The Inherent Biodegradability Characteritics of Light Greywater for the Different Bathe Products
To evaluate the inherent biodegradability of light greywater for the bathe products, 8 kinds of shampoos and 3 kinds of soaps were chosen. The Zehn-Wellens test was conducted to examine the biodegradability of the greywater for these bathe products, Results.sbowed that there was little biodegradable difference between the different bathe products we selected. Although the biochemical oxygen demand to chemical oxygen demand (BOD5/COD) of all of the greywater was less than O.Z, the biodegradation of these bathe products was rounded to the full percent after 28 days operation. Therefore, it was suggested that the method of using BOD5/COD to evaluate biodegradability might not be as accurate as we considered. Moreover, the molecular weight distributions of two typical kinds of greywater were analyzed by gel permeation chromatography (GPC). With the operation of the test from day I to day 28, the molecular weight distributions were getting narrower, and finally the fractions of the molecular weight below 105 Da accounted for 69.8％ and 77.8％ in Run 4 and Run 11, respectively. So, the greywater can be biodegraded to small molecules which were not harm to environment.
greywater Zehn-Wellens test bathe products inherent biodegradability greywater GPC
Weitao He Zhaoxiang Zhang Yayi Wang Xu zhao
College of Environmental Science and Engineering. Tongji University Shanghai, P R China College of Environmental Science and Engineering.Peking University Beijing, P R China
国际会议
昆明
英文
276-280
2010-10-17（万方平台首次上网日期，不代表论文的发表时间）