共查询到17条相似文献,搜索用时 500 毫秒
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采用混合式厌氧反应器,以酒槽废水为基质,在厌氧体系中投加不同的浓度的SO^2-3,和Cl^-,研究盐离子日加入量和累积量与厌氧体系抑制程度的关系,得出维持厌氧体系正常运行把允许的日加入量(SO^2-4,低于144mg/L,Cl^-低于3195mg/L)和累积浓度(SO^2-4,低于300mg/L,Cl^-低于20000mg/L),研究了污泥对SO^2-4,和Cl^-的负荷,在SO^2-4/VS浓度 相似文献
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生物流化床在焦化废水治理中的应用 总被引:13,自引:0,他引:13
采用厌氧 缺氧 好氧工艺流程,以生物膜作为厌氧、缺氧反应器,循环式生物流化床作为好氧反应器进行了焦化废水治理中试应用研究。应用结果表明,上述工艺流程用于焦化废水治理是可行的。当系统进水CODCr浓度小于1200mg/L,系统水力停留时间为44h时,出水CODCr小于250mg/L;较高的进水NH3 N浓度可严重影响NH3 N去除,但对CODCr去除几乎无影响 相似文献
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铬对厌氧生物处理过程的抑制作用 总被引:7,自引:3,他引:4
本文研究了重金属铬离子(Cr~(3+)和Cr~(6+))对厌氧生物处理过程抑制作用的规律.结果表明,Cr~(3+)日引入量分别在低于20mg/L,36—109mg/L和高于145mg/L时,厌氧体系分别受到轻度、中度和重度抑制(即引起产气率下降分别为低于20%、20—40%和大于40%);日引入Cr~(6+)浓度小于14mg/L,无抑制作用;36mg/L或高于70mg/L时,厌氧体系分别受到中度或重度抑制.单位污泥干重所允许承受Cr~(3+)和Cr~(6+)日引入量分别为低于0.1%(62.6 mg-N/kg)和0.04%(44.4mg-N/kg).在引入Cr~(3+)的情况下,维持厌氧体系正常运行的溶解态铬离子浓度应小于0.5mg/L,超过2.5mg/L时,体系受到重度抑制;在引入Cr~(6+)的情况下,允许浓度为 0.4 mg/L,超过2.8 mg/L为重度抑制. 相似文献
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AnaerobicbiodegradabilityofterephthalicacidanditsinhibitoryeffectonanaerobicdigestionKuangXin;WangJusi(ResearchCenterforEco-E... 相似文献
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采用半连续实验方法,研究了中温厌氧条件下硫酸盐的还原行为及产生抑制作用的机理.实验结果表明,SO_4~(2-)在厌氧体系中被硫酸盐还原菌(SRB)全部或部分还原为硫化物,其还原率与SO_4~(2-)累积加入浓度有关.还原产物的形态与体系中pH值有关,较高的pH值(7.6—8.4)使体系中H_3S含量下降.SO_4~(2-)对厌氧体系的抑制与SO_4~(2-)还原过程中SRB与产甲烷菌(MRB)的底物竞争及还原产物的毒性相关.前者受COD/SO_4~(2-)比值的影响,比值大于7,对厌氧体系只产生轻度抑制作用.而后者与沼气中H_2S含量有直接关系,沼气中H_3S含量小于40mg/L时,基本不产生抑制作用. 相似文献
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Lu Huang Xin Wen Yan Wang Yongde Zou Baohua M Xindi Liao Juanboo Liang Yinbao Wu 《环境科学学报(英文版)》2014,26(10):2001-2006
Effects of antibiotic residues on methane production in anaerobic digestion are commonly studied using the following two antibiotic addition methods:(1) adding manure from animals that consume a diet containing antibiotics, and(2) adding antibiotic-free animal manure spiked with antibiotics. This study used chlortetracycline(CTC) as a model antibiotic to examine the effects of the antibiotic addition method on methane production in anaerobic digestion under two different swine wastewater concentrations(0.55 and 0.22 mg CTC/g dry manure). The results showed that CTC degradation rate in which manure was directly added at 0.55 mg CTC/g(HSPIKE treatment) was lower than the control values and the rest of the treatment groups. Methane production from the HSPIKEtreatment was reduced(p 〈 0.05) by 12% during the whole experimental period and 15% during the first 7 days. The treatments had no significant effect on the pH and chemical oxygen demand value of the digesters, and the total nitrogen of the0.55 mg CTC/kg manure collected from mediated swine was significantly higher than the other values. Therefore, different methane production under different antibiotic addition methods might be explained by the microbial activity and the concentrations of antibiotic intermediate products and metabolites. Because the primary entry route of veterinary antibiotics into an anaerobic digester is by contaminated animal manure, the most appropriate method for studying antibiotic residue effects on methane production may be using manure from animals that are given a particular antibiotic, rather than adding the antibiotic directly to the anaerobic digester. 相似文献