Methods and systems for producing granules of biomass in the treatment of wastewater

A technology of biomass particles and biomass, which is applied in energy wastewater treatment, natural water treatment, biological water/sewage treatment, etc.

Inactive Publication Date: 2012-09-26
BP CORP NORTH AMERICA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention solves many problems in existing wastewater treatment systems

Method used

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  • Methods and systems for producing granules of biomass in the treatment of wastewater
  • Methods and systems for producing granules of biomass in the treatment of wastewater
  • Methods and systems for producing granules of biomass in the treatment of wastewater

Examples

Experimental program
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Embodiment 1

[0036] The method and system of one embodiment of the invention were demonstrated in a laboratory pilot plant. The anaerobic zone was configured as a 10 L upflow anaerobic sludge blanket reactor (UASB) with overflow recirculation. The reactor was maintained at 38°C and pH 6.8.

[0037] Wastewater streams from a purified terephthalic acid manufacturing process containing varying amounts of TOC were fed to a UASB with an upflow velocity of 2.2 m / hr. A portion of the water withdrawn from the top of the UASB reactor was recirculated and another portion was fed into the aerobic zone configured as three aeration tanks in series. Air is fed into each cell. Spent sludge was recirculated back into the UASB from the bottom of the last aeration tank, and the amount of sludge transferred was calculated as the ratio of recirculated spent activated sludge solids to solids in the UASB. In additional trials to establish baseline growth yields, waste sludge was not transferred back to the U...

Embodiment 2

[0042] The method and system of one embodiment of the invention were also demonstrated in a commercial scale pilot plant. The anaerobic zone was configured as a Biothane EGSB reactor with a reactor volume of 851 cubic meters. The reactor was maintained at 38°C and a pH range of 6.8 to 7.0.

[0043] Wastewater streams from a purified terephthalic acid manufacturing process containing various amounts of TOC were fed to a reactor with an upflow velocity of 2.6 m / hr. A portion of the water drawn from the top of the reactor is recirculated and another portion is fed to the aerobic tank. The spent sludge was transferred from the bottom of the aeration tank back into the anaerobic reactor and was calculated as the ratio of recirculated spent activated sludge solids to solids in the anaerobic reactor. In two additional baseline experiments, no waste sludge was transferred back to the anaerobic reactor.

[0044] The results shown in Table 2 demonstrate that the process of the presen...

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Abstract

The method for treating wastewater, comprising treating wastewater in an anaerobic zone to remove organic matter from the wastewater in an anaerobic zone to remove organic matter from the wastewater and to form granules of a biomass; transferring wastewater effluent from the anaerobic zone to an aeration zone; treating the wastewater effluent with a source of oxygen and an activated sludge in the aeration zone to further remove organic matter from the wastewater effluent and to form additional activated sludge; and transferring a portion of the activated sludge from the aeration zone to the anaerobic zone.

Description

[0001] related application [0002] This application claims priority to US Serial No. 61 / 291,147, filed December 30, 2009, which is hereby incorporated by reference in its entirety. technical field [0003] The present invention relates to methods and systems for treating wastewater. In particular, the present invention relates to methods and systems for producing biomass particles in wastewater treatment. Background technique [0004] Wastewater from industrial processes or municipal sewage contains significant amounts of organic matter that must be removed. Conventional systems for treating wastewater have utilized microorganisms that accumulate in biomass, sometimes referred to as activated sludge, to digest organic matter. Such systems typically consist of two stages - the first stage is an anaerobic zone containing granular biomass and the second stage is an aerobic zone containing activated sludge. Anaerobic zones are generally more cost-effective for removing large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/12
CPCC02F3/2846C02F2203/002C02F2103/365C02F3/282C02F2101/345C02F2303/10C02F2103/36C02F3/12Y02W10/10Y02W10/30
Inventor 斯科特·卡利卡洛莱恩·施密特梅尔特姆·厄古恩-德米尔塔斯
Owner BP CORP NORTH AMERICA INC
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