... : dosing disinfecting,sludge cutting,inner flushing This SWCH type Holding tank also can be a sewage comming and disinfecting system regulated ... land, or transfer to a sewage treatment plant.The Holding tank has the function of dosing disinfecting,sludge cutting,inner flushing ... or shore connection.Simple structure, easy operation of the Holding Tank, which has been obtained the Certificate From CCS.