Negligible seeding source effect on the final ANAMMOX community under steady and high nitrogen loading rate after enrichment using poly(vinyl alcohol) gel carriers

Chemosphere ◽  
2018 ◽  
Vol 208 ◽  
pp. 21-30 ◽  
Author(s):  
Kyungjin Cho ◽  
Minkyu Choi ◽  
Seockheon Lee ◽  
Hyokwan Bae
Keyword(s):  
Vinyl Alcohol ◽  
Loading Rate ◽  
Nitrogen Loading ◽  
Poly Vinyl Alcohol ◽  
High Nitrogen ◽  
Source Effect ◽  
High Nitrogen Loading

Nitrogen Removal Capacity of the River Network in a High Nitrogen Loading Region

2015 ◽  
Vol 49 (3) ◽  
pp. 1427-1435 ◽  
Author(s):  
Yongqiang Zhao ◽  
Yongqiu Xia ◽  
Chaopu Ti ◽  
Jun Shan ◽  
Bolun Li ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
River Network ◽  
Nitrogen Loading ◽  
High Nitrogen ◽  
Removal Capacity ◽  
High Nitrogen Loading

Does high nitrogen loading prevent clear-water conditions in shallow lakes at moderately high phosphorus concentrations?

2005 ◽  
Vol 50 (1) ◽  
pp. 27-41 ◽  
Author(s):  
Maria A. Gonzalez Sagrario ◽  
Erik Jeppesen ◽  
Joan Goma ◽  
Martin Sondergaard ◽  
Jens Peder Jensen ◽  
...  
Keyword(s):  
Shallow Lakes ◽  
Nitrogen Loading ◽  
Clear Water ◽  
High Nitrogen ◽  
High Phosphorus ◽  
Water Conditions ◽  
High Nitrogen Loading

Anammox process for nitrogen removal from anaerobically digested fish canning effluents

2006 ◽  
Vol 53 (12) ◽  
pp. 265-274 ◽  
Author(s):  
A. Dapena-Mora ◽  
J.L. Campos ◽  
A. Mosquera-Corral ◽  
R. Méndez
Keyword(s):  
Nitrogen Removal ◽  
Bacterial Population ◽  
Loading Rate ◽  
Population Distribution ◽  
Nitrogen Loading ◽  
Fish Analysis ◽  
Organic Carbon Content ◽  
High Nitrogen ◽  
N Concentration ◽  
Anammox Process

The Anammox process was used to treat the effluent generated in an anaerobic digester which treated the wastewater from a fish cannery once previously processed in a Sharon reactor. The effluents generated from the anaerobic digestion are characterised by their high ammonium content (700–1,000 g NH+4-N m−3), organic carbon content (1,000–1,300 g TOC m−3) and salinity up to 8,000–10,000 g NaCl m−3. In the Sharon reactor, approximately 50% of the NH+4-N was oxidised to NO−2-N via partial nitrification. The effluent of the Sharon step was fed to the Anammox reactor which treated an averaged nitrogen loading rate of 500 g N m−3· d−1. The system reached an averaged nitrogen removal efficiency of 68%, mainly limited due to the nonstoichiometric relation, for the Anammox process, between the ammonium and nitrite added in the feeding. The Anammox reactor bacterial population distribution, followed by FISH analysis and batch activity assays, did not change significantly despite the continuous entrance to the system of aerobic ammonium oxidisers coming from the Sharon reactor. Most of the bacteria corresponded to the Anammox population and the rest with slight variable shares to the ammonia oxidisers. The Anammox reactor showed an unexpected robustness despite the continuous variations in the influent composition regarding ammonium and nitrite concentrations. Only in the period when NO−2-N concentration was higher than the NH+4-N concentration did the process destabilise and it took 14 days until the nitrogen removal percentage decreased to 34% with concentrations in the effluent of 340 g NH+4-N m−3 and 440 g NO−2-N m−3, respectively. Based on these results, it seems that the Sharon–Anammox system can be applied for the treatment of industrial wastewaters with high nitrogen load and salt concentration with an appropriate control of the NO−2-N/NH+4-N ratio.

Mechanisms of Nitrogen Removal in Forage Rice Field Applied with Liquid Cattle Waste at High Nitrogen Loading

2012 ◽  
Vol 38 (5) ◽  
pp. 290-298 ◽  
Author(s):  
Shohei Riya ◽  
Sheng Zhou ◽  
Masaki Sagehashi ◽  
Akihiko Terada ◽  
Masaaki Hosomi
Keyword(s):  
Nitrogen Removal ◽  
Rice Field ◽  
Nitrogen Loading ◽  
High Nitrogen ◽  
Forage Rice ◽  
High Nitrogen Loading

Dye decolorisation by laccase immobilised in lens-shaped poly(vinyl alcohol) hydrogel capsules

2014 ◽  
Vol 68 (11) ◽  
Author(s):  
Radek Stloukal ◽  
Jarmila Watzková ◽  
Barbora Gregušová
Keyword(s):  
Vinyl Alcohol ◽  
Loading Rate ◽  
Poly Vinyl Alcohol ◽  
Volume Loading ◽  
Initial Amount ◽  
Original Activity ◽  
Batch Tests ◽  
Repeated Batch ◽  
Dye Decolorisation ◽  
Hydrogel Capsules

AbstractIn this study, laccase (from Trametes versicolor, 8.3 U mgenz−1) was used for the decolorisation of Saturn Blue L4G (10 mg L−1). The efficiency of the decolorisation (ratio between the amount of decolorised dye and initial amount of dye) by a free enzyme was 48 % and the decolorisation rate was determined at 2.11 × 10−3 mgdye mgenz−1 min−1. After immobilisation in lens-shaped poly(vinyl alcohol) hydrogel capsules LentiKats® Biocatalyst (LB) (concentration of immobilised enzyme: 4 mg per g of particles; volume-loading rate of LB: 10 g per 100 mL of medium), the enzyme retained 16.1 % of its original activity (1.34 U mgenz−1). Immobilised laccase was used for the dye decolorisation in 130 repeated batch tests with 71 % efficiency (LB activity: 7 × 10−3 mgdye min−1 gLB−1). In continuous mode (after 716.5 h), the efficiency of the dye decolorisation was 48 % (LB activity: 3.3 × 10−4 mgdye min/−1 gLB−1).

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