scholarly journals The Influence of Different Operation Conditions on the Treatment of Mariculture Wastewater by the Combined System of Anoxic Filter and Membrane Bioreactor

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 729
Author(s):  
Yi Ding ◽  
Zhansheng Guo ◽  
Binyu Ma ◽  
Fang Wang ◽  
Hong You ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Total Nitrogen ◽  
Membrane Bioreactor ◽  
Ammonia Nitrogen ◽  
Phosphate Removal ◽  
Combined System ◽  
Operation Conditions ◽  
Removal Efficiencies ◽  
Total Nitrogen Removal ◽  
Better Than

The mariculture wastewater treatment performance for the combined system of anoxic filter and membrane bioreactor (AF-MBR) was investigated under different hydraulic retention times (HRTs), influent alkalinity, and influent ammonia nitrogen load. The results showed that the removal efficiencies of TOC and total nitrogen were slightly better at the HRT of 8 h than at other HRTs, and the phosphate removal efficiency decreased with the increase of HRT. With the increase of influent alkalinity, the removal of TOC and phosphate did not change significantly. With the increase of influent alkalinity from 300 mg/L to 500 mg/L, the total nitrogen removal efficiency of AF-MBR was improved, but the change of the removal efficiency was not obvious when the alkalinity increased from 500 mg/L to 600 mg/L. When the influent concentration of ammonia nitrogen varied from 20 mg/L to 50 mg/L, the removal efficiencies of TOC, phosphate, and total nitrogen by AF-MBR were stable. An interesting finding was that in all the different operation conditions examined, the treatment efficiency of AF-MBR was always better than that of the control MBR. The concentrations of NO3−-N in AF-MBR were relatively low, whereas NO3−-N accumulated in the control MBR. The reason was that the microorganisms attached to the carrier and remained fixed in the aerobic and anoxic spaces, so that there was a gradual enrichment of bacteria characterized by slow growth in a high-salt environment. In addition, the microorganisms could gather and grow on the carrier forming a biofilm with higher activity, a richer and more stable population, and enhanced ability to resist a load impact.

Effect of Ca2+ and Fe3+ Addition on Nitrification-Denitrification Process in a Membrane Bioreactor

2012 ◽  
Vol 610-613 ◽  
pp. 422-427 ◽  
Author(s):  
Mo Jie Sun ◽  
Hong Hong Wang ◽  
Hai Feng Zhang
Keyword(s):  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Ion Concentration ◽  
Ferric Ion ◽  
Submerged Membrane Bioreactor ◽  
Total Nitrogen Removal ◽  
Denitrification Process

Study on the effect of Ca2+and Fe3+addition on nitrification-denitrification process in a submerged membrane bioreactor was conducted. The removal rate of total nitrogen and ammonia nitrogen was investigated. The result indicated that the ammonia nitrogen and total nitrogen removal rate increased from 75% to 85% and 55% to 75%, respectively, as the calcium concentration ranging from 0 to 150 mg/L, which indicated that the nitrification and denitrification process were promoted. Ferric ion of 50 mg/L obtained a considerable increase in TN removal from 55% to 70% ,with an increase of ammonia nitrogen removal rate from 75% to 83%. However, ferric ion concentration ranging between 100 mg/L and 150mg/L caused a decrease of both total nitrogen and ammonia nitrogen removal efficiency, indicating that the activity of nitrifying and denitrifying bacteria was inhibited.

Model-based evaluation of COD influence on a partial nitrification-Anammox biofilm (CANON) process

2004 ◽  
Vol 49 (11-12) ◽  
pp. 83-90 ◽  
Author(s):  
X.-D. Hao ◽  
M.C.M. van Loosdrecht
Keyword(s):  
Removal Efficiency ◽  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Integrated Model ◽  
Partial Nitrification ◽  
Heterotrophic Growth ◽  
Major Contributor ◽  
Total Nitrogen Removal ◽  
Biofilm Process ◽  
Canon Process

A model evaluating COD influence on a partial nitrification-Anammox biofilm process is integrated on the basis of heterotrophic growth as described in ASM3, combined with a previously published model for the CANON process. This integrated model can simulate the activities of heterotrophs and autotrophs involved in a biofilm, and interactions between COD oxidation, denitrification, nitrification and Anammox can be evaluated. Simulations indicate that COD in the influent has no important influence on the trends in the partial nitrification-Anammox biofilm process. Besides full COD removal, a total nitrogen removal efficiency of about 90% can be expected for stable biofilm systems. Furthermore, Anammox is a major contributor to the total nitrogen removal in stable biofilm systems and conventional denitrification only takes a share of <20% in the total nitrogen removal.

Effect of biochar addition on the removal of organic and nitrogen pollutants from leachate treated with a semi-aerobic aged refuse biofilter

2020 ◽  
Vol 38 (10) ◽  
pp. 1176-1184
Author(s):  
Xuqin Pan ◽  
Maonan Chen ◽  
Fan Wang ◽  
Qibin Li
Keyword(s):  
Total Nitrogen ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Pollutant Removal ◽  
Dissolved Oxygen Concentration ◽  
Surface Functional Groups ◽  
Nitrogen Emission ◽  
Aged Refuse ◽  
Total Nitrogen Removal ◽  
Nitrogen Pollutants

The effect of biochar on the removal of organic and nitrogen contaminants from leachate in a semi-aerobic aged refuse biofilter (SAARB) was investigated. A preset amount of biochar was mixed with the aged refuse to explore the enhancement ability of pollutant removal by characterizing the leachate effluent and gas. The results showed that biochar contributed to the removal of organic and nitrogen pollutants from the leachate and that increasing the amount of biochar added led to higher colour number, chemical oxygen demand, ammonia nitrogen, and total nitrogen removal efficiencies. Furthermore, the addition of biochar significantly increased the removal of large molecule organic pollutants from the leachate. The improved removal of organics was due to the considerable number of surface functional groups and the large surface area of the biochar, which effectively absorbed and removed a significant amount of the organic matter from the leachate. Biochar elevated the dissolved oxygen concentration in the semi-aerobic system, which facilitated the completion of the nitrification reaction. It also promoted denitrification by acting as a supplementary carbon source. The nitrous oxide (N2O) emissions decreased as the amount of biochar added increased. When the biochar proportion reached 3%, the N2O emission was only 1.11% of the original total nitrogen and the di-nitrogen emission was 19.61%. The findings of this study can be used to improve the treatment of leachate using biochar combined with a SAARB.

Performance of a baffled facultative pond treating piggery wastes

2002 ◽  
Vol 45 (1) ◽  
pp. 49-53 ◽  
Author(s):  
C.T. Zanotelli ◽  
W. Medri ◽  
P. Belli Filho ◽  
C.C. Perdomo ◽  
M.R. Mulinari ◽  
...  
Keyword(s):  
Chemical Oxygen Demand ◽  
Removal Efficiency ◽  
Total Nitrogen ◽  
Total Phosphorus ◽  
Oxygen Demand ◽  
Faecal Coliforms ◽  
The West ◽  
West Region ◽  
Removal Efficiencies ◽  
Water Hyacinths

This paper shows the performance of a baffled facultative pond for the treatment of piggery wastes. The full-scale system is composed of an equalizer, one decanter (DP), two anaerobic ponds (LA1 and LA2), one facultative pond (LF), with five baffles, and one maturation pond with water hyacinths (LAG). The studies were conducted over a 12 month period in the west region of Santa Catarina, Brazil. The system was supplied daily with a volume of 3 m3/day of farm wastes. A good performance of the treatment system was obtained with average removal efficiencies of 98% for chemical oxygen demand, 93% for total solids, 98% for total phosphorus, 92% for total nitrogen, 7 log units of faecal coliforms and 5 log units of total coliforms. The facultative pond performed well, removing 43% of the chemical oxygen demand, 47% of total nitrogen and 54% of total phosphorus. It was found that the first baffle in the facultative pond was mainly responsible for the efficiency of this pond, and compared with another study the introduction of the baffles improved the removal efficiency by 20% for total phosphorus.

An Experimental Study on the Treatment of Corn Processing Wastewater by Membrane Bioreactor

2012 ◽  
Vol 518-523 ◽  
pp. 2986-2990
Author(s):  
Jian Peng Pan ◽  
Min Sheng Huang ◽  
Yan He
Keyword(s):  
Experimental Study ◽  
Reverse Osmosis ◽  
Removal Efficiency ◽  
Water Reuse ◽  
Membrane Bioreactor ◽  
Single Stage ◽  
Corn Processing ◽  
Removal Efficiencies

The treatment of corn processing wastewater by membrane bioreactor was studied in this paper. The results showed that CODCr and NH3-N were eliminated efficiently by single-stage aeration MBR. The average concentrations of CODCr and NH3-N in the effluent were 53.1 and 1.29 mg/L, and the removal efficiency were 92.9% and 93.0Subscript text% respectively. But the removal efficiencies of TN and TP were limited, as 46.7% of TN and 41.6% of TP were removed. The subsequent processes (coagulation,reverse osmosis,etc.) may be needed to achieve the goal of water reuse.

scholarly journals Stuydy on sequencing batch moving bed membrane bioreactor technology (SBMBMBR) for the removal of organic and total nitrogen in tannery wastewater

2014 ◽  
Vol 17 (2) ◽  
pp. 69-79
Author(s):  
Linh Van Tran ◽  
Phuoc Van Nguyen ◽  
Phuong Thi Thanh Nguyen
Keyword(s):  
Removal Efficiency ◽  
Total Nitrogen ◽  
Nitrogen Removal ◽  
Membrane Bioreactor ◽  
Loading Rate ◽  
Nitrogen Loading ◽  
Cod Removal ◽  
Tannery Wastewater ◽  
Moving Bed ◽  
Cod Removal Efficiency

The SBMBMBR technology (sequencing batch moving bed membrane bioreactor), a combiantion of membrane filtration MF process in activated sludge with sequencing batch (SBR) moving bed using Anox Kaldnes K2 (MBBR), has been studied for the removal of organic and total nitrogen in tannery wastewater. After 170 days, reasearch results showed that the COD removal efficiency was ranged from 89,2±0,6 to 95,9±0,3% when the organic loading rate changed from 0,564±0,019 to 1.207±99 kgCOD/m3/day. The total nitrogen removal efficiency reached 30,0±4,9 to 65,9±13,3. The highest COD removal efficiency was 0,72±0,02 kgCOD/m3/day. The lowest nitrogen removal efficiency was 10,8±5,4% at 0,327±0,020 kgTN/m3/day of nitrogen loading rate. During the research, the adhensional tension of microorganism was insignificant. The biomass remained unchanged with 6.808±226 mg/L of Mixed liquor suspended solids (MLSS). When the salinity went up from 3.500 to 8.000 mgCl/l, the COD and nitrogen removal efficiency decreased. However, the conversion of nitrogen was improved and the recovery of biomass following the changed loading rate was quite fast.

Study on the Treatment of Tannery Wastewater with the High Concentration of Ammonia Nitrogen by MBR

2011 ◽  
Vol 71-78 ◽  
pp. 2186-2189 ◽  
Author(s):  
Jian Gen Wang ◽  
Ya Hui Liu
Keyword(s):  
Dissolved Oxygen ◽  
Removal Efficiency ◽  
Membrane Bioreactor ◽  
Removal Rate ◽  
Ammonia Nitrogen ◽  
Tannery Wastewater ◽  
Tannery Effluent ◽  
Treatment Efficiency ◽  
High Concentration ◽  
Membrane Flux

The removal efficiency of CODCr and ammonia nitrogen of the high concentration of ammonia nitrogen from tannery effluent by membrane bioreactor (MBR) was investigated. The results showed that when the operation of MBR is stable, influent CODCr loads are less than 4.8 kg/m3•d, the average removal rate of CODCr was over 88%, the removal rate of ammonia nitrogen reached to 90%; when dissolved oxygen (DO) was 1.2mg/L and 1.8 mg/L, the reactor still has excellent treatment efficiency, and the removal rate of CODCr and ammonia nitrogen can achieved over 90%. In addition, through the study of membrane flux, it is easy to find that membrane flux decreases rapidly, the membrane requires periodic cleansing.

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