The influence of operational conditions in sequencing batch reactors on removal of nitrogen and organics from municipal landfill leachate

2005 ◽  
Vol 23 (5) ◽  
pp. 429-438 ◽  
Author(s):  
Ewa Klimiuk ◽  
Dorota Kulikowska
Keyword(s):  
Landfill Leachate ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Operational Conditions ◽  
Municipal Landfill

scholarly journals Analysis of the Bioaugmentation Potential of Pseudomonas putida OR45a and Pseudomonas putida KB3 in the Sequencing Batch Reactors Fed with the Phenolic Landfill Leachate

Water ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 906
Author(s):  
Justyna Michalska ◽  
Artur Piński ◽  
Joanna Żur ◽  
Agnieszka Mrozik
Keyword(s):  
Pseudomonas Putida ◽  
Landfill Leachate ◽  
Oxygen Demand ◽  
Ammonia Nitrogen ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
High Toxicity ◽  
High Enzymatic Activity ◽  
Wastewater Treatment Systems ◽  
Nonspecific Esterases

The treatment of landfill leachate could be challenging for the biological wastewater treatment systems due to its high toxicity and the presence of poorly biodegradable contaminants. In this study, the bioaugmentation technology was successfully applied in sequencing batch reactors (SBRs) fed with the phenolic landfill leachate by inoculation of the activated sludge (AS) with two phenol-degrading Pseudomonas putida OR45a and Pseudomonas putida KB3 strains. According to the results, the SBRs bioaugmented with Pseudomonas strains withstood the increasing concentrations of the leachate. This resulted in the higher removal efficiency of the chemical oxygen demand (COD) of 79–86%, ammonia nitrogen of 87–88% and phenolic compounds of 85–96% as compared to 45%, 64%, and 50% for the noninoculated SBR. Simultaneously, the bioaugmentation of the AS allowed to maintain the high enzymatic activity of dehydrogenases, nonspecific esterases, and catalase in this ecosystem, which contributed to the higher functional capacity of indigenous microorganisms than in the noninoculated AS. Herein, the stress level experienced by the microorganisms in the SBRs fed with the leachate computed based on the cellular ATP measurements showed that the abundance of exogenous Pseudomonas strains in the bioreactors contributed to the reduction in effluent toxicity, which was reflected by a decrease in the stress biomass index to 32–45% as compared to the nonbioaugmented AS (76%).

Powdered ZELIAC augmented sequencing batch reactors (SBR) process for co-treatment of landfill leachate and domestic wastewater

2014 ◽  
Vol 139 ◽  
pp. 1-14 ◽  
Author(s):  
Amin Mojiri ◽  
Hamidi Abdul Aziz ◽  
Nastaein Q. Zaman ◽  
Shuokr Qarani Aziz ◽  
Mohammad Ali Zahed
Keyword(s):  
Landfill Leachate ◽  
Domestic Wastewater ◽  
Batch Reactors ◽  
Sequencing Batch Reactors

Co-treatment of landfill leachate in laboratory-scale sequencing batch reactors: analysis of system performance and biomass activity by means of respirometric techniques

2014 ◽  
Vol 69 (6) ◽  
pp. 1267-1274 ◽  
Author(s):  
M. Capodici ◽  
D. Di Trapani ◽  
G. Viviani
Keyword(s):  
Landfill Leachate ◽  
Oxygen Uptake Rate ◽  
Oxygen Demand ◽  
Domestic Wastewater ◽  
Ammonia Nitrogen ◽  
Synthetic Wastewater ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Population Average ◽  
Biomass Activity

Aged or mature leachate, produced by old landfills, can be very refractory; for this reason mature leachate is difficult to treat alone, but it can be co-treated with sewage or domestic wastewater. The aim of the study was to investigate the feasibility of leachate co-treatment with synthetic wastewater, in terms of process performance and biomass activity, by means of respirometric techniques. Two sequencing batch reactors (SBRs), named SBR1 and SBR2, were fed with synthetic wastewater and two different percentages of landfill leachate (respectively 10% and 50% v v−1 in SBR1 and SBR2). The results showed good chemical oxygen demand (COD) removal efficiency for both reactors, with average COD removals equal to 91.64 and 89.04% respectively for SBR1 and SBR2. Furthermore, both SBRs showed good ammonia-nitrogen (AN) removal efficiencies, higher than 60%, thus confirming the feasibility of leachate co-treatment with a readily biodegradable wastewater. Significant respiration rates were obtained for the heterotrophic population (average values of maximum oxygen uptake rate equal to 37.30 and 56.68 mg O2 L−1 h−1 respectively for SBR1 and SBR2), thus suggesting the feasibility of leachate co-treatment with synthetic wastewater.

scholarly journals Groundwater Nitrate Removal Performance of Selected Pseudomonas Strains Carrying nosZ Gene in Aerobic Granular Sequential Batch Reactors

Water ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1119
Author(s):  
Miguel Hurtado-Martinez ◽  
Barbara Muñoz-Palazon ◽  
Alejandro Gonzalez-Martinez ◽  
Maximino Manzanera ◽  
Jesus Gonzalez-Lopez
Keyword(s):  
Carbon Concentration ◽  
Nitrate Removal ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Granule Formation ◽  
Pseudomonas Denitrificans ◽  
Nosz Gene ◽  
Operational Conditions ◽  
Mean Size ◽  
Denitrifying Microorganisms

Four granular sequencing batch reactors (GSBRs) were inoculated with four denitrifying Pseudomonas strains carrying nosZ to study the process of granule formation, the operational conditions of the bioreactors, and the carbon concentration needed for nitrate removal. The selected Pseudomonas strains were P. stutzeri I1, P. fluorescens 376, P. denitrificans Z1, and P. fluorescens PSC26, previously reported as denitrifying microorganisms carrying the nosZ gene. Pseudomonas denitrificans Z1 produced fluffy, low-density granules, with a decantation speed below 10 m h−1. However, P. fluorescens PSC26, P. stutzeri I1, and P. fluorescens 376 formed stable granules, with mean size from 7 to 15 mm, related to the strain and carbon concentration. P. stutzeri I1 and P. fluorescens 376 removed nitrate efficiently with a ratio in the range of 96%, depending on the source and concentration of organic matter. Therefore, the findings suggest that the inoculation of GSBR systems with denitrifying strains of Pseudomonas spp. containing the nosZ gene enables the formation of stable granules, the efficient removal of nitrate, and the transformation of nitrate into nitrogen gas, a result of considerable environmental interest to avoid the generation of nitrous oxide.

Biological ammonia removal from anaerobically pre-treated landfill leachate in sequencing batch reactors (SBR)

2001 ◽  
Vol 43 (3) ◽  
pp. 307-314 ◽  
Author(s):  
G. Yalmaz ◽  
I. Öztürk
Keyword(s):  
Carbon Source ◽  
Landfill Leachate ◽  
Cycle Time ◽  
Biomass Concentration ◽  
Ammonia Removal ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
The Third ◽  
External Carbon Source ◽  
The Difference

The aim of the study was to investigate both the use of the SBR technology in biological ammonia removal from landfill leachate, and the suitability of raw landfill leachate as external carbon source in denitrification step. The SBR was fed with diluted leachate for the first 42 days and then the effluent of UASBR was used as the feed. The SBR was operated intermittently with a cycle time of 24 hours. The effluent NH4+-N values of less than 5 mg NH4+-N L-1 was consistently observed for the initial NH4+-N levels of as high as 1000 mg NH4+-N L-1. The nitrification rates for the first, second and third stages were found as 5.7, 46.8 and 102.8 mg NH4+-N L-1 h-1, respectively. The difference of the nitrification rates in the 2nd and 3rd stages originated from increasing adaptation of the sludge as well as increasing biomass concentration (10.5 mg NH4+-N g-1VSS h-1). No significant accumulation of NO2--N has been observed during the study and NO2--N/NOx--N ratios measured in the 1st aerobic phase and the SBR effluent were less than 7%. The denitrification rates for the second (raw leachate as carbon source) and the third (Ca(CH3COO)2 as carbon source) stages were determined as 45.7 mg NOx--N L-1 h-1 (or 9.85 mg NOx--N g-1VSS h-1) and 125.7 mg NOx--N L-1 h-1 (or 12.88 mg NOx--N g-1VSS h1), respectively.

Anaerobic treatability of leachate: a comparative evaluation for three different reactor systems

2000 ◽  
Vol 42 (1-2) ◽  
pp. 287-292 ◽  
Author(s):  
H. Timur ◽  
I. Ozturk ◽  
M. Altinbas ◽  
O. Arikan ◽  
B. S. Tuyluoglu
Keyword(s):  
Landfill Leachate ◽  
Experimental Studies ◽  
Operating Conditions ◽  
Batch Reactors ◽  
Sequencing Batch Reactors ◽  
Anaerobic Reactors ◽  
Substrate Removal ◽  
Mesophilic Conditions ◽  
Multicomponent Substrate ◽  
Steady State Performance

In this study landfill leachate from two young municipal landfill sites were treated in three bench-scale systems including anaerobic sequencing batch reactors (ASBR), anaerobic hybrid bed filter (AHBF) and upflow sludge blanket reactor (UASBR) at mesophilic conditions. The experimental studies have been conducted at variable influent leachate CODs of 1900–19000 mg.l–1 and hydraulic retention times (HRT) of 10 to 1.5 days and solid retention times (SRT) of 40 to 10 days in ASBRs. Influent leachate concentrations and HRT's of AHBF were varied in the range of 4000 to 15000 mg.l–1 and 5.1 to 0.9 days, respectively. Anaerobic treatability studies have been performed for about 20 months using 3.5 year old landfill leachate for ASBR and AHBF. The anaerobic treatability of the second leachate which was only two years old was investigated in the lab-scale UASBR for about 4 months. The influent CODs of the UASBR were varied from 9000 to 25000 mg.l–1. HRTs ranged from 1.7 to 2.35 days in the same period. COD removals were in the range of 92 to 94% at the related operating conditions. The steady-state performance data of anaerobic reactors fit quite well to the linearized second-order multicomponent substrate removal kinetic model with a correlation of more than 98%.

Biological treatment of a landfill leachate in sequencing batch reactors

1986 ◽  
Vol 5 (1) ◽  
pp. 41-50 ◽  
Author(s):  
Wei-Chi Ying ◽  
Robert R. Bonk ◽  
Vernon J. Lloyd ◽  
Stanley A. Sojka
Keyword(s):  
Landfill Leachate ◽  
Biological Treatment ◽  
Batch Reactors ◽  
Sequencing Batch Reactors
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