PULP AND PAPER
While the pulp and paper industry has made great strides in reducing and recycling waste over the last 20 years, large quantities of water are used in pulp and paper production and the industry continues to generate large amounts of wastewater. Mixing is a critical element of the wastewater treatment process which, while similar in some respects to municipal wastewater treatment in the methods employed, involves treating contaminants that are unique to the industry and pose significant hazards to the ecology of receiving waters if not sufficiently treated prior to discharge.
Thorough mixing is also necessary for a broad range of pulp and paper processing applications such as blending pulp stocks, adding chemicals, and providing stock consistency, where efficient bottom-up mixing provides enhanced process control and lowers operating costs.
The importance of introducing an alternative source of fuel has spurred the development of numerous innovative technologies. Most biofuels are derived from the harvesting of organic matter and are later converted to fuel. However, the price of these fuels has increased and their production has had an unintended adverse impact on food crops. For this reason, much of the focus on biofuel production recently has been on alga culture, which offers great promise in higher yield per unit volume of feed stock and does not interrupt other agricultural supply chains.
While research and development of alga culture is in its early stages there are competing approaches vying for the lead in this potentially huge market. It is readily apparent that highly-efficient mixing will be essential to production, because uniform consistency of feed stock must be maintained in all cases. Furthermore, efficiency in all aspects of production will be critical in minimizing costs, which will be necessary in order to compete with fossil fuels on price.
The accumulation of wastewater from agricultural and food processing is considered to be biodegradable and nontoxic, but contains high concentrations of suspended solids and biochemical oxygen demand. The concentrations of these contaminants are 500 times greater than those that are found in municipal wastewater plants.
Mixing requirements in the food processing industry are so varied that many different types of mixers are needed. EnviroMix provides exceptionally fast and low-cost mixing in applications requiring low shear/no shear processing and where complete drainage of mixing vessels is important.
The organic chemicals manufacturing sector has one of the highest discharge rates among all industrial groups; these include pharmaceuticals, pesticides, and plastics. In order to meet higher standards of industrial wastewater treatment we need to enhance old traditional methods with a newly proven and efficient technology.
Thorough mixing in a reactor is essential to the chemical manufacturing process, and is also an important factor in pollution prevention. EnviroMix provides bottom-up mixing to ensure uniformity of product and minimal waste in back-mix reactors of any size or configuration. Other applications in this industry include mixing of feed stocks and mixing for product storage tanks/containers.