Study on Excess Sludge Disintegration by High Pressure Jet Impingement Stream

doi:10.12068/j.issn.1005-3026.2021.12.017

Abstract

Abstract: Excess sludge is rich in bacteria， viruses， and organics matter， potentially causing secondary pollution. Sludge disintegration is beneficial to the recovery of organic matter and treatment of harmful substances. Sludge disintegration by high pressure jet impingement stream was investigated. The optimal range of three factors including impinged distance，impinged time， and impinged pressure were determined at a distance of 5cm， a time of 20~25min， and a pressure of around 13.79MPa. Response surface methodology(RSM)was used to analyze the disintegration effects and energy consumption. Disintegration energy ratio(DER)of soluble chemical oxygen demand(SCOD)was the evaluation index of RSM. Considering both disintegration effects and DER_SCOD， 5~6cm， 15~20min and 13.79MPa were suggested. This study provides new insights into physical sludge disintegration.

Key words: excess sludge; high pressure jet; impingement stream; response surface methodology; sludge disintegration

CLC Number:

X705

XIE Yuan-hua， YANG Dai-en， BAI Bing， ZHU Tong. Study on Excess Sludge Disintegration by High Pressure Jet Impingement Stream[J]. Journal of Northeastern University(Natural Science), 2021, 42(12): 1790-1796.

References

[1]Low E W，Chase H A.Reducing production of excess biomass during wastewater treatment［J］.Water Research，1999，33(5):1119-1132.
[2]Li X，Zhu T，Zhang K，et al.Effect of the sequence ultrasonic operation on anaerobic degradation of sewage sludge［J］.International Biodeterioration & Biodegradation，2016，112:66-71.
[3]由美雁，张秀秀，沈阳，等.超声空化热效应破解剩余污泥的机制［J］.东北大学学报(自然科学版)，2019，40(1):126-131.(You Mei-yan，Zhang Xiu-xiu，Shen Yang，et al.Mechanism of thermal effect of ultrasonic cavitation on excess sludge disintegration［J］.Journal of Northeastern University(Natural Science)，2019，40(1):126-131.)
[4]Kavitha S，Banu J R，Kumar G，et al.Profitable ultrasonic assisted microwave disintegration of sludge biomass:modelling of biomethanation and energy parameter analysis［J］.Bioresource Technology，2018，254:203-213.
[5]谢元华，梅健，王杰，等.爆炸冲击波破解剩余污泥的实验研究［J］.东北大学学报(自然科学版)，2018，39(3):446-450.(Xie Yuan-hua，Mei Jian，Wang Jie，et al.Experimental study on disintegration of excess sludge by explosive shock wave［J］.Journal of Northeastern University(Natural Science)，2018，39(3):446-450.)
[6]Li X W，Chen L B，Ji Y Y，et al.Effects of chemical pretreatments on microplastic extraction in sewage sludge and their physicochemical characteristics［J］.Water Research，2020，171:115379.
[7]Jung H J，Kim J A，Lee S Y，et al.Effect of mild-temperature H₂O₂ oxidation on solubilization and anaerobic digestion of waste activated sludge［J］.Environmental Technology，2014，35(13):1702-1709.
[8]Bashir A，Wang L，Deng S，et al.Phosphorus release during alkaline treatment of waste activated sludge from wastewater treatment plants with Al salt enhanced phosphorus removal:speciation and mechanism clarification［J］.Science of Total Environment，2019，688:87-93.
[9]Wacawek S，Grübel K，Silvestri D，et al.Disintegration of wastewater activated sludge(WAS)for improved biogas production［J］.Energies，2019，12(1):21.
[10]Somers M H，Azman S，Sigurnjak I，et al.Effect of digestate disintegration on anaerobic digestion of organic waste［J］.Bioresource Technology，2018，268:568-576.
[11]李现瑾，苑春莉，余宏，等.厌氧处理结合超声空化高效破解剩余污泥［J］.东北大学学报(自然科学版)，2015，36(6):868-871.(Li Xian-jin，Yuan Chun-li，Yu Hong，et al.Disintegrating efficiently of excess sludge by combined anaerobic treatment and ultrasonic cavitation［J］.Journal of Northeastern University (Natural Science)，2015，36(6):868-871.)
[12]Bao H，Yang H，Zhang H，et al.Improving methane productivity of waste activated sludge by ultrasound and alkali pretreatment in microbial electrolysis cell and anaerobic digestion coupled system［J］.Environmental Research，2019，180:108863.
[13]Alagz B A，Yenigün O，Erdincler A.Ultrasound assisted biogas production from co-digestion of wastewater sludges and agricultural wastes:comparison with microwave pre-treatment［J］.Ultrasonic Sonochemistry，2018，40:193-200.
[14]Yuan H，Guan R，Wachemo A C，et al.Enhancing methane production of excess sludge and dewatered sludge with combined low frequency CaO-ultrasonic pretreatment［J］.Bioresource Technology，2019，273:425-430.
[15]Wahidunnabi A K，Eskicioglu C.High pressure homogenization and two-phased anaerobic digestion for enhanced biogas conversion from municipal waste sludge［J］.Water Research，2014，66:430-446.
[16]Zhang S，Zhang P，Zhang G，et al.Enhancement of anaerobic sludge digestion by high-pressure homogenization［J］.Bioresource Technology，2012，118:496-501.
[17]Nah I W，Kang Y W，Hwang K Y，et al.Mechanical pretreatment of waste activated sludge for anaerobic digestion process［J］.Water Research，2000，34:2362-2368.
[18]Xie L，Terada A，Hosomi M.Disentangling the multiple effects of a novel high pressure jet device upon bacterial cell disruption［J］.Chemical Engineering Journal，2017，323:105-113.
[19]Suenaga T，Nishimura M，Yoshino H，et al.High-pressure jet device for activated sludge reduction:feasibility of sludge solubilization［J］.Biochemical Engineering Journal，2015，100:1-8.
[20]Yuan W，Qin L，Fang L.Desulfurization in the gas-continuous impinging stream gas-liquid reactor［J］.Chemical Engineering Science，2007，62(6):1814-1824.
[21]Wang G，Senocak I，Shyy W，et al.Dynamics of attached turbulent cavitating flows［J］.Progress in Aerospace Sciences，2001，37(6):551-581.
[22]韩进，朱彤，今井刚，等.基于高速转盘法的剩余污泥可溶化处理［J］.化工学报，2008，59(2):478-483.(Han Jin，Zhu Tong，Imai T，et al.Solubilization of excess sludge by high speed rotary disk［J］.Journal of Chemical Industry and Engineering(China)， 2008，59(2):478-483.)