Tadanori Azuma

Proposal for Semi-permanent Extension of Engine Overhaul Interval Using Technology for Semi-permanent Use of Marine Engines and Lube Oil

ス,軸受,給排気系とその駆動系等々エンジン内部が 常にスラッジ≒0 で,エンジンは常に製造直後と同じ 様に,またはそれ以上に清浄な状態を clean engine と 呼ぶ.また,スラッジ≒0のLOとFOをclean LO/FO, これを実現している本技術を Clean LO/FO System と呼ぶ.本技術は省資源のため廃棄物≒0 の基本方針 で開発された技術の一つである. 結果,LO と FO を 清浄にするためのClean LO/FO System により,エン ジン内スラッジ≒0にした clean engineで前記の成果 を得た.エンジン半永久使用の条件は(1)半永久的に 摩耗≒0,(2)半永久的に熱効率ηth≒Const.であるが, 多くのデータからこの2条件を実現する原理はスラッ ジ≒0の clean engine である事を帰納的に発見した. 我々のClean LO/FO Systemは clean engine 即ち

Consideration on Measurement Methods and Estimation of Lub. oil Contamination for Marine Diesel Engines

In the conventional system of lubrication, lubricating oil is renewed with fresh oil after it is used for some period. Accordingly, waste oil is generated in the conventional system.The authors have developed a new system that makes it possible to use lubricating oil semi-permanently without oil renewal. In the new system, therefore, no waste oil is generated and it is enough to supply only a small amount of fresh oil sometimes to compensate for the lost oil. This system has been working well in about one thousand units of marine and cogeneration diesel engines in practice. The new system always keeps the lubricating oil clean as the kidney of animals kepps their blood always clean. This is why lubricating oil can be used semi-permanently and the new system is called kidney system. In our experience of the kidney system in practical use, we have come to know that there are some problems in the present methods of measurement and estimation of contamination of lubricating oil in marine diesel engines This paper reports about our study on measuring normal pentane insolubles and particles in used lubricating oil.

Removal of pesticides from wastewater at golf courses using plants (removal by mung beans; Phaseolus radiatus L).

Many studies have been done on the removal of pollutants from wastewater using aquatic plants. Water hyacinth has been the most widely-used plant, and systems using water hyacinth are well-established. These systems, however, have a few problems in their practical use. In a previous paper, we proposed a new system that could be used as a substitute for a conventional system or, as a secondary system to assist the conventional one. Mung beans will be used to remove pollutants in this system. In the previous experiment, the removal characteristics of nutrient salts such as NO2-, NO3-, NH4+ and phosphorus salts from wastewater in residential areas were examined. Mung beans exhibited good characteristics for removing these nutrient salts. At present, pesticides used at golf courses have become a severe environmental problem polluting water supplies. The purpose of this study was, therefore, to verify whether our new system using mung beans was also effective in removing pesticides from wastewater at golf courses. An experiment was conducted on seven different pesticides. They were three insecticides; Diazinon, Fenitrothion and Chlorpyrifos, three fungicides; Captan, Isoprothiolane and Chlorothalonil, and a herbicide; Simazine. The experimental results showed that, under experimental conditions, the pesticides were rapidly removed and that they exhibited no harmful effects on the growth of the mung beans. Mung beans may be used, therefore, to remove pesticides from wastewater at golf courses although further research is needed.

A Basic Study on Removal of Nutrient Salts in Wastewater Using Plants (Removal by Mung Beans; Phaseolus Radiatus L)

Many studies have reported on the removal of pollutants from wastewater using aquatic plants. The water hyacinth has been the most widely used and its system is the most well established. This system however, has a few problems in practical use. The purpose of this study is to obtain basic information on a new system that can substitute for a conventional system or be used as a secondary system to assist the conventional one. We first envisioned a model of this new system and then conducted a preliminary experiment using a small experimental unit to simulate the new system. The experiment showed that mung beans were a suitable plant for our study. Their removal rate of pollutants was the highest before they developed leaves and started photosynthesis. We found that nutrients were expelled outside the plant root when nutrient concentration inside the plant tissue became too high.