化工学报
化工學報
화공학보
JOURNAL OF CHEMICAL INDUSY AND ENGINEERING (CHINA)
2015年
5期
1925-1930
,共6页
张为堂%薛晓飞%庞洪涛%张杰%李冬%彭永臻
張為堂%薛曉飛%龐洪濤%張傑%李鼕%彭永臻
장위당%설효비%방홍도%장걸%리동%팽영진
AAO%外硝化%反硝化除磷%生活污水%C/N
AAO%外硝化%反硝化除燐%生活汙水%C/N
AAO%외초화%반초화제린%생활오수%C/N
AAO%external nitrification%denitrifying phosphorus removal%domestic wastewater%C/N
AAO-BAF工艺由厌氧-缺氧-好氧反应器和曝气生物滤池组成,属于外硝化反硝化除磷工艺。以实际生活污水为处理对象,通过调节进水COD浓度(从211 mg·L?1增加到675 mg·L?1),研究了进水COD和TN的比(C/N)对 AAO-BAF 工艺运行性能的影响。结果表明,进水有机物浓度低或高,可以通过限制厌氧释磷量或竞争 AAO反应器缺氧区的NO?3,从而影响工艺的反硝化除磷效果。当进水C/N大于4,小于7时,AAO- BAF工艺对COD、TN和PO43?的去除率分别可达86%、78%和90%以上。很高的C/N(如9.5)会使缺氧区内存在大量挥发性脂肪酸(VFA),导致普通反硝化菌迅速消耗反硝化聚磷菌(DPAOs)的电子受体NO?3。
AAO-BAF工藝由厭氧-缺氧-好氧反應器和曝氣生物濾池組成,屬于外硝化反硝化除燐工藝。以實際生活汙水為處理對象,通過調節進水COD濃度(從211 mg·L?1增加到675 mg·L?1),研究瞭進水COD和TN的比(C/N)對 AAO-BAF 工藝運行性能的影響。結果錶明,進水有機物濃度低或高,可以通過限製厭氧釋燐量或競爭 AAO反應器缺氧區的NO?3,從而影響工藝的反硝化除燐效果。噹進水C/N大于4,小于7時,AAO- BAF工藝對COD、TN和PO43?的去除率分彆可達86%、78%和90%以上。很高的C/N(如9.5)會使缺氧區內存在大量揮髮性脂肪痠(VFA),導緻普通反硝化菌迅速消耗反硝化聚燐菌(DPAOs)的電子受體NO?3。
AAO-BAF공예유염양-결양-호양반응기화폭기생물려지조성,속우외초화반초화제린공예。이실제생활오수위처리대상,통과조절진수COD농도(종211 mg·L?1증가도675 mg·L?1),연구료진수COD화TN적비(C/N)대 AAO-BAF 공예운행성능적영향。결과표명,진수유궤물농도저혹고,가이통과한제염양석린량혹경쟁 AAO반응기결양구적NO?3,종이영향공예적반초화제린효과。당진수C/N대우4,소우7시,AAO- BAF공예대COD、TN화PO43?적거제솔분별가체86%、78%화90%이상。흔고적C/N(여9.5)회사결양구내존재대량휘발성지방산(VFA),도치보통반초화균신속소모반초화취린균(DPAOs)적전자수체NO?3。
Combining anaerobic-anoxic-oxic reactor with an external nitrification biological aerated filter, the AAO-BAF process was used to treat domestic wastewater. Adjusting the influent COD concentration from 211 to 675 mg·L?1, the effect of carbon-nitrogen ratio (C/N) on the performance of the AAO-BAF process was investigated. A low or high influent organic concentration had significant effect on the nutrients removal efficiency due to the deficient phosphorus release or nitrate competition in the anoxic zones of the AAO reactor between DPAOs and ordinary heterotrophic organisms. When C/N was between 4 and 7,the average removal efficiencies of COD, TN and PO43? could reach more than 86%, 78% and 90% respectively. Large quantity of residual volatile fatty acid (VFA)would be transferred into the anoxic zones when C/N was very high (such as 9.5), which would cause rapid consumption of NO?3 by ordinary heterotrophic organisms rather than denitrifying phosphorus accumulating organisms (DPAOs).