摘要:
Procedure and relative equipment for determining the presence of toxic substances in water destined for drinking and/or in water effluents, based on the inhibition of the production of biogas (methane) on the part of anaerobic bacterial aggregates.
摘要:
The present application relates to a process for removing hydrogen sulfide H2S from a gas (1) by contacting said gas with a liquid solution (2) containing ferric sulfate in an absorption column (RC). Ferric sulfate and H2S react at room temperature and at a pressure ranging from 1 to 1.2 atm. Ferric ions being reduced to two-valent iron and sulfide oxidised to elemental sulfur. The liquid (4) coming out of the absorption column is filtered in two steps, the retentate (6, 8) comprising elemental sulfur, the filtrate (5, 7) containing the iron ions. The filtrate is sent to a bioreactor (RB) for regeneration, i.e. oxidation of iron to Fe3+ by means of thiobacillus ferroxidans and air injection (10). The regenerated solution is reused in the absorption column (RC). The process faces the problems relating to the alignment between the chemical step and the biological step in order to obtain a process which can stably run continuously.
摘要:
The present application relates to a process for removing hydrogen sulfide H2S from a gas (1) by contacting said gas with a liquid solution (2) containing ferric sulfate in an absorption column (RC). Ferric sulfate and H2S react at room temperature and at a pressure ranging from 1 to 1.2 atm. Ferric ions being reduced to two-valent iron and sulfide oxidised to elemental sulfur. The liquid (4) coming out of the absorption column is filtered in two steps, the retentate (6, 8) comprising elemental sulfur, the filtrate (5, 7) containing the iron ions. The filtrate is sent to a bioreactor (RB) for regeneration, i.e. oxidation of iron to Fe3+ by means of thiobacillus ferroxidans and air injection (10). The regenerated solution is reused in the absorption column (RC). The process faces the problems relating to the alignment between the chemical step and the biological step in order to obtain a process which can stably run continuously.
摘要:
Compositions are disclosed, which are adapted to depollute fresh and sea water bodies from crude oil and petroleum product pollution by microbial action. The growth of micro-organisms capable of metabolizing hydrocarbons is exalted by certain combination of nutrients, such as lecithin as a phosphorus source, hydantoins, amides allophanates, polyamines, acyl-ureas and esters of the hydantoic and allantoic acids as the nitrogen sources. Ureido-derivatives of amides are also contemplated as additional nutrients.
摘要:
A method and a few compositions are disclosed, which are adapted to depollute fresh and sea water bodies from crude oil and petroleum product pollution by microbial action. The growth of micro-organisms capable of metabolizing hydrocarbons is exalted by certain combination of nutrients, such as lecithin as a phosphorus source, hydantoins, amides allophanates, polyamines, acyl-ureas and esters of the hydantoic and allantoic acids as the nitrogen sources. Ureido-derivatives of amides are also contemplated as additional nutrients.
摘要:
A method is disclosed, for depolluting fresh and sea waters from hydrocarbonaceous pollutants, the improvement consisting in that the usual microorganism cultures used for oxidizing the hydrocarbons are integrated by lipophilic and floating compounds which contain slow-release nitrogen in a form which can be assimilated by such micro-organisms. Ureidic derivatives of higher aldehydes are the preferred compounds. Inert supports can be used, if necessary, and still better results are achieved when using also nonionic dispersants and freeze-dried hydrocarbon-oxidizing microorganisms.
摘要:
Process for the biological treatment of mud and oily residues obtained fromhe processing or extraction of crude oil. This process can be applied to mud alone, its mixtures and to suitable combinations of mud and oily emulsions.
摘要:
Process for the treatment of aqueous effluents from the production of epoxy resins, which effluents contain as their main impurities chlorohydrins, glycidol, isopropyl alcohol and sodium chloride, which process comprises the following steps:(a) hydrolytic treatment of the effluent under alkaline conditions, until the effluent's content of epichlorohydrin in reduced down to values of about 75 ppm, and the effluent's glycidol content is reduced to values lower than about 4,000 ppm;(b) removal of about 90% of sodium chloride from the hydrolyzed effluent; and(c) anaerobic digestion of the hydrolyzed, sodium chloride-deprived effluent, after preliminary dilution, neutralization and integration with nitrogen and phosphorus sources.The (b) step can be carried out by means of a process of concentration of the effluent, in order to cause sodium chloride to precipitate, or by submitting the same effluent to a treatment of electrodialysis.
摘要:
The invention relates to a strain of Arthrobacter sp. CBS 208.96 capable of selectively effecting the opening of the C-S bond of sulfurated organic molecules present in carbonaceous materials and its use in a process for the selective removal of organic sulfur from fossil fuels contained therein.
摘要翻译:本发明涉及节杆菌属菌株 CBS 208.96能够选择性地实现碳质材料中存在的硫化有机分子的C-S键的打开,以及其用于从其中所含的化石燃料中选择性除去有机硫的方法。
摘要:
There is provided a solid composition of an organic fertilizer which is the solid product obtained by desalting a vinasse with phosphoric acid in the presence of ethanol. The product contains at least 1.5% of nitrogen, at least 4% of P.sub.2 O.sub.5, at least 5% of K.sub.2 O and at least 8% of carbon. Another composition, this one comprising a mixture of the foregoing with one or more inorganic or organic nitrogen, phosphorus or potassium compounds to yield a complex organo-mineral fertilizer, is also described.
摘要翻译:提供了一种有机肥料的固体组合物,它是通过在乙醇存在下用磷酸对葡萄酒进行脱盐得到的固体产物。 产物含有至少1.5%的氮,至少4%的P 2 O 5,至少5%的K 2 O和至少8%的碳。 还描述了另一种组合物,该组合物包含前述物质与一种或多种无机或有机氮,磷或钾化合物的混合物,以产生复合有机矿物肥料。