Qingdao YIHUA environmental Protection Co., Ltd.

Municipal wastewater The typical urban sewage treatment process mainly includes mechanical treatment, biochemical treatment, sludge treatment and so on. The system consisting of mechanical and biochemical treatments is a secondary treatment system with BOD5 and SS removal rates of 90% to 98%. Treatment effect between a level and two levels of treatment in the middle is generally called the enhanced level one treatment, a half treatment or incomplete level two treatment, there are mainly high load biological treatment and chemical treatment of two categories, BOD5 removal rate up to 45%-75%. The secondary treatment system with biological phosphorus and nitrogen removal function is usually called deep secondary treatment. In order to remove specific su…

Industrial sewage treatment In the process of industrial wastewater treatment, the relevant water treatment personnel of enterprises need to master the key treatment technology, means and methods, and conduct in-depth analysis and discussion on the applicability and practicability of the treatment technology, so as to ensure the quality treatment of industrial wastewater and help the rapid development of enterprises. This paper introduces the current industrial sewage treatment technology, analyzes the existing problems of industrial sewage treatment, and puts forward the corresponding measures, which has made some contributions to the promotion and development of industrial sewage treatment technology for enterprises. Key words: industrial wastewate…

Medical Wastewater Treatment HHospital sewage, especially in infectious disease hospitals and tuberculosis hospitals, contains a variety of bacteria, viruses, parasitic worm eggs and some toxic and harmful substances in varying degrees. These germs, viruses and parasitic worm eggs have a certain resistance in the environment, and some survive in sewage for a long time. When people eat or contact the water or vegetables contaminated by bacteria, viruses, parasitic worm eggs and toxic and harmful substances, they will make people sick or cause the outbreak of infectious diseases. In recent years, cholera has occurred in many countries of the world, with unprecedented outbreaks and deaths, mostly in the coastal areas of underdeveloped countries, and has…

Sludge treatment technology The solid material separated or retained in the treatment of domestic sewage and industrial wastewater is called sludge. As a by-product of sewage treatment, sludge usually contains a large number of substances that are toxic, harmful or have a negative impact on the environment. It must be handled properly, or there will be secondary pollution. The solid substances in the sludge may already exist in the sewage, such as suspended substances trapped in various natural sedimentation tanks; It may also be formed in the process of sewage treatment, such as biological treatment and chemical treatment process, biological blood hoofs and suspended substances from the original dissolved substances and alternate substances transfor…

VOCs waste gas treatment VOCs is the abbreviation for volatile organic compounds. VOCs in the ordinary sense refer to volatile organic compounds; however, the definition in the environmental sense refers to the active type of volatile organic compounds, that is, the type of volatile organic compounds that can cause harm. This article introduces in detail seven main technologies of VOC waste gas treatment. 1. VOC waste gas treatment technology Thermal destruction method Thermal destruction method refers to the direct and auxiliary combustion of organic gas, that is, VOC, or the use of appropriate catalysts to accelerate the chemical reaction of VOC, and ultimately to reduce the concentration of organic matter, so that it is no longer harmful to a trea…