scholarly journals Comparison of Swine Wastewater Treatment by Microalgae and Heterotrophic Nitrifiers: Focusing on Nitrogen Removal Mechanism Revealed by Microbiological Correlation Analysis

2021 ◽  
Author(s):  
Hui Liu ◽  
Junyu Liang ◽  
Giorgos Markou ◽  
Zhaofeng Song ◽  
Jianfeng Ye
Keyword(s):  
Correlation Analysis ◽  
Nitrogen Removal ◽  
Ammonia Nitrogen ◽  
Heterotrophic Nitrification ◽  
Swine Wastewater ◽  
Nitrifying Bacteria ◽  
Nitrogen Transfer ◽  
Bacterial Strains ◽  
Removal Efficiencies ◽  
Heterotrophic Nitrifying Bacteria

Abstract Swine wastewater (SW) poses a great threat to the environment due to its high-nutrient profiles if not properly managed. Advanced biological treatment method is an efficient method to treat SW by screening potent microalgae or bacterial strains. In this study, activated sludge, nine locally isolated heterotrophic nitrification bacteria and one microalgal strain (Chlorella) were used as inoculums in treating a local SW. Their treatment efficiencies were compared, while the nitrogen removal mechanisms and microbiome profile were explored in detail. It was found that certain heterotrophic nitrification strains had a slight advantage in removing chemical oxygen demand and phosphorus from SW, with the highest removal efficiencies of 83.9% and 76.2%, respectively. The removal efficiencies of ammonia nitrogen and total nitrogen in wastewater by microalgae reached 80.9% and 66.0% respectively, which were far higher than all the heterotrophic nitrification strains. Biological assimilation was the main pathway of nitrogen conversion by microalgae and heterotrophic nitrifying bacteria; especially microalgae showed excellent biological assimilation performance. Correlation analysis showed that Comamonas was highly positively correlated with nitrogen assimilation, while Acidovorax was closely correlated with simultaneous nitrification and denitrification. This study gives a comparison of microalgae and heterotrophic nitrifying bacteria on the nitrogen transfer and transformation pathways.

The Study on the Removal of Ammonia Nitrogen in Wastewater by Thin Film Coating Photo-Catalytic Oxidation Process

2013 ◽  
Vol 302 ◽  
pp. 119-123
Author(s):  
Hyun Jong Joo ◽  
Jung Soo Choi ◽  
Dong Wook Kwon ◽  
Sung Chang Hong
Keyword(s):  
Thin Film ◽  
Nitrogen Removal ◽  
Treatment Process ◽  
Film Coating ◽  
Ammonia Nitrogen ◽  
Nitrifying Bacteria ◽  
Thin Film Coating ◽  
Treatment Unit ◽  
Photo Catalyst ◽  
New Process

A new process for advanced wastewater treatment process has been devised with auxiliary treatment unit employing the ammonia oxidizing photo-catalytic thin film. In winter time, due to low water temperature, conventional nitrogen removal treatment experiences almost no nitrification by nitrifying bacteria. To solve the problem and to meet the governmental effluent guideline the treated water has been recycled through the auxiliary unit in which the auxiliary system was applied with the thin film coating photo-catalyst. This study also identifies the characteristics of the thin film coating-photo-catalyst through XRD, SEM and analyzes the ammonia nitrogen removal efficiency by using the thin film coating photo-catalyst in the reactor which resembles a sewage treatment process. The evaluation of the entire process of biological treatment in accord with the application of thin film coating photo-catalyst was performed through computer simulation. A relevant computer model for mass balance was made and utilized to select proper optimal operating condition such as recycle ratio. Result shows the proposed new process has potential applicability to renovate existing treatment plants.

The influence of changes in groundwater composition on the efficiency of manganese and ammonia nitrogen removal on mature quartz sand filtering beds

2001 ◽  
Vol 1 (2) ◽  
pp. 91-98 ◽  
Author(s):  
R. Bray ◽  
K. Olańczuk-Neyman
Keyword(s):  
Dissolved Oxygen ◽  
Nitrogen Removal ◽  
Quartz Sand ◽  
Nitrogen Concentration ◽  
Ammonia Nitrogen ◽  
Manganese Concentration ◽  
Nitrifying Bacteria ◽  
Lag Phase ◽  
Water Composition ◽  
Oxygen Concentrations

The results of investigations of natural groundwater treatment containing increased manganese and ammonia nitrogen concentrations are presented. The main aim of the work was to show the influence of changes in water composition on manganese and ammonia nitrogen removal from groundwater on second-stage mature quartz sand filters. According to the results obtained, the efficiency of manganese elimination from water did not depend on periodic changes in ammonia nitrogen or dissolved oxygen concentrations. However, if low oxygen concentrations (lower than 2 mg/dm3) were maintained for a longer time, the manganese concentration in the filtrate gradually increased. The ammonia nitrogen concentration in the filtered water appeared to be the most relevant factor affecting the efficient removal of manganese and the dissolved oxygen concentration was less important. The nitrification process appeared to be vulnerable to changes in the concentrations of the substrates: ammonia nitrogen (either an increase or decrease) and oxygen (an decrease). It was observed that it is necessary for nitrifying bacteria to adapt (lag phase) to rapidly changing water composition. Due to the sorption process, the inhibition of nitrification on the filtering beds did not significantly influence the efficiency of ammonia nitrogen removal.

Impact of Partial Backwashing to Ammonia Nitrogen Removal in Biological Aerated Filter

2011 ◽  
Vol 183-185 ◽  
pp. 720-724 ◽  
Author(s):  
Ping Li ◽  
Li Long Yan ◽  
Fang Ma
Keyword(s):  
Low Temperature ◽  
Protective Effect ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Ammonia Removal ◽  
Nitrifying Bacteria ◽  
Biological Aerated Filter ◽  
Previous Level ◽  
Aerated Filter

Biological Aerated Filter has the drawback of severe plug under low temperature, and frequent back-washing would cause the bad performance of ammonia removal. To solve these shortcomings, partial backwashing experiment was carried out to test its amelioration effect on Biological Aerated Filter. The result showed that performing backwashing at the 40 cm of filter had strong protective effect on nitrifying bacteria, the ammonia removal could be improved gradually with the highest removal rate of 71.71%. Partial backwashing affected less on ammonia removal and the removal efficiency could be restored to the previous level after the backwashing completed for 2.5 h.

Study on Anaerobic Simultaneous Denitrification and Methanogenesis Combined with Shortcut Nitrification Process Treating Piggery Wastewater

2012 ◽  
Vol 178-181 ◽  
pp. 680-687
Author(s):  
Ru Liu ◽  
Ying Hao Song ◽  
Huan Sheng Wang
Keyword(s):  
Nitrogen Removal ◽  
Granular Sludge ◽  
Ammonia Nitrogen ◽  
Reflux Ratio ◽  
Combined System ◽  
Piggery Wastewater ◽  
Anaerobic Reactor ◽  
Whole Process ◽  
Nitrite Removal ◽  
Removal Efficiencies

An expanded granular sludge bed (EGSB) was combined with an anaerobic/anoxic/oxic process (A2/O) to treat piggery wastewater, in which the EGSB was used as a simultaneous methanogenesis and denitrification reactor and the A2/O as an shortcut nitrification reactor. The results showed that: 1) The COD of effluent in anaerobic reactor increased in earlier stage and decreased in later stage with increasing reflux ratios each time, and reached to about 550 mg/L finally. The COD removal efficiencies of the whole process were about 150 mg/L, and almost not affected by different reflux ratios. 2) Simultaneous denitrification and methanogenesis realized successfully after the aerobic effluent recirculated to the anaerobic reactor. The highest nitrite loading reached 1.48 kg/m3.d with constant increase of reflux ratio, while nitrite removal efficiencies were always 100%. 3) Short-cut nitrification was perfored steadily in the whole combined system. When reflux ratios were 50%, 100%, 200%, 300%, respectively, ammonia nitrogen removal efficiencies were all 100%, and total nitrogen removal efficiencies were 52.3%, 53.1%, 68.7%,85.1%, respectively. 4) The first reaction was denitrification when nitrite was recycled to anaerobic reactor, so methane contents were very little in earlier stage with increasing reflux ratios every time, but increased gradually after a period of operation.

scholarly journals Ammonia Nitrogen Removal and Recovery from Swine Wastewater by Microwave Radiation

2014 ◽  
Vol 19 (4) ◽  
pp. 381-385 ◽  
Author(s):  
Joohee La ◽  
Taeyoung Kim ◽  
Jae Kyung Jang ◽  
In Seop Chang
Keyword(s):  
Microwave Radiation ◽  
Nitrogen Removal ◽  
Ammonia Nitrogen ◽  
Swine Wastewater ◽  
Removal And Recovery

Research of Carbon and Nitrogen Ratio and Sludge Stability in Aerobic Granular Sludge Bioreactor

2012 ◽  
Vol 518-523 ◽  
pp. 473-477
Author(s):  
Xia Zhao ◽  
Hui Xia Feng ◽  
Feng Jiang ◽  
Na Li Chen ◽  
Xiao Chun Wang
Keyword(s):  
Removal Efficiency ◽  
Nitrogen Removal ◽  
Removal Rate ◽  
Batch Reactor ◽  
Granular Sludge ◽  
Ammonia Nitrogen ◽  
Nitrifying Bacteria ◽  
Aerobic Granular Sludge ◽  
Nitrogen Ratio ◽  
The Stability

In sequencing batch reactor aerobic granular sludge was cultivated, and the influence of influent C/N ratio to aerobic granular sludge was studied. The results showed that the granulation and the settling ability of the sludge were poor in high C/N, however, low C/N was beneficial to the accumulation of microorganism in reactor and MLSS could reach to as high as 8740 mg/L. Lower C/N ratio would lead to increase of particle size and disintegrate of loose structure and overgrowth on filamentous microbe, these were disadvantage of the stability of the system. It was not obvious that influent C/N ratio affected on the organic removal. The COD removal maintained at 87% after the preliminary form particles were formed in reactor. When C/N ratio was 100:15~100:35, the phosphorus removal efficiency was good. If C/N ratio was too high or too low, the formation of sludge granulation would be affected in the process. The influence of C/N ratio to ammonia nitrogen removal efficiency was obvious. While C/N ratio was 100:10, granular sludge had good simultaneous nitrification and denitrification performance, and the average removal of ammonia nitrogen attained to 91%. But low C/N ratio was able to inhibit the activity of nitrifying bacteria and denitrifying bacteria. At that time, ammonia nitrogen removal rate declined sharply in the system.

Enhanced treatment of tannery wastewater in an integrated multistage bioreactor (IMBR) by the predominant bacterial strains enriched from marine sediments

2015 ◽  
Vol 73 (4) ◽  
pp. 807-817
Author(s):  
Guangdao Huang ◽  
Guofeng Fan ◽  
Guoguang Liu
Keyword(s):  
Marine Sediments ◽  
Performance Modeling ◽  
Oxygen Demand ◽  
Heterotrophic Nitrification ◽  
Tannery Wastewater ◽  
Bacterial Strains ◽  
Waste Sludge ◽  
Empirical Performance ◽  
Removal Efficiencies ◽  
High Concentrations

An innovative integrated multistage bioreactor (IMBR) system, which was augmented with three predominant bacterial strains (Lactobacillus paracasei CL1107, Pichia jadinii CL1705, and Serratia marcescens CL1502) isolated from marine sediments, was developed to treat real tannery wastewater without performing physicochemical pretreatment, with the potential to reduce the generation of waste sludge and odors. The performance of the IMBR treatment system, with and without the inclusion of the predominant bacterial strains, was compared. The results indicated that the performance of the IMBR system without bioaugmentation by the predominant bacterial strains was poor. However, when in the presence of the predominant bacterial strains, the IMBR system exhibited high removal efficiencies of chemical oxygen demand (COD) (97%), NH4+-N (97.7%), and total nitrogen (TN) (90%). In addition, the system had the capacity for the simultaneous removal of organics and nitrogen, heterotrophic nitrification and denitrification being carried out concurrently, thereby avoiding the strong inhibition of high concentrations of COD on nitrification. The system possessed excellent adaptability and ability to resist influent loading fluctuations, and had a good alkalinity balance such that it could achieve a high NH4+-N, and TN removal efficiency without a supplement of external alkalinity. In addition, an empirical performance modeling of the IMBR system was analyzed.

Characteristics and the Basic Kinetics of Ammonium Removal by Heterotrophic Nitrifying Bacteria at Low Temperature

2013 ◽  
Vol 807-809 ◽  
pp. 327-331
Author(s):  
Xiao Fei Huang ◽  
Wei Guang Li ◽  
Duo Ying Zhang ◽  
Wen Qin
Keyword(s):  
Low Temperature ◽  
Carbon Sources ◽  
Ammonia Nitrogen ◽  
Nitrifying Bacteria ◽  
Optimum Conditions ◽  
Songhua River ◽  
Rotating Speed ◽  
Ammonium Removal ◽  
Heterotrophic Nitrifying Bacteria ◽  
Kinetics Of

A oligotrophic heterotrophic nitrifying bacterium Y21 was isolated from Songhua River at low temperature. The influence of temperature, pH, rotating speed of shaker as well as the carbon sources on the strain Y21 was investigated in this study. The experimental results showed that for the strain Y21, the optimum conditions were found to be temperature of 15 °C, pH of 7.4~8.2, shaking speed of 140 rmp respectively, with sodium acetate as carbon source. The strain Y21 has high activity under the culture condition at low temperature. The basic dynamic equation for the degradation of ammonia-nitrogen was obtained.

Biological phosphate and nitrogen removal in a biofilm sequencing batch reactor

1996 ◽  
Vol 34 (1-2) ◽  
pp. 293-301 ◽  
Author(s):  
Marco A. Garzón-Zúñiga ◽  
Simón González-Martínez
Keyword(s):  
Nitrogen Removal ◽  
Sequencing Batch Reactor ◽  
Municipal Wastewater ◽  
Batch Reactor ◽  
Pilot Scale ◽  
Ammonia Nitrogen ◽  
Optimal Operation ◽  
Nitrifying Bacteria ◽  
Phase Duration ◽  
Operation Conditions

The possibility of joining biological phosphorus and nitrogen removal in a biofilm sequencing batch reactor was studied using an operation strategy with four reaction phases: Anaerobic/Aerobic/Anoxic/Aerobic. A 1,000 liter pilot scale reactor, filled with Pall-Rings as biofilm support was fed with municipal wastewater. After operating the system for 615 days, optimal operation conditions were establish to obtain highest removal rates with a well established microbial community. Adequate cycle and phase duration were established and organic loading values were obtained for different treatment purposes. The system worked successfully obtaining removals of COD, phosphates and ammonia nitrogen of 89 ± 1%, 75 ± 15%, and 87 ± 10%, respectively. The high removal efficiencies of P and N were obtained thanks to the establishing relationship between nitrifying bacteria and phosphate accumulating bacteria.

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