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[來源:www.haradaip.com] [作者:淤泥固化] [日期:17-02-13]
熱水解預處理技術是以含固率15%~20%的脫水污泥為對象進行的厭氧消化技術。具體而言,該工藝是通過高溫高壓熱水解預處理,以高含固的脫水污泥(含固率15%~20%)為對象的厭氧消化技術。工藝采用高溫(155℃~170℃)、高壓(6bar)對污泥進行熱水解與閃蒸處理,使污泥中的胞外聚合物和大分子有機物發生水解、并破解污泥中微生物的細胞壁,強化物料的可生化性能,改善物料的流動性,提高污泥厭氧消化池的容積利用率、厭氧消化的有機物降解率和產氣量,同時能通過高溫高壓預處理,改善污泥的衛生性能及沼渣的脫水性能、進一步降低沼渣的含水率,有利于厭氧消化后沼渣的資源化利用。此工藝已在歐洲國家得到規?;こ虘?。 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. 與傳統消化相比,該工藝具備以下特色:(1)有機物轉化率高(2)無害化水平提高,完全殺滅病原菌,泥餅達到A級;(3)PH略高,可降低沼氣中的H2S和CO2濃度,使CH4含量提高;(4)減少污泥體積,提高污泥穩定性。 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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