剩余污泥和餐厨垃圾发酵液作为反硝化碳源可利用性研究

发布时间：2017-12-27 11:22

本文关键词：剩余污泥和餐厨垃圾发酵液作为反硝化碳源可利用性研究　出处：《水处理技术》2016年11期 　论文类型：期刊论文

【摘要】：利用剩余污泥和餐厨垃圾发酵液进行反硝化实验,考察其作为外加碳源的可利用性,并验证了发酵液对实际生活污水的脱氮效果。结果表明,相较于产酸总量而言,总挥发性脂肪酸(TVFAs)在发酵液中含量对反硝化效果影响更显著,且TVFAs含量越高,对应的比反硝化速率μ也越高。以pH为7.0、底物的质量浓度120 g/L、有机负荷率8 g/(L·d),污泥停留时间为8 d的实验条件产生的发酵液,TVFAs的质量分数大于85%,以其作为反硝化碳源能够获得较好的反硝化效果,最大比反硝化速率可达14.2 mg/(g·h)。将该发酵液用于生活污水的脱氮处理,当COD/ρ(NO~3~--N)为6时,TN去除率达到85%左右,出水TN的质量浓度低于6 mg/L。
[Abstract]:The denitrification experiments of excess sludge and food waste fermentation broth were carried out to investigate its availability as an external carbon source, and the effect of fermentation liquid on the actual domestic sewage was verified. The results showed that the total volatile fatty acids (TVFAs) had a more significant effect on denitrification than the total acid production, and the higher the TVFAs content, the higher the corresponding denitrification rate was. With pH concentration of 7, 120 of the substrate g/L, organic loading rate of 8 g/ (L - D), sludge retention time of fermentation broth produced experimental conditions of 8 D, the mass fraction of TVFAs is greater than 85%, as the carbon source for denitrification can obtain high denitrification rate, denitrification rate and maximum ratio up to 14.2 mg/ (G - H). The fermentation liquid for nitrogen removal from domestic sewage, when COD/ P (NO~3~--N) was 6, the removal rate of TN reached 85%, the concentration of effluent TN is less than 6 mg/L.
【作者单位】：苏州科技学院环境科学与工程学院;江苏省环境科学与工程重点实验室江苏省水处理技术与材料协同创新中心;
【基金】：国家自然科学基金项目(51308367) 苏州科技学院校基金(XKY201006) 江苏高校优势学科建设工程资助项目
【分类号】：X703;X799
【正文快照】： 表1不同酸化反应的发酵条件及TVFAs产量Tab.1 Different fermentation conditions of acidification and theproduction of TVFAs组别产量档次ρ(TVFAs)/(g·L-1)发酵条件p HR1R2R3R4R5注:OLR为有机负荷率,SRT为污泥停留时间。高中高中中低低28.5124.6421.8118.5812.177.07.07

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