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[1]江麗華,卓桂華,陳細妹,等.藥劑聯合高溫對低有機質污泥水解促進研究[J].中國給水排水,2022,38(19):86-92.
JIANGLi-hua,ZHUOGui-hua,CHENXi-mei,et al.Effects of Chemical Agent Combined with High Temperature on Hydrolysis of Sludge with Low Organic Content[J].China Water & Wastewater,2022,38(19):86-92.
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JIANGLi-hua,ZHUOGui-hua,CHENXi-mei,et al.Effects of Chemical Agent Combined with High Temperature on Hydrolysis of Sludge with Low Organic Content[J].China Water & Wastewater,2022,38(19):86-92.
藥劑聯合高溫對低有機質污泥水解促進研究
中國給水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第38卷 期數: 2022年第19期 頁碼: 86-92 欄目: 出版日期: 2022-10-01
- Title:
- Effects of Chemical Agent Combined with High Temperature on Hydrolysis of Sludge with Low Organic Content
- 關鍵詞:
- 低有機質污泥; 高溫熱水解; 聯合預處理; 厭氧消化; 有機物溶出
- Keywords:
- sludge with low organic content; thermophilic hydrolysis; combined pretreatment; anaerobic digestion; dissolution of organic matter
摘要:- 厭氧消化是實現污泥穩(wěn)定和能源回收的主要途徑之一。我國南方地區(qū)污水處理廠廣泛采用生物營養(yǎng)物去除工藝，普遍存在進水有機物含量低的問題，導致污泥有機質含量也偏低（VS/TS<0.6）。針對南方典型低有機質污泥，在120 ℃、0.5 h條件下分別投加NaOH、Ca（OH）2和CaCl2進行聯合高溫熱水解預處理后，進行中溫厭氧消化。結果表明，投加藥劑聯合高溫熱水解促進了溶解性有機碳（SOC）、可溶糖、可溶性蛋白質的溶出，進而提高了累積產甲烷量。在高溫熱水解預處理過程中，藥劑對有機物的溶出效果為NaOH>Ca（OH）2>CaCl2。在后續(xù)厭氧消化過程中，由于CaCl2可提高SCOD中碳水化合物占比，投加CaCl2聯合高溫熱水解后總化學需氧量（TCOD）和總糖降解效果明顯，TCOD降解量為25 326 mg/L且總糖降解量在TCOD降解量中占比最高（87.7%），因而3 種藥劑中CaCl2的累積產甲烷量最高（183.1 mL/gVS）。CaCl2聯合高溫熱水解預處理較NaOH、Ca（OH）2更能提高低有機質污泥的厭氧產沼性能。
Abstract:- Anaerobic digestion is one of the main strategies to facilitate sludge stabilization and energy recovery. The biological nutrient removal process is widely applied in wastewater treatment plants in southern China, and the widespread low content of influent organic matter results in the low content of sludge organic matter (VS/TS < 0.6). In this paper, the typical sludge with low organic content in southern China was first pretreated with chemical agents including NaOH, Ca(OH)2 and CaCl2 combined with thermophilic hydrolysis at 120 ℃ for 0.5 h. Then, the sludge was used as the substrate for mesophilic anaerobic digestion. The addition of chemical agents combined with thermophilic hydrolysis promoted the release of soluble organic carbon (SOC), soluble sugar and soluble protein, and increased the cumulative methane production. In the process of thermophilic hydrolysis pretreatment, the efficiency of chemical agents for dissolution of organic matters in descending order was NaOH, Ca(OH)2 and CaCl2. In the subsequent anaerobic digestion process, since CaCl2 promoted the proportion of carbohydrates in SCOD, the degradation efficiencies of total chemical oxygen demand (TCOD) and total sugar were obviously improved after dosing CaCl2 combined with thermophilic hydrolysis. The degradation of TCOD was 25 326 mg/L, and the degradation of total sugar accounted for the highest proportion of the degraded TCOD (87.7%), so the cumulative methane production of CaCl2 among the three agents was the highest (183.1 mL/gVS). The addition of CaCl2 combined with thermophilic hydrolysis pretreatment was more effective to enhance the anaerobic biogas production performance of low organic sludge than NaOH and Ca(OH)2.
更新日期/Last Update: 2022-10-01
