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Ships' ballast water to ensure no load balance and stability of the ship, but it carries microorganisms will pose a serious threat to the ecological, economic and human health, and even the destruction of the entire ecosystem. Strong electric discharge method to produce hydroxyl radicals (· OH) tiny organisms in ballast water of ships have a very strong effect on killing. G8 and G9 guide developed by the International Maritime Organization (IMO) requirements of experiments during ship ballast water and microbial kill ballast water treatment, water quality and related chemicals were detected and analyzed. Experimental studies have shown that 10 tons / hour optimized 1:5 liquid-liquid mixing kill system works best. As a final experimental system for the design, installation and commissioning of the experimental equipment on board can provide more accurate experimental data. Experiments meet the D-2 standard, the water quality of measurement results showed that treatment simulated ballast water pH, salinity, conductivity is essentially the same; rise than particulate organic carbon dissolved organic carbon (DOC) (POC) decomposition of the amount to be slightly larger, resulting in a slight increase in the total organic carbon (TOC); experimental ballast water of high salinity, total dissolved particulate matter (TDS) is slightly reduced, low salinity will rise when the experiment rise; dissolved oxygen (DO), turbidity and total suspended particulate matter (TSS) drastically reduced, treated water quality has been greatly improved; redox potential (ORP) increased significantly, seawater oxidation enhanced. The study results showed that the ballast water in the treatment process produces a total residual oxidant (TRO) can decay. The initial stage of rapid decay rate decreased gradually, as time increases, the rate of decay, until attenuation totally. Main TRO attenuation factors is the length of the active particles of seawater with oxygen gas contact time, other chemicals in the water, organic carbon, natural synthesis of organic compounds and other organic matter; iron, ammonia and other inorganic materials; water quality seasonal variations also are important factors TRO decay rate. TRO concentration affect many factors, main TOC, bromine ion, pH, salinity, and chloride ions as well as in seawater such as ammonia. The influencing factors analysis results show that the TRO and bromine ion concentration, salinity, chloride ion concentration and ammonia in seawater is proportional to the pH, TOC is inversely proportional. · OH in the experimental system improved well kill the algae and bacteria in ballast water, have a significant role in the improvement of the water quality at the same time, do some preparation to be applied to industrial production in the future.
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