Effect of Phenol on Treatment of Sewage from Channel Discharge with Biological Accelerator-Biofilm Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.3761 ◽

2011 ◽

Vol 243-249 ◽

pp. 3761-3764

Author(s):

Gai Mei Guo

Keyword(s):

Treatment Process ◽

Sewage Treatment ◽

Ammonia Nitrogen ◽

Removal Rates ◽

Promotion Effect ◽

Initial Concentration ◽

Research Results ◽

Negative Effect ◽

Biofilm Process

The research studied enhanced treatment of sewage from discharging points of rivers by biofilm process dosing with enzyme and the effect of phenol on removal rates of the main pollution indexes, and investigated promotion effect of enzyme (including the laboratory developed compounded enzyme and the foreign composite enzyme) on treatment of sewage by biofilm process. The research results indicated that when initial concentration of phenol was 5mg/L, the removal rates of phenol, CODCrand ammonia nitrogen obviously decreased compared to no phenol added to reactor A, B and C, and the negative effect of phenol was smaller on reactor B and C than on reactor A. Moreover, enzyme had good promotion effect on biofilm process during the sewage treatment process.

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Effect of Mineral Oil on Sewage Disposal by Biofilm Process Dosing with Enzyme

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.3743 ◽

2011 ◽

Vol 243-249 ◽

pp. 3743-3746

Author(s):

Gai Mei Guo

Keyword(s):

Treatment Process ◽

Sewage Treatment ◽

Mineral Oil ◽

Ammonia Nitrogen ◽

Removal Rates ◽

Sewage Disposal ◽

Promotion Effect ◽

Research Results ◽

Biofilm Process

The research studied enhanced treatment of sewage from discharging points of rivers by biofilm process dosing with enzyme and the effect of mineral oil on removal rates of the main pollution indexes, and investigated promotion effect of enzyme (including the laboratory developed compounded enzyme and the foreign composite enzyme) on treatment of sewage by biofilm process. The research results indicated that when mineral oil with the concentration of 20mg/L was added to reactor A, B and C, respectively, the removal rates of mineral oil, CODCrand ammonia nitrogen all obviously decreased. Meanwhile, the removal rates of mineral oil, CODCrand ammonia nitrogen were higher in reactor B and C than in reactor A, and the removal rates of them in reactor B were similar to them in reactor C, which indicated that enzyme had good promotion effect on biofilm process during the sewage treatment process.

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Study on Treatment of Sewage from Channel Discharge with Biological Accelerator-Biofilm Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.183-185.644 ◽

2011 ◽

Vol 183-185 ◽

pp. 644-648

Author(s):

Gai Mei Guo ◽

Hui Fen Qin

Keyword(s):

Treatment Effect ◽

Treatment Process ◽

Removal Rate ◽

Sewage Treatment ◽

Ammonia Nitrogen ◽

Promoting Effect ◽

Research Results ◽

The Difference ◽

Biofilm Process

This paper studied treatment of sewage from channel discharge with biological accelerator-biofilm process, and investigated the promoting effect of biological accelerator on biofilm process during the sewage treatment process. Meanwhile, compared the difference between the laboratory developed compounded enzyme and the foreign composite enzyme. The research results indicated that using biofilm process, the composite enzyme-biofilm process and the compounded enzyme-biofilm process for treating sewage, the removal rate of CODcr was separately 70.5%, 78.4% and 74.0% and that of ammonia nitrogen was separately 38.2%, 48.6% and 45.9%, which accounted for that under the strengthening action of biological accelerator, the treatment effect was remarkable for using biofilm process disposing channel disordered discharge sewage. Furthermore, the promoting effect of the compounded enzyme was equivalent to that of the composite enzyme for biofilm process, and the compounded enzyme could come into use instead of the composite enzyme.

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Effect of Temperature on Enhanced Treatment of Sewage from Discharging Points of Rivers by Biofilm Process Dosing with Enzyme

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.3747 ◽

2011 ◽

Vol 243-249 ◽

pp. 3747-3750

Author(s):

Gai Mei Guo

Keyword(s):

Removal Rate ◽

Ammonia Nitrogen ◽

The Other ◽

Effect Of Temperature ◽

Optimal Temperature ◽

Removal Rates ◽

Promotion Effect ◽

Research Results ◽

Other Hand ◽

Biofilm Process

The research studied enhanced treatment of sewage from discharging points of rivers by biofilm process dosing with enzyme and promotion effect of enzyme on treatment of sewage by biofilm process, and investigated the changes of removal rates of the main pollution indexes at different temperature to ensure the optimal temperature. The research results indicated that temperature was an important factor influencing the removal rates of the main pollution indexes. When temperature was in the range of 5°C-8°C, the promotion effects of enzyme on the removals of CODCrand ammonia nitrogen (NH3-N) of sewage by biofilm process were not obvious. However when temperature were in the ranges of 15°C -18°C and 22°C -25°C, enzyme had the high promotion effects on the removals of the pollution indexes. Furthermore, within the certain temperature (5°C -25°C), the removal rates of CODCrand NH3-N were on the rise with the increase of temperature. When temperature increased from 5°C -8°C to 15°C -18°C, the removal rate of CODCrobviously increased, but when temperature continued to increase to 25, the rise trend of the removal rate of CODCrbecame slow. On the other hand, when temperature increased from 5°C -8°C to 22°C -25°C, the increase of the removal rate of NH3-N was always evident. Therefore, the optimal temperature was in the range of 22°C -25°C for the enhanced treatment of sewage from discharging points of rivers by biofilm process dosing with enzyme.

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Effect of the Ratio of CODCr to Total Nitrogen on Enhanced Treatment of Sewage from Discharging Points of Rivers by Enzyme-Biofilm Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.243-249.3751 ◽

2011 ◽

Vol 243-249 ◽

pp. 3751-3754

Author(s):

Gai Mei Guo

Keyword(s):

Total Nitrogen ◽

Removal Rate ◽

Removal Rates ◽

Promotion Effect ◽

Research Results ◽

Biofilm Process

The research studied enhanced treatment of sewage from discharging points of rivers by biofilm process dosing with enzyme and promotion effect of enzyme on treatment of sewage by biofilm process, and investigated the effect of the ratio of CODCr to total nitrogen (C/N) on removals of pollution indexes. The research results indicated that with the decrease of C/N, the removal rates of CODCrwere stable and the removal rates of NH3-N increased, but the removal rates of TN obviously decreased in the three reactors. When C/N=5, the average removal rate of TN was higher than 30% in reactor B and C. When C/N=3, it decreased and maintained about 30%. When C/N=2, it was low and approximately 20%. When C/N=5, 3 or 2，the removal rates of CODCr, NH3-N and TN greatly increased in reactor B and C than in reactor A, which indicated that the promotion effects of the composite enzyme and the compounded enzyme on the removals of the target pollutants were favorable.

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Graphene-Modulated Removal Performance of Nitrogen and Phosphorus Pollutants in a Sequencing Batch Chlorella Reactor

Materials ◽

10.3390/ma11112181 ◽

2018 ◽

Vol 11 (11) ◽

pp. 2181 ◽

Cited By ~ 2

Author(s):

Gonghan Xia ◽

Wenlai Xu ◽

Qinglin Fang ◽

Zishen Mou ◽

Zhicheng Pan

Keyword(s):

Optical Microscopy ◽

Sewage Treatment ◽

Ammonia Nitrogen ◽

Pollutant Removal ◽

Plate Count ◽

Nitrogen And Phosphorus ◽

Removal Rates ◽

Practical Support ◽

Plate Count Method ◽

The Impact

In this work, the influence of graphene on nitrogen and phosphorus in a batch Chlorella reactor was studied. The impact of graphene on the removal performance of Chlorella was investigated in a home-built sewage treatment system with seven identical sequencing batch Chlorella reactors with graphene contents of 0 mg/L (T1), 0.05 mg/L (T2), 0.1 mg/L (T3), 0.2 mg/L (T4), 0.4 mg/L (T5), 0.8 mg/L (T6) and 10 mg/L (T7). The influence of graphene concentration and reaction time on the pollutant removal performance was studied. The malondialdehyde (MDA) and total superoxide dismutase (SOD) concentrations in each reactor were measured, and optical microscopy and scanning electron microscopy (SEM) characterizations were performed to determine the related mechanism. The results show that after 168 h, the total nitrogen (TN), ammonia nitrogen (AN) and total phosphorus (TP) removal rates of reactors T1–T7 become stable, and the TN, AN and TP removal rates were gradually reduced with increasing graphene concentration. At 96 h, the concentrations of both MDA and SOD in T1–T7 gradually increased as the graphene concentration increased. In optical microscopy and SEM measurements, it was found that graphene was adsorbed on the surface of Chlorella, and entered Chlorella cells, deforming and reducing Chlorella. Through the blood plate count method, we estimated an average Chlorella reduction of 16%. According to the water quality and microscopic experiments, it can be concluded that the addition of graphene causes oxidative damage to microalgae and destruction of the Chlorella cell wall and cell membrane, inhibiting the nitrogen and phosphorus removal in Chlorella reactors. This study provides theoretical and practical support for the safe use of graphene.

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Study on Sewage Disposal by Bio-Film Process Dosing with Enzyme

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.236-238.478 ◽

2011 ◽

Vol 236-238 ◽

pp. 478-481

Author(s):

Zheng Hua Liu ◽

Hong Ying Chen

Keyword(s):

Treatment Process ◽

Sewage Treatment ◽

Sewage Disposal ◽

Promotion Effect ◽

The Impact

The paper studied enhanced treatment of sewage from discharging points of rivers by bio-film process dosing with enzyme and investigated the promotion effect of enzyme on treatment of sewage by bio-film process. The removal of phenol in sewage was also researched. The experiments results indicated that during the ebb tide, the remove rate of phenol was stable (33%) on the eighth day in the dosing pools and it was stable (31.6%) on the eighth day in the contrast pool. During the rising tide, the remove rate of phenol was stable (30%) on the eighth day in the dosing pools and it was stable (27.2%) on the eighth day in the contrast pool. It indicated that enzyme had good promotion effect on bio-film process during the sewage treatment process. Biological accelerator-bio-film process could effectively reduce the impact of sewage on river and it had a good application prospect as the auxiliary means for water restore.

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Influence of pathogenic bacterial activity on growth of Scenedesmus sp. and removal of nutrients from public market wastewater

Journal of Water and Health ◽

10.2166/wh.2017.080 ◽

2017 ◽

Vol 15 (5) ◽

pp. 741-756 ◽

Cited By ~ 9

Author(s):

A. A. Al-Gheethi ◽

R. M. Mohamed ◽

N. M. Jais ◽

A. N. Efaq ◽

Abdullah Abd Halid ◽

...

Keyword(s):

Pathogenic Bacteria ◽

Treatment Process ◽

Kinetic Coefficient ◽

Strong Relationship ◽

Bacterial Activity ◽

Removal Rates ◽

Initial Concentration ◽

The Public ◽

Public Market ◽

Survival Potential

The present study aims to investigate the influence of Staphylococcus aureus, Escherichia coli and Enterococcus faecalis in public market wastewater on the removal of nutrients in terms of ammonium (NH4–) and orthophosphate (PO43) using Scenedesmus sp. The removal rates of NH4– and orthophosphate PO43– and batch kinetic coefficient of Scenedesmus sp. were investigated. The phycoremediation process was carried out at ambient temperature for 6 days. The results revealed that the pathogenic bacteria exhibited survival potential in the presence of microalgae but they were reduced by 3–4 log at the end of the treatment process. The specific removal rates of NH4– and PO43– have a strong relationship with initial concentration in the public market wastewater (R2 = 0.86 and 0.80, respectively). The kinetic coefficient of NH4– removal by Scenedesmus sp. was determined as k = 4.28 mg NH4– 1 log10 cell mL–1 d–1 and km = 52.01 mg L–1 (R2 = 0.94) while the coefficient of PO43– removal was noted as k = 1.09 mg NH4– 1 log10 cell mL–1 d–1 and km = 85.56 mg L–1 (R2 = 0.92). It can be concluded that Scenedesmus sp. has high competition from indigenous bacteria in the public market wastewater to remove nutrients, with a higher coefficient of removal of NH4– than PO43.

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Enhanced physicochemical-biological sewage treatment process in cold regions

Water Science & Technology ◽

10.2166/wst.2014.376 ◽

2014 ◽

Vol 70 (9) ◽

pp. 1456-1464 ◽

Cited By ~ 2

Author(s):

Guoren Xu ◽

Chao Jia ◽

Zhao Zhang ◽

Yunlong Jiang

Keyword(s):

Membrane Filtration ◽

Treatment Process ◽

Sewage Treatment ◽

Oxygen Demand ◽

Ammonia Nitrogen ◽

Pollutant Removal ◽

Wastewater Treatment Process ◽

Cold Regions ◽

Removal Efficiencies ◽

Northeast Of China

Biological treatment processes give relatively poor pollutant removal efficiencies in cold regions because microbial activity is inhibited at low temperatures. We developed an enhanced physicochemical-biological wastewater treatment process that involves micro-membrane filtration, anaerobic biofilter, and aerobic biofilter to improve the pollutant removal efficiencies that can be achieved under cold conditions. Full-scale experiments using the process were carried out in the northeast of China, at outdoor temperatures of around −30 °C. The average removal efficiencies achieved for chemical oxygen demand, total phosphorus, ammonia nitrogen, and suspended solids were 89.8, 92.9, 94.3, and 95.8%, respectively, using a polyaluminium chloride dosage of 50 mg L−1. We concluded that the process is effective to treat sewage in cold regions.

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