|
|
|
Use of gamma-irradiation pretreatment for enhancement
of anaerobic digestibility of sewage sludge |
| YUAN Shoujun1, ZHENG Zheng2, YU Xin2, ZHAO Yongfu2, MU Yanyan3 |
| 1.School of Civil Engineering, Hefei University of Technology; 2.State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University; 3.Zhongan Zhihuan Technology Assessment Center |
|
|
|
|
Abstract The effects of ?-irradiation pretreatment on anaerobic digestibility of sewage sludge was investigated in this paper. Parameters like solid components, soluble components, and biogas production of anaerobic digestion experiment for sewage sludge were measured. The values of these parameters were compared before and after ?-irradiation pretreatment. Total solid (TS), volatile solid (VS), suspended solid (SS), volatile suspended solid (VSS), and average floc size of samples decreased after ?-irradiation treatment. Besides, floc size distribution of sewage sludge shifted from 80–100 ?m to 0–40 ?m after ?-irradiation treatment at the doses from 0 to 30 kGy, which indicated the disintegration of sewage sludge. Moreover, microbe cells of sewage sludge were ruptured by ?-irradiation treatment, which resulted in the release of cytoplasm and increase of soluble chemical oxygen demand (SCOD). Both sludge disintegration and microbe cells rupture enhanced the subsequent anaerobic digestion process, which was demonstrated by the increase of accumulated biogas production. Compared with digesters fed with none irradiated sludge, the accumulated biogas production increased 44, 98, and 178 mL for digesters fed sludge irradiated at 2.48, 6.51, and 11.24 kGy, respectively. The results indicated that ?-irradiation pretreatment could effectively enhance anaerobic digestibility of sewage sludge, and correspondingly, could accelerate hydrolysis process, shorten sludge retention time of sludge anaerobic digestion process.
|
|
Issue Date: 05 June 2008
|
|
| 1 |
Lin J G Chang C N Chang S C Enhancement of anaerobic digestion of waste activated sludgeby alkaline solubilizationBioresource Technology 1997 628590.
doi:10.1016/S0960‐8524(97)00121‐1
|
| 2 |
Eastman J A Ferguson J F Solubilization of particulateorganic carbon during the acid phrase of anaerobic digestionJournal WPCF 1981 53(3)352365
|
| 3 |
Neyens E Baeyens J A review of thermal sludgepre-treatment processes to improve dewaterabilityJournal of Hazardous Materials 2003 98(1–3)5167.
doi:10.1016/S0304‐3894(02)00320‐5
|
| 4 |
Navia R Soto M Vidal G Alkaline pretreatment of kraft mill sludge to improve itsanaerobic digestionBulletin of EnvironmentalContamination and Toxicology 2002 69(6)869876.
doi:10.1007/s00128‐002‐0140‐4
|
| 5 |
Tiehm A Nickel K Zellhorn M Ultrasonic waste activated sludge disintegration for improvinganaerobic stabilizationWater Research 2001 35(8)20032009.
doi:10.1016/S0043‐1354(00)00468‐1
|
| 6 |
Weemaes M Grootaerd H Simoens F Anaerobic digestion of ozonized biosolidsWater Research 2000 34(8)23302336.
doi:10.1016/S0043‐1354(99)00373‐5
|
| 7 |
Shin K S Kang H Electron beam pretreatmentof sewage sludge before anaerobic digestionApplied Biochemistry and Biotechnology 2003 109(1–3)227239.
doi:10.1385/ABAB:109:1‐3:227
|
| 8 |
Camacho P Deleris S Geaugey V A comparative study between mechanical, thermal and oxidativedisintegration techniques of waste activated sludgeWater Science and Technology 2002 46(10)7987
|
| 9 |
Mustapha S Forster C F Examination into the gammairradiation of activated sludgeEnzyme andMicrobial Technology 1985 7179181.
doi:10.1016/0141‐0229(85)90061‐4
|
| 10 |
Rawat K P Sharma A Rao S M Microbiological and physicochemical analysis of radiationdisinfected municipal sewageWater Research 1998 32(3)737740.
doi:10.1016/S0043‐1354(97)00220‐0
|
| 11 |
Trouqué S L Forster C F The use of ultrasound and γ-irradiationas pre-treatments for the anaerobic digestion of waste activated sludgeat mesophilic and thermophilic temperaturesBioresource Technology 2002 84113118.
doi:10.1016/S0960‐8524(02)00038‐X
|
| 12 |
He Y L AnaerobicTreatment of WastewaterBeijing, ChinaChina Light Industry Press 1998 536538 (in Chinese)
|
| 13 |
Mu Y Y Mechanismand effect of γ-irradiation pretreatment on anaerobic digestibilityof sludgeDissertation for the Master'sDegreeNanjing, ChinaNanjing University 2005 2324 (in Chinese)
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
