职业拳击手
发表于 2025-3-23 13:17:23
https://doi.org/10.1007/978-3-8349-9721-0industry. Chlorine-based chemicals traditionally have been used to bleach pulps because they selectively and efficiently remove lignin. However, chlorinated organic compounds released in this bleaching process are toxic to the environment. The ever-increasing pressure from environmental protection a
横截,横断
发表于 2025-3-23 16:44:28
https://doi.org/10.1007/978-3-8349-9721-0mand has been driven by politics and some by consumer demand. The use of secondary fibers in producing different grades of paper has increased greatly over the past two decades particularly as a result of development in deinking processes. The consumption rate of waste paper (secondary fiber) in dif
连系
发表于 2025-3-23 18:20:40
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separate
发表于 2025-3-24 00:41:21
https://doi.org/10.1007/978-3-8349-8094-6 for pulp and paper production, these mills discharge the used water into the waterways as waste. The paper industry is currently experiencing increasing regulatory pressure to reduce the volume and toxicity of its industrial wastewater. During the past few years, the concept of system closure has b
正面
发表于 2025-3-24 04:37:33
Heiko Noske,Christos Kalogerakisduals, and mill trash, it also generates wastewater treatment sludges like deinking sludge, primary clarifier sludge, and biological sludge. The quantity of sludges varies from site to site. On average, Canadian pulp and paper mills with activated sludge wastewater treatment system produce primary s
Accommodation
发表于 2025-3-24 08:18:38
https://doi.org/10.1007/978-3-658-29462-5lated to the production of odorous compounds during the cooking of wood chips with white liquor and subsequent points of gaseous release to the atmosphere. Even when pure sodium hydroxide is used to treat wood and straw, odors are produced. The cause of these odors is to be found in the residual sul
混合物
发表于 2025-3-24 13:04:37
Introduction,ntinue to increase in the near future. Approximately 155 million tons of wood pulp are produced worldwide and about 260 million are projected for the year 2010.1 However, the industry is very capital-intensive, with small profit margins, which tends to limit experimentation, development, and incorpo
运动的我
发表于 2025-3-24 18:51:08
Wood Pretreatment to Remove Toxic Extractives,ory framework covered conventional parameters such as biochemical oxygen demand, suspended solids, and nutrients. From the 1980s until today, concern has been directed towards chemical toxicity. It has been claimed that the organic materials in the effluents from pulp mills cause a number of biologi
esthetician
发表于 2025-3-24 22:55:29
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grounded
发表于 2025-3-25 01:42:01
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