Fenton、Fenton-Microwave和臭氧高级氧化法处理生活垃圾渗滤液的研究

目前70%以上的城市生活垃圾被直接填埋,如果不能及时有效无害化处理垃圾渗滤液,将导致污染环境。采用Fenton,Fenton-Microwave和臭氧的高级氧化法处理生活垃圾渗滤液,研究了不同微波功率、pH值、H_2O_2和Fe^(2+)物质的量比、臭氧浓度等条件对垃圾渗滤液化学需氧量(COD_(cr))降解率的影响。结果表明Fenton法在pH值为3,H_2O_2和Fe^(2+)物质的量比为3,反应时间90 min条件下垃圾渗滤液(COD_(cr))降解率为52.32%,Fenton-Microwave法在pH值为5,H_2O_2和Fe^(2+)物质的量比3,微波功率为420W,微波辐射下反应时间6min条件下垃圾渗滤液COD_(cr)降解率为61.74%,臭氧氧化法在pH值为8,臭氧速度为30mg/min,催化剂Fe^(2+)和COD_(cr)质量比为3最佳条件下垃圾渗滤液COD_(cr)降解率为48.30%。

Degradation of polyvinyl-alcohol wastewater by Fenton’s reagent: Condition optimization and enhanced biodegradability

The pretreatment of refractory polyvinyl-alcohol （PVA） wastewater with low value of CODcr by Fenton＇s reagent was investigated to enhance the biodegradabilily. The effects of operating conditions such as pH of the solution, Fe2＋ dosage, H2O2 dosage, reaction time and initial PVA concentration on the removal efficiency of CODCr were discussed. It is demonstrated that the optimum value of pH for removal of CODcr is 5 and the most suitable dosages of H2O2 （2%） and FeSO4 （10 mg/L） are 5% and 8.0%, respectively. When the initial CODcr value of the PVA water is 760 mg/L, the favorable reaction time is 110 min. Under these optimum conditions, the removal ratio of CODcr is 58.6% 61.4%, and the value of biodegradability （CODB/CODcr） increases markedly from 8.9% 9.7% to 62.6% 68.3%.