REACTORS USED IN WASTEWATER TREATMENT

추적자 시험(Tracer Test)

추적자 실험은 주입 방법에 따라 Pulse 주입법(혹은 Slug method)과 Step 주입법의 2가지 형태로 구분된다.

Pulse 주입법은 유입부에서 충분히 많은 양의 추적자를 순간적으로 주입한 후 일정한 시간 간격으로 유출부에서 농도를 확인하는 시험이며, Step 주입법은 일정한 농도의 추적자를 지속적으로 주입하여 유출부에서의 추적 농도가 일정한 농도가 될 때(Steady-state)까지 유출 부의 농도를 확인하는 방법이다.

 

Pulse 주입법

 

 

Step 주입법

 

 

 

INTRODUCTION TO TREATMENT PROCESS MODELING

Type of reactor	Applications in wastewater treatment
Batch	Conduct of BOD test, sequencing batch reactor activated sludge biological treatment, mixing of concentrated solutions into working solutions
Complete-mix without recycle	Aerated lagoons, aerobic sludge digestion, anaerobic digestion
Complete-mix with recycle	Activated sludge biological treatment
Plug-flow	Chlorine contact basin, reaeration basin, natural treatment systems
Plug-flow with recycle	Activated sludge biological treatment, aquatic treatment systems
Complete-mix reactors in series	Lagoon treatment systems, used to simulate nonideal flow in plug flow reactors
Packed bed	Nonsubmerged and submerged trickling filter biological treatment units, depth filtration, membrane filtration, adsorption, ion exchange, air stripping, natural treatment systems
Fluidized bed	Fluidized bed reactors for aerobic and anaerobic biological treatment, upflow sludge blanket reactors, air stripping, thermal oxidation of sludge