相同pH條件下,共同作用體系中蛋白濃度比單獨溶菌酶作用系統和單獨烷基多糖苷作(zuo)用系(xi)統中(zhong)的(de)(de)蛋白(bai)濃(nong)(nong)(nong)度之(zhi)和要高(gao)。當pH分(fen)別(bie)為4、6、8和11時,共同作(zuo)用系(xi)統中(zhong)的(de)(de)蛋白(bai)濃(nong)(nong)(nong)度比(bi)單獨溶(rong)菌酶作(zuo)用系(xi)統和單獨烷(wan)基多糖苷(gan)作(zuo)用系(xi)統中(zhong)的(de)(de)蛋白(bai)濃(nong)(nong)(nong)度之(zhi)和分(fen)別(bie)高(gao)54.82、25.07、38.15和166.25 mg/L。說明聯合(he)作(zuo)用系(xi)統的(de)(de)水(shui)(shui)解(jie)效(xiao)(xiao)果(guo)(guo)(guo)在(zai)(zai)酸性(xing)和堿性(xing)條件下(xia)有所提升(sheng)。在(zai)(zai)酸性(xing)條件下(xia),濃(nong)(nong)(nong)度差(cha)值比(bi)在(zai)(zai)中(zhong)性(xing)和弱酸堿性(xing)條件大,水(shui)(shui)解(jie)效(xiao)(xiao)果(guo)(guo)(guo)增強(qiang);在(zai)(zai)堿性(xing)條件下(xia),濃(nong)(nong)(nong)度差(cha)值提高(gao),水(shui)(shui)解(jie)效(xiao)(xiao)果(guo)(guo)(guo)增強(qiang)。當pH=11時,蛋白(bai)濃(nong)(nong)(nong)度差(cha)值達到大,增強(qiang)效(xiao)(xiao)果(guo)(guo)(guo)明顯。即酸性(xing)和堿性(xing)條件下(xia)有利于促(cu)(cu)進(jin)溶(rong)菌酶和烷(wan)基多糖苷(gan)聯合(he)作(zuo)用的(de)(de)污泥水(shui)(shui)解(jie)溶(rong)出(chu)蛋白(bai)的(de)(de)效(xiao)(xiao)果(guo)(guo)(guo),在(zai)(zai)pH=11時,2h內(nei)促(cu)(cu)進(jin)效(xiao)(xiao)果(guo)(guo)(guo)為顯著。
pH對多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)的作用(yong)(yong)效果更為復雜。如圖4-4(a),當pH<8時(shi),pH對促進各個體系(xi)(xi)(xi)(xi)(xi)中(zhong)多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)溶出的影響(xiang)不大(da)。當在堿(jian)(jian)性(xing)(xing)(xing)條(tiao)(tiao)件(jian)(jian)下(xia)(xia)時(shi),單(dan)獨(du)作用(yong)(yong)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)的多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)含(han)量(liang)明顯(xian)提升,尤其是(shi)(shi)單(dan)獨(du)溶菌(jun)酶作用(yong)(yong)體系(xi)(xi)(xi)(xi)(xi)和(he)(he)單(dan)獨(du)污(wu)泥水(shui)解體系(xi)(xi)(xi)(xi)(xi)。而聯(lian)合(he)作用(yong)(yong)受Ph變化的影響(xiang)相(xiang)對較小。當pH分(fen)別(bie)為4、6、8和(he)(he)11時(shi),聯(lian)合(he)作用(yong)(yong)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)剩(sheng)余污(wu)泥的多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)含(han)量(liang)分(fen)別(bie)為1616.21、1741.13、1739.73和(he)(he)1863.87 mg/L。與(yu)相(xiang)同(tong)pH條(tiao)(tiao)件(jian)(jian)下(xia)(xia)單(dan)獨(du)烷(wan)基多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)苷作用(yong)(yong)體系(xi)(xi)(xi)(xi)(xi)中(zhong)的多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)含(han)量(liang)相(xiang)比,聯(lian)合(he)作用(yong)(yong)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)的多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)濃度(du)分(fen)別(bie)增長(chang)了(le)153.71%、172.02%、163.21%和(he)(he)114.70%;與(yu)相(xiang)同(tong)pH條(tiao)(tiao)件(jian)(jian)下(xia)(xia)單(dan)獨(du)溶菌(jun)酶作用(yong)(yong)體系(xi)(xi)(xi)(xi)(xi)中(zhong)的多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)含(han)量(liang)相(xiang)比,聯(lian)合(he)作用(yong)(yong)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)中(zhong)的多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)濃度(du)分(fen)別(bie)增長(chang)了(le)4340.25%、8012.58%、6169.01%和(he)(he)558.51%;與(yu)單(dan)獨(du)污(wu)泥作用(yong)(yong)體系(xi)(xi)(xi)(xi)(xi)相(xiang)比分(fen)別(bie)增長(chang)了(le)5905.98%、10476.60%、9700.57%和(he)(he)725.70%。說明無(wu)論是(shi)(shi)酸性(xing)(xing)(xing),弱酸堿(jian)(jian)性(xing)(xing)(xing)還是(shi)(shi)堿(jian)(jian)性(xing)(xing)(xing)條(tiao)(tiao)件(jian)(jian)下(xia)(xia),聯(lian)合(he)作用(yong)(yong)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)與(yu)單(dan)獨(du)作用(yong)(yong)系(xi)(xi)(xi)(xi)(xi)統(tong)(tong)相(xiang)比能顯(xian)著提高污(wu)泥中(zhong)多(duo)(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)(tang)含(han)量(liang)。
同樣,相同pH條(tiao)件(jian)(jian)(jian)下,共同作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)體系中(zhong)(zhong)(zhong)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)濃(nong)度(du)比單(dan)獨溶(rong)菌(jun)酶(mei)(mei)作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)系統(tong)(tong)和(he)單(dan)獨烷(wan)(wan)基(ji)(ji)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)苷作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)系統(tong)(tong)中(zhong)(zhong)(zhong)的(de)(de)(de)(de)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)濃(nong)度(du)之(zhi)和(he)要高(gao)。當(dang)pH分別為4、6、8和(he)11時(shi),共同作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)系統(tong)(tong)中(zhong)(zhong)(zhong)的(de)(de)(de)(de)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)濃(nong)度(du)比單(dan)獨溶(rong)菌(jun)酶(mei)(mei)作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)系統(tong)(tong)和(he)單(dan)獨烷(wan)(wan)基(ji)(ji)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)苷作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)系統(tong)(tong)中(zhong)(zhong)(zhong)的(de)(de)(de)(de)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)濃(nong)度(du)之(zhi)和(he)分別高(gao)942.77、1079.60、1051.02和(he)712.70 mg/L。可以看出(chu)(chu),在酸(suan)性(xing),堿性(xing)以及中(zhong)(zhong)(zhong)性(xing)反(fan)應條(tiao)件(jian)(jian)(jian)范圍內,烷(wan)(wan)基(ji)(ji)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)苷和(he)溶(rong)菌(jun)酶(mei)(mei)聯合作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)在短時(shi)間內能對(dui)污泥(ni)(ni)微(wei)生物(wu)細胞中(zhong)(zhong)(zhong)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)的(de)(de)(de)(de)釋(shi)出(chu)(chu)有較大的(de)(de)(de)(de)促(cu)進作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)。弱酸(suan)性(xing)和(he)弱堿性(xing)條(tiao)件(jian)(jian)(jian)下,多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)濃(nong)度(du)差(cha)值(zhi)達到大,增強效果(guo)為明顯。而(er)在酸(suan)性(xing)和(he)堿性(xing)條(tiao)件(jian)(jian)(jian)下,多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)濃(nong)度(du)差(cha)值(zhi)降低,增強效果(guo)略(lve)有降低。這可能是(shi)因(yin)為在中(zhong)(zhong)(zhong)性(xing)反(fan)應條(tiao)件(jian)(jian)(jian)范圍下,溶(rong)菌(jun)酶(mei)(mei)和(he)烷(wan)(wan)基(ji)(ji)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)苷的(de)(de)(de)(de)聯合作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)已經大量(liang)解(jie)析(xi)溶(rong)出(chu)(chu)EPS中(zhong)(zhong)(zhong)的(de)(de)(de)(de)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)物(wu)質,即使(shi)改(gai)變溶(rong)液的(de)(de)(de)(de)pH,提(ti)升(sheng)(sheng)溶(rong)出(chu)(chu)的(de)(de)(de)(de)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)物(wu)質含量(liang)有限。而(er)單(dan)獨作(zuo)(zuo)(zuo)(zuo)(zuo)用(yong)(yong)下污泥(ni)(ni)的(de)(de)(de)(de)EPS并未大量(liang)解(jie)析(xi),當(dang)改(gai)變pH時(shi),將極大的(de)(de)(de)(de)提(ti)高(gao)EPS解(jie)析(xi)出(chu)(chu)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang),從而(er)使(shi)多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)含量(liang)迅速提(ti)升(sheng)(sheng)。因(yin)此造成了酸(suan)堿性(xing)條(tiao)件(jian)(jian)(jian)下多(duo)(duo)(duo)(duo)糖(tang)(tang)(tang)濃(nong)度(du)差(cha)值(zhi)減(jian)小的(de)(de)(de)(de)情(qing)況。
由以上結(jie)果(guo)可知(zhi),堿(jian)性條件對烷基多(duo)(duo)糖(tang)苷聯合(he)(he)溶(rong)菌酶催化(hua)污泥(ni)水解有促進作用,并且(qie)隨著pH的增大,聯合(he)(he)作用系(xi)(xi)統對污泥(ni)的水解作用增強,剩余污泥(ni)系(xi)(xi)統中的SCOD、多(duo)(duo)糖(tang)和蛋白(bai)(bai)都隨之增加。當pH>11時(shi),多(duo)(duo)糖(tang),蛋白(bai)(bai),SCOD的增長(chang)幅(fu)度減緩。且(qie)當pH=11時(shi),SCOD,多(duo)(duo)糖(tang)和蛋白(bai)(bai)的濃度差(cha)值達到(dao)大。綜(zong)合(he)(he)各(ge)項指(zhi)標確定優(you)反(fan)應pH為(wei)11。