Phosphorus recovery from municipal wastewater via a two-step process of ozonation and crystallization: process development, optimization and upscaling

2020 ◽  
Vol 6 (3) ◽  
pp. 817-828
Author(s):  
Liubov Vasenko ◽  
Adeline Bonnemain-Fernandes ◽  
Chandrakant Malwade ◽  
Haiyan Qu
Keyword(s):  
Municipal Wastewater ◽  
Crystallization Process ◽  
Process Development ◽  
Phosphorus Recovery ◽  
Step Process ◽  
Reject Water

Ozonation of NOM/HS in reject water results in higher purity of the recovered products during CaP crystallization.

scholarly journals Úsporné odstraňování dusíku procesem anammox z kalových a splaškových odpadních vod

Entecho ◽  
2019 ◽  
Vol 2 (1) ◽  
pp. 1-5
Author(s):  
Vojtěch Kouba ◽  
Jan Bartáček
Keyword(s):  
Nitrogen Removal ◽  
Low Temperatures ◽  
Municipal Wastewater ◽  
Pilot Scale ◽  
Main Stream ◽  
Excess Sludge ◽  
Partial Nitritation ◽  
Loading Rates ◽  
Reject Water ◽  
Nitrite Oxidizing Bacteria

Proces částečná nitritace-anammox odstraňuje amoniakální dusík z odpadních vod s polovičními náklady na aeraci, až o 80 % nižší produkcí přebytečného kalu a bez spotřeby organického substrátu. Jde o zavedený proces pro odstraňování dusíku z kalových vod z anaerobní fermentace, a podobně koncentrovaných a teplých odpadních vod. Na tyto vody se částečná nitritace-anammox aplikuje již déle než deset let, a to např. pod názvy ANAMMOX®, ANITA™ Mox, DEMON®, nebo TERRAMOX®. Optimalizované provozy těchto technologií dusík běžně odstraňují při zatížení 0,5–2,3 kg∙m–3∙d–1 (30–35 °C). Současnou výzvou pro výzkum je implementace částečné nitritace-anammox do hlavního proudu studené splaškové odpadní vody, přičemž konkrétními problémy jsou (i) potlačení nežádoucích nitratačních mikroorganismů (NOB) a (ii) adaptace mikroorganismů anammox na nízké teploty. Náš výzkum jsme začali s jednostupňovým procesem, a poté nitritaci a anammox rozdělili do dvou reaktorů. Prezentujeme strategii, která v laboratorním měřítku NOB účinně potlačila i při 12 °C a dále i v pilotním měřítku při 13–30 °C. Dále ukazujeme, že anammox je možné na nízké teploty adaptovat studenými šoky. Tyto výsledky umožní rozšířit úsporné odstraňování dusíku i do hlavního proudu splaškové odpadní vody na ČOV. English: Partial nitritation-anammox (PN/A) process removes nitrogen from wastewater with 50% reduction of aeration costs, 80% less excess sludge and no consumption of organic carbon. PN/A is an established process for the removal of nitrogen from reject water from anaerobic digestion and other similarly warm and concentrated streams. On such wastewater, PN/A has been applied in full scale for over 10 years under names such as ANAMMOX®, ANITA™ Mox, DEMON® or TERRAMOX®, whose optimized installations consistently achieve nitrogen removal loading rates of 0,5–2,3 kg∙m–3∙d–1. The current challenge for research is to implement PN/A into the main stream of cold municipal wastewater, the specific challenges being (i) suppression of undesirable nitrite oxidizing bacteria (NOB) and (ii) adaptation of anammox microorganisms to low temperatures. Our initial experiences with one-stage PN/A in the main stream led us to the separation of PN/A in two subsequent reactors. Subsequently, we developed a strategy for NOB suppression in partial nitritation even under 12 °C, which we then successfully tested in the pilot scale. Furthermore, we found that anammox can be adapted to low temperatures using cold shocks. In sum, these results will enable extending the savings for nitrogen removal into the main stream of wastewater at WWTP.

scholarly journals Hybrid membrane bioreactor for water recycling and phosphorus recovery

2006 ◽  
Vol 53 (7) ◽  
pp. 17-24 ◽  
Author(s):  
Y. Watanabe ◽  
K. Kimura
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Municipal Wastewater ◽  
Community Analysis ◽  
Hybrid Membrane ◽  
Phosphorus Recovery ◽  
Microbial Community Analysis ◽  
Low Viscosity ◽  
Ph Range ◽  
Phosphoric Acids

This paper deals with the performance of hybrid membrane bioreactor (MBR) combining the precoagulation/sedimentation and membrane bioreactor. The hybrid MBR not only produces the treated water with excellent permeate quality but also shows much lower membrane fouling than the conventional MBR. It may come from its extremely low F/M ratio to maintain the low viscosity even in the high MLSS concentration range of about 20,000 mg/L. Some results of microbial community analysis in MBRs was conducted to demonstrate the other reason for its lower membrane fouling. Hybrid MBR has a high potential to be used for the recycling use of the municipal wastewater. Coagulated sludge produced in the hybrid MBR is a promising phosphorus resource. This paper also contains a recent progress of phosphorus recovery technology, which uses a new phosphoric acids absorbent, i.e. the hexagonal mesostructured zirconium sulfate (ZS). The ZS has the extremely high adsorption capacity of phosphoric acids through anion exchange. The adsorbed phosphoric acids are released from the ZS in a high pH range of about 13.

Wastewater treatment using membranes: the North American experience

2000 ◽  
Vol 41 (10-11) ◽  
pp. 209-215 ◽  
Author(s):  
P. Côté ◽  
D. Thompson
Keyword(s):  
Wastewater Treatment ◽  
Municipal Wastewater ◽  
Process Development ◽  
Membrane Separation ◽  
Municipal Wastewater Treatment ◽  
Commercial Development ◽  
American Experience ◽  
The North ◽  
Small Flow ◽  
Development Applications

Key features of the process consisting in coupling biological treatment with membrane separation are described for wastewater treatment. The process development started in the early 1970s with small flow rate applications for on-site commercial development applications and industrial wastewater treatment. The introduction of immersed membrane in the early 1990s allowed the process to be used for municipal wastewater treatment. The results from the 1st year of operation of a 3,800 m3/d plant are presented.

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.

scholarly journals Environmental impacts of phosphorus recovery from municipal wastewater

2018 ◽  
Vol 130 ◽  
pp. 127-139 ◽  
Author(s):  
A. Amann ◽  
O. Zoboli ◽  
J. Krampe ◽  
H. Rechberger ◽  
M. Zessner ◽  
...  
Keyword(s):  
Environmental Impacts ◽  
Municipal Wastewater ◽  
Phosphorus Recovery
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