Aerobic granulation in a sequencing batch airlift reactor

Abstract In a sequencing batch reactor (SBR) granules of aerobic heterotrophic microorganisms were cultured. The effect of different operational conditions on the formation of these aerobic granules were studied. The time allowed for settling was the main parameter to select for growth of bacteria in well settling granules.

Aerobic activated sludge granules are dense, spherical biofilms which can strongly improve purification efficiency and sludge settling in wastewater treatment processes. In this study, the structure and development of different granule types were analyzed. Biofilm samples originated from lab-scale sequencing batch reactors which were operated with malthouse, brewery, and artificial wastewater

A pilot-scale sequencing batch reactor (SBR) treating 120 m 3 /d of a town's wastewater was set up in and aerobic granules with a mean diameter of 0.28 mm, mixed liquor suspended solids (MLSS) of 7,500 mg/L and sludge volume index (SVI) 30 of 43 mL/g were achieved. A full-scale SBR with 50,000 m 3/ d for treating a town's wastewater was operated in and aerobic granules with a mean

In a sequencing batch reactor (SBR) with 2.5h operation cycle, aerobic granular sludge (AGS) was developed successfully. The main diameter and sludge volume index (SVI) of AGS cultivated were 1~3 mm and 33 ml g^-1. There were significant effects of pH value on aerobic granulation. The dosage of 300 mgNaHCO₃ l^-1Learn More

Sequencing batch airlift reactor (SBAR) was developed to selectively enrich and granulate ammonia oxidizers from wastewater nitrification. Partial nitrification and reduced settling time were the selection pressures for the selective enrichment and granulation of ammonia oxidizers in the SBAR operation. Sludge flocs became granulated and the sludge volume index (SVI) decreased sharply from 130

Mature aerobic granular sludge (AGS) was inoculated for the start-up of a pilot-scale sequencing batch reactor for the treatment of high concentration solvent recovery raffinate (SRR). The proportion of simulated wastewater (SW) (w/w) in the influent gradually decreased to zero during the operation, while volume of SRR gradually increased from zero to 10.84 L. AGS was successfully domesticated

To understand the effect of low temperature on the formation of aerobic granules and their nutrient removal characteristics, an aerobic granular sequencing batch airlift reactor (SBAR) has been operated at 10 degrees C using a mixed carbon source of glucose and sodium acetate. The results showed that aerobic granules were obtained and that the reactor performed in stable manner under the

The airlift reactor was inoculated with 1 L of granular biomass from a granular sequencing batch reactor (GSBR) at pilot scale treating low-strength wastewater for simultaneous carbon, nitrogen, phosphorus removal (Isanta et al., ). Then, the reactor was operated in continuous using a synthetic high-strength ammonium

Limited work has been done on the accumulation characterization of Ca2+ in aerobic granules that are cultivated in a continuous-flow bioreactor. In this work, the contribution of Ca2+ to the biogranulation in a continuous flow airlift fluidized bed (CAFB) reactor has been studied. The spatial distribution and form of calcium in the granules were investigated by scanning electron microscopy

The previous research on aerobic granulation was mainly focused on the factors affecting aerobic granulation. However, little has been know about the metabolic behaviors and modeling of aerobic granular sludge process. In this study, a one-dimensional model was developed and successfully applied to aerobic granular sludge SBR. The diffusion

Influence of the granulation grade on the concentration of suspended solids in the effluent of a pilot scale sequencing batch reactor operated with aerobic granular sludge. Separation and Purification Technology, 142, 234-241.

Sequencing batch reactors (SBRs), also known as sequential batch reactors, are activated sludge systems applied in wastewater treatment. SBR systems are upgrades of conventional activated sludge systems that minimize footprint by integrating separate functions in a single treatment system. Standard SBR setups usually include the reactor basin, water sludge draw-off mechanism, effluent decanter

Goal The goal of the project was to produce biomolecular fingerprints in order to describe the structure of microbial community which develops during aerobic sludge granulation, initiated in sequencing batch wastewater treatment processes. Four SBR were run under different conditions of cultivation. Pulse and anaerobic feeding modes were applied, as well as mesophilic (20-30 ° C) and

So far, most research on aerobic granulation has been conducted in sequencing batch reactors (SBR), while no successful aerobic granulation has been observed in continuous culture. Compared with continuous microbial culture, the main feature of SBR is its cycle operation, each cycle consisting of filling, aeration, settling and discharging.

A newcomer to the scene, aerobic granulation is on its way to becoming the hot new technology for high-efficiency wastewater treatment. Thus far, intensive research has been conducted with regard to the understanding of the mechanism of aerobic granulation in sequencing batch reactors (SBR) and its application in treating a wide variety of municipal and industrial wastewater.

C.H. Chan, P.E. Lim, Evaluation of sequencing batch reactor performance with aerated and unaerated FILL periods in treating phenol-containing wastewater, Bioresour. Technol., 98 (2007) 1333-1338. H.Q. Yu, G.W. Gu, Treatment of phenolic wastewater by sequencing batch reactors with aerated and unaerated fills, Waste. Manage., 16 (1996) 561-566.

Qin L, Tay JH, Liu Y (2004) Selection pressure as a driving force of aerobic granulation in sequencing batch reactors. Proc Biochem 39:579-584. CAS Article Google Scholar Song Y, Ishii S, Rathnayake L, Ito T, Satoh T, Okabe S ( ) Development and characterization of the partial nitrification aerobic granules in a sequencing batch airlift reactor. Bioresour Technol 139:285-291. CAS

A generalized model was established for simulating an aerobic granule-based sequencing batch reactor (SBR) with considerations of biological processes, reactor hydrodynamics, mass transfer, and diffusion. Methodology of discretization was effectively used for the model development and calculations. The activated sludge model was modified to describe the biological processes within the

Abstract Aerobic granular sludge was cultivated in an intensely mixed sequencing batch airlift reactor (SBAR). A COD loading of 2.5 kg Acetate-COD/ (m 3 d) was applied. Granules developed in the reactor within one week after inoculation with suspended activated sludge from a conventional wastewater treatment plant.

21 Aerobic granular sludge (AGS) is an innovative technology for the biological wastewater treatment 22 worldwide. AGS is characterised as compact and dense biomasswhich settles much faster than flocculent 23 sludge. Up to now, AGS is only realised in sequencing batch reactors (SBR). These systems offer an easy

Lotka-Volterra equation based modeling of aerobic granulation process in sequencing batch reactors. International Biodeterioration Na Li. Development and characterization of the 2,4,6-trichlorophenol (2,4,6-TCP) aerobic degrading granules in sequencing batch airlift reactor. International Biodeterioration & Biodegradation , 95, 61-66. DOI: 10.1016/j.ibiod. .03.019. Marieska