巻号一覧
33 巻 (1997)
- 4 号 p. 179-
- 3 号 p. 97-
- 2 号 p. 47-
- 1 号 p. 1-
33 巻, 3 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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尾崎 保夫1997 年 33 巻 3 号 p. 97-107
発行日: 1997/09/15
公開日: 2010/02/26
ジャーナル フリーPDF形式でダウンロード (7168K) -
山本 満寿夫, 中本 信忠1997 年 33 巻 3 号 p. 109-116
発行日: 1997/09/15
公開日: 2010/02/26
ジャーナル フリーThis research was carried out to appreciate a slow sand filtration treatment by an investigation of suspended matter distribution in sand beds of Ishifune and Someya slow sand filters. The core-sampler was inserted to take suspended matter in slow sand filter beds during the filter operation when the filters were easy to clog in winter. The following results were obtained.
From the depth distribution of the Total Organic Carbon, Someya slow sand filter detained larger amount of suspended matter than Ishifune slow sand filter. And suspended matter was detained until deeper layer of the sand column at Someya water works.
The depth distribution of the Chl/SAND indicated the nearly same profile as TOC distribution.Pheophytin content in the sand column at Someya water works was several times larger at the deeper layer in the sand columns than Ishifune slow sand filter. From the depth distribution of the Chl/TOC ratio, Someya slow sand filter suggested that algae which had brought by inflow water at early times of filter run detained at the upper sand layer. Total cells number of the algae in the sand columns at Someya slow sand filter were from sevral to ten times higher than Ishifune slow sand filter.抄録全体を表示PDF形式でダウンロード (757K) -
中本 信忠, 池田 大介, 田口 香代, 山本 満寿夫1997 年 33 巻 3 号 p. 117-125
発行日: 1997/09/15
公開日: 2010/02/26
ジャーナル フリーThe differences of algal mat development on the slow sand filter beds in shallow ponds (110 cm depth) and in deep ponds (171 cm depth) were studied at Wakata water works, Takasaki city. The algal mat development in shallow ponds was high growth rate and marked a high standing mass. This was remarkable in summer. Decrease of algal biomass was observed after the peak biomass on 10 days in shallow ponds. It was estimated that this decrease was caused by the grazing of Chironomidae larvae. Colony size of the length of filamentous diatom of Melosira was measured to evaluate the health condition of diatom. Empty shells and small numbers of cology were abundant in deep filter beds. And chlorophyll a content to total pigments of algal mat in shallow ponds was higher than that in deep ponds. It seems that active growth of filamentous diatom in a shallow filter pond keeps an aerobic condition in the filter bed.抄録全体を表示PDF形式でダウンロード (942K) -
山本 鎔子, 坂田 智絵, 落合 正宏1997 年 33 巻 3 号 p. 127-135
発行日: 1997/09/15
公開日: 2010/02/26
ジャーナル フリーTen strains of myxobacteria were isolated from eutrophic lakes, which were identified as Myxococcus. They contained geosmin in the cell and excreted it in the growth medium. These observations suggest that myxobacteria are the cause of the earthy odour of the eutrophic lakes.抄録全体を表示PDF形式でダウンロード (3371K) -
平石 明, 上田 陽子1997 年 33 巻 3 号 p. 137-149
発行日: 1997/09/15
公開日: 2010/02/26
ジャーナル フリーWe studied microbial population shifts in laboratory-scale synthetic-waste activated sludge from plant-scale sewage sludge on the basis of respiratory quinone profiles. The laboratory sludge reactors were seeded with the sewage sludge and operated on a fill-and-draw basis in a 24 h batch cycle with either raw domestic sewage or each of three different synthetic wastewaters containing acetate, glucose, skim milk, and/or peptone as a primary component. After two months of acclimation, the quinone compositions of the laboratory sludges were analyzed compared with the seed sludge. Numerical analysis of quinone profiles showed that there was no significant difference in population structures between the seed sludge and the laboratory sludge loaded with raw sewage, while significant population shifts occurred in the three synthetic-waste laboratory sludges. These results suggest that laboratory activated sludge loaded with synthetic wastewater can not be regarded as a model of plant-scale sewage sludge in their microbiological aspects.抄録全体を表示PDF形式でダウンロード (1520K) -
平石 明1997 年 33 巻 3 号 p. 151-160
発行日: 1997/09/15
公開日: 2010/02/26
ジャーナル フリーThe predominant methanogens in an anaerobic wstewater treatment plant were studied by using a molecular technique without isolation and cultivation. The 16S rRNA genes from the bulk DNA of the anaerobic sludge were amplified by PCR, cloned, and reamplified. Of 30 clones isolated and tested, 24 clones contained a 16S rDNA insert. These positive clones were divided into four ribotypes on the basis of restriction fragment length polymorphism (RFLP) patterns with Hae III. The RFLP pattern of the most abundant ribotype (designated ribotype 1) was almost the same as that of Methanosaeta soehngenii which was computer-predicted and/or experimentally obtained. This was also supported by the results of RFLP analyses with HhaI and SmaI. Phylogenetic trees for methanogens was constructed on the basis of 16S rDNA sequences and 16S rDNA-RFLP patterns. Although there were some differences in branching patterns between the two trees, the RFLP-based tree was suggested to be used roughly as a model showing natural phylogenetic relationships among methanogens. The results of this studyshow that 16S rDNA-KELP analysis with PCR cloning has a promise to identify the predominant methanogens in anaerobic wastewater treatment systems.抄録全体を表示PDF形式でダウンロード (1079K) -
古川 憲治, 藤田 正憲, 重村 浩之1997 年 33 巻 3 号 p. 161-170
発行日: 1997/09/15
公開日: 2010/02/26
ジャーナル フリーFor the purification of urban river water polluted with grey water, a new method applying various kinds of contact materials and aquatic plant as nutrient absorber was invented and its purification capabilities were experimentally made clear. Actual purification plant, whose working volume was 26.4m3, was consisted of contact oxidation tanks and aquatic plant cultivation tank. Oxidation tanks were composed of wavy contact material and porous concrete block. Water lettuce (Pistia stratiotes) was cultivated in an aquatic plant cultivation tank. This purification plant was continuously operated under TOC loading rate of 50-170g/m3/d. TOC was removed at the efficiencies of about 40% and SS and anionic surfactants were effectively removed. Cultivation of water lettuce was succeeded by using the effluent from contact oxidation tank. 30kg (wet weight) of water lettuce were harvested from aquatic plant cultivation tank whose cultivation area was only 2.16m2. Purification of polluted river water using contact materials and aquatic plant was experimentally proved to have a high application potential.抄録全体を表示PDF形式でダウンロード (7266K) -
児島 正幸, 渡辺 仁治1997 年 33 巻 3 号 p. 171-178
発行日: 1997/09/15
公開日: 2010/02/26
ジャーナル フリー1. 四国吉野川水系の有機汚濁の状況を、付着珪藻群集を指標とした汚濁指数 (DAIpo) を用いて数量評価し、吉野川の汚濁の現状を把握すると共に、汚濁機構を検討した。
2. 調査は1996年9月、10月と1997年2月に行った。旧吉野川を含む本流では、20地点・支流10地点、計30地点で、一定の条件で試料採集を行った。
3. 出現した珪藻は102種であり、各調査地点毎に珪藻群集の組成に基ずくDAIpo値を求め、汚染地図を作製した。その結果、吉野川を次の3水域に区分することができた。
(1) 池田ダム湖より上流のDAIpo80以上の清浄水域、RPID=81
(2) 池田ダムから、site17までのDAIpo70台の中流清浄域、PRID=72
(3) 下流部のDAIpo70以下の汚濁水域RPID=60、抄録全体を表示PDF形式でダウンロード (797K)
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