Sharp Kabushiki Kaisha Corporation

Kazumi Chujo

Kazuyuki Yamasaki

Seiji Okamoto

Hiroyuki Ishibashi

Yukihiro Tao

Norio Sawai

This metal containing waste water treatment method introduces a metal containing waste water from above into a submerged membrane separation tankin which a reaction section, a submerged membrane sectionhaving a submerged membraneand a precipitation sectionare arranged in order from top to bottom, causes a reaction by adding a pH adjuster to the reaction section, subsequently separates water from metal by the submerged membraneof the submerged membrane sectionand subsequently precipitates and concentrates the metal in the precipitation section. As described above, according to this treatment method, the pH adjuster is added to the reaction section, and therefore, solid-liquid separation can be effected by the submerged membranewith a hydroxide formed. Moreover, the metal can be precipitated and concentrated by the action of gravity without using energy in the precipitation section

Metal containing waste water treatment method and metal containing waste water treatment equipment

According to this wastewater treatment apparatus, wastewater can be treated by novel action by a foaming tank in comparison with a treatment method solely using a biological treatment tank constituting an aeration tank. That is, wastewater can be treated by action achieved by combining (1) action solely of a biological treatment tank and (2) action of a foaming tank . Specific action in this foaming tank includes supply of dissolved oxygen to wastewater and oxidation by bubbled air (micro air) under a favorable condition with a shallow water depth. According to this wastewater treatment apparatus, energy to be consumed can be saved and toxic chemical substances such as dimethylformamide as a toxic chemical substance can be completely decomposed by unlimited microorganisms.

Wastewater treatment method and apparatus

In this waste-water treatment system, solids suspended in waste water are attached to a radial ring-shaped thread structure filled in an attachment filter tank . Then, particle sizes are increased and the attached solids are further made to be anaerobic, digested and reduced. Then, sludge generated from the suspended solids is sedimented, separated and removed in a sedimentation section in the same attachment filter tank . In this waste-water treatment system, solids suspended in waste water can be filtered without consuming a large amount of electrical energy. Thus, energy can be saved and waste can be reduced.

System for waste water treatment capable of saving energy and reducing suspended solids

In this neutralizing apparatus, aerobic microorganisms are propagated on a vinylidene chloride packing material provided in a neutralization tank . The aerobic microorganisms produce nitric acid ions from organic alkaline wastewater introduced from a raw water tank and thereby the organic alkaline wastewater is neutralized. Thus, various kinds of alkaline wastewater can be neutralized without using a mineral acid as a poison such as hydrochloric acid or the like.

Method and apparatus for neutralizing alkaline wastewater without using mineral acids

An apparatus for treatment of fluorine waste water has an introduction tank, a main treatment tank, a calcium hydroxide tank, a polychlorinated aluminum tank, a macromolecular flocculant tank, a settling tank, and a concentration tank. Fluorine waste water is introduced through the introduction tank into a lower part of the main treatment tank through a lower inlet pipe. Also, return sludge from the concentration tank and silicon sludge from a silicon waste water treatment system are introduced into an upper part of the main treatment tank. Thus, silicon recovered from silicon waste water is recycled for treatment of fluorine waste water. Also, unreacted chemicals, which have been loaded in the calcium hydroxide tank, polychlorinated aluminum tank, macromolecular flocculant tank, are recycled. The main treatment tank has no stirrer, and thus conserves electrical energy, but can neutralize the waste water.

Waste water treatment method

An apparatus for treatment of fluorine waste water has an introduction tank, a main treatment tank, a calcium hydroxide tank, a polychlorinated aluminum tank, a macromolecular flocculant tank, a settling tank, and a concentration tank. Fluorine waste water is introduced from the introduction tank into a lower part of the main treatment tank through a lower inlet pipe. Also, return sludge from the concentration tank and silicon sludge from a silicon waste water treatment system are introduced into an upper part of the main treatment tank. Thus, silicon recovered from silicon waste water is recycled for treatment of fluorine waste water. Also, unreacted chemicals, which have been loaded in the calcium hydroxide tank, polychlorinated aluminum tank, macromolecular flocculant tank, are recycled. The main treatment tank has no stirrer and thus conserves electrical energy, but can still neutralize the waste water.

Waste water treatment apparatus

In a waste water treatment apparatus, sludge settled in a settling tank is treated by being introduced (returned) into a return sludge reaction tank having a settling section in its rear portion. Therefore, unreacted chemicals contained in the sludge that has settled in the settling tank can be utilized in the return sludge reaction tank. Therefore, the unreacted chemicals are not discharged as sludge. Accordingly, as compared with the conventional treatment method of discharging a sludge from the settling tank, it is possible to reduce the amount of generated sludge remarkably and consequently, reduce a sludge disposal fee, the use amount of slaked lime, and a running cost such as maintenance cost of a dehydrator.

Growing community of inventors

Ayauta-gun, Japan

Kazumi Chujo