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Use of cyclodextrins for odor control in papermaking sludges, and deodorized sludge and products

一种造纸污泥、环糊精的技术，应用在污泥脱毒、水/污泥/污水处理、造纸等方向，能够解决未涉及密集的厌氧生物活性体、应用成本高等问题

Inactive Publication Date: 2010-07-21
BUCKMAN LAB INT INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Secondary sludge has the consistency of gelatin and mechanical dewatering means are largely ineffective
Attempts can be made to control the odor of paper sludge by using harsh non-biodegradable materials (such as chlorine or chloride), enzymes, hydrogen peroxide, or other materials containing peroxygen, but the application cost may can be too high, and / or the results are often only temporary
[0008] Cyclodextrins have been suggested for odor management in household / textile applications, sprayed onto fabric fresheners and mixed with the textile fibers of clothing, but these environments have not yet involved intensive anaerobic Bioactive body

Method used

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  • Use of cyclodextrins for odor control in papermaking sludges, and deodorized sludge and products
  • Use of cyclodextrins for odor control in papermaking sludges, and deodorized sludge and products
  • Use of cyclodextrins for odor control in papermaking sludges, and deodorized sludge and products

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Experimental program
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Embodiment 1

[0057] Embodiment 1: research cyclodextrin can measure hydrogen sulfide ((H 2 S)) Influence

[0058] Test samples were prepared using 200 g of paper sludge obtained from a MeadWestvaco plant (Mahrt, AL.), which was added to 800 g of 50 mM phosphate buffer solution (pH 7.1). Phosphate buffer solution consists of 2.503g KH 2 PO 4 (anhydrous) / L and 5.47g K 2 HPO 4 (Anhydrous) / L mixed. Different forms of cyclodextrins, namely β-cyclodextrin and hydroxypropylated β-cyclodextrin, were detected in sludge samples at different dosage levels.

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Abstract

Methods to control and suppress odor in papermaking sludge are described. One method Involves admixing sludge from a papermaking process and cyclodextrin to provide treated sludge with the cyclodextrin present in an effective amount to control odors in the treated sludge. The deodorized sludge may be used as a component of resin-wood composite products, such as composite decking materials, walls, flooring, casting forms, and the like.

Description

[0001] This application claims priority under 35. U.S.C. § 119(e) to U.S. Provisional Patent Application 60 / 946,764 (filed June 28, 2007), which is hereby incorporated by reference in its entirety. technical field [0002] This invention relates to methods of controlling odor in paper sludge and other paper waste, and more particularly to the use of cyclodextrins to control and / or suppress odor in paper sludge, and the resulting The deodorized sludge and the composite product (composite product) mixed with the deodorized sludge. Background technique [0003] Traditional paper, cardboard, and related paper product manufacturing processes often generate large amounts of paper sludge as a by-product. Large paper mills generate many tons of sludge every day. Great attention has been paid to the disposal of these sludges in the paper industry. [0004] Sludge by-products are produced in the papermaking process in the general manner described below. Paper is generally produced ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C11/08C02F11/00D21H23/78C02F11/147
CPCC02F11/004D21C5/00C02F2303/02D21C11/08C02F2103/28C02F11/14C02F11/147
Inventor 詹姆斯·N·格雷厄姆杰拉尔德·M·戴克斯特拉斯科特·D·布拉努姆
Owner BUCKMAN LAB INT INC