Sewage treatment apparatus专利检索-活性污泥水处理专利检索查询-专利查询网

Sewage treatment apparatus

阅读：354发布：2024-01-09

专利汇可以提供Sewage treatment apparatus专利检索，专利查询，专利分析的服务。并且A sewage treatment package plant receives incoming raw sewage and purifies it by performing an activated sludge process thereon. Oxygen for re-aeration of sludge in the stabilization and digestion stages of the process is supplied directly from aerated sewage in the aeration stage. The plant is of unitary structure and includes partition means to subdivide the interior into separate aeration, stabilization and sedimentation chambers with a separate digestion cavity being defined beneath the stabilization chamber. The sedimentation chamber has a volume sufficiently large to fully absorb the effects of shock loadings. Means are included for directing aerated sewage directly from the aeration chamber into the stabilization chamber and digestion cavity for re-aeration of the sludge.，下面是Sewage treatment apparatus专利的具体信息内容。

权利要求

1. A sewage treatment apparatus of unitary and compact structure for receiving raw sewage and performing an activated sludge process thereon comprising: a. an outer container defining an enclosure therewith; b. means defining an inner aeration chamber inside the outer container, the inner chamber being positioned adjacent the top of the container; c. means separating the interior of the container into two additional chambers, a sedimentation chamber surrounding the inner chamber and a stabilization chamber below the aeration and sedimentation chambers; d. means defining a vertical passage opening at its lower end in the stabilization chamber and opening at its upper end adjacent the top of the inner chamber; e. means defining openings between the inner chamber and the stabilization chamber; f. means defining passages between the inner chamber and the surrounding sedimentation chamber; g. means defining openings to the atmosphere from the inner chamber; h. means defining an opening between the bottom of the sedimentation chamber and the stabilization chamber; i. means directing raw sewage directly into the inner chamber; j. an outlet pipe extending into the sedimentation chamber adjacent the top of the container to maintain the level of liquid in the container at a predetermined level; k. means for agitating the sewage in the inner chamber to introduce air into the liquid; l. pump means for circulating sewage from the aeration chamber into the stabilization chamber through said opening defining means and back into the aeration chamber through said vertical passage; and m. a skirt extending downwardly into the stabilization chamber for shielding the opening between the sedimentation chamber and the stabilization chamber from agitation by the pump means.

2. The apparatus of claim 1 wherein the means for defining passages from the inner chamber into the sedimentation chamber includes tube means communicating between the aeration and sedimentation chambers and being situated substantially below the surface of sewage in the aeration chamber so that undigested fats do not enter the sedimentation chamber.

3. The apparatus of claim 1, further comprising means for removing excess sludge from the bottom of the container.

4. The apparatus of claim 1, wherein the means defining an opening from the sedimentation chamber into the stabilization chamber includes an annular apron integral with the means defining the inner chamber, the apron defining an annular passage between the outer edge of the apron and the wall of the outer container, the annular passage providing liquid flow communication between the sedimentation and stabilization chambers, the effective area of the passage being substantially less than the mean cross-sectional area of the sedimentation chamber in a direction normal to the inner container sidewall.

5. Apparatus of claim 1 wherein the agitation means and pump means comprise a common drive source.

6. Apparatus of claim 5 wherein the common drive source includes a motor having a shaft extending through said vertical passage, impeller means mounted on the shaft below the passage for urging fluid flow upwardly through the passage, and fan means mounted on the shaft slightly below said predetermined liquid level for drawing air into the liquid, the skirt extending below the level of the impeller.

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