MBBR process for simultaneous removal of organic carbon and ammonia from swine wastewaters.
2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011
ABSTRACT The adsorption of Cu2+ from pharmaceutical wastewater by zeolite was studied in a batch ... more ABSTRACT The adsorption of Cu2+ from pharmaceutical wastewater by zeolite was studied in a batch adsorption system. Factors influencing copper adsorption such as pH (1-5), adsorbent dosage (5-50 g/L) and contact time (20-600 min) were investigated. The equilibrium of adsorption process was established in about 480 min, while pH was 5 and adsorbent dosage was 30 g/L. After the adsorption equilibrium was achieved, the removal efficiency of Cu2+ was above 99%. A comparison of the kinetic models on the overall adsorption rate showed that the adsorption system was best described by the pseudo second-order kinetics. The adsorption equilibrium data fit best with the Langmuir isotherm.
Environmental Science & Technology, 2015
Environmental Earth Sciences, 2015
Environmental Earth Sciences, 2015
ABSTRACT
Bioresource technology, Jan 28, 2015
Long-term effects of ZnO nanoparticles on the system performance of an MBR were investigated toge... more Long-term effects of ZnO nanoparticles on the system performance of an MBR were investigated together with their removal behavior in the system. Continuous operation over 242days showed that ZnO NPs at both 1.0 and 10.0mg/L caused moderate deterioration in the removal of COD, nitrogen and phosphorus. Denitrification was affected upon the exposure but recovered subsequently. Although no significant acute effect on ammonia-oxidization was observed, permanent inhibition occurred after long-term exposure. Nitrite-oxidization was not affected even with 10.0mg/L ZnO NPs. Significant changes were observed in activated sludge properties which resulted in severe membrane fouling. Although ZnO NPs caused changes in the bacteria community structure, the diversity however remain unchanged. ZnO NPs was removed effectively in the MBR (>98%) with biosorption being a major removal mechanism. Membrane filtration also played an important role (20% of the total removal) especially at high ZnO NPs c...
Bioresource technology, 2014
This work reports, for the first time, a new approach to direct phosphorus recovery from municipa... more This work reports, for the first time, a new approach to direct phosphorus recovery from municipal wastewater via an osmotic membrane bioreactor (OMBR). In the OMBR, organic matter and NH4(+) were removed by biological activities. PO4(3)(-), Ca(2+), Mg(2+) and unconverted NH4(+) were rejected by the forward osmosis (FO) membrane and enriched within the bioreactor. The resultant phosphorus-rich supernatant was then used for phosphorus recovery. By adjusting the pH to 8.0-9.5, PO4(3)(-) was recovered via precipitation with Ca(2+), Mg(2+) and NH4(+). The OMBR showed up to 98% overall removal of TOC and NH4(+)-N. At pH 9.0, more than 95% PO4(3)(-)-P was recovered without addition of magnesium and calcium. The precipitates were predominantly amorphous calcium phosphate (ACP) with phosphorus content >11.0%. In principal, this process can recover almost all the phosphorus, apart from the portion assimilated by bacteria. The global phosphorus recovery efficiency was shown to be 50% over ...
2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011
ABSTRACT In order to study the contaminant removal characteristics of constructed wetlands (CWs) ... more ABSTRACT In order to study the contaminant removal characteristics of constructed wetlands (CWs) under high loadings, the performance of CWs planted with Arrowhead, Alisma, Monochoria korsakowii, Thalia dealbata and Oenan the were investigated, respectively, to determine the effects of plants in contaminant removal and for wetland plant selection. The experiment was conducted by sequencing batch feed, with the initial ammonia nitrogen(NH4+-N), total phosphorus(TP)and chemical oxygen demand (COD) concentration of37.7mg/L, 2.1 mg/L and 71.6 mg/L, respectively. The results showed that, for TP removal, the highest removal efficiency of79.01% was acquired in Arrowhead treatment, while other plants treatment showed little difference from unplanted control. For NH4+-N removal, all planted treatments showed superior removal rates than unplanted control, the highest removal rate of 63.67% was also acquired in Arrowhead treatment. For the COD removal, the removal rate of 6treatments all reached 40%-70% and planted treatments performed better than the control treatment, especially for Arrowhead. Generally speaking, Arrowhead was the best plant for CWs under high loadings. Plant factors played an important role in contaminant removal processes of CWs.
2011 5th International Conference on Bioinformatics and Biomedical Engineering, 2011
In order to specify the effects of organic loading on membrane fouling, the relationships of orga... more In order to specify the effects of organic loading on membrane fouling, the relationships of organic loadings, activated sludge properties and membrane fouling rates were studied based on statistical analysis of the long-term operation data of a lab-scale MBR for berberine pharmaceutical wastewater treatment. Results showed that, the activated sludge properties were directly determined by organic loading rate (OLR) and
2011 5th International Conference on Bioinformatics and Biomedical Engineering, 2011
Fosfomycin pharmaceutical wastewater was treated by wet air oxidation (WAO). Two step first-order... more Fosfomycin pharmaceutical wastewater was treated by wet air oxidation (WAO). Two step first-order kinetics were used to investigate the removal of total organic phosphorus (TOP) and chemical oxygen demand (COD) in WAO of fosfomycin pharmaceutical wastewater. The effects of temperature and oxygen partial pressure on TOP and COD removal were quantified. Results showed that, two step first- order kinetics could
2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011
ABSTRACT The tidal-flow constructed wetland is a new type of constructed wetland proposed by the ... more ABSTRACT The tidal-flow constructed wetland is a new type of constructed wetland proposed by the University of Birmingham, U.K. The principal of the wetland takes advantage of the rhythmical movement of wastewater and air which accelerates the alternation of aerobic and anaerobic to realize and enhance pollutant removal. This study focused on two aspects, the different operation performances for treating pollutants at a low temperature in winter between tidal-flow and traditional continuous-flow constructed wetlands, and the influences of treatment efficiency under different operating circumstances. The results showed that, under 0.2m3/m2/dhydraulic load, the removal rates of the three-cycles/d tidal flow constructed wetland for NH4+-N, COD and PO43--P could reach 48.57%, 68.96% and 29.02% respectively, which were about 30%, 20% and 20% higher than these in continuous flow wetlands, correspondingly.
Water science and technology : a journal of the International Association on Water Pollution Research, 2016
The effects of CeO2 nanoparticles (NPs) on the system performance and the bacterial community dyn... more The effects of CeO2 nanoparticles (NPs) on the system performance and the bacterial community dynamics in a sequencing batch reactor (SBR) were investigated, along with the fate and removal of CeO2 NPs within the SBR. Significant impact was observed on nitrification; NH4(+)-N removal efficiency decreased from almost 100% to around 70% after 6 days of continuous exposure to 1.0 mg/L of CeO2 NPs, followed by a gradual recovery until a stable value of around 90% after 20 days. Additionally, CeO2 NPs also led to a significant increase in the protein content in the soluble microbial products, showing the disruptive effects of CeO2 NPs on the extracellular polymeric substance matrix and related activated sludge structure. Denaturing gradient gel electrophoresis analysis showed remarkable changes in the bacterial community structure in the activated sludge after exposure to CeO2 NPs. CeO2 NPs were effectively removed in the SBR mainly via sorption onto the sludge. However, the removal effi...
Journal of Cleaner Production, 2015
ACS Sustainable Chemistry & Engineering, 2015
For the copper-containing berberine wastewater produced by pharmaceutical chemosynthesis of Liaoh... more For the copper-containing berberine wastewater produced by pharmaceutical chemosynthesis of Liaohe River,the Fe-C microelectrolysis reactor-ion exchange column combined process was selected according to the the characteristics of the wastewater.The lab-scale and pilot-scale pretreatments were carried out.The results showed that for the influent wastewater with chemical oxygen demand(COD)concentration of 60 000- 80 000 mg/L,copper concentration of 12 000-18 000 mg/L,berberine concentration of 1 700-1 900 mg/L,the removal efficiencies of berberine and Cu2+ were higher than 99.0 %,and the concentration of berberine and Cu2+ in effluent were lower than 1.0 mg/L and 0.5 mg/L after lab scale experiment.For the pilot scale experiment,the CODCr removal efficiency is higher than 44.0 %,while Cu2+ removal efficiency is higher than 79.0 %.12-13 kg bronze per ton wastewater could be recovered.The Fe-C microelectrolysis reactor-ion exchange column combined process showed good pretreatment effect...
Frontiers of Environmental Science & Engineering in China, 2009
2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011
3per day was carried out for swine wastewater treatment by using of a moving bed biofilm reactor ... more 3per day was carried out for swine wastewater treatment by using of a moving bed biofilm reactor (MBBR). The reactor was start-up in 60 days period and run for a year, and an average removal rate of 82.9% for COD and 89.0% for ammonia were achieved, under a hydraulic retention time (HRT) of 12h, with influent COD and ammonia of 1686 ± 497 mg/L and 582 ± 126 mg/L, respectively. The effluent met the national discharge standard of pollutants for livestock and poultry breeding (GB 18596-2001) of China. The kinetics of organic carbon and ammonia removals in the MBBR was studied based on the Stover-Kincannon model and the 1/2 order substrate removal model, respectively. Temperature coefficient "θ" was introduced into the COD and ammonia removal models to describe the effects of the temperature. The model simulated results showed good agreements with experimental results. The model could be employed for the design of a full-scale MBBR process for simultaneous removal of organic carbon and ammonia from swine wastewaters.
2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011
ABSTRACT The adsorption of Cu2+ from pharmaceutical wastewater by zeolite was studied in a batch ... more ABSTRACT The adsorption of Cu2+ from pharmaceutical wastewater by zeolite was studied in a batch adsorption system. Factors influencing copper adsorption such as pH (1-5), adsorbent dosage (5-50 g/L) and contact time (20-600 min) were investigated. The equilibrium of adsorption process was established in about 480 min, while pH was 5 and adsorbent dosage was 30 g/L. After the adsorption equilibrium was achieved, the removal efficiency of Cu2+ was above 99%. A comparison of the kinetic models on the overall adsorption rate showed that the adsorption system was best described by the pseudo second-order kinetics. The adsorption equilibrium data fit best with the Langmuir isotherm.
Environmental Science & Technology, 2015
Environmental Earth Sciences, 2015
Environmental Earth Sciences, 2015
ABSTRACT
Bioresource technology, Jan 28, 2015
Long-term effects of ZnO nanoparticles on the system performance of an MBR were investigated toge... more Long-term effects of ZnO nanoparticles on the system performance of an MBR were investigated together with their removal behavior in the system. Continuous operation over 242days showed that ZnO NPs at both 1.0 and 10.0mg/L caused moderate deterioration in the removal of COD, nitrogen and phosphorus. Denitrification was affected upon the exposure but recovered subsequently. Although no significant acute effect on ammonia-oxidization was observed, permanent inhibition occurred after long-term exposure. Nitrite-oxidization was not affected even with 10.0mg/L ZnO NPs. Significant changes were observed in activated sludge properties which resulted in severe membrane fouling. Although ZnO NPs caused changes in the bacteria community structure, the diversity however remain unchanged. ZnO NPs was removed effectively in the MBR (>98%) with biosorption being a major removal mechanism. Membrane filtration also played an important role (20% of the total removal) especially at high ZnO NPs c...
Bioresource technology, 2014
This work reports, for the first time, a new approach to direct phosphorus recovery from municipa... more This work reports, for the first time, a new approach to direct phosphorus recovery from municipal wastewater via an osmotic membrane bioreactor (OMBR). In the OMBR, organic matter and NH4(+) were removed by biological activities. PO4(3)(-), Ca(2+), Mg(2+) and unconverted NH4(+) were rejected by the forward osmosis (FO) membrane and enriched within the bioreactor. The resultant phosphorus-rich supernatant was then used for phosphorus recovery. By adjusting the pH to 8.0-9.5, PO4(3)(-) was recovered via precipitation with Ca(2+), Mg(2+) and NH4(+). The OMBR showed up to 98% overall removal of TOC and NH4(+)-N. At pH 9.0, more than 95% PO4(3)(-)-P was recovered without addition of magnesium and calcium. The precipitates were predominantly amorphous calcium phosphate (ACP) with phosphorus content >11.0%. In principal, this process can recover almost all the phosphorus, apart from the portion assimilated by bacteria. The global phosphorus recovery efficiency was shown to be 50% over ...
2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring, 2011
ABSTRACT In order to study the contaminant removal characteristics of constructed wetlands (CWs) ... more ABSTRACT In order to study the contaminant removal characteristics of constructed wetlands (CWs) under high loadings, the performance of CWs planted with Arrowhead, Alisma, Monochoria korsakowii, Thalia dealbata and Oenan the were investigated, respectively, to determine the effects of plants in contaminant removal and for wetland plant selection. The experiment was conducted by sequencing batch feed, with the initial ammonia nitrogen(NH4+-N), total phosphorus(TP)and chemical oxygen demand (COD) concentration of37.7mg/L, 2.1 mg/L and 71.6 mg/L, respectively. The results showed that, for TP removal, the highest removal efficiency of79.01% was acquired in Arrowhead treatment, while other plants treatment showed little difference from unplanted control. For NH4+-N removal, all planted treatments showed superior removal rates than unplanted control, the highest removal rate of 63.67% was also acquired in Arrowhead treatment. For the COD removal, the removal rate of 6treatments all reached 40%-70% and planted treatments performed better than the control treatment, especially for Arrowhead. Generally speaking, Arrowhead was the best plant for CWs under high loadings. Plant factors played an important role in contaminant removal processes of CWs.
2011 5th International Conference on Bioinformatics and Biomedical Engineering, 2011
In order to specify the effects of organic loading on membrane fouling, the relationships of orga... more In order to specify the effects of organic loading on membrane fouling, the relationships of organic loadings, activated sludge properties and membrane fouling rates were studied based on statistical analysis of the long-term operation data of a lab-scale MBR for berberine pharmaceutical wastewater treatment. Results showed that, the activated sludge properties were directly determined by organic loading rate (OLR) and
2011 5th International Conference on Bioinformatics and Biomedical Engineering, 2011
Fosfomycin pharmaceutical wastewater was treated by wet air oxidation (WAO). Two step first-order... more Fosfomycin pharmaceutical wastewater was treated by wet air oxidation (WAO). Two step first-order kinetics were used to investigate the removal of total organic phosphorus (TOP) and chemical oxygen demand (COD) in WAO of fosfomycin pharmaceutical wastewater. The effects of temperature and oxygen partial pressure on TOP and COD removal were quantified. Results showed that, two step first- order kinetics could