K2O杂质对铝型材厂工业废渣合成的堇青石材料晶相结构的影响

主要探讨K2O杂质对堇青石形成及晶相结构的影响.采用XRD和SEM确定各试样的晶相结构和显微结构.实验结果表明:K2O杂质含量从0.23~1.1wt%,形成的堇青石晶相量较多,其中K2O杂质含量为1.1wt%时,堇青石含量高达90%,当K2O含量继续增加时,形成的堇青石量开始减少,确定试样中K2O杂质最高允许含量为1.1wt%.plus软件分析结果:K2O杂质对堇青石的晶胞结构影响不大,晶胞参数变化很小.     

韶钢民用焦炉煤气脱硫工艺的改进

提出焦炉煤气二段干法脱硫方法,一段采用价廉易得的转炉污泥脱硫剂去除90％以上的硫化氢,二段采用TG系列高效成型脱硫剂。运行结果表明：二段工艺运行稳定,出口煤气H2S含量小于10mg／m^3。     

派酶在垃圾和淤污泥资源化中的作用

“派酶”是一种新型的工程土质改良材料,许多事例表明,它在垃圾处理和污泥淤泥资源化方面大有作为。派酶技术在某路基施工中试用成功说明在公路路基、坪基工程方面有较好应用前景和推广价值。     

ICEAS工艺启动及活性污泥培养驯化应用实例

结合福州市金山污水处理厂工艺及及活性污泥培养驯化实例,分析总结ICEAS工艺启动及活性污泥培养驯化经验。     

含铀氟化钙渣的产生控制及清洁解控条件研究

含铀氟化钙渣是核燃料循环前段中的重要废物之一,通常要求其应能清洁解控。本文根据我国含铀氟化钙渣产生的主要特点,经过理论计算,推导出生产和废液处理工艺中控制含铀氟化钙渣放射性活度浓度的技术条件,如核燃料厂应控制进入固氟蒸氨工艺的废液处理量V和铀的质量浓度C₁,满足VC₁＜723 g的要求。本文还对含铀氟化钙中铀的监测提出了以监测沉淀工艺废液中的铀为主,氟化钙渣中铀的测量为辅的监测思路,对含铀氟化钙渣的回收再利用提出了统一规划、协调管理、标准化解控程序的建议。     

Disposal of domestic sludge and sludge ash on volcanic soils

Column leaching experiments were conducted to test the ability of Chilean volcanic soils in retaining the mineral constituents and metals in sewage sludge and sludge ash that were incorporated into the soils. Small or negligible amounts of the total content of Pb, Fe, Cr, Mn, Cd, and Zn (0 to <2%), and more significant amounts of mineral constituents such as Na (7-9%), Ca (7-13%), PO4 (4-10%), and SO4 (39-46%) in the sludge and sludge ash were readily soluble. When they were incorporated on the surface layer of the soils and leached with 12 pore volumes of water over a 3 month period of time, less than 0.1% of the total amount of heavy metals and PO4 in the sludge and sludge ash were collected in the drainage water. Cation exchange selectivity, specific anion adsorption and solubility are the processes that cause the reduction of leaching. The volcanic soils were capable of retaining the mineral constituents, P, and metals in applied sewage sludge and sludge ash and gradually released them as nutrients for plant growth.     

Bio-treatment of oily sludge: the contribution of amendment material to the content of target contaminants, and the biodegradation dynamics

The objective was to investigate the aerobic biodegradation of oily sludge generated by a flotation-flocculation unit (FFU) of an oil refinery wastewater treatment plant. Four 1m(3) pilot bioreactors with controlled air-flow were filled with FFU sludge mixed with one of the following amendments: sand (M1); matured oil compost (M2); kitchen waste compost (M3) and shredded waste wood (M4). The variables monitored were: pH, total petroleum hydrocarbons (TPHs), polycyclic aromatic hydrocarbons (PAHs), total carbon (C(tot)), total nitrogen (N(tot)) and total phosphorus (P(tot)). The reduction of TPH based on mass balance in M1, M2, M3 and M4 after 373 days of treatment was 62, 51, 74 and 49%; the reduction of PAHs was 97%, +13% (increase), 92 and 88%, respectively. The following mechanisms alone or in combination might explain the results: (i) most organics added with amendments biodegrade faster than most petroleum hydrocarbons, resulting in a relative increase in concentration of these recalcitrant contaminants; (ii) some amendments result in increased amounts of TPH and PAHs to be degraded in the mixture; (iii) sorption-desorption mechanisms involving hydrophobic compounds in the organic matrix reduce bioavailability, biodegradability and eventually extractability; (iv) mixture heterogeneity affecting sampling. Total contaminant mass reduction seems to be a better parameter than concentration to assess degradation efficiency in mixtures with high content of biodegradable amendments.     

Enhancing the use of waste activated sludge as bio-fuel through selectively reducing its heavy metal content

Power plant or cement kiln co-incineration are important disposal routes for the large amounts of waste activated sludge (WAS) which are generated annually. The presence of significant amounts of heavy metals in the sludge however poses serious problems since they are partly emitted with the flue gases (and collected in the flue gas dedusting) and partly incorporated in the ashes of the incinerator: in both cases, the disposal or reuse of the fly ash and bottom ashes can be jeopardized since subsequent leaching in landfill disposal can occur, or their "pozzolanic" incorporation in cement cannot be applied. The present paper studies some physicochemical methods for reducing the heavy metal content of WAS. The used techniques include acid and alkaline thermal hydrolysis and Fenton's peroxidation. By degrading the extracellular polymeric substances, binding sites for a large amount of heavy metals, the latter are released into the sludge water. The behaviour of several heavy metals (Cd, Cr, Cu, Hg, Pb, Ni, Zn) was assessed in laboratory tests. Results of these show a significant reduction of most heavy metals.     

造纸白泥低温合成硅灰石在快烧釉面砖中的应用研究

根据造纸白泥的组成、性能、特点,以白泥为主要原料,加入一定量硅质原料。采用烧结法低温(1100℃)合成了硅灰石,其白泥用量占原料总质量分数的70％,并将合成的硅灰石综合用于一次低温快烧釉面砖中,其理化性能指标均达到国家标准。     

History and prospects of irradiation treatment of sewage sludge

This paper presents a survey of irradiation treatment of sewage sludge in the world.Since the first lusge irradiation plant was built in Geiselbullach.West Germany is 1973 which used ^60Co as irradiation source,many sludge irradiators were constructed in USA,India,Japan,Canada,Poland and so on,which used ^60Co,^137Cs or electron beam as irradiation sources.Some basic researches on irradiation treatment of sewage sludge are,respectively,reviewed including optimization of irradiation parameters,synergistic effect of radiation with heat,oxygenation,irradiation-composting and potential applications of treated sludge.Some Proposals have been suggested for further development of this technology.