研究报告

  • 吴书林,肖立群,沈东升,龙於洋.次氯酸钙预处理对污泥厌氧发酵合成中链脂肪酸的影响研究[J].环境科学学报,2022,42(12):224-230

  • 次氯酸钙预处理对污泥厌氧发酵合成中链脂肪酸的影响研究
  • Effects of calcium hypochlorite pretreatment on medium-chain fatty acids production from waste activated sludge fermentation
  • 基金项目:浙江省自然科学基金(No. LQ23E080006)
  • 作者
  • 单位
  • 吴书林
  • 浙江工商大学环境科学与工程学院,浙江省固体废物处理与资源化重点实验室,浙江工商大学分析测试中心,杭州 310012
  • 肖立群
  • 浙江工商大学环境科学与工程学院,浙江省固体废物处理与资源化重点实验室,浙江工商大学分析测试中心,杭州 310012
  • 沈东升
  • 浙江工商大学环境科学与工程学院,浙江省固体废物处理与资源化重点实验室,浙江工商大学分析测试中心,杭州 310012
  • 龙於洋
  • 浙江工商大学环境科学与工程学院,浙江省固体废物处理与资源化重点实验室,浙江工商大学分析测试中心,杭州 310012
  • 摘要:探究了次氯酸钙(Ca(ClO)2)预处理对活性污泥厌氧发酵合成中链脂肪酸(MCFAs)的影响,结果表明Ca(ClO)2能显著提高污泥的降解性能,且发酵液中可溶性有机物增量与Ca(ClO)2浓度梯度呈正相关.当预处理浓度为80 mg?g-1时,产出MCFAs浓度达到峰值(5691.9 mg?L-1),是空白组的2.6倍.然而,更高Ca(ClO)2(240 mg?g-1)预处理浓度下其对污泥中的微生物过程(水解、酸化过程)的抑制作用导致MCFAs产出浓度有所降低.本研究为拓展污泥高值化处理技术提供了新思路.
  • Abstract:This research investigated the effects of pretreatment of calcium hypochlorite (Ca(ClO)2) on the production of medium chain fatty acids (MCFAs) by anaerobic fermentation of activated sludge. Results showed that Ca(ClO)2 pretreatment could significantly improve the degradation performance of sludge, and the yield of soluble organic matter in fermentation medium was positively correlated with the Ca(ClO)2 concentration. When the pretreatment concentration was 80 mg?g-1, the MCFAs concentration reached the maximum (5691.9 mg ?L-1), which was 2.6 times higher than that of the blank group. However, at higher Ca(ClO)2 (240 mg?g-1) pretreatment concentration scenario, the inhibition of microbial processes (hydrolysis and acidification) in the sludge fermentation caused the decreased production of MCFAs. This study provides a new idea for the development of sludge valorization technology.

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