Study In Making-paper And Pulping Wastewater's Depth Anaerobic Degradability

The characteristicses of wastewater from making-paper and pulping industry are different,because of the produce technics,the raw maertrial etc. The wastewater has great quantity, the concentration of CODCr,chroma and fiber is high, the part of the wastewater has high temperature, and the low bio-chemical degradability. According to the characteristics of making-paper and pulping wastewater, the aerobic and physical chemistry technique are used in the waster treatment at home and abroad. Because of the high power and the high chemical used, more expense are used in the natural function, the fact make the industry in the very big environmental protection pressure. The characteristicses of the depth anaerobic degradability technique are with low function expense,little cover and have vice-materials, the technique is with more attention from the industry at home and abroad. The study in the depth anaerobic degradability in the wastewater from making-paper and pulping is limited, especially in the chemical pulping and biological pulipng. So the study in the different wastewater from different pulping methods has high used value.The article mostly study in the depth anaerobic degradability of the chemical pulping wastewater, biological pulping wastewater and wastepaper pulping wastewater on the laboratory. The chemical pulping wastewater contained the integrated water,the evaporation and condensation water,alkalescence water,the proportion of the evaporation and condensation water and alkalescence water is 1. The cubage of the UASB startuped with granular sludge. In the base of the study of the anaerobic degradability in the pulping wastewater, using the VABR reactor with 150L cubage to test the result, and provide the parameter used in design. The result of the study contains secearl aspects:1,The evaporation and condensation water can use depth anaerobic technique to treat. In the condition of HRT=1d,the VLR is 7kgCOD/(m3·d), the rate of the organic material removed is stably keeped more than 80%.2,The alkalescence water can't use the depth anaerobic technique to treat. In the condition of HRT=1d,the VLR is 2kgCOD/(m3·d), the rate of the organic material removed is stably keeped less than 20%.3,The mixed wastewater (the proportion of the evaporation and condensation water and alkalescence water is 1) can use depth anaerobic technique to treat. In the condition of HRT=10h,the VLR is 7kgCOD/(m3·d), the rate of the organic material removed is stably keeped more than 60%. 4,The integrated water tested in the laboratory and in the locale, it can use the depth anaerobic technique to treat. In the condition of HRT=4h,the VLR is 10kgCOD/(m3·d), the rate of the organic material removed is stably keeped more than 40%. The ceoncentation of the CODCr is more than 1500mg/L, the rate of the organic material removed is stably keeped more than 50%. The rate of marsh gas producing is 0.35m3(沼气)/kgCOD?d, the content of the methane is more than 75%.5,The biological puliping can use depth anaerobic technique to treat. In the condition of HRT=1d,the VLR is 8kgCOD/(m3·d), the rate of the organic material removed is stably keeped less than 75%.