[農(nóng)學(xué)]劉鴻亮院士：中國(guó)城市生活垃圾堆肥-wenkub
2023-01-31 12:39:56 本頁(yè)面
【正文】 was analyzed by O2H2S monitoring instrument (Model MD520E) in every four hours. For chemical and biological analysis: ? T N in the mixtures was measured by the kjeldahl method. ? TOC was measured by standard method. ? The number of microanisms was determined through plate counting method. ? Mesophilic and thermophilic microbial strains were obtained by plating samples taken from posting processes in cultivating plates at 30 and 60 degree Celsius. For chemical and biological calculation: ? The oxygen uptake rate was calculated by the following equation: where: R is Oxygen uptake rate (mol/hkg)； q is Airflow, m3/h； ze is O2 concentration of outlet gas。 t is Composting time (4) Where 2COris CO2 conversion rate (mol/h WSi is the sample weight of different time. RESULTS For the emission of outlet gas: ? When aeration flow was L/(min?kg), the moisture of posting matters was around 55%. Time (day) emission of oxygen (%O2) emission of carbon dioxide (% CO2) emission of H2S（ ppm） Control RunA RunB RunC Control RunA RunB RunC Control RunA RunB RunC 0 0 0 0 0 0 0 0 0 24 0 0 48 0 72 30 10 5 96 28 120 20 144 168 192 0 216 0 240 0 0 0 226 0 0 0 0 0 The following table shows the oxygen, carbon dioxide and H2S concentrations in the outlet gas The following figure shows oxygen accumulate profile during the posting processes 010020030040050060070080090010000 40 80 120 160 200 240C o m p o s t i n g t i m e /hAccumulate OxygenConsumption（g/hkg and g/hkg k g) in Run C. However, the peak rate of carbon dioxide only mol/(h ? additionally, inoculation plex microanisms which have high bioactivity for deposing anic matter could enhance maximum degradation rates ? Another function of inoculation was avoiding the lag periods of traditional posting processes. Analysis ?The degradation rate of inoculation posting will not be limited by substrates in the first stage of posting. ?However, with the posting processes undergoing, the solubilization of the solid waste will bee lower and lower, and may bee a significant factor that limits the reaction rate during the second posting stage ?seed inoculum which contain easily biodegradation anic substrates microanisms is necessary to avoid deposition limitation, emission odour gas and make the posting more stable.
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1