Total nitrogen removal from high-strength ammonia recycle stream using a single submerged attached growth bioreactor

Nitrifying community analysis in a single submerged attached-growth bioreactor for treatment of high-ammonia waste stream.

This study investigated the nitrifying community structure in a single-stage submerged attached-growth bioreactor (SAGB) that successfully achieved stable nitrogen removal over nitrite of a high-strength ammonia wastewater. The reactor was operated with intermittent aeration and external carbon addition (methanol). With influent ammonia and total Kjeldahl nitrogen ranging from 537 to 968 mg/L a...

Investigation of nitrification and nitrogen removal from centrate in a submerged attached-growth bioreactor.

The purpose of this study was to investigate the nitrification and nitrogen removal from centrate produced in the dewatering process of anaerobically digested sludge, using a single-unit, single-zone submerged attached-growth bioreactor. The nitrogen loading varied from 0.54 to 1.51 kg-N/m3 x d. Stable ammonia oxidation (nitritification) to nitrite was demonstrated. A nitritification efficiency...

Experimental and numerical results of a single submerged attached growth bioreactor (SAGB) for simultaneous oxidation of organics and nitrogen removal

Two primary advantages of a submerged attached growth bioreactor (SAGB) are the small volume requirement and the elimination of downstream clarification. While different configurations of SAGBs have been developed for various applications, the use of a single SAGB for achieving the combined removal of organics and nitrogen has not been extensively studied. This research studied the microbial ki...

Ammonia Nitrogen Removal by Single-stage Process: A Review

Single-stage nitrogen removal from ammonium-rich streams has been studied extensively during the last decade in view of rising cost of traditional treatment methods and stringent discharge standards. This system has been developed under different names (DEMON, CANON, OLAND, SNAP and SNAD) to carry out simultaneous aerobic, anaerobic ammonium oxidizing and denitrification reactions in the same r...

Removal of total ammonia nitrogen (TAN), nitrate and total organic carbon (TOC) from aquaculture wastewater using electrochemical technology: A review