In this paper, the preparation and application of copolymers of 2-acrylamido-2-methyl propane sulfo acid (AMPS) were discussed. The results showed that the copolymers with molecular weight 18.10 million can be prepare...In this paper, the preparation and application of copolymers of 2-acrylamido-2-methyl propane sulfo acid (AMPS) were discussed. The results showed that the copolymers with molecular weight 18.10 million can be prepared. In treating waste water from deinked pulp, the dosage of copolymers was 0.75ppm, the optimum dosage of PAC was 100ppm; dosage of the amphoteric polyacylamide (AmPAM) with molecular weight 11.34 million was 0.75ppm, the optimum dosage of PAC was 75ppm. The removed rate of CODcr was above 70%.展开更多
Given the environmental pollution caused by petroleum-based plastics,finding alternative substitutes for sustainability has become critical.Polyhydroxybutyrate(PHB),a storage food material that is accumulated by sever...Given the environmental pollution caused by petroleum-based plastics,finding alternative substitutes for sustainability has become critical.Polyhydroxybutyrate(PHB),a storage food material that is accumulated by several bacteria,is biodegrad-able,safe,environment friendly and comparable to conventional plastics.However,scale-up is an issue due to high produc-tion cost.Substrate replacement using renewable,plentiful,sustainable and low-cost carbon sources derived from industrial waste facilitates waste reduction,while also enabling the synthesis of value-added products.In this context,inexpensive pulp and paper industrial waste as carbon source was exploited for production of PHB by using previously isolated(Source:hot springs of Manikarn,Himachal Pradesh,India)thermophilic bacteria Bacillus sonorensis NAM5 under optimized conditions in a fermenter.Production was done in a fermenter under optimized conditions(72 h of incubation at 50℃temperature and 7 pH)to enhance the accumulation of PHB.The bacterial strain was able to produce 5.28±0.11 gL^(-1)after 72 h of growth without any carbon and nitrogen source supplementation to the industrial effluent.The culture accumulated 66%PHB of cell dry weight(CDW).The produced polymer was characterized through FTIR,NMR and TGA.Additionally,bacteria-treated industrial wastewater was used for phytotoxicity assay on agriculturally important crops such as wheat,maize and mung,which exhibited considerable difference in growth parameters.展开更多
Water pollution from the pulp and paper industry is one of the most serious environment problems in China. In order to prevent and treat pollution of the pulp and paper industry, the following works have been done in ...Water pollution from the pulp and paper industry is one of the most serious environment problems in China. In order to prevent and treat pollution of the pulp and paper industry, the following works have been done in recent years: 1. Making necessary policies, measures and regulations; 2. Making overall planning and rational layout; 3. Relying mainly on internal treatment developing external treatment as supplement; 4. Improving the technology of treating wastewater of the pulp and paper industry.展开更多
面对禁废令实施后,箱纸板行业日益缺少优质纤维原料的行业痛点问题,以食品加工废弃物槟榔果壳作为原料,系统性分析其作为纤维原料的应用潜力。当选择用烧碱法制浆(用碱量18%,N a2O计),保温1.5 h时,浆料得率都在40%以上,细浆得率最高达87...面对禁废令实施后,箱纸板行业日益缺少优质纤维原料的行业痛点问题,以食品加工废弃物槟榔果壳作为原料,系统性分析其作为纤维原料的应用潜力。当选择用烧碱法制浆(用碱量18%,N a2O计),保温1.5 h时,浆料得率都在40%以上,细浆得率最高达87.9%。电子显微镜观察到槟榔果壳在煮浆后杂细胞变少,纤维表面粗糙度增加;当槟榔果壳浆质量占比10%时,得到的包装纸强度最大:耐破指数1.97 k P a.m^(2)/g、抗张指数34.21 N.m/g、撕裂指数6.5 m N.m^(2)/g、耐折度12次,且实验数据表明槟榔果壳浆占比在20%以内时,配抄纸张物理性能均满足国家箱纸板标准。展开更多
文摘In this paper, the preparation and application of copolymers of 2-acrylamido-2-methyl propane sulfo acid (AMPS) were discussed. The results showed that the copolymers with molecular weight 18.10 million can be prepared. In treating waste water from deinked pulp, the dosage of copolymers was 0.75ppm, the optimum dosage of PAC was 100ppm; dosage of the amphoteric polyacylamide (AmPAM) with molecular weight 11.34 million was 0.75ppm, the optimum dosage of PAC was 75ppm. The removed rate of CODcr was above 70%.
文摘Given the environmental pollution caused by petroleum-based plastics,finding alternative substitutes for sustainability has become critical.Polyhydroxybutyrate(PHB),a storage food material that is accumulated by several bacteria,is biodegrad-able,safe,environment friendly and comparable to conventional plastics.However,scale-up is an issue due to high produc-tion cost.Substrate replacement using renewable,plentiful,sustainable and low-cost carbon sources derived from industrial waste facilitates waste reduction,while also enabling the synthesis of value-added products.In this context,inexpensive pulp and paper industrial waste as carbon source was exploited for production of PHB by using previously isolated(Source:hot springs of Manikarn,Himachal Pradesh,India)thermophilic bacteria Bacillus sonorensis NAM5 under optimized conditions in a fermenter.Production was done in a fermenter under optimized conditions(72 h of incubation at 50℃temperature and 7 pH)to enhance the accumulation of PHB.The bacterial strain was able to produce 5.28±0.11 gL^(-1)after 72 h of growth without any carbon and nitrogen source supplementation to the industrial effluent.The culture accumulated 66%PHB of cell dry weight(CDW).The produced polymer was characterized through FTIR,NMR and TGA.Additionally,bacteria-treated industrial wastewater was used for phytotoxicity assay on agriculturally important crops such as wheat,maize and mung,which exhibited considerable difference in growth parameters.
文摘Water pollution from the pulp and paper industry is one of the most serious environment problems in China. In order to prevent and treat pollution of the pulp and paper industry, the following works have been done in recent years: 1. Making necessary policies, measures and regulations; 2. Making overall planning and rational layout; 3. Relying mainly on internal treatment developing external treatment as supplement; 4. Improving the technology of treating wastewater of the pulp and paper industry.
文摘面对禁废令实施后,箱纸板行业日益缺少优质纤维原料的行业痛点问题,以食品加工废弃物槟榔果壳作为原料,系统性分析其作为纤维原料的应用潜力。当选择用烧碱法制浆(用碱量18%,N a2O计),保温1.5 h时,浆料得率都在40%以上,细浆得率最高达87.9%。电子显微镜观察到槟榔果壳在煮浆后杂细胞变少,纤维表面粗糙度增加;当槟榔果壳浆质量占比10%时,得到的包装纸强度最大:耐破指数1.97 k P a.m^(2)/g、抗张指数34.21 N.m/g、撕裂指数6.5 m N.m^(2)/g、耐折度12次,且实验数据表明槟榔果壳浆占比在20%以内时,配抄纸张物理性能均满足国家箱纸板标准。
