CAJ | 학술논문

采用完全混合式厌氧反应器,比较了NaOH和Ca(OH)22种碱试剂对污泥厌氧发酵产酸的作用效果,结合氨吹脱作用考察了NH4+浓度的降低对各有机物水解酸化程度的影响.结果表明在pH值为10的条件下,以NaOH调节的体系中各种有机物尤其是挥发性脂肪酸(VFAs)的量明显高于以Ca(OH)2调节的体系.Ca(OH)2调节的体系中释放出的蛋白质有部分沉淀,磷酸盐含量也较低,小于40mg/L；氨吹脱的体系发酵液中氨氮含量减少了43%,增大了VFAs的积累量；在NaOH和氨吹脱的组合条件下,污泥水解酸化程度最好,SCOD为6732mg/L,蛋白质为2029mg/L,碳水化合物374mg/L,VFAs 总量2545mg/L,且氨氮含量低于200mg/L；分析认为氨吹脱作用增大 VFAs 积累量的原因主要是NH4+浓度的减小,促进了产酸菌对于碳水化合物的发酵.
채용완전혼합식염양반응기,비교료NaOH화Ca(OH)22충감시제대오니염양발효산산적작용효과,결합안취탈작용고찰료NH4+농도적강저대각유궤물수해산화정도적영향.결과표명재pH치위10적조건하,이NaOH조절적체계중각충유궤물우기시휘발성지방산(VFAs)적량명현고우이Ca(OH)2조절적체계.Ca(OH)2조절적체계중석방출적단백질유부분침정,린산염함량야교저,소우40mg/L；안취탈적체계발효액중안담함량감소료43%,증대료VFAs적적루량；재NaOH화안취탈적조합조건하,오니수해산화정도최호,SCOD위6732mg/L,단백질위2029mg/L,탄수화합물374mg/L,VFAs 총량2545mg/L,차안담함량저우200mg/L；분석인위안취탈작용증대 VFAs 적루량적원인주요시NH4+농도적감소,촉진료산산균대우탄수화합물적발효.
A series of completely mixed anaerobic reactors were operated to investigate different alkalis (NaOH and Ca (OH)2) performance on sludge disintegration and organics hydrolysis and acidification in sludge alkaline fermentation systems. In addition, ammonia stripping was combined with alkali adjustment to observe the effect of NH4+concentration on the hydrolysis and acidification effective of released organics. Results showed that at pH10, sludge disintegration as well as organics release, especially, volatile fatty acids (VFAs) was much higher in NaOH systems than that in Ca(OH)2 systems. However, part of soluble protein and PO43- were precipitated with Ca2+ in Ca(OH)2 systems. The PO43-concentration was less than 40mg/L in Ca(OH)2 systems. 43% of NH4+ was removed by ammonia stripping. The maximum hydrolysis and acidification performance was achieved in the NaOH adjustment and ammonia stripping system. The SCOD, protein, carbohydrate as well as total VFAs concentrations were 6732, 2029, 374 and 2545mg/L, respectively, and the NH4+ concentration was as low as 200mg/L. Analysis results also found that ammonia stripping could increase VFAs production by relieving the inhibition of NH4+ on acid-forming bacteria, and enhancing the fermentation of carbohydrate.