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Five Years of Rice Cultivation in Paddy Fields for Treated Water from Humus bioreactor-Type Rural Wastewater Treatment Plants

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Journal of Environmental Science and Engineering(B) 2021年第5期10卷 179-190页

作者： Hitoshi Ogawa Research Institute University of TamagawaTokyo 194-0041Japan

The treated sewage has a color as well as odor and is difficult to *** methods to reduce color with odor are costly and more difficult to *** the color and odor were reduced by pellet-type bioreactor sewage treatment using humus,rice was cultivated for 3 ***,3 years is sufficient to investigate the stability of treatment facilities,but when biological treatment is applied,5 to 10 years of investigation is *** addition,in rice cultivation,a similar 5 to 10 years survey is required to investigate the accumulation of low-concentration *** report is a five-year report and is the result of paddy rice cultivation in a stable wastewater treatment *** cultivated rice fully satisfied the edible standards and was able to obtain safe rice,and the effect of reducing fertilizer applied was obtained by using nitrogen and phosphorus from the treated *** addition,the yield was able to be within the range of the standard yield of 500 kg to 550 kg/1,000 m^(2).

关键词： Water reuse odor reduce color reduce bio-reactor rice production

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Rice Crop Application for Humus bioreactor by Rural Sewage System

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Journal of Environmental Science and Engineering(A) 2018年第8期7卷 301-312页

作者： Hitoshi Ogawa Research Institute University of TamagawaTokyo 194-0041Japan

In this paper, author will report on the process of rice cultivation in paddy fields using treated water which treated domestic sewage wastewater. Odor problems from sewage treatment plants have been solved by confinement and ventilation, but reducing the color and odor of treated water is economically difficult and is a subject of recycling of discharged water. Humus pellet bioreactors can be attached to existing sewage treatment plants to suppress the odor of the sewage treatment plants as a whole and to prevent sludge from deteriorating and to improve the quality of treated water. The odor and color of the treated water discharged from the sewage treatment plant was reduced. In addition, we were able to obtain performance of treated water with nitrogen 3 mg/L, phosphorus 1 mg/L or less throughout the year. On the other hand, there are many cases of results that cannot be used for paddy rice cultivation and vegetable production etc. by ignoring plant growth and physiology (fertilizer). For that reason, laws and guidance such as having to dilute more than 50 times in order to use processed water for agriculture are being conducted without learning. It is a case of using humus pellets in sewage treatment system and using deodorized wastewater of sewage by adjusting fertilizer when used in paddy field rice production.

关键词： Odor problem odor reduce humus pellet bio-reactor recycle water rice production

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