Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center

Nanjing, China

Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center

Nanjing, China

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Xiaohua W.,Nanjing Agricultural University | Liyun Z.,Jiangsu Polytechnic of Finance and Economics | Yuting Q.,Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center | Libin T.,Station Energy
Energy and Environment | Year: 2015

Rural household energy consumption is an important component of the national total energy consumption. This has major implications for rural society, economy, and the environment. Jiangsu province is located in the economically developed coastal area, and assuming further social and economic development in its rural regions, commercial energy will become increasingly essential for rural households. By studying and analyzing change across time and region in southern, central and northern Jiangsu, we hope to contribute to the understanding of the change in rural household energy consumption in both China and the developing countries in general. Using questionnaires, household energy consumption and related problems were investigated in nine typical counties in Jiangsu province to show the large differences in the level of per capita rural household consumption and the structure of useful energy consumption in the typical areas. The current household consumption per capita is 396.93 kgce in a typical rural areas, with straw consumption contributing 38.73%, and electricity 32.96%. The structural differences of energy consumption and the percentage of commercial energy of useful heat in southern, central and northern Jiangsu were also investigated, as was the relationship between energy consumption and household net income. The study should help in building a balanced system of energy demand and supply and utilizeing biomass resources on a large scale.


Jin H.,Jiangsu Academy of Agricultural Sciences | Jin H.,Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center | Jin H.,Station Energy | Jin H.,Key Laboratory of Agro Environment in Downstream of Yangtze Plain | And 24 more authors.
Bioprocess and Biosystems Engineering | Year: 2016

The effects of hydraulic retention time (20 and 15 days) and swine manure to rice straw ratios on distribution of sulfonamides (SAs) in liquid and solid anaerobic digestates were studied using bench-scale completely stirred tank reactors at (37 ± 1) °C. Results showed that anaerobic digestion (AD) treatment exhibited a good removal effect on sulfadiazine (SDZ), sulfadimidine (SM2) and sulfachloropyridazine (SCP), especially at HRT = 20 days and co-digestion with swine manure and rice straw. The removal rates of SDZ and SM2 were more than 90%, but only 72.8% for SCP. The residual SAs were mainly remained in solid digestates, with residual rates ranging from 28.8% to 71.3%, 40.6% to 88.0, and 82.7% to 97.0% for SDZ, SM2 and SCP, respectively. Due to lower pKa and higher log Kow of SCP, its residue in solid digestates was far more than SDZ and SM2. Higher HRT and co-digestion could improve the degradation of SAs, which can also be put down to the occurrence of cometabolism of SAs and COD. © 2016 Springer-Verlag Berlin Heidelberg


Lu J.,Nanjing Agricultural University | Lu J.,Jiangsu Academy of Agricultural Sciences | Lu J.,Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center | Chang Z.-Z.,Jiangsu Academy of Agricultural Sciences | And 3 more authors.
Journal of Ecology and Rural Environment | Year: 2014

Through monitoring of ingestion and excretion of nitrogen and phosphorus by dairy cows of an on-scale dairy farm in summer and winter, analysis was done of relationship between the ingestion and excretion and a model was established for estimation of discharge of N and P from the farm in summer and winter. Results show that in water and summer, averagely, an adult dairy cow excretes 31.14 and 13.90 kg • d-1 of feces per day, respectively, and a lactating cow excretes 270.71 g • d-1 N and 66.67 g • d-1 P with feces and urine, 16.4% and 19.2% more than a dry cow does, and 150.7% and 174.0% more than a heifer does, respectively. Daily ingestion of nitrogen and phosphorus with fodder of a dairy cow varies sharply from cow to cow different in physiological stage (P<0.05), displaying an order of lactating cow > drying cow > heifer. Daily excretion of nitrogen and phosphorus with feces and urine from a cow also varies sharply from cow to cow different in physiological stage (P<0.05). The cows excrete with feces and urine more than 50% of the nitrogen and phosphorus ingested. Positive relationship was found of N and P ingestions with fodder and N and P excretions with feces, urine and milk in summer and winter. A model can hence be built up by fitting with a regression equation for estimation of N and P excretions with feces and urine based on N and P ingestions with fodder. The model may provide references for feces management and pollution prevention in dairy farms.


Jin H.,Jiangsu Academy of Agricultural Sciences | Jin H.,Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center | Jin H.,Key Laboratory of Food Quality and Safety of Jiangsu Province | Fu G.,Jiangsu Academy of Agricultural Sciences | And 3 more authors.
Research of Environmental Sciences | Year: 2015

Identification of the variations of Cu and Zn during the anaerobic digestion of manures is important to evaluate their input and environmental safety after application of digested residues. In order to study the concentration variations and chemical form changes of Cu and Zn during the anaerobic digestion of pig and dairy manures, two bench-scale complete stirred tank reactors were carried out under mesophilic ((37±2)℃) condition. The results showed that: 1) Cu and Zn concentrations in the digested pig slurry (DPS) distinctly increased with the anaerobic reaction time, whereas the variation trends in digested dairy slurry (DDS) were not obvious. 2) During a 158 d period of anaerobic digestion, the concentrations of Cu and Zn in DPS were significantly (P<0.001) lower than those in the raw pig slurry (RPS), with decrease rates of 80% and 43%, while those in DDS were slightly lower than those in raw dairy slurry (RDS), with decrease rates of 11% and 13%, respectively. 3) The percentages of dissolved Cu (filtered through 0.45 μm membrane) in DPS and DDS were 53% and 43% of the total Cu, respectively, while those of dissolved Zn were 35% and 19% respectively in DPS and DDS, with increase rates of 109% (P≤0.01) and 37%. 4) Cu and Zn in digested residues of pig manure and dairy manure were mainly oxidizable forms and residual and extractable/exchangeable forms, respectively. Mesophilic anaerobic digestion did not affect the removal of dissolved Cu and Zn in pig and dairy manures. In addition, the bioavailability of Cu and Zn would be enhanced due to the transformation of residual fractions of Cu and Zn in pig and dairy manures during the anaerobic digestion. This is not favorable for land application. ©, 2015, Editorial department of Molecular Catalysis. All right reserved.


Du J.,Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center | Zhu D.,Nanjing Research Institute of Agricultural Mechanization | Qian Y.,Jiangsu Agricultural Waste Treatment and Recycle Engineering Research Center | Chen Y.,Nanjing Research Institute of Agricultural Mechanization | And 2 more authors.
Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery | Year: 2013

In order to obtain the engineering control measures helpful to improve the dry fermentation efficiency, taking fresh cow dung and rice straws as raw materials, the effect of gas guide measurement and leachate-recirculation on gas production from dry fermentation was analyzed under the conditions of room temperature (ambient temperature of 22-36°C) and the total solid concentration of 16%. The results indicated that biogas efficiency was improved through regulation measures including laying vertical and horizontal vent-tubes. The average volume of biogas yield was up to 0.36 m3/(m3·d) (the gas yield with raw materials was 155 m3/t of total solid), higher than the comparison garage (0.28 m3/(m3·d), the gas yield with raw materials was 120 m3/t of TS) in the whole fermentation cycle (86 d). From the effect of leached with fermentation materials, it was concluded that the garage by returning spray digestive liquid every day was more effective. Furthermore, the equal flow distribution with spray device, matching of the pump selection and layout of return pipe should be in-depth researched.

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