巻号一覧
31 巻 (1995)
- 3 号 p. 137-
- 2 号 p. 63-
- 1 号 p. 1-
31 巻, 2 号
選択された号の論文の8件中1～8を表示しています
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発生の経過と変遷その1八木 正一1995 年 31 巻 2 号 p. 63-73
発行日: 1995/06/15
公開日: 2010/02/26
ジャーナル フリーPDF形式でダウンロード (2692K) -
松下 和弘1995 年 31 巻 2 号 p. 75-81
発行日: 1995/06/15
公開日: 2010/02/26
ジャーナル フリーPDF形式でダウンロード (2682K) -
小橋 二夫, 東 禎三, 矢崎 仁也, 矢木 修身1995 年 31 巻 2 号 p. 83-87
発行日: 1995/06/15
公開日: 2010/02/26
ジャーナル フリーGrowth characteristics of Scenedesmus abundans were studied under various nutrient concentrations. Cultivation were carried at 27°C in a 14h light/10h dark cycle with cool-white fluorescent lamps at 3, 000lx. The removals of nitrogen and phosphorus in the medium were determined. In the nitrate culture media, nitrite was found during the algal growth. One mg/l cell growth of S. abundans needs7.2μ g-at/l (0.101mg/l) of nitrogen, and 0.677μg-at/1 (0.021mg/l) of phosphorus.抄録全体を表示PDF形式でダウンロード (482K) -
肥塚 利江, 渡辺 仁治1995 年 31 巻 2 号 p. 89-98
発行日: 1995/06/15
公開日: 2010/02/26
ジャーナル フリー1) 清浄な河川、高見川においては、多様な付着様式を持つ珪藻が存在するが、春季から夏季におこる剥離と他の藻類 (Homoeothrix janthina等の藍藻) との関係により、夏季から秋季に形成されたAchnanthes japonica群集が冬季にいたるまで保存される。しかし、冬季において、何らかの原因で剥離がおこる場合は、その限りではなく、直立伸長型の大型の種の優占度が高くなる。
2) 汚濁した河川、佐保川においては、出現する珪藻は、ほとんど滑走型のものであり、その組成は、剥離現象や珪藻以外の付着物の影響をあまり受けず、他の物理化学的要因 (水質等) により影響される事が多いと考えられる。
3) 珪藻による有機汚濁指数DAIpoは、清浄な河川、高見川においては、年間を通して高い値ではぼ一定であった。しかし、冬季に剥離が起こる場合、若干低い値となる可能性もあった。また、汚濁した河川、佐保川においては、冬季に高く、夏季に低くなる傾向が顕著であった。
藻類を用いた水質判定においては、夏の汚濁度は冬よりも大きいと判定され、その傾向は、自然河川の方が汚濁の進んだ都市河川より顕著であるといわれてきた4) 。しかし、今回のDAIpoを用いた判定結果では、この傾向は、汚濁河川の方に顕著であって自然河川では認められず、逆に冬に汚濁度が大きくなるように判定される可能性もあった。墨田5) は、北陸のいくつかの河川においてDAIpoの季節変化を調査した結果、夏に汚濁が進んだように判定されることもあれば、季節により変わらないこともあり、冬に汚濁が進んだように判定されることもあったことを報告している。本研究の結果より、珪藻組成は、どのような付着様式を持った藻類が出現し得るかにより、季節変化のパターンが変わることが示唆された。墨田のいう3パターンの季節変化は、このことに影響を受けている可能性もあり、今後の研究が必要であろう。抄録全体を表示PDF形式でダウンロード (952K) -
鄭 明淑, 徐 開欽, 稲森 悠平, 須藤 隆一1995 年 31 巻 2 号 p. 99-104
発行日: 1995/06/15
公開日: 2010/02/26
ジャーナル フリーIn order to clarify the effect of landfill leachate on water environment, algal assay procedure was conducted with several dilutions of a real leachate from a landfill site and the treated water of landfill leachate by the biological activated carbon fluidized bed process. Two kinds of freshwater algae, Selenastrum capricornutum and Microcystis aeruginosa, were used in this procedure. From the results obtained in this experimental study, it can be seen that the growth of S.capricornutum and M.aeruginosa was inhibited if undiluted solution of leachate was used; and if the EC50 was assumed as the dilution ratio of leachate, EC50 for the S. capricornutum and M.aeruginosa was 2.9% and 8.7%, respectively. In addition, the biological ac tivated carbon fluidized bed process was found to be an effective process to biodegrade the refractory organics and remove the hazardous materials in a landfill leachate.抄録全体を表示PDF形式でダウンロード (555K) -
丁 国際, 徐 開欽, 西村 修, 稲森 悠平, 須藤 隆一1995 年 31 巻 2 号 p. 105-115
発行日: 1995/06/15
公開日: 2010/02/26
ジャーナル フリーA survey of nematodes in drinking water treated by an advanced water treatment plant with biological treatment and granular activated carbon filter bed has been conducted for one year. Some nematodes with average 5.3%survival were observed in all samples from drinking water and the densities of nematodes seasonally fluctuated. Three genera 4 species were detected, but only two genera often appeared in which Plectus was abundant and Rhabditis was lesser. There was no relationship between rainfall and the densities of nematodes in drinking water. It was found that water temperature has a strong influence on the densities of nematodes. The species of nematodes in drinking water were much less than those in the water resource, which indicated that nematodes from the water resource were able to be removed by the water treatment facilities. On the other hand, the densities of nematodes in drinking water were much more than those in the water resource especially in the warmer seasons. It was suggested that some species like Plectus were able to breed within some treatment facilities, probably within the GAC filter.抄録全体を表示PDF形式でダウンロード (1165K) -
MASAHARU TADOKORO, TAKEHIKO OGAWA, TOSHIRO SAKURAI, SHIGERU OHNO1995 年 31 巻 2 号 p. 117-128
発行日: 1995/06/15
公開日: 2010/02/26
ジャーナル フリーExperimental investigations using the model reactors of both separation and aeration in the small-scale onsite wastewater treatment plant (SOWTP) was carried out in order to evaluate its malfunction for domestic use caused by glucosuria. When wastewater containing glucosuria was anaerobically digested, acid fermentation occurred, causing accumulation of volatile fatty acids (VFAs) at high concentrations. When the BOD loading was high, the VFAs generated were primarily malodorous propionic acid, butyric acid, and valeric acid. Therefore, the decreases in pH and the occurrence of a bad odor in the sedimentation-separation chamber (the primary treatment chamber) of SOWTPs are considered to be due to acid fermentation of glucosuria. Furthermore, when the anaerobic digestion effluent (the primary effluent) was treated with activated sludge at a BOD-SS loading of 0.31 kg/kg·day or less, the BOD removal efficiency was 93%or higher if DO was maintained at a high level. Therefore, the lack of air supply in the aeration chamber (the secondary treatment chamber) is considered to be a major cause of deterioration of the final effluent, and that quality of the final effluent is considered to be improved by a marked increase in the air supply.抄録全体を表示PDF形式でダウンロード (1010K) -
KEISUKE IWAHORI, SHIGERU TATSUTA, KOICHIRO YAMAKAWA, MASANORI FUJITA1995 年 31 巻 2 号 p. 129-136
発行日: 1995/06/15
公開日: 2010/02/26
ジャーナル フリーA simulation of the profiles of starch, its microbial metabolites, and dissolved oxygen in Aspergillus niger pellets formed by 5-day culture was carried out in order to assess the feasibility of starch wastewater treatment by fungal pellets. A higher oxygen permeability in the pellets was obtained with increasing pellet diameter, but glucose seemed to be accumulated inside the pellet under anaerobic conditions. However, effectiveness of the pellets was maintained at the high level when the bulk DO concentration was high. Since the substrate permeability of fungal pellets was superior to that of the bead immobilized by PVA-boric acid method, their highly effective treatment process of the starch wastewater was suggested to be feasible.抄録全体を表示PDF形式でダウンロード (719K)
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