初始pH值对生物沥浸污泥同步脱水和灭菌的影响
|
摘要
以城市污泥脱水和病原微生物灭活为目标,以S~0和FeS_2为能量底物,利用嗜酸性硫杆菌复合菌群对初始p H值在3.0~10.0范围内的城市污泥进行生物沥浸处理。结果表明,当达到最佳沥浸时刻时,污泥比阻由(2.7~2.8)×10~(12)m/kg降至(2.1~3.9)×10~(11)m/kg;沉降率由68%~75%提高至79%~86%;对SS的去除率达到7.2%~38.3%。当初始p H值为5.0、生物沥浸48 h时,污泥脱水和沉降性能均达到最佳状态:比阻由2.8×10~(12)m/kg降为2.1×10~(11)m/kg,沉降率由69%升至83%,SS去除率为16.1%。在不同初始pH值下对病原微生物的灭活率均在99%以上,初始p H值对灭菌无影响。
Aiming for the municipal sludge dewatering and pathogen inactivation,compound bacterium of acidophilic Thiobacilli was used in bioleaching process,with zero-valent sulfur and iron disulfide as energy substrate,to treat municipal sludge with initial p H value ranging from 3. 0 to 10. 0. The results showed that when reaching the optimum bioleaching time,the SRF had decreased from( 2. 7-2. 8) × 10~(12)m/kg to( 2. 1-3. 9) × 10~(11)m/kg,the sedimentation rate had increased from 68%-75% to79%-86%,and the SS removal rate had reached up to 7. 2%-38. 3%. The dewatering and settling performance reached the optimum condition after 48 hours with an initial p H value of 5. 0. The SRF declined from 2. 8 × 10~(12)m/kg to 2. 1 × 10~(11)m/kg,the sedimentation rate rose from 69% to 83%,and the SS removal rate was 16. 1%. In addition,the inactivation rate of pathogenic microorganism was more than 99% with any initial pH values,i. e.,it was insensitive to initial p H values.
Aiming for the municipal sludge dewatering and pathogen inactivation,compound bacterium of acidophilic Thiobacilli was used in bioleaching process,with zero-valent sulfur and iron disulfide as energy substrate,to treat municipal sludge with initial p H value ranging from 3. 0 to 10. 0. The results showed that when reaching the optimum bioleaching time,the SRF had decreased from( 2. 7-2. 8) × 10~(12)m/kg to( 2. 1-3. 9) × 10~(11)m/kg,the sedimentation rate had increased from 68%-75% to79%-86%,and the SS removal rate had reached up to 7. 2%-38. 3%. The dewatering and settling performance reached the optimum condition after 48 hours with an initial p H value of 5. 0. The SRF declined from 2. 8 × 10~(12)m/kg to 2. 1 × 10~(11)m/kg,the sedimentation rate rose from 69% to 83%,and the SS removal rate was 16. 1%. In addition,the inactivation rate of pathogenic microorganism was more than 99% with any initial pH values,i. e.,it was insensitive to initial p H values.
引文
[1]鲁智礼,庞朝辉,王海燕,等.污泥减量化技术研究进展[J].化工环保,2011,31(6):506-510.
[2]周立祥.污泥生物沥浸处理技术及其工程应用[J].南京农业大学学报,2012,35(5):154-166.
[3]刘奋武,周立祥,周俊,等.生物沥浸处理提高城市污泥脱水性能的中试研究:批式运行模式[J].环境科学,2011,32(10):2993-2998.
[4]杨慧敏,王凯军,李明华.生物沥浸法去除不同初始p H值猪粪中的重金属[J].环境科学与技术,2010,33(6):154-159.
[5]Zheng G Y,Zhou L X,Wang S M.An acid-tolerant heterotrophic microorganism role in improving tannery sludge bioleaching conducted in successive multi-batch reaction systems[J].Environ Sci Technol,2009,43(11):4151-4156.
[6]刘奋武,周立祥.不同能源物质配合及化学强化对生物沥浸法提高城市污泥脱水性能的效果[J].环境科学学报,2009,29(5):974-979.
[7]Chen S Y,Lin J G.Factors affecting bioleaching of metal contaminated sediment with sulfur-oxidizing bacteria[J].Water Sci Technol,2000,41(12):263-270.
[8]李超.嗜酸性复合硫杆菌对城市污泥的生物沥浸效果及机理研究[D].南京:南京农业大学,2007.
[9]肖凌鹏,张盼月.生物淋滤改善城市污泥的脱水性能[J].环境工程学报,2012,6(8):2793-2797.
[10]宋永伟,王电站,刘奋武,等.低温条件下污泥静置沉降时间对城市生物沥浸污泥脱水性能的影响[J].环境科学学报,2012,32(4):815-820.
[11]李超,周立祥,王世梅.复合硫杆菌生物浸出污泥中重金属的效果及与p H和ORP的关系[J].环境科学学报,2008,28(6):1155-1160.
[12]郑学成.基于种间相互作用的根瘤菌、红酵母菌对氧化亚铁硫杆菌浸出黄铜尾矿的影响研究[D].重庆:重庆大学,2014.
[13]张雁生.细菌浸出黄铜矿过程中矿物表面化学变化的研究[D].长沙:中南大学,2011.
[14]李凌凌.嗜酸硫杆菌浸出中低品位磷矿及其浸矿机理研究[D].武汉:武汉科技大学,2014.
[15]黄明.城市污水污泥中重金属的生物沥滤技术试验研究[D].重庆:重庆大学,2009.
[16]Liao B Q,Droppo I G,Leppord G G,et al.Surface properties of sludge and their role in bioflocculation and settle ability[J].Water Res,2001,35(2):339-350.
[17]霍敏波,郑冠宇,梁剑茹,等.生物沥浸处理中微生物菌群和胞外聚合物对城市污泥脱水性能的影响[J].环境科学学报,2014,34(9):2199-2204.
[18]Zheng G Y,Wang S M,Zhou L X.Elimination of pathogens in municipal sludge and tannery sludge by bioleaching approach[J].Environ Sci,2007,28(7):1539-1542.
[19]Yu R,Shi L,Gu G,et al.The shift of microbial community under the adjustment of initial and processing p H during bioleaching of chalcopyrite concentrate by moderate Thermophiles[J].Bioresour Technol,2014,162(6):300-307.
[20]Davis-Belmar C S,Gallardo I,Demergasso C,et al.Effect of organic extractant LIX 84IC,p H and temperature changes on bioleaching microorganisms during SX treatment[J].Hydrometallurgy,2012,129/130:135-139.
[2]周立祥.污泥生物沥浸处理技术及其工程应用[J].南京农业大学学报,2012,35(5):154-166.
[3]刘奋武,周立祥,周俊,等.生物沥浸处理提高城市污泥脱水性能的中试研究:批式运行模式[J].环境科学,2011,32(10):2993-2998.
[4]杨慧敏,王凯军,李明华.生物沥浸法去除不同初始p H值猪粪中的重金属[J].环境科学与技术,2010,33(6):154-159.
[5]Zheng G Y,Zhou L X,Wang S M.An acid-tolerant heterotrophic microorganism role in improving tannery sludge bioleaching conducted in successive multi-batch reaction systems[J].Environ Sci Technol,2009,43(11):4151-4156.
[6]刘奋武,周立祥.不同能源物质配合及化学强化对生物沥浸法提高城市污泥脱水性能的效果[J].环境科学学报,2009,29(5):974-979.
[7]Chen S Y,Lin J G.Factors affecting bioleaching of metal contaminated sediment with sulfur-oxidizing bacteria[J].Water Sci Technol,2000,41(12):263-270.
[8]李超.嗜酸性复合硫杆菌对城市污泥的生物沥浸效果及机理研究[D].南京:南京农业大学,2007.
[9]肖凌鹏,张盼月.生物淋滤改善城市污泥的脱水性能[J].环境工程学报,2012,6(8):2793-2797.
[10]宋永伟,王电站,刘奋武,等.低温条件下污泥静置沉降时间对城市生物沥浸污泥脱水性能的影响[J].环境科学学报,2012,32(4):815-820.
[11]李超,周立祥,王世梅.复合硫杆菌生物浸出污泥中重金属的效果及与p H和ORP的关系[J].环境科学学报,2008,28(6):1155-1160.
[12]郑学成.基于种间相互作用的根瘤菌、红酵母菌对氧化亚铁硫杆菌浸出黄铜尾矿的影响研究[D].重庆:重庆大学,2014.
[13]张雁生.细菌浸出黄铜矿过程中矿物表面化学变化的研究[D].长沙:中南大学,2011.
[14]李凌凌.嗜酸硫杆菌浸出中低品位磷矿及其浸矿机理研究[D].武汉:武汉科技大学,2014.
[15]黄明.城市污水污泥中重金属的生物沥滤技术试验研究[D].重庆:重庆大学,2009.
[16]Liao B Q,Droppo I G,Leppord G G,et al.Surface properties of sludge and their role in bioflocculation and settle ability[J].Water Res,2001,35(2):339-350.
[17]霍敏波,郑冠宇,梁剑茹,等.生物沥浸处理中微生物菌群和胞外聚合物对城市污泥脱水性能的影响[J].环境科学学报,2014,34(9):2199-2204.
[18]Zheng G Y,Wang S M,Zhou L X.Elimination of pathogens in municipal sludge and tannery sludge by bioleaching approach[J].Environ Sci,2007,28(7):1539-1542.
[19]Yu R,Shi L,Gu G,et al.The shift of microbial community under the adjustment of initial and processing p H during bioleaching of chalcopyrite concentrate by moderate Thermophiles[J].Bioresour Technol,2014,162(6):300-307.
[20]Davis-Belmar C S,Gallardo I,Demergasso C,et al.Effect of organic extractant LIX 84IC,p H and temperature changes on bioleaching microorganisms during SX treatment[J].Hydrometallurgy,2012,129/130:135-139.