Page 277 - 《环境工程技术学报》2022年第5期

Vol.12，No.5 环 境 工 程 技 术 学 报 第 12 卷，第 5 期
Sep.，2022 Journal of Environmental Engineering Technology 2022 年 9 月

熊巧，吕航，吕瑞斌，等.污泥-稻壳协同焚烧对污泥磷资源回收效率的影 响 [J].环境工程技术学报，2022，12（5）：1633-1639.
XIONG Q,LÜ H,LÜ R B,et al.Effect of sludge-rice husk co-incineration on the recovery efficiency of sludge phosphorus resources[J].Journal of
Environmental Engineering Technology，2022，12（5）：1633-1639.

污泥-稻壳协同焚烧对污泥磷资源回收效率的影响

1
熊巧 ，吕航 ，吕瑞斌 ，吴翔 ，吴旭 1,2*
1
1
1
1.华中科技大学环境科学与工程学院
2.湖北华德莱节能减排科技有限公司
摘要 污水处理厂污泥中含有丰富的营养元素磷，回收其中的磷在一定程度上能缓解磷资源的衰竭。利用焚烧法处理污泥，以
稻壳作为添加物，采 用 Hedle 逐级提取法和酸浸出法考察污泥-稻壳焚烧灰中磷的形态和浸出效果的变化，并探讨稻壳添加量
y
对焚烧灰中磷形态的影响。结果表明：当稻壳添加量为总质量 的 50 % 时，磷的生物可利用性最高；响应曲面法优化结果表明，最
佳试验条件 是 HC 浓度、浸出时间和液固比分别 为 0.33 mol/L，6.4 和 h 50 mL/g，该条件下，磷的浸出率 达 93%，与污泥焚烧灰相
l
比提高 了 20%；比较污泥灰、稻壳灰及污泥-稻壳混烧灰的理化性质可知，污泥-稻壳协同焚烧并未改变污泥灰和稻壳灰的主要组
分，但出现了新的物相，形貌也发生了一定变化。污泥-稻壳协同焚烧能提高焚烧灰中磷的浸出率，从而有利于从污泥中回收磷
资源。
关键词 污泥；稻壳；焚烧灰；磷；酸浸出；协同焚烧
中图分类号：X703 文章编号：1674-991X（2022）05-1633-07 doi：10.12153/j.issn.1674-991X.20210484

Effect of sludge-rice husk co-incineration on the recovery efficiency of
sludge phosphorus resources

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XIONG Qiao , LÜ Hang , LÜ Ruibin , WU Xiang , WU Xu 1,2*
1.School of Environmental Science and Engineering, Huazhong University of Science and Technology
2.Hubei Huadelai Energy Saving and Emission Reduction Technology Co., Ltd.
Abstract The sludge of sewage treatment plants is rich in phosphorus and recycling phosphorus from sludge can
alleviate phosphorus depletion to a certain extent. Sludge was treated by incineration, with rice husk as an additive,
and the variation of phosphorus fraction and extraction efficiency in sludge-rice husk incineration ash were
investigated by using Hedley's stepwise extraction method and acid extraction method. The effect of rice husk dose
on phosphorus fraction in incineration ash was explored. The results showed that the phosphorus bioavailability was
the best when the dose of rice husk was 50% of the total mass. Based on the optimization by response surface
method, the optimal condition was found that HCl concentration, extraction time, and the ratio of liquid and solid
were 0.33 mol/L, 6.4 h, and 50 mL/g, respectively. The phosphorus extraction efficiency at the optimal experimental
condition was as high as 93%, which was 20% higher than that of sludge incineration ash. Through comparing the
physical and chemical properties of sludge ash, rice husk ash and ash of co-incineration, it was found that the co-
incineration of sludge and rice husk did not change the main components of sludge ash and rice husk ash, but the
new phase was generated and the morphology changed. The results illustrated that the co-incineration of sludge and
rice husk could improve the phosphorus extraction efficiency of incineration ashes, which was beneficial to the
recovery of phosphorus resources from sludge.
Key words sludge; rice husk; incineration ash; phosphorus; acid extraction; co-incineration

磷是地球上所有生物体必不可少的营养元素。 下，磷矿储量逐渐枯竭 [1-2] 。因此，亟需寻找可替代的
在全球需磷量不断增加以及磷资源无法再生的背景 磷源以缓解磷矿资源的衰竭 。
[3]

收稿日期：2021-09-06
基金项目：国家自然科学基金青年基金项目（51908233）
作者简介：熊巧（1988—），女，博士后，主要研究方向为固体废物资源化，xiongqiao@hust.edu.cn
* 责任作者：吴旭（1984—），男，教授，主要研究方向为环境电化学，profxuwu@hust.edu.cn