膜接触器和集成膜操作

作者简介

本书几乎包含膜科学与工程所有方面的内容：从基本现象到最前沿的应用，以及未来的前景。现代膜工程是工艺强化策略的关键环节，可以大大促进工业的增长。本书是研究人员以及行业管理人员的必备工具。

书籍目录

第4卷的编者
总目录
引言
第4卷  膜接触器和集成膜操作
  膜接触器基本原理
    4.01  膜蒸馏和渗透蒸馏
    4.02  膜结晶技术
    4.03  膜乳化技术
    4.04  液膜
  各种工业部门中的集成膜技术：实例
    4.05  各种工业部门中的集成膜技术
    4.06  食品和发酵工业中的膜技术基础及应用
    4.07  水处理过程中的膜生物反应器
    4.08  膜技术：石油炼制和石油化学工业中的最新应用
    4.09  用于海水和苦咸水淡化的膜系统
  总索引

编辑推荐

《膜接触器和集成膜操作(导读版)》展示和讨论了近年来膜科学与工程方面取得的一些最具重大作用的成果。着重于膜技术在能源、环境、生物医学、生物技术、化学制造等领域的应用。 《膜接触器和集成膜操作(导读版)》适合材料、化学化工、环境等领域的师生、科研人员阅读参考。

内容概要

无

章节摘录

版权页：   插图：   Carrageenan is produced from difierent genera and species of red algae,for example,Chondudrus cripus,Eucheuma,and Gigartina stellata.This results in specific types of carrageenan,which are blended to obtain auniform product.The seaweed is typically harvestedby ranking and then dried before being shipped to aprocessing plant,where the seaweed is cleaned bywater and hammer-milled to expose the inner surface of the seaweed prior to extraction.During the initialextraction step.the carrageenan is dissolved in 70-75℃ hot water containing alkaline reagents such ascalcium and sodium hydroxide.The resulting paste isthen stored for 2-24h in holding tanks at 90-95℃ and finally mixed with filter aids such as diatomite orexpanded perlite.By using a filter press for clarification，the hydrocolloids are removed from the solubleimpurities,which results in a pale syrupy liquid containing 0.8-1.0％of carrageenan.The carrageenan isthen pH-adjusted and concentrated by UF at approxi-mately 90℃.At this high temperature,carrageenan concentrations of up to 3-5％can be achieved.Whichis equivalent to 3-5 times volume reduction.In addition,salts，color,sugar,and Otller low-molecular-weight components (LMWCs)are removed fromcarrageenan with the permeate leading to high purities.The energy consumption of UF is 20-30kWhm-3 lower than for evaporation requiringfor the same duty 30-50kWhm-5.The subsequentsteps in the carrageen production depend on thedesired final product.The carrageen can be eitherdirectly dried in a drum or roll-drier or be furtherpurified by precipitation in either water or alcoholfollowed by pressing and drying before blending.

图书封面

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