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Tuesday, May 5, 2020 | History

2 edition of Evaluation and demonstration of the capillary suction sludge dewatering device found in the catalog.

Evaluation and demonstration of the capillary suction sludge dewatering device

T. E. Lippert

Evaluation and demonstration of the capillary suction sludge dewatering device

by T. E. Lippert

  • 357 Want to read
  • 8 Currently reading

Published by Environmental Protection Agency, Office of Research and Development, National Environmental Research Center in Cincinnati, Ohio .
Written in English

    Subjects:
  • Sewage sludge -- Drying.,
  • Sewage disposal.

  • Edition Notes

    Statementby T. E. Lippert, M. C. Skriba.
    SeriesEnvironmental protection technology series ; EPA-670/2-74-017, Research reporting series -- EPA-670/2-74-017.
    ContributionsSkriba, M. C., National Environmental Research Center (Cincinnati, Ohio)., Westinghouse Electric Corporation.
    The Physical Object
    Paginationix, 71 p. :
    Number of Pages71
    ID Numbers
    Open LibraryOL15213764M

    EPA/ August EVALUATION OF DEWATERING DEVICES FOR PRODUCING HIGH-SOLIDS SLUDGE CAKE by Alan F. Cassel and Berinda P. Johnson District of Columbia . This water travels radially from the base of the column due to capillary suction pressure of the porous layer. The rate of movement through the porous layer is primarily dependent on the permeability of the Cited by: 3.

      A modified capillary suction time apparatus for measuring the filterability of super-flocculated sludges P. A. Vesilind 1 Department of Civil and Environmental Engineering, Duke Cited by: This study demonstrated a novel nanoadditive technology to lower the energy use for sludge dewatering in wastewater treatment plants. Mechanical dewatering devices such as centrifuges and belt filter .

    SECTION V SLUDGE DEWATERING "PILOT PLANT" TESTS A. General Sludge dewatering considerations necessitated the on site services of "pilot plants" of various types and modes of dewatering to effectively evaluate and determine the most cost effective system. Initially the evaluation . EPA'S Innovative and Alternative Wastewater Facilities Technology Database: User's Manual, April! Evaluation and Demonstration of the Capillary Suction Sludge Dewatering Device, March • Evaluation of "Within Vessel" Sewage Sludge Composting Systems in Europe (Draft), April Evaluation of Dewatering Devices .


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Evaluation and demonstration of the capillary suction sludge dewatering device by T. E. Lippert Download PDF EPUB FB2

The system uses capillary action to initially dewater the sludge and form a thin sludge cake which is then mechanically compressed in a final step to obtain a still dryer cake. Both dewatering steps are incorporated into a single system endless belt design.

Sludge feed capacities. Additional Physical Format: Online version: Lippert, T. Evaluation and demonstration of the capillary suction sludge dewatering device.

Cincinnati, Ohio: Environmental Protection Agency. Westinghouse Electric Corporation: Evaluation and demonstration of the capillary suction sludge dewatering device / (Cincinnati, Ohio: Environmental Protection Agency, Office of Research and.

Evaluation of sludge dewaterability. Common parameters used to evaluate sludge dewatering properties include capillary suction time (CST), time to filter (TTF), and specific resistance to Cited by: dewatering, drying and pasteurizing biosolids and other residuals, termed the “J-Vap.” The.

device modifies a conventional recessed chamber filter press by applying increased temperature. and. INTRODUCTION The dewaterability of a sludge can be characterized by two ways: the residue moisture amount in the sludge cake after a dewatering process (the 'bound water'), and the easiness of the filtration of the sludge Cited by: The cake is usually removed before cracking occurs, as cracking tends to damage the precoat.

During cake discharge, cake and a few thousandths of an inch of precoat are cut away by means of a continuously advancing knife. This fresh precoat surface is then rotated into the sludge to begin the dewatering cycle File Size: KB.

The presence of microbial extracellular polymer (ECP) is important for sludge flocculation, but ECP has also been shown to have a detrimental effect on the dewaterability of certain sludge types. £2, Type Multi purpose CST. The Triton Type Multi-purpose CST can be used with either 5 single radius test heads or with one multi-radii.

The first part of the study was an experimental study of sludge dewatering improvement in terms of dry solids content of the dewatered cake and the evaluation of specific resistance to filtration. Sludge samples taken from different sources and times may have different characteristics that could affect dewatering performance.

In this study, 20 sludge samples from five wastewater Cited by: This paper reports findings from a recent study that investigated the feasibility of using capillary suction timer (CST) as a tool to determine the performance of sludge dewatering.

This laboratory research studied sludge samples taken from three different sludge. The dewatering of chemically acidified sludge was investigated to reveal the respective role of sludge floc structure and sludge extracellular polymeric substances (EPS) in influencing the removal.

As an alternative to gravity drainage, the capillary suction sludge dewatering device, the Squeegee*, shown schematically in Fig utilizes capillary suction to provide a cake suitable for pressing, potentially allowing a reduction in the amount of conditioning required.

The other unique feature of this unit is the cake discharge mechanism. Results showed that the dewatering and drying efficiency of the device primarily de. pends on the residual type and the selection of the right combination of conditioners.

The pilot scale. Diagrammatic arrangement of a 4-plug sludge concentrator. 90 Arrangement of rotary-kiln drier 93 Simplified diagram of Atritor-drier 94 PLATES (Between page 50 and 51) 1. Apparatus to determine capillary suction time. General view of sludge drying beds. Mechanical lifting equipment on sludge.

sludge disintegration methods on sludge moisture distribution and dewatering performance, it was concluded that ultrasound treatment deteriorated the sludge dewaterability [19].

Fig. 1 showed the effects of acid hydrolysis of sewage sludge on capillary suction. The absence of Rheological properties in sludge management hysteresis may be cited as evidence to this effect, but for some systems this may be impossible.

As an alternative, one might desire to measure the rheological properties of a sludge under precisely the conditions to be encountered in situ (e.g. inside a dewatering Cited by: CHAPTER 4 SLUDGE CONDITIONING Sludge conditioning is a process whereby sludge solids are treated with chemicals or various other means to prepare the sludge for dewatering processes, in other words, to improve dewatering characteristics of the sludge.

MECHANISMS TO CONDITION THE SLUDGE There are two mechanisms involved in sludge File Size: KB. of dewatering raw or digested sewage sludges. The scroll conveyor bowl centrifuge is the most suitable type for dewatering sewage sludge.

Activated sludge cannot be dewatered economically by centrifuge unless mixed with primary sludge File Size: 2MB. The aim of this review paper is to critically assess recent trends in capillary suction time (CST) dewaterability testing research.

The importance of floc structure in explaining practical dewaterability problems such as filter paper clogging is assessed. Current literature on CST for sludge Cited by: Key Characteristics of Sludge for Dewatering Equipment Suppliers 4) Capillary Suction Time – An older test Standard Methods G A good indicator of how sludge releases water, how much coagulant or flocculant will be required.

Sludge File Size: 2MB.It is sludge filterability that, predominantly, governs the output of nearly all various types of dewatering equipment, including: drying beds, belt press, vacuum filters, filter presses and centrifuges.

The capillary suction pressure generated by standard filter paper is used to ‘suck’ water from the sludge.