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[来源:www.yuniguhua.com] [作者:淤泥固化] [日期:17-02-13]
热水解预处理技术是以含固率15%~20%的脱水污泥为对象进行的厌氧消化技术。具体而言,该工艺是通过高温高压热水解预处理,以高含固的脱水污泥(含固率15%~20%)为对象的厌氧消化技术。工艺采用高温(155℃~170℃)、高压(6bar)对污泥进行热水解与闪蒸处理,使污泥中的胞外聚合物和大分子有机物发生水解、并破解污泥中微生物的细胞壁,强化物料的可生化性能,改善物料的流动性,提高污泥厌氧消化池的容积利用率、厌氧消化的有机物降解率和产气量,同时能通过高温高压预处理,改善污泥的卫生性能及沼渣的脱水性能、进一步降低沼渣的含水率,有利于厌氧消化后沼渣的资源化利用。此工艺已在欧洲国家得到规模化工程应用。 Thermal hydrolysis pretreatment technology is based on solid content 15% ~ 20% of the dewatered sludge anaerobic digestion technology for object. Specifically, the process by high temperature and high pressure thermal hydrolysis pretreatment, with high dewatering sludge containing solid (solid content 15% ~ 20%) as the object of anaerobic digestion technology. Process using the high temperature (155 ℃ ~ 170 ℃) and high pressure (6 bar) to thermal hydrolysis and flash the sludge, cause extracellular polymers and macromolecular organic matter in the sludge hydrolysis, and crack in the sludge microbial cell walls, strengthening material for biochemical performance, improve liquidity material, improving the utilization ratio of the volume of sludge anaerobic digestion pool, anaerobic digestion of organic matter degradation rate and gas production, at the same time can through the pretreatment of high temperature and high pressure, improve health performance and renewal of the sludge dewatering performance, to further reduce the moisture content of renewal, is conducive to renewal after anaerobic digestion of recycling use. This process has been large-scale engineering application in European countries. 与传统消化相比,该工艺具备以下特色:(1)有机物转化率高(2)无害化水平提高,完全杀灭病原菌,泥饼达到A级;(3)PH略高,可降低沼气中的H2S和CO2浓度,使CH4含量提高;(4)减少污泥体积,提高污泥稳定性。 Compared with traditional digestion, the technology has the following characteristics: (1) organic high conversion rate (2) the harmless level, completely kill pathogenic bacteria, to reach A level of mud cake; (3) the PH slightly tall, can reduce the concentration of H2S and CO2 in the methane, CH4 content increased; (4) to reduce the sludge volume, and enhances the stability of the sludge.

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