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2 edition of Granular sludge formation in upflow anaerobic sludge blanket (UASB) reactors found in the catalog.

Granular sludge formation in upflow anaerobic sludge blanket (UASB) reactors

Jens E. Schmidt

Granular sludge formation in upflow anaerobic sludge blanket (UASB) reactors

by Jens E. Schmidt

  • 298 Want to read
  • 33 Currently reading

Published by Wiley in New York .
Written in English


Edition Notes

Photocopy of: Biotechnology and bioengineering, vol. 49, (1996), pp.229-246.

Other titlesBiotechnology and bioengineering.
StatementJens E, Schmidt and Birgitte K. Ahring.
ContributionsAhring, Birgitte K.
ID Numbers
Open LibraryOL16528976M

The loss of granular sludge and acidification of sludge are common problems in highly efficient anaerobic reactors in operation at present, which results in that the reactors cannot reach the design COD removal rates. The problems must be solved for the widespread use of the highly efficient anaerobic reactors. There are many different studies on the formation and loss of granular sludge Author: Guan Xijun, Xia Lijia. The upflow anaerobic sludge blanket reactor (UASB) is a single tank process. Wastewater enters the reactor from the bottom, and flows upward. A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it.. The sludge blanket is comprised of microbial granules (1 to 3 mm in diameter), i.e., small agglomerations of microorganisms that, .

Aerobic granulation. The biological treatment of wastewater in the sewage treatment plant is often accomplished using conventional activated sludge systems. These systems generally require large surface areas for treatment and biomass separation units due to the generally poor settling properties of the sludge. ash content of the granular sludge. Support material has been shown to have positive effect on the formation of granular sludge. Key words: Granulation, UASB reactor, support material, weathered granite, minerals. INTRODUCTION Upflow anaerobic sludge blanket (UASB) process is a simple and effective waste-Cited by: 1.

This book covers a fruitful literature review of the anaerobic process. It includes a description of the different kinds of anaerobic reactors, emphasizing on UASB reactor. It takes into account the granules development, the kinetics models, and a review of the existing models describing the UASB reactor behavior.3/5(1). and operation of anaerobic sludge blanket reactors can be found in Chernicharo (), Metcalf & Eddy and AECOM (), and Foxon et al. (). Figure 5. Sludge drying beds for the wasted upflow anaerobic sludge blanket (UASB) sludge at Sololá, Guatemala. The sludge is well digested and dried and is currently provided to the public in bags as.


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Granular sludge formation in upflow anaerobic sludge blanket (UASB) reactors by Jens E. Schmidt Download PDF EPUB FB2

The state of the art for upflow anaerobic sludge blanket (UASB) reactors is discussed, focusing on the microbiology of immobilized anaerobic bacteria and the mechanism of granule formation.

The development of granular sludge is the key factor for successful operation of the UASB reactors. Criteria for determining if granular sludge has developed in a UASB reactor is given based on the densities and diameters of the granular sludge.

The shape and composition of granular Cited by:   Anaerobic/anoxic denitrifying reactors, such as an upflow sludge blanket (USB) reactor, can retain high concentration of biomass inside of the reactor.

The state of the art for upflow anaerobic sludge blanket (UASB) reactors is discussed, focusing on the microbiology of immobilized anaerobic bacteria and the mechanism of granule formation.

The development of granular sludge is the key factor for successful operation of the UASB reactors. (1) Schmidt, Jens E., and Birgitte K. Ahring. "Granular sludge formation in upflow anaerobic sludge blanket (UASB) reactors." Biotechnology and Bioengineering (): (2) MacLeod, F.

A., S. Guiot, and J. Costerton. "Layered structure of bacterial aggregates produced in an upflow anaerobic sludge bed and filter reactor.". Sludge flotation is a commonly reported and long-standing issue hindering not only the widespread implementation of upflow anaerobic sludge bed (UASB)-type bioreactors in wastewater treatment but also the development of novel anaerobic/anoxic treatment processes such as anammox, partial denitrification, and biological sulfate by: 5.

Digested sludge was sourced from a methophilic anaerobic digester (35 ± 1 °C) of a municipal wastewater treatment plant (WWTP) in Sendai, Japan. Anaerobic granular sludge was withdrawn from sludge treatment plant effluent mixture of ethanol and sugar factory waste water in Tokyo, by: due to the unique granular structure and high biomass concentration in the reactor [5].

Aerobic granular sludge was first studied in an aerobic upflow sludge blanket reactor for municipal sewage treatment [6]. Other reactors with strong mixing ability were also employed for forming aerobic granular sludge, including a sequencing batchCited by: 5.

I have heard that it can take up to 8 months to form granular sludge in a new Upflow Anaerobic Sludge Blanket (UASB). formation in upflow anaerobic sludge blanket (UASB) reactors.

Anaerobic granular sludge technology has been extensively studied and is widely applied in established aerobic granules in an upflow sludge blanket reactor.

The technology was further developed in sequencing batch reactors (SBRs) (van Loosdrecht and Guideline for granular sludge reactor design --File Size: KB. The upflow anaerobic sludge blanket reactor (UASB) is a single tank process. Wastewater enters the reactor from the bottom, and flows upward.

A suspended sludge blanket filters and treats the wastewater as the wastewater flows through it. The sludge blanket is comprised of microbial granules (1 to 3 mm in diameter), i.e., small agglomerations.

Books Journals Engineering Research. Applied Mechanics and Materials Advances in Science and Technology International Journal of Engineering Research in Africa Advanced Engineering Forum Journal of Biomimetics, Biomaterials and Biomedical Engineering Materials Science.

Sterile granular sludge was inoculated with either Methanosarcina mazeii S-6, Methanosaeta concilii GP-6, or both species in acetate-fed upflow anaerobic sludge blanket (UASB) reactors to investigate the immobilization patterns and dynamics of aceticlastic methanogens in granular sludge.

After several months of reactor operation, the methanogens were immobilized, either Cited by: granular sludge from the anaerobic sludge bed reactor were determined by using a novel upflow velocity test.

From the results, it was concluded that iron promoted granulation. The U10% (10% of sludge washed out by applying upflow velocity U10%) was increased from 0,23 m.h-1 to 13,21 m.h, while. An anaerobic granular sludge used for treating artificial wastewater containing acetate, propionate (VFAs), and sucrose at psychrophilic temperature (below 20oC) was used as the seed material.

Figure 1 Schematic diagram of the UASB reactor used in this study The seeded granular sludge was acclimatized sequentially by feeding IPA followed by TMAH. The accelerating start-up of anaerobic ammonium oxidation (anammox) process in an upflow anaerobic sludge blanket (UASB) reactor was achieved by seeding aerobic granules.

The structure and physicochemical properties of the anammox granules and the reactor performance were : Bing-Jie Ni. This granular sludge bed reactor is the most frequently used, and is suitable for effluents that lead to the formation of this type of sludge (see anaerobic bacterial cultures).

In this upflow type reactor, the effluent distributed over the base of the reactor passes through the sludge blanket. ANAEROBIC SLUDGE BLANKET REACTORS Brief Technology Description. Upflow anaerobic sludge blanket (UASB) reactors, expanded granular sludge bed (EGSB) reactors and anaerobic baffled reactors (ABRs) are considered high-rate anaerobic process reactors that are designed to remove organic matter (measured as biochemical oxygen demand (BOD) or.

Using conventional flocculent activated sludge as seeding sludge, two types of mature aerobic granular sludge were respectively cultivated in the same two sequencing batch reactors (SBR) by promoting and inhibiting filamentous bacteria growth.

In R1 reactor the mature aerobic granular sludge was cultivated by promoting filamentous bacteria growth, and the whole Cited by: 6. The Upflow Anaerobic Sludge Blanket Process (UASB) has been around for many years, so it clearly can work well. But, unfortunately, this type of AD treatment can only handle quite low contamination levels in effluents, but with the right effluent the gas yield provides a very useful income to offset the cost of running the process.

The upflow anaerobic sludge blanket (UASB) reactor has been recognized as an important wastewater treatment technology among anaerobic treatment methods. The objective of this study was to perform literature review on the treatment of domestic sewage using the UASB reactor as the core component and identifying future areas of research.

The merits of anaerobic Cited by:. An enhanced start-up of an upflow anaerobic sludge blanket (UASB) reactor for diosgenin wastewater treatment was designed and experimentally tested. Granular sludge was formed on day 35 in the reactor with high concentrations of chloride ( mg/L) and COD ( mg/L) as by: 1.In this study, we assessed the use of upflow anaerobic sludge blanket (UASB) reactor technology as applied to anaerobic ammonia removal, or Anammox.

Four ml UASB reactors were inoculated with 50% (by volume) anaerobic granular sludge and 50% flocular sludge from different sources (all with the potential for containing Anammox organisms).Cited by:   Bacterial communities, taxonomic functional groups, and chemical characteristics of granular sludge were assessed in an ultrahigh-temperature (70°C) upflow anaerobic sludge blanket reactor (UASB) used to treat super heavy oil-containing by: 4.