摘要:
A carbon- and nitrogen-based catalyst consisting essentially of active carbon or active coke and comprising at least 90% by weight of graphite structures containing at least 10% of pores larger than 100 nm in diameter and having incorporated therein an isocyanate which forms C-N-ring structures, the percentage graphite content being at least 90% by weight. The catalayst is especially effective in the low temperature reduction of nitrogen oxides in waste gases.
摘要:
Water-insoluble chlorinated hydrocarbons can be largely degraded by mixing with nitric acid and heating to temperatures of 150.degree. C. to 350.degree. C. under pressures of 6 bar to 350 bar.
摘要:
The present invention relates to a process for the improved separation of clarified liquids from biomass or rather for the separation of clarified sludges in the (aerobic and/or anaerobic) biological treatment of sewage using magnetically separable materials as carrier masses. The carrier masses are organic materials containing magnetically separable inorganic materials incorporated in abrasion-resistant form. These magnetically separable carriers occupy a suspension volume of from 1 to 85% by volume, based on the clarified liquid.The carriers contain magnetically separable inorganic materials incorporated as fillers in organic polymeric materials, particularly in cellular polymeric carriers. Other organic or inorganic fillers may also be used in these organic carriers. The magnetically separable materials used are oxides or mixed oxides of heavy metals, preferably iron oxides, such as Fe.sub.3 O.sub.4 (magnetite) and .gamma.-Fe.sub.2 O.sub.3, which are used in average particle sizes of less than 50 .mu.m, preferably less than 10 .mu.m and more preferably less than 3 .mu.m, for example from 0.1 to 1 .mu.m.These magnetic carriers provide for magnetic separation of the biomasses containing these magnetic materials in the biological treatment of sewage.
摘要:
The gully closure for preventing the pollution of bodies of water in accident situations consists of a flexible mat (1) which covers the gulley surface and is coated with a highly viscous, free-flowing moulding composition (2). A plastically deformable silicone gel has proved particularly successful as a free-flowing moulding composition (2).
摘要:
The present invention relates to a process for the improved separation of clarified liquids from biomass in the aerobic and/or anaerobic biological treatment of sewage carried out using magnetically separable materials as carriers. The magnetically separable inorganic materials are used in quantities of from 1 to 150% by weight, based on activated sludge dry matter. The carriers consist of magnetically separable inorganic materials. The magnetically separable materials used are oxides or mixed oxides of heavy metals, preferably iron oxides, such as Fe.sub.3 O.sub.4 (magnetite) and .gamma.-Fe.sub.2 O.sub.3, which are used in average particle sizes of less than 50 .mu.m, preferably less than 10 .mu.m and more preferably less than 3 .mu.m (for example from 0.1 to 1 .mu.m). These magnetic carriers provide for improved sedimentation or for magnetic separation of the biomasses containing the magnetic materials in the biological treatment of sewage.
摘要翻译:本发明涉及一种在使用可磁分离材料作为载体进行的污水的需氧和/或厌氧生物处理中改进澄清液体与生物质的分离的方法。 基于活性污泥干物质,可磁分离无机材料的用量为1至150重量%。 载体由可磁分离的无机材料组成。 使用的可分离磁性材料是平均粒度小于50微米,优选小于10微米的重金属,优选铁氧化物如Fe 3 O 4(磁铁矿)和γ-Fe 2 O 3的氧化物或混合氧化物,以及 更优选小于3μm(例如0.1〜1μm)。 这些磁性载体在污水的生物处理中提供了改善的沉降或含有磁性材料的生物质的磁分离。