不同絮凝剂对黑臭底泥沉降及脱水性能的影响A study on the effect of different flocculants on the settleability and dewaterability of black and odorous sediments
贺绍鑫;温皓;王东羽;康瑶瑶;连军锋;朱易春;秦欣欣;
摘要(Abstract):
为解决黑臭水体疏浚底泥沉降性能差、含水率高、后续运送与处理处置不便的问题,采用7种絮凝剂(FeCl_3·6H_2O、Fe_2(SO_4)_3·9H_2O等)对黑臭底泥进行预处理,通过测定污泥沉降比、含水率、污泥比阻、分形维数等,研究不同絮凝剂对黑臭底泥脱水性能和沉降性能的影响。结果表明:所选絮凝剂均存在最优投加剂量,在最优剂量下都能显著降低黑臭底泥的污泥沉降比和底泥含水率,提高底泥脱水性能。其中聚丙烯酰胺的最优投加剂量最小,投加量为0.1%(与底泥干重的质量比)时,黑臭底泥的污泥沉降比小于检测限,脱水率94%,污泥比阻从6.47×1012m/kg降到2.58×1012m/kg,絮凝体结构较为紧密,分形维数大于2.5,絮凝效果最优。因此,聚丙烯酰胺是理想的黑臭水体疏浚底泥的预处理药剂,有良好的应用前景。
关键词(KeyWords): 黑臭水体;底泥疏浚;絮凝剂;沉降;脱水
基金项目(Foundation): 江西省教育厅青年科学基金资助项目(GJJ180500);; 江西理工大学博士启动基金资助项目(9120170035)
作者(Authors): 贺绍鑫;温皓;王东羽;康瑶瑶;连军锋;朱易春;秦欣欣;
DOI: 10.19864/j.cnki.jxye.2022.02.012
参考文献(References):
- [1]程玲,赵华章,邓灿,等.黑臭底泥处理余水的强化絮凝脱氮[J].环境工程学报, 2018, 12(3):796-803.
- [2]吴世红.城市黑臭水体遥感监测关键技术研究进展[J].环境工程学报, 2019, 13(6):1261-1271.
- [3]陈国磊,田玲玲,罗静,等.长江经济带城市黑臭水体空间分布格局及影响因子[J].长江流域资源与环境, 2019, 28(5):1003-1014.
- [4]卢艳秋,严群,刘馥雯,等.壳聚糖改性蛭石絮凝除藻效果研究[J].江西理工大学学报, 2017, 38(3):50-55.
- [5]骆丽宁,王丽娟,杨敏,等.氧化-铁盐絮凝联合对调理改善污泥脱水性能的影响[J].环境工程学报, 2018, 12(2):630-637.
- [6] CHEN Z, ZHANG W J, WANG D S, et al. Enhancement of waste activated sludge dewaterability using calcium peroxide preoxidation and chemical re-flocculation[J]. Water Research, 2016,103:170-181.
- [7] ZHANG W J, CHEN Z, CAO B D, et al. Improvement of wastewater sludge dewatering performance using titanium salt coagulants(TSCs)in combination with magnetic nano-particles:Significance of titanium speciation[J]. Water Research, 2017, 110:102-111.
- [8] BLACK A P, CHEN C L. Electrophoretic studies of coagulation and flocculation of river sediment suspensions with aluminum sulfate[J]. Journal-American Water Works Association, 1965, 57(3):354-362.
- [9] SegréG F. A Physicochemical Evaluation of the compressibility and dewatering behavior of dredged sediments[D]. Syracuse:Syracuse University, 2013.
- [10]李晓威,吕鹏,彭万里.湖泊环保疏浚工程中泥浆絮凝效率的优化研究[J].人民黄河, 2016, 38(9):64-67.
- [11]吕纯剑,高红杰,李晓洁,等.沈阳市黑臭水体溶解性有机物组分及其光学特征[J].环境工程学报, 2019, 13(3):559-568.
- [12]李斌,柏杨巍,刘丹妮,等.全国地级及以上城市建成区黑臭水体的分布、存在问题及对策建议[J].环境工程学报, 2019, 13(3):511-518.
- [13]蒋伟,赵永国,陈瑞华,等.黑臭河道底泥特征分析及处理工艺筛选[J].环境监测管理与技术, 2019, 31(3):64-67.
- [14]蔡丽云,黄泽彬,须子唯,等.处理垃圾渗滤液的SBR中微生物种群与污泥比阻[J].环境科学, 2018, 39(2):880-888.
- [15]徐慧敏,何国富,熊南安,等.双频超声波促进剩余污泥的破解[J].环境工程学报, 2017, 11(4):2452-2456.
- [16] FR EDRICKS G A, NELSEN R B, RODR魱GUEZ-LALLENA J A.Copulas with fractal supports[J]. Insurance:Mathematics and Economics, 2005, 37(1):42-48.
- [17]吴敦虎,熊琼,林辉,等.有机高分子絮凝剂在污泥脱水中的应用研究[J].水处理技术, 2004, 30(2):116-118.
- [18]李恺,叶志平,王凤英,等.冷融技术联合化学调理对污泥脱水性能的影响及其机理[J].环境科学学报, 2010, 30(3):536-543.
- [19]詹怀宇,刘千钧,刘明华,等.两性木素絮凝剂的制备及其在污泥脱水的应用[J].中国造纸, 2005,24(2):14-16.
- [20] FENG L, LIU S, ZHENG H L, et al. Using ultrasonic(US)-initiated template copolymerization for preparation of an enhanced cationic polyacrylamide(CPAM)and its application in sludge dewatering[J]. Ultrasonics Sonochemistry, 2018, 44:53-63.
- [21] Z H ANG L H, DUAN F, HUANG Y J, et al. Effect of calcium magnesium acetate on the forming property and fractal dimension of sludge pore structure during combustion[J]. Bioresource Technology,2015, 197:235-243.
- [22] CHAKRABORTI R K, ATKINSON J F, VAN BENSCHOTEN J E.Characterization of alum floc by image analysis[J]. Environmental Science&Technology, 2000, 34(18):3969-3976.