Czechowski Franciszek, Marcinkowski Tadeusz
Institute of Environment Protection Engineering, Wroclaw University of Technology, 9 Grunwaldzki Pl., 50-377 Wroclaw, Poland.
Water Res. 2006 May;40(9):1895-905. doi: 10.1016/j.watres.2006.02.023. Epub 2006 Apr 18.
Raw primary sewage sludge (Wastewater Treatment Plant of Krotoszyn, SW Poland) and its mixtures with 3%d, 6%d, 9%d, 12%d and 24%d of calcium hydroxide were stabilised for 1 and 35 days. Changes of the sludge physicochemical properties and molecular composition, caused by alkaline agent in course of stabilisation process, are recognised. A basic physicochemical data on the sludge cake and filtrate after 1 and 35 days of stabilisation process are given. Soxhlet extracts from the sludge cakes stabilised for 35 days as well pyrolysis and pyrolysis in situ methylation (using tetramethylammonium hydroxide-TMAH) products of respective pre-extracted cake residues were analysed by gas chromatography-mass spectrometry (GC-MS). Increase of calcium hydroxide concentration in the sludge mixture causes enhanced ammonia release, preferential hydrolyses of fats and proteins from the sludge macromolecular network and transformation of free fatty acids contained in the sludge lipids, as well as these released hydrolytically, to their calcium salts. The sewage sludge stabilisation with calcium hydroxide has no effect on homological assemblage and content of unbound stanol and sterol compounds in the sludge lipids and these bound into macromolecular network. Biogenic n-alkanes and anthropogenic linear alkylbenzenes were detected as minor components in the lipids and pyrolytic products from the pre-extracted cake residue, respectively. The alkaline agent used for the sludge stabilisation accelerates equilibration of the process and reduces content of pathogenic microorganisms.
未处理的原生污水污泥（波兰西南部克罗托申污水处理厂）及其与3%、6%、9%、12%和24%氢氧化钙的混合物分别稳定化处理1天和35天。识别了稳定化过程中碱性试剂引起的污泥物理化学性质和分子组成的变化。给出了稳定化处理1天和35天后污泥饼和滤液的基本物理化学数据。对稳定化35天的污泥饼的索氏提取物以及相应预提取饼残渣的热解和原位甲基化热解（使用氢氧化四甲铵-TMAH）产物进行了气相色谱-质谱联用（GC-MS）分析。污泥混合物中氢氧化钙浓度的增加导致氨释放增强，污泥大分子网络中脂肪和蛋白质的优先水解，以及污泥脂质中所含游离脂肪酸以及水解释放的游离脂肪酸向其钙盐的转化。用氢氧化钙对污水污泥进行稳定化处理对污泥脂质中未结合的甾烷醇和甾醇化合物以及结合到大分子网络中的这些化合物的同系物组合和含量没有影响。在脂质和预提取饼残渣的热解产物中分别检测到生物源正构烷烃和人为源线性烷基苯作为次要成分。用于污泥稳定化的碱性试剂加速了该过程的平衡并降低了致病微生物的含量。
