淘米水内在发酵特性与VFAs的量化关系变化规律
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摘要
为了研究餐厨类废弃物定向产挥发性脂肪酸(Volatile Fatty Acids,VFAs)的基质释放机理,将淘米水作为单一研究对象,探究其分别在原始状态和不同p H值下VS、SCOD、氨氮、可溶性糖与VFAs之间的量化关系和关联程度。结果表明,淘米水原始状态下有机质转化为VFAs的转化率较低,调节p H值使内在发酵特性含量和VFAs总量有显著增加,其中p H=7对其影响最大,VFAs产率(以VS计)为267. 14 mg/g,VFAs/SCOD比值为55. 84%,氨氮溶出量(以VS计) 20. 24 mg/g,可溶性糖转化率为88. 3%。VS和SCOD与VFAs关联程度大,其次是氨氮、可溶性糖,VFAs大部分由有机质水解产生,少部分来自氨氮溶出、可溶性糖转化。p H值不会改变量化和关联趋势,但使产酸天数和发酵周期提前。
In order to study the mechanism of substrate release of food waste to produce volatile fatty acids( VFAs)directionally,as a single research object,the rice wash was studied,to explore the relevance and relationship among volatile solid( VS),soluble chemical oxygen demand( SCOD),ammonia nitrogen concentration,soluble sugar and VFAs concentration under original state and different p H. The results showed that the conversion rate of organic matter into VFAs under original state was lower than other p H,the content of intrinsic fermentation characteristics and VFAs were significantly increased after adjusting p H,especially under the p H of 7,the yield of VFAs was 267. 14mg/g,VFAs/SCOD was 55. 84%,ammonia nitrogen concentration was 20. 24 mg/g,and the conversion rate of soluble sugar was 88. 3%. The relevance between VS,SCOD and VFAs were higher than ammonia nitrogen concentration and soluble sugar,most of VFAs were produced by the hydrolysis of organic matter,and a small part came from the dissolution of ammonia nitrogen and the conversion of soluble sugar. p H did not change the quantitative and relevant trends,but advanced the days of acid production and the fermentation cycle.
In order to study the mechanism of substrate release of food waste to produce volatile fatty acids( VFAs)directionally,as a single research object,the rice wash was studied,to explore the relevance and relationship among volatile solid( VS),soluble chemical oxygen demand( SCOD),ammonia nitrogen concentration,soluble sugar and VFAs concentration under original state and different p H. The results showed that the conversion rate of organic matter into VFAs under original state was lower than other p H,the content of intrinsic fermentation characteristics and VFAs were significantly increased after adjusting p H,especially under the p H of 7,the yield of VFAs was 267. 14mg/g,VFAs/SCOD was 55. 84%,ammonia nitrogen concentration was 20. 24 mg/g,and the conversion rate of soluble sugar was 88. 3%. The relevance between VS,SCOD and VFAs were higher than ammonia nitrogen concentration and soluble sugar,most of VFAs were produced by the hydrolysis of organic matter,and a small part came from the dissolution of ammonia nitrogen and the conversion of soluble sugar. p H did not change the quantitative and relevant trends,but advanced the days of acid production and the fermentation cycle.
引文
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[12]张波,史红钻,张丽丽,等.p H对厨余废物两相厌氧消化中水解和酸化过程的影响[J].环境科学学报,2005(5):665-669.
[13]REDDY G,ALTAF M,NAVEENA B J,et al.Amylolytic bacterial lactic acid fermentation:A review[J].Bioresource Technology,2008,26(1):22-34.
[14]JIANG J,ZHANG Y,LI K,et al.Volatile fatty acids production from food waste:Effects of p H,temperature,and organic loading rate[J].Bioresource Technology,2013,143:525-530.
[15]WANG K,YIN J,SHEN D S,et al.Anaerobic digestion of food waste for volatile fatty acids(VFAs)production with different types of inoculum:Effect of p H[J].Bioresource Technology,2014,161:8395-8401.
[16]Bouallagui H,Touhami Y,Ben C R,et al.Bioreactor performance in aerobic digestion of fruit and vegetable wastes[J].Process Biochemistry,2005,40(3/4):989-995.
[17]ZHANG C S,XIAO G,PENG L Y,et al.The anaerobic co-digestion of food waste and cattle manure[J].Bioresource Technology,2013,2(129):170-176.
[18]ALBUQUERQUEl M G E,EIROA M,TORRES C,et al.Strategies for the development of a side stream process for polyhydroxyalkanoate(PHA)production from sugar cane molasses[J].Journal of Biotechnology,2007,130(4):411-421.
[2]KYTHREOTOU N,FLORIDES G,TASSOU S A.A review simple to scientific models for anaerobic digestion renew[J].Energy,2014,71:701-714.
[3]吴清莲.餐厨垃圾厌氧发酵产挥发性脂肪酸的研究[D].哈尔滨:哈尔滨工业大学,2015.
[4]FRISON N,KATSOU E,MALAMIS S,et al.Development of a novel process integrating the treatment of sludge reject water and the production of polyhydroxyalkanoates(PHAs)[J].Environmental Science&Technology,2015,49(18):10877-10885.
[5]ARIUNBAATAR J,PANICO A,ESPOSITO G,et al.Pretreatment methods to enhance anaerobic digestion of organic solid waste[J].Applied Energy,2014,123(3):143-156.
[6]ALVAREZl J M,DOSTA J,GüIZA M S R,et al.A critical review on anaerobic co-digestion achievements between2010 and 2013[J].Renewable and Sustainable Energy Reviews,2014,36:412-427.
[7]DAHIYA S,SARKAR O,SWAMY Y V,et al.Acidogenic fermentation of food waste for volatile fatty acid production with co-generation of biohydrogen[J].Bioresource Technology,2015,182:103-113.
[8]王延昌,袁巧霞,谢景欢,等.餐厨垃圾厌氧发酵特性的研究[J].环境工程学报,2009,3(9):1677-1682.
[9]张胜,徐武宁,严永红,等.餐厨垃圾废水发酵特征的探究[J].环境污染与防治,2013,35(12):29-34.
[10]张玉静,蒋建国,王佳明,等.p H值对餐厨垃圾厌氧发酵产挥发性脂肪酸的影响[J].中国环境科学,2013(4):680-684.
[11]裴占江,刘杰,王栗,等.p H值调控对餐厨垃圾厌氧消化效率的影响[J].中国沼气,2015,33(1):17-21.
[12]张波,史红钻,张丽丽,等.p H对厨余废物两相厌氧消化中水解和酸化过程的影响[J].环境科学学报,2005(5):665-669.
[13]REDDY G,ALTAF M,NAVEENA B J,et al.Amylolytic bacterial lactic acid fermentation:A review[J].Bioresource Technology,2008,26(1):22-34.
[14]JIANG J,ZHANG Y,LI K,et al.Volatile fatty acids production from food waste:Effects of p H,temperature,and organic loading rate[J].Bioresource Technology,2013,143:525-530.
[15]WANG K,YIN J,SHEN D S,et al.Anaerobic digestion of food waste for volatile fatty acids(VFAs)production with different types of inoculum:Effect of p H[J].Bioresource Technology,2014,161:8395-8401.
[16]Bouallagui H,Touhami Y,Ben C R,et al.Bioreactor performance in aerobic digestion of fruit and vegetable wastes[J].Process Biochemistry,2005,40(3/4):989-995.
[17]ZHANG C S,XIAO G,PENG L Y,et al.The anaerobic co-digestion of food waste and cattle manure[J].Bioresource Technology,2013,2(129):170-176.
[18]ALBUQUERQUEl M G E,EIROA M,TORRES C,et al.Strategies for the development of a side stream process for polyhydroxyalkanoate(PHA)production from sugar cane molasses[J].Journal of Biotechnology,2007,130(4):411-421.