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991.
992.
993.
粪便与生活垃圾混合堆肥氮转化与腐熟度 总被引:2,自引:0,他引:2
采用静态仓强制通风进行粪便和生活垃圾混合堆肥,以玉米秸和石灰为调理剂,考察堆肥过程的氮转化与腐熟度。试验结果表明:堆肥中氮的损失量为26%~49%,堆体高温期持续时间长,导致氮的损失增加。添加石灰使堆肥前期的氮损失率增加,但加快了堆肥过程,总氮的损失没有加大。水溶性氨氮含量在堆肥升温期出现峰值5.61mg/gdw,堆肥结束时氨氮含量小于0.34mg/gdw;堆肥中硝态氮主要在降温期和腐熟期形成,达到1.84~4.05mg/gdw。氨氮和硝态氮之比小于0.16和水溶态有机碳与总氮之比小于1.10,较适合作为粪便与垃圾的混合堆肥腐熟指标。 相似文献
994.
Zhengyang Huo Young Jun Kim Yuying Chen Tianyang Song Yang Yang Qingbin Yuan Sang Woo Kim 《Frontiers of Environmental Science & Engineering》2023,17(10):118
995.
通过室内土柱淋溶实验,研究模拟酸雨对废弃线路板组成元素的影响,并分析了浸出液的组分特征和变化规律.结果表明,废弃线路板中组成元素(Cu、Pb、Zn、Ca、Mg和Cl) 浸出浓度随酸雨pH值的降低而增大;其中Cu、Pb和Zn的浸出浓度随淋溶液体积的增大呈现先增加后降低的趋势;而Cl、Ca和Mg的浸出浓度在淋溶初期达到最大值,之后随着淋溶液体积的增大而减小;Cu和Pb的浸出浓度在平稳状态仍然远大于国家地表水Ⅲ类标准.使用Visual MINTEQ软件模拟浸出液中Cu、Pb和Zn 3种元素的组分存在形态表明,Pb和Zn主要以Pb2+和Zn2+为优势态,Cu在pH4.0时,主要存在形态为CuSO4(aq). 相似文献
996.
On domestic waste recycling, it was found that source separation of domestic waste in mainland China was supported by 85%
of the urban population and about 11–13% of the household waste was recovered and sold by the householders for financial gains.
It was also found that the lower income group tended to recover a greater portion of waste, indicating that voluntary waste
recovery activities in mainland China were carried out largely due to economic reasons. Thus, the Western type of source separation
program in which residents are requested to separate recyclables for the community may not be welcomed in mainland China.
In Hong Kong, despite the presence of community waste recovery programs, the recovery of domestic waste is only about 6% and
is therefore less than those of the mainland Chinese cities surveyed. On the choice of source separation programs, it was
found that Hong Kong people ranked familiarity a more important criterion than convenience. Therefore, the collection frequency
of recyclables and time and place for setting out recyclables should be as similar to those of normal waste collection as
possible to attract high participation in source separation programs. 相似文献
997.
本文简要介绍了我们在工业废气监测分析数据处理编制的计算机软件的特点和应用。该软件可免除康气监测数据处理时繁琐的人工计算过程,数据处理结果能在Word,Excel字表处理软件窗口编辑打印报告单。 相似文献
998.
This article describes how Taiwan nitrocellulose industrial company (TNC) applies the structured methodology developed by the U.S. environmental protection agency (USEPA) to reduce, recycle and recover the wastes generated at its Taoyuan plant. The company has generated significantly less amounts of wastes, improved the competitiveness in the international market and met more stringent environmental regulations since conducting the minimization program in the late 1980s. The experience gained at the Taoyuan plant is being applied to other plants in China and Philippines. 相似文献
999.
Masahiro Shimada Takahiko Iida Kensuke Kawarada Yoshifumi Chiba Toshihiro Mamoto Takayuki Okayama 《Journal of Material Cycles and Waste Management》2000,2(2):100-108
In an earlier report, we presented a method for preparing activated carbon from waste newspaper as a way to recycle used paper
for a purpose other than producing raw material for paper-making. In this article, we consider the porous structure of the
activated carbon that affects its adsorption properties for various substances. The specific surface area of activated carbon
prepared from waste newspaper was 838 m2/g, the micropore volume was 0.368 ml/g, and the mesopore volume was 0.138 ml/g, which is about the same as commercially available
activated carbon. The activated carbon prepared from waste newspaper usually has a high content of ash, which makes little
contribution to the adsorption properties. In particular, as compared with reagent-activated carbon, the quantities of mesopores
with a pore radius of 3–25 nm and macropores with a pore radius of 25–250 nm were 8 and 14 times larger, respectively. Activated
carbon prepared from waste newspaper has a well-developed porous structure, particularly in the mesopore and macropore ranges.
Received: July 12, 1999 / Accepted: March 8, 2000 相似文献
1000.
运用美国水生生物毒性鉴别评价技术对组分相对复杂的某化工厂废水进行毒性原因鉴别。结果表明:导致该厂废水毒性的关键污染物是二萘酚,对硝基氯苯和间硝硝基氯苯。对TIE技术在中国推广的实用性,可行性以及应用前景等进行了讨论。 相似文献