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Effects of anaerobic digestion and aerobic treatment on the reduction of gaseous emissions from dairy manure storages

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International Journal of Agricultural and Biological Engineering 2008年第2期1卷 15-20页

作者： Ruihong Zhang Jeffery A.McGarvey Yanguo Ma Frank M.Mitloehner Biological and Agricultural Engineering Department University of CaliforniaDavisCAUSA US Department of Agriculture Agricultural Research ServiceFoodborne Contaminants Research UnitAlbanyCAUSA Animal Science Department University of CaliforniaDavisCAUSA

Effects of anaerobic digestion and aerobic treatment on the reduction of gaseous emissions from dairy manure storages were evaluated in this *** dairy manure containing 3.5%volatile solids(VS)was either anaerobically digested or aerobically treated prior to storage in air-tight *** digestion was carried out using a mesophilic anaerobic sequencing batch reactor operated at a hydraulic retention time of 20 days and an organic loading rate(OLR)of 1 gVS/L/*** treatment was achieved using an aerobic reactor operated at a hydraulic retention time(HRT)of 10 days and an OLR of 2 gVS/(L·d).The treated manure was put into the storage on a daily basis for a period of 180 *** the gases produced during this period were captured and analyzed for methane,carbon dioxide and volatile organic compounds(VOCs).Untreated manure was stored and analyzed in the same way as the treated manure and used as a control for *** results show that low amounts of gases were produced during the first 84 days of storage in both treated and untreated manure,but increased significantly after this time *** generally expected positive impacts of anaerobic and aerobic treatment on the reductions of methane and VOCs were confirmed in this ***,the effects of anaerobic and aerobic treatment varied over the time of storage,especially for *** results of this study indicate that to achieve significant reductions in VOC emission the storage time of anaerobic digester or aerobic reactor effluent should be limited to no more than 100 days.

关键词： anaerobic digestion aerobic treatment methane volatile organic compounds dairy manure

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A pilot scale trickling filter with pebble gravel as media and its performance to remove chemical oxygen demand from synthetic brewery wastewater

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第10期14卷 924-933页

作者： Haimanot HABTE LEMJI Hartmut ECKST DT Faculty of Agricultural and Environmental Sciences Institute of Hydromechanics and Water Management University of Rostock

Evaluating the performance of a biotrickling filter for the treatment of wastewaters produced by a company manufacturing beer was the aim of this study.A pilot scale trickling filter filled with gravel was used as the experimental *** scale plant experiments were made to evaluate the performance of the trickling filter aerobic and anaerobic biofilm systems for removal of chemical oxygen demand(COD) and nutrients from synthetic brewery *** evaluation data of the trickling filter were generated under different experimental *** trickling filter had an average efficiency of(86.81±6.95)% as the hydraulic loading rate increased from 4.0 to 6.4 m3/(m2·d).Various COD concentrations were used to adjust organic loading rates from 1.5 to 4.5 kg COD/(m3·d).An average COD removal efficiency of(85.10±6.40)% was achieved in all wastewater concentrations at a hydraulic loading of 6.4 m3/(m2·d).The results lead to a design organic load of 1.5 kg COD/(m3·d) to reach an effluent COD in the range of 50–120 mg/*** can be concluded from the results of this study,organic substances in brewery wastewater can be handled in a cost-effective and environmentally friendly manner using the gravel-filled trickling filter.

关键词： Biodegradation Pilot scale trickling filter aerobic treatment Brewery wastewater Chemical oxygen demand(COD) Trickling filter performance

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Pretreatment of hypersaline mustard wastewater with integrated bioreactor

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Journal of Central South University 2012年第6期19卷 1673-1678页

作者：何强张婷婷柴宏祥杨士伟周健杜国军 Key Laboratory of Three Gorges Reservoir Region's Eco-Environment(Chongqing University) Ministry of Education

A full-scale experimental study of treating mustard wastewater by the integrated bioreactor with designed scale of 1 000 m3/d is conducted combined with a demonstration project. The systematical researches on the efficiency of combined operation conditions of anaerobic-aerobic and anaerobic-aerobic-flocculation as well as chemical phosphorus removal of hypersaline mustard wastewater are conducted. The optimal operation condition and parameters in pretreatment of mustard wastewater in winter （the water temperature ranges 8-15 ~C） are determined： the anaerobic load is 3.0 kg （COD）/（m3.d）, the average COD and phosphate concentration of the inflow are respectively 3 883 mg/L and 35.53 mg/L and the dosage of flocculent （PAC） is 400 mg/L. The anaerobic-aerobic-flocculation combined operation condition and postpositive phosphorous removal with ferrous sulfate are employed. After treatment, the COD of the effluent is 470 mg/L and the average phosphate concentration is 5.09 mg/L. The effluent could achieve the third-level of Integrated Wastewater Discharge Standard （GB 8978--1996）.

关键词： mustard wastewater aerobic treatment anaerobic treatment integrated bioreactor chemical phosphorus removal

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