military base
Layer : contaminated layer on the ground
water surface
Concentration reductions and constituent concentrations are difficult to achieve.
May not be effective for high constituent concentrations
Presence of significant heavy metal concentrations may inhibit microbial growth.
Volatile constituents tend to evaporate
Requires a large land area
of Thermal, Mechanical and Chemical Properties
Down the Cost of Production
High-Reliance
WHAT IS cvd?
Principle of cvd
High purity and quality deposition
Good economy and process control
A great variety ofchemical compositions
High step coverage
Selective deposition
AdvantageS of CVD
Classification of CVD
Thermal(conventional) CVD
- Operating Temp. : 800 1200 ℃
- Mass Products
-
chemical composition and structure of a
surface on the 1–100 nm length scale is important to researchers
studying topics ranging from electronic conduction, to catalysis, to
biological recognition in nanoscale systems.
While microfabrication techniques such as photolithography, microcontact
printing, micromachining, and microwriting can produce patterns as small
1] bioethanol process
① pretreatment of raw material
To increase the effectiveness of fibrin degradation, pretreatment is necessary. The purpose of pretreatment improves the efficiency of the reaction (hydrolysis) by converting cellulose and its chemical composition and physical form and especially improves the accessibility of the enzyme.
[Figure 2] Pretreatment process
of diesel fuel manufactured from vegetable oils, animal fats, or recycled restaurant greases.
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Fig 1. K. Hoekman, A. Broch, C. Robbins, E. Ceniceros and M. Natarajan, Review of Biodiesel Composition, Poperties, and Specifications, Renew. Sustain.