Abstract:

The IC reactor has been utilized for treating straw-washing wastewater in a pulping and paper mill. While the COD volume loading rate is 1.95-4.69 kg/(m³·d),the volatile fat acid(VFA) of the reactor effluent is 192.0-533.0 mg/L. Anaerobic process reflects the acidification trend. The influences of chloridion interference while VFA is detected on the detection results are studied. After adding different amount of chloride to wastewater samples containing acetic acid with different mass concentrations,the results show that chloridions have certain interference effect on VFA detection,and the VFA detected has all been increased. When the chloride whose concentration is less than 1 000 mg/L is added to the standard water sample whose acetic acid mass concentration is between 208.8- 1 044.0 mg/L,the VFA increase values detected are all less than 40.0 mg/L and the VFA increase rates are all between 0.07%-5.07%. When the concentration of the added chloride is 1 000-5 000 mg/L,the detected interference value of VFA is less than 80 mg/L, and the VFA increase rate is between 1.50%~32.87%.

Key words: anaerobic process, VFA, chloridion, IC reactor

摘要：

试验用IC反应器处理制浆洗草废水,负荷为1.95～4.69 kg/(m³·d)时,出水挥发性脂肪酸(VFA)为192.0～533.0 mg/L,厌氧过程体现酸化趋势,研究了VFA检测时氯离子的干扰对检则结果带来的影响。对含乙酸质量浓度不同的废水水样,投加不同量氯化物后检测VFA,结果表明氯离子对VFA检测有一定干扰,检测的VFA均有所增加。乙酸质量浓度为208.8～1 044.0 mg/L的标准水样,投加氯化物的质量浓度小于1 000 mg/L时,测定VFA的增加值均小于40.0 mg/L,VFA增加率在0.07%～5.07%;投加氯化物质量浓度在1 000~5 000 mg/L时,对VFA测定的干扰值未超过80.0 mg/L,VFA增加率在1.50%～32.87%。

关键词: 厌氧工艺, 挥发性脂肪酸, 氯离子, IC反应器

CLC Number: 

• X703.1