[Objectives]To treat pig farm wastewater and solve the problem of pollution caused by it to surface water or groundwater.[Methods]Fe and Zn/biochar(AC)was prepared by dipping method using pig manure-derived biochar as...[Objectives]To treat pig farm wastewater and solve the problem of pollution caused by it to surface water or groundwater.[Methods]Fe and Zn/biochar(AC)was prepared by dipping method using pig manure-derived biochar as carrier.The preparation conditions were investigated,and the screened metal-loaded biochar was characterized.Pig farm waste water was treated with metal-loaded biochar-H2O2 catalytic oxidation method.[Results]At the COD concentration of 2904 mg/L,0.02 g Zn/AC and 0.005 mL H2O2 showed the highest COD removal rate(qe)from pig breeding wastewater under conditions of reaction time of 8 h,pH value of 7 and temperature of 55℃,reaching 70.98%.[Conclusions]Fe or Zn-loaded biochar made from pig manure-derived activated carbon has a certain catalytic capacity for the actual oxidation treatment of pig farm wastewater.The activity of Zn/AC was higher,and its COD removal rate from pig farm wastewater was also higher.展开更多
为探明不同热解温度生物炭添加对猪粪中温厌氧消化产气的影响,以400、500、600℃热解制成的麦秸生物炭(BC400、BC500、BC600)为研究对象,采用批次发酵试验,探讨了生物炭添加对猪粪中温(37±1)℃厌氧发酵产气特性的影响。研究结果表...为探明不同热解温度生物炭添加对猪粪中温厌氧消化产气的影响,以400、500、600℃热解制成的麦秸生物炭(BC400、BC500、BC600)为研究对象,采用批次发酵试验,探讨了生物炭添加对猪粪中温(37±1)℃厌氧发酵产气特性的影响。研究结果表明:麦秸热解生物炭可显著(P<0.05)提高猪粪发酵系统的产气潜力和甲烷含量,其影响从大到小依次为BC600>BC500>BC400。厌氧发酵49 d期间,添加生物炭处理的产气量和产甲烷量分别为260.7~288.7 m L·g^(-1)VS和163.7~185.5 m L·g^(-1)VS,较纯猪粪处理提高了77.1%~96.1%和78.1%~101.8%。同时,添加生物炭可明显提高猪粪厌氧发酵系统的消化效率(T90),缩短厌氧发酵的延滞期。不同热解温度麦秸生物炭对猪粪厌氧消化产气特征的影响明显不同,对畜禽养殖场沼气工程运行中的物料选择和条件优化有实际的指导意义。展开更多
基金Scientific and Technological Innovation Project of Jingjiang City,Jiangsu Province(HDCXJ6001).
文摘[Objectives]To treat pig farm wastewater and solve the problem of pollution caused by it to surface water or groundwater.[Methods]Fe and Zn/biochar(AC)was prepared by dipping method using pig manure-derived biochar as carrier.The preparation conditions were investigated,and the screened metal-loaded biochar was characterized.Pig farm waste water was treated with metal-loaded biochar-H2O2 catalytic oxidation method.[Results]At the COD concentration of 2904 mg/L,0.02 g Zn/AC and 0.005 mL H2O2 showed the highest COD removal rate(qe)from pig breeding wastewater under conditions of reaction time of 8 h,pH value of 7 and temperature of 55℃,reaching 70.98%.[Conclusions]Fe or Zn-loaded biochar made from pig manure-derived activated carbon has a certain catalytic capacity for the actual oxidation treatment of pig farm wastewater.The activity of Zn/AC was higher,and its COD removal rate from pig farm wastewater was also higher.
文摘为探明不同热解温度生物炭添加对猪粪中温厌氧消化产气的影响,以400、500、600℃热解制成的麦秸生物炭(BC400、BC500、BC600)为研究对象,采用批次发酵试验,探讨了生物炭添加对猪粪中温(37±1)℃厌氧发酵产气特性的影响。研究结果表明:麦秸热解生物炭可显著(P<0.05)提高猪粪发酵系统的产气潜力和甲烷含量,其影响从大到小依次为BC600>BC500>BC400。厌氧发酵49 d期间,添加生物炭处理的产气量和产甲烷量分别为260.7~288.7 m L·g^(-1)VS和163.7~185.5 m L·g^(-1)VS,较纯猪粪处理提高了77.1%~96.1%和78.1%~101.8%。同时,添加生物炭可明显提高猪粪厌氧发酵系统的消化效率(T90),缩短厌氧发酵的延滞期。不同热解温度麦秸生物炭对猪粪厌氧消化产气特征的影响明显不同,对畜禽养殖场沼气工程运行中的物料选择和条件优化有实际的指导意义。