Since recycling of waste paper is an important problem for environmental protection, the paper industry strives to improve the utilization rate of used paper. On the other hand, maintaining the quality of deinked pulp is becoming important as the demand level of quality for deinking pulp has become higher.

In recent years, printed matters by UV curable ink have been increasing for environmental reasons such as energy saving and no content of VOC （volatile organic compound）. The UV curable ink is a factor that signifi cantly reduces the quality of the deinked pulp because the conventional deinking method is not applica ble to miniaturize UV cured ink which forms strong fi lm.

So far, conventional drying oils based ink （oxidation and polymerization drying ink） using for newspaper etc. is relatively easy to miniaturize. However the ink is too adhesive to remove, then lead the problem of the diffi culty to improve the quality of deinking pulp even if further operation condition is optimized such as the fl otation process and the dosage of bleaching agent like hydrogen peroxide.

To provide the solution of these problems, weʼve successfully developed “catalyzer–type de–inking agent” combining the techniques of interface science and catalyst science for the fi rst time in this industry.

On the other hand, matters called pitch（dust, dirt）–are generated during the production process of pa per using waste paper. There are a lot of origins of pitch such as the adhesive for postal slip, back glue and resins in coating agents. As conventional pitch control agent provide only the performance of solubilization, emulsifi cation and dispersing of resins, in some cases, pitch is generated due to aggregation and giant growth of particles by demulsification or dispersion–break which are caused by external factors like pH change, shear force and addition of fi xing agent like aluminum sulfate.

These pitches adhere to paper, or paper manufacturing equipment such as aging towers, concentrators, rolls, dryers, etc., in some cases, the accumulated pitches drops off and re–adheres to paper. This reattachment causes problems such as quality loss of paper and decrease in productivity and workability due to paper breakage.

In particular, waste paper recycling plants are facing this pitch （dust, dirt） problem as the same level of frequency as the problem by UV cured ink. Thus the development of the new generation of pitch control agent as the solution of pitch problem has been requested for many years in the paper industry.

In this paper, we further introduce newly developed “hydrolyze–type pitch control agent” by applying the catalyst technology of “catalyzer–type deinking agent”. This new pitch control agent accelerates dissolution of pitches and prevents giant growth by decomposing the resin.

The recent environment surrounding the paper industry has changed, especially with regard to the increase in paper recycling rates. It causes fluctuations in furnish quality, which affects the running stability of the machine and the paper product quality. In this complex situation, we focus on the “water” often used in the papermaking process to improve productivity. The combination of inorganic slime control agent and aeration stabilizes the water quality more efficiently than ever. The “S.sensing system^®” has three functions：monitoring, analysis and control.

First, we monitor water quality and accumulate machine operation and paper quality information from customers. Next, analyze the correlation between them. Third, control the water quality, improve the operation stability of the machine and the quality of paper products. In this report, 1）the drainage load reduction by the water quality stabilization technology by inorganic slime control agent and aeration, 2）improvement of operation by correlation analysis of operation and water quality, 3）control case using S. sensing system are introduced.

In recent years, while the reduction of by–products, which are by–products, and zero emissions are called for in production factories, the present situation is that the reduction of essential waste has not been achieved. In addition, the sharp decline in the export of plastic waste to China has triggered the rise in the cost of industrial waste disposal in Japan, and the reduction of waste at the factory level and the reduction of internal waste have been required. Most pulpers generated as wastes in the papermaking process using waste paper as the main material are mostly plastic, and high moisture content is discharged. Although these are temporarily treated, they are still incinerated or industrial waste treated with a high water content of 60％ or more. On the other hand, paper companies that own biomass boilers purchase fuel from waste plastic from outside as RPF. RPF is originally molded from waste plastic and paper etc. with low moisture content JIS standard. During molding, frictional heat is generated and the melted plastic melts and solidifies in a form that mixes paper However, since the pulper cake has an originally high moisture content when discharged, the heat of melting necessary for forming is taken away by the heat of vaporization, and solidification is almost impossible. As a solution to this structural problem, the machine separates the part where water is discharged, and uses a compression mechanism to compress the pulper weir in the previous stage to separate it from the water and discharge it from the lower part of the machine. Molded in. Pulverizer with high moisture content can be converted to solid fuel.

Essentially, the highest priority in plant operation is “safety” and it means that damage to people from plant accidents should never be occurred. In Japan, plant safety has been protected by strict maintenance and education and training for users. However, in a society where the working population declines as the birthrate declines and the population ages, visualization of tacit knowledge and the problem of technology transfer are emerging as safety issues in various industrial fields. In this paper, to tackle this problem, the design and systematization method of functional safety of plant based on international standard IEC（Interna tional Electrotechnical Commission） is introduced.

Industrie 4.0 is a project in the high–tech strategy of the German government and is the title given to the next fourth Industrial Revolution. As part of Industrie 4.0 Voith Paper has already started to introduce and promote the Papermaking 4.0 concept globally. It based on the next generation of cyber–physical systems, encompassing the full life–cycle knowledge and intelligence necessary for the autonomous decentralized control of manufacturing plants. This coupled with big data analytics providing better insight and predictive capabilities allows for the next leap in productivity and cost reduction.

Concept of papermaking 4.0 is pervading at paper industry. However no installation reference in Japan so far. And because of this many of us think this is still future technology and not yet adaptable in Japanese market. When we look at oversea market more and more reference are made.

Thanks for this opportunity, VPIT introduce actual installation of OnE strength which is one of PM 4.0 product. Value added assessment （VAA） is carried out ahead of OnE installation. VAA is kind of process and digital audit. Find out what kind of model can adapt to individual machine. This audit result give the customer clear image what kind of benefit they can get thorough PM 4.0 installation.

With increasing competition worldwide, the pulp and paper manufacturers require greater emphasis on cost reduction and increased product efficiency and quality. Chemical recovery process continues to be a crit ical component of a pulp mill, providing chemical, steam, and power. The mill’s economic viability rests in large part from efficient and optimized chemical recovery operations. The use of Fourier-transform Near Infrared Spectroscopy （FTNIR） has been fully developed by FPInnovations （formerly Paprican） and it’s Alli ance Partners, as proven process analyzers for online measurements of various streams in the chemical recovery processes, including: raw green liquor for TTA control, clarified green liquor for TTA trim control and feedforward slaker control, causticizer white liquors for CE control, as well as weak black liquor residual effective alkali, lignin, organics, inorganics, and total solids content to provide feedforward for evaporator control.

These measurements have led to new advancements in control strategies which take advantage of the multitude of liquor chemical compositions, starting with advanced control of the dissolving tank TTA to feed forward slaker control and final CE control. With the implementations of these analyzers and control strategies, mills have reported significant process variability reduction, typically from 40％ to 60％，allowing for target shifts to higher TTAs and higher CEs. In addition, these mills have reported significant reduction in purchased lime usage and all mills reported reduction in pressure filter maintenance, reduced plugging in evaporators, and plugging in recovery boiler. In one case, increase WL strength and debottlenecking recausticizing area resulted in significant increase in digester production. ROI ranged from $500 K to $3 M.

This paper will briefly review the technology and will give further details on economic impacts achieved through efficient and optimized chemical recovery operations with the use of process analyzers and control.