Need. According to the query safety management network, the operators of sludge discharge equipment in water plants must undergo professional and safety technical training of this type of work, pass the examination and obtain the operation qualification certificate before they can take up their posts with certificates, so the operators of sludge discharge equipment in water plants need to take up their posts with certificates. A certificate holder refers to an employee who has the corresponding title or certificate of a certain post and can fully explain his ability and qualification.