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
평형수 관리협약
(BWM Convention 2004)
협약 원명 : International Convention for the Control and Management of Ship's Ballast Water and Sediments, 2004(선박의 평형수 및 침전물의 제어 및 관리에 관한 국제협약)
협약 채택 : 2004년 2월 13일
협약 발효 : 미발효(30개국 이상 비준하고 비준국의 세계선복량이 35% 이상일 때로부터 12개
II. How is CBM formed
Coalbed methane (CH4) forms in one of two ways. During the earliest stage of coalification (the process that turns plant detritus into coal), biogenic methane is generated as a by-product of bacterial respiration. Aerobic bacteria (those that use oxygen in respiration) first metabolize any free oxygen left in the plant remains and the surrounding sediments. In fresh water
달하므로 저류조의 용량이 조기에 포화됨.
-Interrupt emission of rainwater in retaining facility, as flow rate is enough by precipitation
2.Sedimentation of retaining facility
-The longer operating time is, the more sediment is piled up. So function is declined.
3.Non-point source
-Because rainwater isn’t pass the retaining facility and is inpoured, pollutions are expect.