1. Problem
인은 생물체를 이루는 필수적인 요소 중 하나이다. 보통 식물에는 0.2~0.8% 정도가 함유되어 있고, 특히 조류 등의 해양생물체에는 0.1~0.12% 정도의 미량만이 존재하기 때문에 순수한 생태계에서 인이 미치는 환경적 영향은 매우 미미하다. 하지만 비정상적인 먹이 사슬로 인하여 생태계에 인이
removes because of negative PR.
○ Wet etching
SiO2
N-type
Si
N-type
SiO2
⦁SiO2 that does not have PR is removed by wet etching and also remaining PR is removed by acetone.
Source Drain Opening
○ SiO2 Deposition ( 100nm ) ○ PR(positive) Coating
SiO2
SiO2
N-type
Si
N-type
SiO2
⇒
PR
Grit chamber
Definition
Remove the grit and inorganic matter over 0.2mm in waste water
[ Function ]
Prevent abrasiona and damage of machine equipment
Prevent Piping system blockage
Prevent adverse effect by deposits
Gravity type chamber
Using the gravity and velocity of waste water
Take the deposits to sludge facility, using sand pump
Aeration type chamber
Using centri
PHB`s Separation & Purification
Target of this study conducted to obtain a purely material PHB purification process debris in the damaged cells, and to remove the remaining medium components. PHB has been removed during the refining process with just remove the present efficiency of the overall purification stayed in the 70-80%.
PHB Synthesis Pathway
Alcaligenes eutrophus PHB in normal circ
Process Selection Considerations
Selection of an activated-sludge process for BOD removal and nitrification is a function of many considerations including specific site constraints, compatibility with the existing process, compatibility with existing equipment, present and future treatment needs, level of capability of the operating staff, capital costs, and operating cost.
Complete-mix activ