In addition to organic matter, sludge usually contains 20% to 30% of inorganic matter, mainly calcium, silicon, iron, and aluminum. The construction of sludge is an effective method to make full use of inorganic matter in sludge. In 1997, a company produced high-strength cement using sewage sludge and waste incineration fly ash as the main […]
1. Overview of sludge treatment and disposal In the treatment of feed water and wastewater, various types of sediments and floating materials produced by different sludge treatment processes are collectively referred to as sludge. The composition and properties of the sludge mainly depend on the composition, properties and treatment process of the treated water. The […]
Metallurgical dust The main components of metallurgical dust are gas dust, gas mud, steel-making dust and so on. Blast furnace dust The blast furnace dust mainly refers to the metal vapor captured by the dust collector in the metallurgical operation, such as the raw material dust generated along with the blast furnace gas movement, the […]
In recent years, soil heavy metal detection technology has been developed rapidly, but there is still a big gap with the actual demand, and there is a huge room for improvement in some key technologies. The spectral method can be used to analyze and determine the heavy metal content in various complex environmental samples with […]
In addition to organic matter, sludge usually contains 20% to 30% of inorganic substances, mainly calcium, silicon, iron and aluminum. Sludge building materials are an effective method for making full use of inorganic substances in sludge. The research team incorporated 10% to 30% of the sewage sludge into clay bricks and burned it into an […]
At present, the main disposal methods commonly used for sludge are sanitary landfill, incineration treatment, direct land use, etc. These disposal methods have played a certain role in practical applications, but as environmental standards become more stringent, their problems Exposed. 1. Sanitary landfill The sanitary landfill of sludge began in the 1960s and has developed […]
Municipal sewage sludge is solid, semi-solid and liquid waste generated in the sewage treatment process. The sludge composition is complex, including solid particles such as fibers, sediments and animal and plant residues mixed into domestic sewage or industrial wastewater. A solid substance of coagulated flocs, various colloids, organic matter, and adsorbed metal elements, germs, microorganisms, […]
The resource utilization after the sludge has been paid more and more attention as people pay more attention to sustainable economic development. In recent years, with the development of China’s economy and the continuous advancement of urbanization, urban sludge production has gradually increased. The traditional methods are sludge landfill, sludge farming and sludge incineration. After […]
At present, there are three main forms of industrial waste heat utilization. The first one is waste heat boiler to recover waste heat steam for process use of saturated steam or for power generation; the second is to use heat pump or lithium bromide absorption unit to recover waste heat and make hot water or […]
At present, there are two current situations of filtrate treatment in China: 1. Serious shortage of investment funds At present, the total investment in the leachate treatment system of more than 70 waste treatment plants is about 400-500 million yuan, which can not be compared with the investment in urban sewage treatment of hundreds of […]