【摘要】 利用批式好氧呼吸计量法结合溶解性慢速水解COD(SH)水解动力学拟合提出了溶解性COD(SCOD)的组分划分方案.上海2个污水处理厂进水的SCOD组分划分结果表明,A厂沉砂池出水(典型生活污水)的SCOD中含有43.5%～58.6%SH、21.8%～35.2%易生物降解COD(SS)和15.4%～30.9%溶解性惰性COD(SI);B厂沉砂池出水(长距离输送的合流制污水)SCOD中含有34.5%～45.2%SH、29.3%～37.7%SS和25.6%～31.2%SI.9组不同水样的试验拟合结果表明,一级动力学能够很好地描述SH的水解过程,A厂和B厂进水SH的水解速率常数分别为28.00～39.77 d-1和26.48～29.52 d-1.该组分划分方案能够实现SS积分区域的理论划分,并消除溶解性微生物产物对SI测定的影响.更多还原

【Abstract】 A fractionation protocol of soluble COD（SCOD） was put forward by combining respirometric method with hydrolysis kinetics of soluble slowly biodegradable COD（S_H）.SCOD fractionation results of two wastewater treatment plants（WWTP） in Shanghai show that the SCOD in sand basin effluents（typical domestic wastewater） of WWTP A is composed of 43.5%-58.6% S_H,21.8%-35.2% readily biodegradable COD（S_S） and 15.4%-30.9% soluble inert COD（S_I）,and those SCOD fractions in sand basin effluents（combined sewers after long pipeline transportation） of WWTP B are 34.5%-45.2%,29.3%-37.7% and 25.6%-31.2%,respectively.The linear regression results of respirometric tests data from nine samples demonstrate that the first-order kinetics can reliably describe hydrolysis process of S_H,and the kinetic constants of S_H from WWTP A and B are respectively 28.00-39.77 d^-1 and 26.48-29.52 d^-1.Experimental results demonstrate that this protocol can achieve theoretical partition for the integration area of S_S,and also eliminate the effect of soluble microbial products on S_I determination.更多还原