東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back to Search results for [ null ]

Switch To: Labeled | MARC Mode | ISBD

Process Development and Fundamental ...

Chen, Hui.

Linked to FindBook

Google Book

Amazon

博客來

Process Development and Fundamental Study on Enzymatic Hydrolysis of Cellulosic Biomass to Fermentable Sugars for Ethanol Production.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Process Development and Fundamental Study on Enzymatic Hydrolysis of Cellulosic Biomass to Fermentable Sugars for Ethanol Production./
Author:	Chen, Hui.
Description:	238 p.
Notes:	Source: Dissertation Abstracts International, Volume: 76-05(E), Section: B.
Contained By:	Dissertation Abstracts International76-05B(E).
Subject:	Chemical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3647607
ISBN:	9781321413571

Process Development and Fundamental Study on Enzymatic Hydrolysis of Cellulosic Biomass to Fermentable Sugars for Ethanol Production.
Chen, Hui.

Process Development and Fundamental Study on Enzymatic Hydrolysis of Cellulosic Biomass to Fermentable Sugars for Ethanol Production. - 238 p.

Source: Dissertation Abstracts International, Volume: 76-05(E), Section: B.

Thesis (Ph.D.)--North Carolina State University, 2014.

This item must not be sold to any third party vendors.

Waste paper materials such as office paper, newspaper and paper sludge present unique advantages for bioethanol production. They are abundant, low lost and require less intensive pretreatment to open up the lignocellulosic structure for enzymatic hydrolysis. The objective of this research is to develop conversion processes that are technically and economically feasible for producing ethanol from waste paper materials. Identifying and understanding the inhibition factors in lignocellulosic biomass and enzymes that influence enzymatic hydrolysis of fermentable sugars are also covered. A fundamental study of the effects of pretreatment and lignin removal on softwood was also conducted because softwood is a major wood resource in many parts of the world and a major source of paper materials.

ISBN: 9781321413571Subjects--Topical Terms:

560457
Chemical engineering.

Process Development and Fundamental Study on Enzymatic Hydrolysis of Cellulosic Biomass to Fermentable Sugars for Ethanol Production.
LDR:05627nmm a2200373 4500 001 2060770
005 20150924074415.5
008 170521s2014 ||||||||||||||||| ||eng d
020 $a 9781321413571
035 $a (MiAaPQ)AAI3647607
035 $a AAI3647607
040 $a MiAaPQ $c MiAaPQ
100 1 $a Chen, Hui. $3 1084303
245 1 0 $a Process Development and Fundamental Study on Enzymatic Hydrolysis of Cellulosic Biomass to Fermentable Sugars for Ethanol Production.
300 $a 238 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-05(E), Section: B.
500 $a Advisers: Richard Venditti; Hasan Jameel.
502 $a Thesis (Ph.D.)--North Carolina State University, 2014.
506 $a This item must not be sold to any third party vendors.
520 $a Waste paper materials such as office paper, newspaper and paper sludge present unique advantages for bioethanol production. They are abundant, low lost and require less intensive pretreatment to open up the lignocellulosic structure for enzymatic hydrolysis. The objective of this research is to develop conversion processes that are technically and economically feasible for producing ethanol from waste paper materials. Identifying and understanding the inhibition factors in lignocellulosic biomass and enzymes that influence enzymatic hydrolysis of fermentable sugars are also covered. A fundamental study of the effects of pretreatment and lignin removal on softwood was also conducted because softwood is a major wood resource in many parts of the world and a major source of paper materials.
520 $a Different types of waste paper materials were studied in this research in terms of their feasibility for fermentable sugar production via enzymatic hydrolysis. In Chapter 2, low enzyme dose on recovered office paper was investigated. Ash removal was identified to be necessary since both acid soluble and acid insoluble ash adsorbed enzyme during enzymatic hydrolysis. This ash-enzyme interaction was proven to have higher affinity than cellulose-enzyme interaction. The effect of hornification - irreversible pore collapse in lignocellulosic fibers was also studied. Mechanical refining by a PFI mill of previously dried fibers improved sugar recovery to similar or higher levels as never dried fibers.
520 $a Paper sludge is another attractive biomass source for the conversion to ethanol. A mechanical fractionation process was proposed in Chapter 3 in order to remove ash from sludge prior to enzymatic hydrolysis. This process removed 82-98% of the ash with fiber yields from 39-69%. Fractionation efficiency was also evaluated by testing different size mesh screen openings, aiming to optimize this fractionation process. The ash rich streams had a lower C:N ratio than the original sludge, which improved its suitability as soil amendment.
520 $a In Chapter 4, process simulation using engineering process simulation software WinGEMS and financial analysis on the feasibility of the process developed in Chapter 3 were conducted. The financial impact of the addition of the sludge fractionation step was discussed based on using sludge from virgin and recycled paper mills. The most profitable case was fractionated virgin sludge (from a virgin paper mill) to ethanol (F-VK1) with a net present value (NPV) of US$ 11.4 million, internal rate of return (IRR) of 28%, payback period of 4.4 years and minimum ethanol revenue (MER) of US$ 0.32 per liter. Risk analysis showed that the F-VK1 case obtained a near 100% probability of business success with both optimistic and pessimistic assumptions.
520 $a Newspaper contains high lignin content among various waste paper materials. Chapter 5 is focused on developing a pretreatment process ideal for newspaper saccharification. The effects of non-ionic surfactant and flexo link were also studied. Tween 80 improved sugar conversion of newspaper and flexo ink was proven to have no inhibition effects on enzymatic hydrolysis. Pretreatment including autohydrolysis, mechanical refining, oxygen, alkaline and green liquor (GL) pretreatments were evaluated on newspaper. Except mechanical refining and oxygen pretreatment, all the other pretreatment methods adversely affected enzymatic hydrolysis of newspaper. It was presumably due to the pore collapse in the fibers during the pretreatment process.
520 $a Softwoods are the dominant lignocellulosic feedstocks in the Northern hemisphere and viewed to be attractive and sustainable for ethanol fuel production. However, lignocellulosic biomass, especially softwood, is recalcitrant to biological degradation due to its rigid and compact structure, as well as its chemical compositions. In Chapter 6, a fundamental study on the effect of lignin removal by different pretreatments was performed. Lignin by oxidative treatment yielded higher enzymatic hydrolysis efficiency than kraft pulping and this was especially significant with sodium chlorite pretreatment. Factors affecting softwood saccharification were investigated by generating softwood fibers with the same bulk lignin content (11.3%-13.7%) by kraft pulping, sodium chlorite, oxygen and high consistency ozone delignification. Lignin hydrophobicity was identified as one of the most important factors influencing enzymatic hydrolysis of softwood.
590 $a School code: 0155.
650 4 $a Chemical engineering. $3 560457
650 4 $a Forestry. $3 895157
650 4 $a Energy. $3 876794
650 4 $a Finance. $3 542899
690 $a 0542
690 $a 0478
690 $a 0791
690 $a 0508
710 2 $a North Carolina State University. $3 1018772
773 0 $t Dissertation Abstracts International $g 76-05B(E).
790 $a 0155
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3647607