Research On Organic Wastes Utilization And Models Of Ecological Industry And Ecological Agriculture

Environmental pollution and ecological destruction, we paid a huge resource and environmental costs, resource constraints and environmental problems become more and more prominent double the problems that seriously hampered the development of China’s future. Therefore, efficient, economic, multi-scale and recycling of resources become effective means to solve the bottlenecks of environment and development.Currently, the utilization of organic waste rather scattered, not enough in-depth and comprehensive, most of researches focus on primarily of policies and theories. In this paper, food processing and agricultural production were selected as samples of organic waste utilization, were analyzed from the characteristics of typical components of organic waste resources. According to the method of lines and a more detailed benefit analysis of use of organic waste utilization was practiced to explore the eco-industrial parks and eco-agriculture park mode.Three model cases of the the resource regeneration of organic wastes were proposed. The feasibility of whole process reclamation and utilization of dairy wastewater was analyzed. The reclamation and utilization of the scruff in the hydrolytic acidification tank were discussed especially. Based on the experiments, during the treatment of dairy wastewater, it was technologically feasible to realize zero secondary pollutants discharge and whole process reclamation and utilization. According to the utilization values of different components, three reclamation plans were established. Optimal plan for reclamation was determined as mixed fatty acid extraction. Combining the reclamation of scruff and the existing hydrolyzation-acidification-oxidation process for dairy wastewater treatment, the technical path for whole process reclamation and utilization of dairy wastewater was put forward. The whole process was constituted by wastewater, scruff and sludge reclamation systems. The wastewater, the byproduct scruff and the sludge were all reclaimed. The major products were standard effluent, fatty acid, flocculent and fertilizer.Rice straw pretreatment process was optimized by orthogonal experiment. The optimal condition of Na OH pretreated rice straw was temperature 80℃, concentration of Na OH solution 1.0%, reaction time 90 min, suitable smashed rice straw 40 mesh. Pretreated rice straws were degraded by cellulose degradation bacterium. The degradation rate and reduced sugar yield are 70.3% and 10.6%. Flocculation producing bacteria could utilize the saccharifyed liquid of rice straw and produce bioflocculant. A new way of utilization of agricultural waste straw was put forward:saccharification liquid got from straw degraded by cellulose degradation bacteria after pretreatment, flocculating bacteria was fermented for bio-flocculants production, Saccharification liquid supernatant produced by feeding feed for livestock farming, livestock manure produced by fermentation for biogas, biogas sludge fertilizer for farmland, to achieve the straw utilization. Hailin farm biogas as the core economic model of agricultural cycle was investigated, achieving the substances step-utilization of breeding, farming and human waste, reducing the material’s amount, waste output and improving resource use efficiency, while achieving the environmental benefits, ecological and economic benefits; too cold in winter for the northern digester, the temperature was low, and it provided valuable experience for the northern cold areas, the development of gas as the core foundation of circular economy. A set of Songhua River in Harbin section of agricultural non-point source pollution control program was proposed, to recycling economy concept, by construction of the Harbin section of Songhua River along the regional scientific and rational regional division, combined with enhancing water treatment infrastructure and supporting pipe network building, focus on resolving livestock, pesticide and fertilizer runoff, water and soil erosion in rural life to bring about four body of water pollution, by using a series of relevant engineers steps to achieve progressively the full realization of the Songhua River ecology of water quality improvement.Combining the material mater ecological chain and the long-range information ecological chain, the virtual and real high-tech eco-industrial parks was constructed with the integrated technology of matter, energy and information. From the practical conditions of Shandong province and Jiaonan area, four major projects were determined to be developed preferentially: ecological vintage, biological fermentation, logistics and environmental protection. Accessorial enterprises were constructed by making the full utilization of the byproducts and wastes generated by the core enterprises, which was a favorable reflection of the concepts of matter circulation of the industrial ecological system and the effective utilization of energy. The key enterprises and their accessorial enterprises formed the industrial ecological communities. Through the serial utilization of product, energy and water, the ecological communities were connected to the long-range enterprises. Through the common products and the relationships between water and energy, ecological industrial chains such as vintage ecological industry, ecological biological fermentation, and environmental protection were formulated. Finally, ecological industrial network were formed with the district concept of circular economy. The circular economy model of eco-agricultural parks, that taking resource regeneration of organic wastes as core was proposed. The reclamation and utilization of wastes were conducted from a macroscopical, ecological, circular, sustainable perspective. The reclamation of itaconic acid mother liquid was a node in the whole process reclamation and utilization of organic wastes.