nitrification Articles

484 Results found
  • Keyword: nitrification ×

A pilot study on suspended activated sludge process augmented with immobilized biomass for simultaneous nitrification and denitrification

by IWA Publishing  (Jun. 26, 2015)

Concurrent nitrification and denitrification (CND) are natural phenomena in the soil environment that can be applied in wastewater treatment for enhanced total nitrogen removal. However, significant renovation is necessary for existing plants to equip them for nutrient removal. At a domestic wastewater treatment plant, we performed a pilot test ...

The effects of salinity on coupled nitrification and aerobic denitrification in an estuarine system

by IWA Publishing  (Jun. 3, 2015)

Salinity has significant effects on nitrification and denitrification processes, particularly in estuarine systems. A dissolved oxygen-enriched river and its estuary in northern China were selected to investigate the impact of salinity gradients (0.6, 4, 7.6, 11.4 and 14.7‰) obtained from the mixing of river samples and estuarine samples ...

Nitrification case study

by Cleveland Biotech Ltd.  (May 29, 2014)

The Bay View effluent treatment plant is one of the largest wastewater treatment facilities in North West Ohio, USA. The facility is located near the mouth of the Maumee River and provides treatment for an area of about 100 square miles. About 84 square miles of this area is located within Toledo city. The population that it serves is ...

Retro-Fit - Conversion of a Failed Media Filter to a Suspended Growth Aeration System case study

by Sani Tech Communal Systems Inc  (Jun. 6, 2015)

This particular project involved the conversion of a failed media filter to a suspended growth aeration system. The project was managed by Mr. Hal Lewis, P. Eng. of Stantec Consulting Limited. Sani Tech Communal Systems was awarded the contract to design and construct the repair. Sani Tech retained the services of Mr. Robin Smith, P. Eng., of ...

Respirometry study of two different wastewater samples on COD fractioning & biodegradability for a specific activated sludge process and nitrification case study

by SURCIS, S.L.  (Nov. 19, 2014)

Preliminary This service was made according to customer order points and indications from Hydrolab Microbiológica (Surcis collaborator) The client wanted Surcis to carry out a study about COD fractioning and nitrification. For this study the client has provided to Surcis the following: Process type: Activated sludge - Extended aeration ...

BM respirometry study about nitrification inhibition and actual aeration capacity in an activated sludge process case study

by SURCIS, S.L.  (Nov. 19, 2014)

Study for municipal WWTP in Spain This study is ordered to SURCIS as a consequence of the low process performance, practical absence of nitrification treatment. By other side, the mixed-liquor presented some abnormal features such as weakness, dark colour and abundant white foaming. Data for study interest Aeration system: fine ...

Bacterial community involved in the nitrogen cycle in a down-flow sponge-based trickling filter treating UASB effluent

by IWA Publishing  (Jun. 29, 2015)

The bacterial community composition of a down-flow sponge-based trickling filter treating upflow anaerobic sludge blanket (UASB) effluent was investigated by pyrosequencing. Bacterial community composition considerably changed along the reactor and over the operational period. The dominant phyla detected were Proteobacteria, Verrucomicrobia, and ...

Nitrogen balance and transformation in the nitrification process of coking wastewater and the influence on nitrification kinetics

by IWA Publishing  (Apr. 10, 2014)

This paper describes the total nitrogen balance, and the direction and degree of nitrogen transformation during the nitrification process of coking wastewater. According to the actual nitrification process, the conventional nitrification kinetic equation was amended. After 48 h of nitrification, the total nitrogen content remained almost the ...

Evaluation of the simultaneous biogas upgrading and treatment of centrates in a high-rate algal pond through C, N and P mass balances

by IWA Publishing  (Jun. 29, 2015)

The simultaneous capture of CO2 from biogas and removal of carbon and nutrients from diluted centrates in a 180 L high-rate algal pond (HRAP) interconnected to a 2.5 L absorption column were evaluated using a C, N and P mass balance approach. The experimental set-up was operated indoors at 75 μE/m2·s for 24 h/d at 20 days of ...

Simultaneous autotrophic denitrification and nitrification in a low-oxygen reaction environment

by IWA Publishing  (Aug. 13, 2014)

The occurrence of autotrophic denitrification and nitrification activities by ammonia-oxidising bacteria and nitrite-oxidising bacteria is studied in a bioreactor system operable at low-dissolved oxygen (DO) and at variable oxygen influx rates. At a loading of 3.6 mg NH4+–N/h into the bioreactor, simultaneous autotrophic ...

Need help finding the right suppliers?

Let the XPRTs do the work for you