Nitrogen removal and bacterial mechanism in a hybrid anoxic/oxic baffled reactor affected by shortening HRT in treating manure-free piggery wastewater

2021 ◽  
Vol 163 ◽  
pp. 105284
Author(s):  
Jianzheng Li ◽  
Kaiwen Deng ◽  
Jiuling Li ◽  
Min Liu ◽  
Jia Meng
Keyword(s):  
Nitrogen Removal ◽  
Piggery Wastewater

Experimental validation of a simulation and design model for nitrogen removal in sequencing batch reactors

1997 ◽  
Vol 35 (1) ◽  
pp. 113-120 ◽  
Author(s):  
G. Andreottola ◽  
G. Bortone ◽  
A. Tilche
Keyword(s):  
Nitrogen Removal ◽  
Phase Distribution ◽  
Nitrogen Concentration ◽  
Design Procedure ◽  
Aerobic Condition ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Daily Cycle ◽  
Piggery Wastewater ◽  
Biological Nitrogen

The development and the sensitivity analysis of a dynamic SBR simulation model for biological nitrogen removal, based on the Activated Sludge Model N. 1, are presented. An experimental study for the calibration and validation of the model was carried out using a bench scale SBR. Piggery wastewater was used as feed. The operating daily cycle of the SBR reactor included three sub-cycles of 7.5 hours each, each one alternating anoxic and aerobic condition, while settling phase was carried out at the end of the three sub-cycles. A first enhancement of model N. 1 was performed splitting nitrification into the two sub-processes of nitriation and nitratation. A second enhancement of the model was obtained with the introduction of a switch function of nitratation kinetics. An algorithm for optimization of the cycle length and phase distribution in order to minimize effluent nitrogen concentration was developed. A design procedure of SBR systems is also described.

Biological nitrogen removal using bio-sorbed internal organic carbon from piggery wastewater in a post-denitrification MLE process

2004 ◽  
Vol 49 (5-6) ◽  
pp. 373-386 ◽  
Author(s):  
S.-M. Park ◽  
H.-B. Jun ◽  
Y.-J. Chung ◽  
S.-H. Lee
Keyword(s):  
Organic Matter ◽  
Nitrogen Removal ◽  
Nitrate Reduction ◽  
Hydraulic Retention Time ◽  
Carbon Sources ◽  
Synthetic Wastewater ◽  
Biological Nitrogen Removal ◽  
Nitrification Rate ◽  
Piggery Wastewater ◽  
Biological Nitrogen

Nitrogen removal from a piggery wastewater was investigated in a post-denitrification modified Lüdzack Ettinger (PDMLE) process. Overall hydraulic retention time (HRT) of the PDMLE, consisting of contact/separator (C/S), nitrification, denitrification and re-aerobic bioreactor was 10 days. 60% of the influent SCOD was separated in the C/S by contacting the return sludge with the synthetic wastewater, however, only 10% of the influent SCOD was separated from the piggery wastewater. Biosorption capacities of the synthetic wastewater and piggery wastewater were 800 and 150 mg/g-MLSS, respectively. In spite of the high organic and nitrogen load, nitrification efficiency was above 95%, and nitrification rate was about 180 mg-NH4+-N/L·day. The removed ΔCOD/Δnitrate ratios in the denitrification tank were 4.0 and 11.5 g-SCOD/g-nitrate, while denitrification rates were 8.4 and 2.6 mg-nitrate/day for synthetic and piggery wastewater, respectively. In the proposed PDMLE process, both bio-sorbed and bypassed organic matter could be successfully used for nitrate reduction as carbon sources and the final TN removal efficiency was as high as 95%.

Simultaneous carbon and nitrogen removal from piggery wastewater using loop configuration microbial fuel cell

2013 ◽  
Vol 48 (7) ◽  
pp. 1080-1085 ◽  
Author(s):  
J.H. Ryu ◽  
H.L. Lee ◽  
Y.P. Lee ◽  
T.S. Kim ◽  
M.K. Kim ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Microbial Fuel Cell ◽  
Nitrogen Removal ◽  
Piggery Wastewater ◽  
Carbon And Nitrogen

scholarly journals Anaerobically fermented spent mushroom substrates improve nitrogen removal and lead (II) adsorption

2021 ◽  
Vol 83 (7) ◽  
pp. 1691-1702
Author(s):  
Yunlong Yang ◽  
Ling Li ◽  
Shuqian Sun ◽  
Ershu Lin ◽  
Jibo Xiao
Keyword(s):  
Nitrogen Removal ◽  
Room Temperature ◽  
Sequencing Batch Reactor ◽  
High Throughput Sequencing ◽  
Batch Reactor ◽  
Fixed Bed ◽  
Fixed Bed Reactor ◽  
Carboxyl Group ◽  
Thomas Model ◽  
Piggery Wastewater

Abstract In this study, spent mushroom substrates (SMSs) were fermented anaerobically at room temperature to gain liquid SMSs (LSMSs) that were used to remove nitrogen from the piggery wastewater with a low C/N ratio in a sequencing batch reactor (SBR) and solid SMSs (SSMSs) that were utilized to adsorb Pb2+ from Pb2+-containing wastewater in a fixed-bed reactor (FBR). After LSMSs supplement, the removal efficiency of both total nitrogen (TN) and NH+4-N increased from around 50% to 60–80%. High-throughput sequencing results presented an obvious change in microbial diversity, and some functional microorganisms like Zoogloea and Hydrogenophaga predominated to promote nitrogen removal. Pb2+ did not emerge from the effluent until 240 min with the corresponding concentration being less than 3 mg/L when using 30-day SSMSs as adsorbents, and it was demonstrated to be appropriate to use the Thomas model to predict Pb2+ sorption on SSMSs. Although various functional groups played a role in binding ions, the carboxyl group was proved to contribute most to Pb2+ adsorption. These results certified that the anaerobically fermented SMSs are decidedly suitable for wastewater treatment.

Nitrogen removal from low COD/TN ratio manure-free piggery wastewater within an upflow microaerobic sludge reactor

2015 ◽  
Vol 198 ◽  
pp. 884-890 ◽  
Author(s):  
Jia Meng ◽  
Jiuling Li ◽  
Jianzheng Li ◽  
Philip Antwi ◽  
Kaiwen Deng ◽  
...  
Keyword(s):  
Nitrogen Removal ◽  
Piggery Wastewater
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