What is sludge tank in ship?
What is sludge tank in ship?
marine. A tank provided to receive oily residues coming from the oily water filtering or separating equipment and from the purification of fuel and lubricating oils. The sludge tank should be easy to empty and inspect.
Under what regulation of Marpol 73 78 of Annex 1 is the oil record book?
regulation 17
The following pages of this section show a comprehensive list of items of machinery space operations which are, when appropriate, to be recorded in the Oil Record Book Part I in accordance with regulation 17 of Annex I of the International Convention for the Prevention of Pollution from Ships, 1973, as modified by the …
What is bilge holding tank?
5.4 Oily bilge water holding tanks are tanks collecting oily bilge water prior to its discharge, transfer or disposal. incineration; or • inert gas systems with appropriate oil residue (sludge) processing systems.
What is the minimum capacity requirement of sludge tank?
3 For ships which carry ballast water in fuel oil tanks, the minimum sludge tank capacity (V2) should be calculated by the following formula: V2 = V1 + K2B( m3) where: V1 = sludge tank capacity specified in .
What is BSO tank?
B.S.O. Tank. Bilge Separator Oil Tank. 14. W.O.S. Tank Waste Oil Settling Tank.
What is Annex 2 Marpol?
MARPOL 73/78 Annex II, Regulations for the Control of Pollution by Noxious Liquid Substances in Bulk. The main principle of Annex II is to dilute cargo residues in seawater to prescribed limits depending on their pollution hazard and facilitate the distribution of discharges by utilising the wake of the ship.
What is slop tank?
Slop tanks are the focal point of the Load-On-Top system used on crude oil tankers to prevent pollution of the sea. Design of these tanks and their operating procedures strongly affect the degree of oil-water separation achieved.
How do you calculate slop tank capacity?
The slop tanks capacity are to be 3% of the total oil carrying capacity of the vessel. It may be reduced to 2% of the tank washing arrangements are such that once the tanks are charged the water is sufficient for washing and to provided drive for educators, 2% where CBT and SBT are provided.
What is the SDI of activated sludge?
Sludge Density Index (SDI) So far we have covered attached growth and fixed film types of wastewater treatment. The activated sludge process uses a suspended growth of organisms to remove BOD and suspended solids. As shown below, the process requires an aeration tank and a settling tank.
What does sludge mean in STP?
In STP, sludge means the following. • Primary sludge – When raw sewage is settled in a primary clarifier, the suspended solids settle down by gravity. These are drawn out from the conical floor of the clarifier. This is called primary sludge (PS).
How do you calculate hydraulic retention time in Blackwater?
Blackwater Volumetric Flow Rates According to several studies, the hydraulic retention time (HRT) of ten hours is accurate and can be used to calculate the volume of the two tanks needed. = Q * HRT V=10.83 [L/hr] * 10 [hr] V= 108.3 [L]
What is the difference between trickling filter and activated sludge process?
The activated sludge process generally removes more BOD than the trickling filter. Typically the trickling filter will remove 80 to 85% of the influent BOD. The activated sludge process will often remove 85 to 95% of the BOD from the aeration influent. Activated sludge processes may or may not follow primary treatment.
