Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment

Intensive aquaculture usually produces large volumes of nutrient-rich wastewater, which is essential to treat to avoid eutrophication. This study aimed to evaluate the performance of five continuously aerated biofilm reactors treating simulated high-strength aquaculture wastewater under different di...

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Autores principales:	Shiyang Zhang, Jing Chen, Julin Yuan, Guangjun Wang
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	aquaculture wastewater biofilm reactor continuous aeration dissolved oxygen percent removal simultaneous nitrification-denitrification Environmental technology. Sanitary engineering TD1-1066
Acceso en línea:	https://doaj.org/article/b43681297fe94d39813c0462493bd849
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spelling	oai:doaj.org-article:b43681297fe94d39813c0462493bd8492021-11-05T21:16:34ZResponse of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment1751-231X10.2166/wpt.2021.062https://doaj.org/article/b43681297fe94d39813c0462493bd8492021-10-01T00:00:00Zhttp://wpt.iwaponline.com/content/16/4/1067https://doaj.org/toc/1751-231XIntensive aquaculture usually produces large volumes of nutrient-rich wastewater, which is essential to treat to avoid eutrophication. This study aimed to evaluate the performance of five continuously aerated biofilm reactors treating simulated high-strength aquaculture wastewater under different dissolved oxygen (DO) levels, and the effects of DO increments on simultaneous nitrification-denitrification (SND). Continuous aeration was beneficial to complete nitrification. Total inorganic nitrogen (TIN), principally ammonium, was mainly removed by SND. The SND rate response to different DO levels was fitted well by the power function of y = 54.81 + 371.58/(1 − 0.16*x)^(−1/0.24) (R2 = 0.897, P = 0.000). When the TIN was removed completely, the optimal SND rate was defined and corresponded to a value of 121.8%. Accordingly, the optimal DO concentration was calculated as 2.10 mg/L, close to the actual level of 1.83 mg/L, at which the highest proportional removals of total nitrogen (58.0%) and TIN (57.3%) were obtained. Phosphorus was also removed by denitrifying polyphosphate-accumulating organisms. HIGHLIGHTS Dissolved ammonium was mainly removed by simultaneous nitrification-denitrification (SND) process.; The optimal SND rate for the current wastewater was 121.8%.; The optimal DO corresponding to the best SND rate was 2.10 mg/L.; Phosphorus was mainly removed by denitrifying phosphate-accumulating organisms (PAOs).;Shiyang ZhangJing ChenJulin YuanGuangjun WangIWA Publishingarticleaquaculture wastewaterbiofilm reactorcontinuous aerationdissolved oxygenpercent removalsimultaneous nitrification-denitrificationEnvironmental technology. Sanitary engineeringTD1-1066ENWater Practice and Technology, Vol 16, Iss 4, Pp 1067-1077 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	aquaculture wastewater biofilm reactor continuous aeration dissolved oxygen percent removal simultaneous nitrification-denitrification Environmental technology. Sanitary engineering TD1-1066
spellingShingle	aquaculture wastewater biofilm reactor continuous aeration dissolved oxygen percent removal simultaneous nitrification-denitrification Environmental technology. Sanitary engineering TD1-1066 Shiyang Zhang Jing Chen Julin Yuan Guangjun Wang Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment
description	Intensive aquaculture usually produces large volumes of nutrient-rich wastewater, which is essential to treat to avoid eutrophication. This study aimed to evaluate the performance of five continuously aerated biofilm reactors treating simulated high-strength aquaculture wastewater under different dissolved oxygen (DO) levels, and the effects of DO increments on simultaneous nitrification-denitrification (SND). Continuous aeration was beneficial to complete nitrification. Total inorganic nitrogen (TIN), principally ammonium, was mainly removed by SND. The SND rate response to different DO levels was fitted well by the power function of y = 54.81 + 371.58/(1 − 0.16*x)^(−1/0.24) (R2 = 0.897, P = 0.000). When the TIN was removed completely, the optimal SND rate was defined and corresponded to a value of 121.8%. Accordingly, the optimal DO concentration was calculated as 2.10 mg/L, close to the actual level of 1.83 mg/L, at which the highest proportional removals of total nitrogen (58.0%) and TIN (57.3%) were obtained. Phosphorus was also removed by denitrifying polyphosphate-accumulating organisms. HIGHLIGHTS Dissolved ammonium was mainly removed by simultaneous nitrification-denitrification (SND) process.; The optimal SND rate for the current wastewater was 121.8%.; The optimal DO corresponding to the best SND rate was 2.10 mg/L.; Phosphorus was mainly removed by denitrifying phosphate-accumulating organisms (PAOs).;
format	article
author	Shiyang Zhang Jing Chen Julin Yuan Guangjun Wang
author_facet	Shiyang Zhang Jing Chen Julin Yuan Guangjun Wang
author_sort	Shiyang Zhang
title	Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment
title_short	Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment
title_full	Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment
title_fullStr	Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment
title_full_unstemmed	Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment
title_sort	response of simultaneous nitrification-denitrification to do increments in continuously aerated biofilm reactors for aquaculture wastewater treatment
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/b43681297fe94d39813c0462493bd849
work_keys_str_mv	AT shiyangzhang responseofsimultaneousnitrificationdenitrificationtodoincrementsincontinuouslyaeratedbiofilmreactorsforaquaculturewastewatertreatment AT jingchen responseofsimultaneousnitrificationdenitrificationtodoincrementsincontinuouslyaeratedbiofilmreactorsforaquaculturewastewatertreatment AT julinyuan responseofsimultaneousnitrificationdenitrificationtodoincrementsincontinuouslyaeratedbiofilmreactorsforaquaculturewastewatertreatment AT guangjunwang responseofsimultaneousnitrificationdenitrificationtodoincrementsincontinuouslyaeratedbiofilmreactorsforaquaculturewastewatertreatment
_version_	1718444003066642432

Response of simultaneous nitrification-denitrification to DO increments in continuously aerated biofilm reactors for aquaculture wastewater treatment

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