ブックタイトルMGH移動脱水車カタログ（英語版）

概要

MGH移動脱水車カタログ（英語版）

e flow of sewage treatment ( the present situation in taiwan ) ①Settling basin ③Final　sedimentation　tank④Disinfection　equipment⑤Sludge　thickener⑥Dehydrator⑦Incinerator⑧Iincinerated ash②Primary　sedimentation　tankRemove sand easy to settle and solid waste of large size by screens.Wash the sand which has settled at the bottom of the tank and fill up on the landfilldisposal site. Incinerate most of the waste such as sanitary paper and vegetablescraps gathered by screens and fill up the other trash.Again precipitate the supernatant of the primary sedimentation tank slowly.Precipitated sludge is sent to the dehydrator, the supernatant is sent to thedisinfection equipment.Precipitated sludge is dehydrated, the supernatant is sent to the disinfection equipment.Incinerated ash is reused and recycled. The rest is landfilled.While make efforts to decrease the quantity of sludge generated every day, use thesludge as a resource.Disinfect by injecting chemicals.Bacteria that are in treated sewage is usually harmless to the human body. Disinfect inorder to enhance the safety of the final effluent. Indisinfection, Chlorination using thebactericidal action of chlorine is often used. In the other methods, the bromine, theozone, and the ultraviolet disinfection are used.Mix flocculants and reduce water further squeezed by machine.Belt press dedehydrators and centrifugal dehydrators are often used. First one, whichput sludge between two sheets of cloth, and squeeze out water by applying pressurefrom both sides. Second one, in the same principle as the spindrier of the laundry, putsludge into the tank and collect water on the outside by the rotation.Reduce the volume by incineration at high temperatures. Organic matter isburned and stabilize.You can also perform the area-wide air conditioning business using the waste heat ofsludge incinerators. In addition, the temperature of sewage is lower than the air insummer, and higher in winter. By making use of that characteristic, some areas dobusiness of the cooling-and-heating.Reduce the volume of the sludge in the same tank as the sedimentation tank.Just only 0.5～1 percent of precipitated sludge in sewage treatment facilies is sludge(solid materials) , that contains a lot of water, so it is necessary to reduce water. Thereare the following on its way. Gravity thickening, which using the fact that sludge is alittle heavier than water. Centrifugal thickening, which using the centrifugal force suchas a spin dryer. Flotational thickening, which combine air and bubbles and sluge withchemicals to make sludge float up.Make a gentle flow of sewage, then precipitate small insoluble dirt slowly. Theprecipitated sluge is sent to the sluge thickener, and the supernatant is sent tothe final sedimentation tank.In sewage treatment facilities, unpleasant smells may drift from various places. Inplaces where the odor is easy to get, equipments are required to seal or to remove thesmell (deodorization system). There are the following deodorization methods; theactivated carbon deodorization, in which activated charcoal adsorbs odors; thebiological deodorization, in which microorganisms eat the smell; the incinerationdeodrization, in which gather and burn smelly air in the sludge tank.