Optimization Of Swimming Poor Water Disinfection Technology Based Safety

As swimming has become a popular sport of common people in recent years, the swimming pool water quality is gaining more and more attention. In the meanwhile, the standards of water quality are getting strictly. Chlorination is a common practice of most swimming pools disinfected. The presence of various organic matters in the swimming pool water will lead to the disinfectants by products(DBPs), such as THMs, halogen acid, in the water and these DBPs will increasing the health risks of swimmers. As organic matter is a precursor of chlorine DBPs, the research of reducing the content of organic matter by optimizing the swimming pool water treatment processes to ensure the safety of the swimming pool water quality has very important significance and practical value.Compared with drinking water, a wide variety of organic species are presence in the swimming pool water which coming from multiple sources, such as the natural organic matter coming from the water supplements and other organic matters carried into the swimming pool by swimmers, for example: metabolites(urea contained), personal care products and so on. These organic matters have complex compositions and persistent presence in water. In the revision of the swimming pool water quality standards, it is expected to choice an item of parameter that can accurately reflect the amount of organic matter in water and can be used for running monitored easily. So, the subject research selects COD, TOC, urea and UV254 as characteristic index of organic matters and the relationship between them are discussed. Through the analysis of the correlation of the indexes which are put into the water or put out the water in each phase of the technology process, it can be sure that TOC and urea have a good correlation in the water quality conditions under the studied. It is considered that the substitutability of these two can be accepted as an operation monitoring indexes.According to the national standard, the turbidity of pool water should be belower than 1 NTU. Comparied with this value the measurement error is quite larger, if we only use the turbidity to reflect the treatment effect, it is difficult to obtain the actual water quality accurately. In the research, it is tried to make the analysis of comparing the particle counting and turbidity in water in order to determine a more accurate monitoring method.According to “The swimming pool water supply and drainage engineering technical specification”, the circulation purification processing system of the pool water is mainly filtration(clarify) and disinfection technology. Filtration is designed to remove the suspended and colloidal particles in water so that the water can be clarified. Filter media are mainly granular filter material and diatomite. Some of the organic matters in the water is attached to the suspended particles, so the filter(clarify) will also produce a certain removal effect on the organic matters in the water. Under the condition of ensuring the clarification effects of water quality, if the filtration technology can be optimized aimed as the organic matter removal rate raised, it will reduced the DBPs concentration and improve the safety of the pool water quality. In term of this, the subject mainly investigates the effect of the existing sand filtration technology and diatomite filtration on the removal of organic matter through the field test in the actual swimming pool. By adjusting the operating parameters of the technology, we can analyze the factors affecting the removal rate of organic matter, and determine the range of parameters that consider improving the removal rate of organic matters as the goal. The result shows that for the quartz sand filtration, reducing filter speed and adding flocculants can improve the removal rate of organic matter; while the dosage of pre coated diatomite and filter speed are the main factors affecting the effect of diatomite filtration.Based on investigation for domestic swimming pool, now most of the regular water treatment processes have less effect on the urea removal. The laboratory tests by simulated water have been carried out in order to studies the removal characteristics of the activated carbon technology and biological activated carbon for the urea. The test results show that the removal rate of biological activated carbon technology to the urea is 77.2%, which is obviously better than that of the ordinary activated carbon technology. At the same time, the topic preliminarily discusses the affecting factors that the biological activated carbon removes the urea.