Recent Patents on Chemical Engineering - Volume 6, Issue 2, 2013

The concerns on increasing awareness for systems development to improve water quality of effluents from wastewater treatment and industrial facilities have provided incentives to develop new technologies and improve performance of current technologies. In this paper, the patents on achievements of industrial wastewater treatment by wet oxidation (WO) and catalytic wet oxidation (CWO) processes during the period f Read More

Water shortage in the world has stimulated the rapid development of water treatment technology. As one of the most promising technologies, membrane separation has tremendous hopes in producing fresh water and dealing with wastewater. The blend of inorganic component into polymer membrane has become an efficient way to increase the antifouling property and realize the multifunction of polymer membran Read More

A novel configuration for fluidized bed has been developed. It is basically a bubbling fluidized bed furnished with a spouted jet in the upper part of the bed. A part of gases is fed through the distributor to fluidize bed solids. The remaining part is fed through a vertical pipe creating a jet-fountain zone. A distinct feature of the novel configuration different from previous spouted bed patents and configurations is that the jet spout he Read More

Physical separation methods, especially membrane technology, can be a good substitute for biological wastewater treatment, due to its simple constructions and operations. There are many papers and patents in this field. Membranes need to be cleaned periodically to be able to operate economically, and need to be replaced after a while. Several factors can influence the membrane cleaning procedure, including pressur Read More

Membrane technology has been widely used in gas separation, material separation and water treatment as a new separation technology. Membrane technology increasingly shows its important role and a bright future. This paper focused on membrane technology and apparatus, and reviewed achievements on patents of wastewater treatment by membrane technology, which contains nanofiltration (NF), ultrafiltration Read More

Acrylonitrile is widely used in chemical industry, mainly as raw materials to obtain acrylic fiber, nitrile rubber, ABS plastic and synthetic resins. However in the course of its production and uses, much colored organic wastewater will be released. Reducing COD and toxicity presents a challenge for the treatment. This paper focused on the introduction of acrylonitrile wastewater process and commented on patents of a Read More

High level of nitrogen pollutants was found to be the reason of eutrophication and have harmful effects on human health. Therefore, the nitrogen removal is obligatory from the environmental protection view. Several methods have been proposed to remove nitrogen compounds from wastewater. These methods can be classified as (I) biochemical and (II) physical treatment. So, making an assessment on nitrogen remo Read More