城市污泥兩種低溫協(xié)同干化法的比較研究
董儀1，韓媚玲1，朱芬芬1*，張榮巖1
（1. 中國人民大學(xué)環(huán)境學(xué)院，北京 100872）
摘 要：城市污水處理會產(chǎn)生大量的污泥，污泥脫水是污泥處理處置的關(guān)鍵步驟。污泥熱干化脫水是一種成熟的污泥深度脫水技術(shù)，但污泥熱干化工藝由于其較高的運行成本制約著其在我國的推廣。本文介紹了兩種污泥中提取脂質(zhì)的方法，即索式提取法和超聲波提取法，其在提取污泥中脂質(zhì)的同時可降低污泥的含水率，達到污泥低溫干化的效果。實驗將從提取劑濃度、固液比、提取時間、提取溫度四個參數(shù)探究索式提取的最佳條件；從超聲波功率密度、固液比、時間、溫度四個參數(shù)探索超聲波提取法的最佳條件。為污泥低溫?zé)岣苫夹g(shù)提供一定的參考。
關(guān)鍵詞：城市污泥；低溫?zé)岣苫�；索式提取法，超聲波提取�?/span>
Comparative Study on Two Low Temperature Synergistic Drying Methods of Municipal Sludge
DONG Yi1, HAN Mei-ling1, ZHU Fen-fen1*, ZHANG Rong-yan1
(1.School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China)
Abstract：Urban sewage treatment will produce a large amount of sludge, and sludge dewatering is a key step in sludge treatment and disposal. Sludge thermal drying dehydration is a mature sludge deep dewatering technology, but the sludge thermal drying process restricts its promotion in China due to its high operating cost. This paper introduces the method of extracting lipids from two kinds of sludge, namely, the sock extraction method and the ultrasonic extraction method, which can reduce the moisture content of the sludge while extracting the lipid in the sludge, and achieve the effect of low-temperature drying of the sludge. In this paper, the optimal conditions of cable extraction are explored from four parameters: extractant concentration, solid-liquid ratio, extraction time and extraction temperature. The best ultrasonic extraction method is explored from four parameters: ultrasonic power density, solid-liquid ratio, extraction time and extraction temperature. Provide a certain reference for sludge low temperature thermal drying technology.
Keywords：urban sludge； low temperature heat drying； soxhlet extraction； ultrasonic extraction
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