scholarly journals Enhanced ammonium removal and recovery from municipal wastewater by asymmetric CDI cell equipped with oxygen functionalized carbon electrode

2021 ◽  
Vol 274 ◽  
pp. 119064
Author(s):  
Olga Pastushok ◽  
Deepika L. Ramasamy ◽  
Mika Sillanpää ◽  
Eveliina Repo
Keyword(s):  
Municipal Wastewater ◽  
Carbon Electrode ◽  
Ammonium Removal ◽  
Removal And Recovery

Influence of pyrolysis temperature on production of digested sludge biochar and its application for ammonium removal from municipal wastewater

2019 ◽  
Vol 209 ◽  
pp. 927-936 ◽  
Author(s):  
Yao Tang ◽  
Md Samrat Alam ◽  
Kurt O. Konhauser ◽  
Daniel S. Alessi ◽  
Shengnan Xu ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Pyrolysis Temperature ◽  
Digested Sludge ◽  
Ammonium Removal

scholarly journals Effect of Intermittent Aeration in a Hybrid Vertical Anaerobic Biofilm Reactor (HyVAB) for Reject Water Treatment

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1151
Author(s):  
Vasan Sivalingam ◽  
Carlos Dinamarca ◽  
Eshetu Janka ◽  
Sergey Kukankov ◽  
Shuai Wang ◽  
...  
Keyword(s):  
Water Treatment ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Biofilm Reactor ◽  
Anaerobic Sludge ◽  
Main Process ◽  
Intermittent Aeration ◽  
High Concentration ◽  
Ammonium Removal ◽  
Reject Water

Water from anaerobic sludge dewatering (reject water that is recycled to the inlet main process treatment) from the Knarrdalstrand municipal wastewater treatment plant in Porsgrunn, Norway, contains 2.4 g/L of total chemical oxygen demand (TCOD) and 550 mg/L NH4-N (annual average). The high concentration of ammonium causes disturbances in the mainstream physical and chemical processes, while only a small fraction of the organics is biodegradable. A pilot-scale hybrid vertical anaerobic biofilm (HyVAB) reactor combining anaerobic and aerobic treatment was tested for reject water treatment to reduce process disturbances. The pilot HyVAB was prepared for the study with continuous aeration of the aerobic part of the reactor for 200 days, while two intermittent aeration schemes were applied during the three-month test period. Ammonium removal efficiency increased from 8% during the continuous aeration period to 50% at the end of the test when a short (7 min) aeration cycle was applied. COD removal was close to 20%, which was mainly obtained in the anaerobic stage and not significantly influenced by the aerations schemes. Simultaneous partial nitrification and denitrification were established in the biofilm that alternated between aerobic and anoxic conditions. The observed high ammonium removal is explained by two alternative shortcut processes via nitrite. The lack of biodegradable organics in the aerated stage suggests that most of the nitrogen removal was via the anammox pathway (autotrophic denitrification). The HyVAB, combining an anaerobic sludge bed and an intermittently aerated biofilm, appears to be an efficient process to treat high ammonium containing reject water.

Ammonium removal and recovery from real digestate wastewater by a modified operational method of membrane capacitive deionization unit

2019 ◽  
Vol 215 ◽  
pp. 1415-1423 ◽  
Author(s):  
Hacer Sakar ◽  
Isıl Celik ◽  
Cigdem Balcik-Canbolat ◽  
Bulent Keskinler ◽  
Ahmet Karagunduz
Keyword(s):  
Capacitive Deionization ◽  
Operational Method ◽  
Ammonium Removal ◽  
Removal And Recovery

Ammonium removal and recovery from sewage water using column-system packed highly selective ammonium adsorbent

2021 ◽  
pp. 117495
Author(s):  
Hisashi Tanaka ◽  
Masayuki Fujimoto ◽  
Kimitaka Minami ◽  
Akira Takahashi ◽  
Durga Parajuli ◽  
...  
Keyword(s):  
Sewage Water ◽  
Ammonium Removal ◽  
Column System ◽  
Removal And Recovery

scholarly journals Applicability of zirconium loaded okara in the removal and recovery of phosphorus from municipal wastewater

2019 ◽  
Vol 266 ◽  
pp. 012004 ◽  
Author(s):  
T A H Nguyen ◽  
H H Ngo ◽  
W S Guo ◽  
T Q Pham ◽  
T H Cao ◽  
...  
Keyword(s):  
Municipal Wastewater ◽  
Removal And Recovery

Ammonium removal from waste solutions by precipitation of MgNH4PO4 II. Ammonium removal and recovery with recycling of regenerate

1992 ◽  
Vol 6 (4) ◽  
pp. 339-345 ◽  
Author(s):  
Tadeusz Stefanowicz ◽  
Stefania Napieralska-Zagozda ◽  
Małgorzata Osińska ◽  
Katarzyna Samsonowska
Keyword(s):  
Ammonium Removal ◽  
Removal And Recovery

scholarly journals Laboratory-scale investigation on the role of microalgae towards a sustainable treatment of real municipal wastewater

2018 ◽  
Vol 78 (8) ◽  
pp. 1726-1732 ◽  
Author(s):  
S. Petrini ◽  
P. Foladori ◽  
G. Andreottola
Keyword(s):  
Activated Sludge ◽  
Municipal Wastewater ◽  
Removal Rate ◽  
Batch Reactor ◽  
Low Cost ◽  
Oxygen Demand ◽  
Cost Effective ◽  
P Uptake ◽  
Ammonium Removal ◽  
N Assimilation

Abstract Engineered microalgal-bacteria consortia are an attractive solution towards a low-cost and sustainable wastewater treatment that does not rely on artificial mechanical aeration. In the research conducted for this study, a bench-scale photo-sequencing-batch reactor (PSBR) was operated without external aeration. A spontaneous consortium of microalgae and bacteria was developed in the PSBR at a concentration of 0.8–1.7 g TSS/L. The PSBR ensured removal efficiency of 85 ± 8% for chemical oxygen demand (COD) and 98 ± 2% for total Kjeldahl nitrogen (TKN). Nitrogen balance revealed that the main mechanisms for TKN removal was autotrophic nitrification, while N assimilation and denitrification accounted for 4% and 56%, respectively. The development of dense microalgae–bacteria bioflocs resulted in good settleability with average effluent concentration of 16 mgTSS/L. The ammonium removal rate was 2.9 mgN L−1 h−1, which corresponded to 2.4 mgN gTSS−1 h−1. Although this specific ammonium removal rate is similar to activated sludge, the volumetric rate is lower due to the limited total suspended solids (TSS) concentration (three times less than activated sludge). Therefore, the PSBR footprint appears less competitive than activated sludge. However, ammonium was completely removed without artificial aeration, resulting in a very cost-effective process. Only 50% of phosphorus was removed, suggesting that further research on P uptake is needed.

scholarly journals Application of Natural Clinoptilolite for Ammonium Removal from Sludge Water

Molecules ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 114
Author(s):  
Stephan Wasielewski ◽  
Eduard Rott ◽  
Ralf Minke ◽  
Heidrun Steinmetz
Keyword(s):  
Industrial Wastewater ◽  
Municipal Wastewater ◽  
Wastewater Treatment Plants ◽  
Substrate Inhibition ◽  
High Stress ◽  
Kinetic Studies ◽  
Digested Sludge ◽  
Ammonium Removal ◽  
Higher Temperature ◽  
Natural Clinoptilolite

Sludge water (SW) arising from the dewatering of anaerobic digested sludge causes high back loads of ammonium, leading to high stress (inhibition of the activity of microorganisms by an oversupply of nitrogen compounds (substrate inhibition)) for wastewater treatment plants (WWTP). On the other hand, ammonium is a valuable resource to substitute ammonia from the energy intensive Haber-Bosch process for fertilizer production. Within this work, it was investigated to what extent and under which conditions Carpathian clinoptilolite powder (CCP 20) can be used to remove ammonium from SW and to recover it. Two different SW, originating from municipal WWTPs were investigated (SW1: c0 = 967 mg/L NH4-N, municipal wastewater; SW2: c0 = 718–927 mg/L NH4-N, large industrial wastewater share). The highest loading was achieved at 307 K with 16.1 mg/g (SW1) and 15.3 mg/g (SW2) at 295 K. Kinetic studies with different specific dosages (0.05 gCLI/mgNH4-N), temperatures (283–307 K) and pre-loaded CCP 20 (0–11.4 mg/g) were conducted. At a higher temperature a higher load was achieved. Already after 30 min contact time, regardless of the sludge water, a high load up to 7.15 mg/g at 307 K was reached, achieving equilibrium after 120 min. Pre-loaded sorbent could be further loaded with ammonium when it was recontacted with the SW.

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