Two ways to achieve an anammox influent from real reject water treatment at lab-scale: Partial SBR nitrification and SHARON process

2007 ◽  
Vol 42 (4) ◽  
pp. 715-720 ◽  
Author(s):  
A. Galí ◽  
J. Dosta ◽  
M.C.M. van Loosdrecht ◽  
J. Mata-Alvarez
Keyword(s):  
Water Treatment ◽  
Reject Water ◽  
Sharon Process

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.

Direct and indirect effects of oxygen limitation on nitrification process applied to reject water treatment

2014 ◽  
Vol 56 (3) ◽  
pp. 598-607 ◽  
Author(s):  
Lukas Pacek ◽  
Pavel Svehla ◽  
Jan Bartacek ◽  
Josef Radechovsky ◽  
Helena Hrncirova ◽  
...  
Keyword(s):  
Water Treatment ◽  
Indirect Effects ◽  
Oxygen Limitation ◽  
Direct And Indirect Effects ◽  
Reject Water ◽  
Nitrification Process

Dynamics of nitric oxide and nitrous oxide emission during full-scale reject water treatment

2008 ◽  
Vol 42 (3) ◽  
pp. 812-826 ◽  
Author(s):  
Marlies J. Kampschreur ◽  
Wouter R.L. van der Star ◽  
Hubert A. Wielders ◽  
Jan Willem Mulder ◽  
Mike S.M. Jetten ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitrous Oxide ◽  
Water Treatment ◽  
Full Scale ◽  
Nitrous Oxide Emission ◽  
Reject Water

SIMULATION FOR OPERATION AND CONTROL OF REJECT WATER TREATMENT PROCESSES

2007 ◽  
Vol 2007 (14) ◽  
pp. 4357-4372 ◽  
Author(s):  
R. M. Jones ◽  
P.L. Dold ◽  
I. Takács ◽  
K. Chapman ◽  
B. Wett ◽  
...  
Keyword(s):  
Water Treatment ◽  
Reject Water ◽  
Treatment Processes ◽  
And Control

Startup and performance of a novel single-stage partial nitritation/anammox system for reject water treatment

2021 ◽  
Vol 321 ◽  
pp. 124432
Author(s):  
Yunzhi Qian ◽  
Yanmei Ding ◽  
Huaji Ma ◽  
Yongzhi Chi ◽  
Hongying Yuan ◽  
...  
Keyword(s):  
Water Treatment ◽  
Single Stage ◽  
Partial Nitritation ◽  
Reject Water ◽  
And Performance

scholarly journals A promising approach of reject water treatment using a tidal flow constructed wetland system employing alum sludge as main substrate

2011 ◽  
Vol 63 (10) ◽  
pp. 2367-2373 ◽  
Author(s):  
Y. Yang ◽  
Y. Q. Zhao ◽  
S. P. Wang ◽  
X. C. Guo ◽  
Y. X. Ren ◽  
...  
Keyword(s):  
Water Treatment ◽  
Constructed Wetland ◽  
Municipal Wastewater ◽  
Nutrient Loading ◽  
Tidal Flow ◽  
Treatment Plant ◽  
Oxygen Demand ◽  
Main Concern ◽  
Reject Water ◽  
Alum Sludge

This study examined a novel reuse of alum sludge, an inescapable by-product of drinking water treatment process when aluminium salt is added as a coagulant, as the main medium in a laboratory-scale multi-stage constructed wetland (CW) system for reject water treatment. Such reject water is a main concern in municipal wastewater treatment plant (MWWTP) for increasing the organic and nutrient loading. A ‘tidal flow’ strategy was employed to enhance the wetland aeration to stimulate organic matters (OM) and ammoniacal-nitrogen (N) oxidation while the ‘step feed’ operation was adopted to supply the necessary amount of carbon source for denitrification. The results reveal that alum sludge acting as P adsorbent can secure the P removal. Meanwhile, high removals of N and OM can also be obtained due to the active bacteria growth on the alum sludge surface. The results show that average removal efficiencies of 65.4 ± 12.3% for chemical oxygen demand (COD), 67.8 ± 9.2% for five-day biochemical oxygen demand (BOD5), 33.6 ± 17.0% for N and 99.5 ± 0.49% for P can be achieved over a period of 190 days. This indicates that novel reuse of alum sludge as medium in CW system can provide a promising approach for reject water treatment. Therefore, it will significantly reduce the amount of pollutant feedback through reject water recycling in a MWWTP.

scholarly journals Two strategies for phosphorus removal from reject water of municipal wastewater treatment plant using alum sludge

2009 ◽  
Vol 60 (12) ◽  
pp. 3181-3188 ◽  
Author(s):  
Y. Yang ◽  
Y. Q. Zhao ◽  
A. O. Babatunde ◽  
P. Kearney
Keyword(s):  
Wastewater Treatment ◽  
Water Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Organic Polymer ◽  
Municipal Wastewater Treatment ◽  
Municipal Wastewater Treatment Plant ◽  
Reject Water ◽  
Alum Sludge

In view of the well recognized need of reject water treatment in MWWTP (municipal wastewater treatment plant), this paper outlines two strategies for P removal from reject water using alum sludge, which is produced as by-product in drinking water treatment plant when aluminium sulphate is used for flocculating raw waters. One strategy is the use of the alum sludge in liquid form for co-conditioning and dewatering with the anaerobically digested activated sludge in MWWTP. The other strategy involves the use of the dewatered alum sludge cakes in a fixed bed for P immobilization from the reject water that refers to the mixture of the supernatant of the sludge thickening process and the supernatant of the anaerobically digested sludge. Experimental trials have demonstrated that the alum sludge can efficiently reduce P level in reject water. The co-conditioning strategy could reduce P from 597–675 mg P/L to 0.14–3.20 mg P/L in the supernatant of the sewage sludge while the organic polymer dosage for the conditioning of the mixed sludges would also be significantly reduced. The second strategy of reject water filtration with alum sludge bed has shown a good performance of P reduction. The alum sludge has P-adsorption capacity of 31 mg-P/g-sludge, which was tested under filtration velocity of 1.0 m/h. The two strategies highlight the beneficial utilization of alum sludge in wastewater treatment process in MWWTP, thus converting the alum sludge as a useful material, rather than a waste for landfill.

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