Application of MEMMERT products in paper industry

Handmade paper has its origins in China. It has been almost 2,000 years since modern mechanized papermaking. The modern papermaking industry is developing rapidly, and the speed of papermaking is getting faster and faster, which can reach 2000 meters / minute or 1000 tons / day, but the idea of ​​papermaking has basically not changed. Water is still an important raw material and an essential raw material for processing fibers, but It will also affect the paper quality. Paper can breathe, it can absorb or release water according to the environment. Paper that is too wet or absorbs moisture during storage will be detrimental to printing or spraying, and will also form bubbles or affect dimensional stability. Especially for various high-quality special papers produced by Kent Paper Group, dimensional stability is more important . Kent Paper Group has purchased two MEMPERT constant temperature and humidity boxes HPP to observe the reaction of different types of paper when the environmental humidity is gradually increasing.

In 2007, a study by Voith Paper Environmental Solutions showed that every ton of paper produced consumes 20 cubic meters of clean water, which is even higher in developing countries. At the end of production, the same volume of wastewater will enter the drainage system. Even if these wastewaters can biodegrade and remove oxygen in the water, it will increase the survival burden of fish and other aquatic organisms. Paper manufacturers are looking for an eco-friendly, energy-saving production process to greatly reduce the amount of waste water discharged, and strive to produce 1 to 2 liters of waste water per 1 kg of paper produced, and make these waste water as unpolluted as possible. Reuse. A very important item in evaluating the key indicators of wastewater is BSB 5 (DIN EN 1899-1), that is, biochemical oxygen consumption. The details are as follows: add oxygen-saturated water containing bacteria to the wastewater sample, that is, the content of oxygen in the mixed sample is fixed; put the mixed water sample into the MEMMERT low temperature incubator IPP for cultivation, the temperature is 20 ℃, use bacteria or other Microorganisms consume organic substances in wastewater; after 5 days of cultivation, the oxygen content in the mixed water sample is measured again, and the oxygen consumption mg O2 / l can be calculated to reflect the degree of pollution of the wastewater by organic substances.

Germany's MEMMERT's constant temperature and humidity box HPP and low temperature incubator IPP are both semiconductor heating and cooling. They have the characteristics of accurate and stable temperature control, no compressor, low energy consumption, no regular maintenance, and quiet operation. And the best choice for microbial culture.