Advisory Council

From the comments we received, MegaRust 2010 was another success. San Diego is, of course, a wonderful setting. The fact that they were running their big marathon during the opening day was interesting for some and a bother for others. No one complains about the food, though–especially the food in Old Town, and particularly that wonderful neighborhood Greek Restaurant that seems to remain a national secret.

The Water Jetting workshop was held again this year. The attendance was disappointing, but in part this was due to the way in which the workshop was advertised. We promise to do better in getting the word out next time. The papers given in the sessions were considered quite useful, and some lively discussions ensued over some long standing disagreements on what surfaces should look like and how they should be cleaned. We’ve been hearing the same arguments for twenty-five years. Some one should invent a new line of thinking.

I hope to have a more complete run down on the meeting later in the month.

January 2003, a ban on the application of tributyltin TBT -based antifouling paints; and 1 January 2008 as the last date for having TBT-based antifouling paint on a vessel.

duct an independent international calibration of environment by mankind’ Goldberg, keynote adavailable alternative non-TBT marine coatings.

and 3 the cost benefits from the use of these waters, see papers published in the Proceedings coatings was estimated to be from $100 to $130 of the International Organotin Symposium of the million annually in fuel avoidance savings costs.

Paint Control Act of 1988′ OAPCA which was signed into United States law by President Reagan on 16 June 1988.

These new regulations, introduced in Jan-The first regulatory action in the UK to reduce uary 1987, reduced the maximum allowable tin the environmental impact of organotin comcontent of copolymer paints from 7.5 to 5.5% pounds from antifouling paint was announced by the Environment Minister in Parliament on 24 1986, which amended the Control of Pollution trol of Pollution anti-fouling paints Regulations.

These prohibited the retail sale and the supply for retail sale of antifouling paints containing a triorganotin compound as well as the wholesale and retail sale of anti-fouling treatments containing such a compound.

above interim measures were insufficient and that ‘a total ban on the use of TBT antifouling paints on all vessels including vessels engaged in international voyages should be introduced as soon as possible as an international agreement’.

MEPC agreed to request the IMO by the industry; but that the international traffic Council meeting in November 1999, for approval of large ships in Japanese waters is their main of ‘the holding of a 1-week diplomatic conference source of TBT pollution today.

This regulatory action lead to an intensive research effort to develop a treatment method for ship s wash water waste stream that could consistently remove TBT to levels below this discharge standard.

Coagulation studies have concentrated on evaluating the performance of two metal-salt coagulants and their ability to remove copper and zinc with the large amount of the particulate material that is typically present in shipyard wash waters.

The primary variables that control particulate material removal, and also the adsorption of adsorption-amenable organic compounds, are coagulation, pH and coagulant dose.

As an example, Figure 1 and 2 below show the typical effect of increasing coagulant dose and increasing pH, respectively, on the percent reduction of copper from Sample CV6.

The maximum percent removals observed were generally a function of the coagulation pH related to copper and zinc solubility.

In this series of tests the sample wash water (influent) was first treated by batch coagulation, the resultant flocculent removed, and the clarified supernatant (coagulated influent) fed into the process train.

Sample 1 was removed after the sample had passed through the sand filter, and Samples 2 and 3 were taken after the sample had passed through the respective activated carbon columns.

The purpose of the sand filter was to determine if additional removal of fine particulates from the sample could significantly reduce the copper and zinc levels.

A review of Table 4 indicates that on average, coagulation treatment was most effective, reducing copper and zinc levels to 86% and 72% their initial concentration, respectively.