| The object of this thesis is to look for a sludge disposal method fitting cleaner production and efficient energy-saving to quantitative reduction, innocuousness and resource. The object of study is the Jinyimeng company anaerobic-oxygen consumption sludge that is concentrated pool of sludge mixed. Key findings are as follows:(1)Inorganic coagulant role is to make organic colloid out of steady and flocculation precipitation through the role of absorption of organic polymer flocculants bridging. United disposal compared to separate vote organic polymer flocculants, it is no significant difference between the moisture content of filter cake after micro-vacuum filtered.(2)One of sludge dehydration difficulties is the tendency to some water attaching to the surface of the particles especially provisional interface water. Experiment of sludge dehydration showed that this kind of water maybe eliminate only by the interface change of attached water and common reagent useless. Polymer can only affect the pore water, and not affect the provisional interface water and hydration water. If sludge had a mechanical dehydration after modified treatment, it can only be separated free water and water space.(3)After the sludge mixed of concentrated pool were modified quality(flocculated) and mechanical pressure filter dehydration, the moisture content of filter cake was 70%~80%, rich in lignified fiber and cannot be used as raw material of organic-mixed fertilizer and must be disposed. Using solar energy, bio-energy and mechanical energy, the processing time reduced, energy consumption decreased,and the second dehydration of sludge filter cake high-temperature aerobic fermentation could be done. The moisture content of filter cake decreased by 30%~35%, less in lignified fiber and the powdery material generated as a vector was a more satisfactory slow-release material. Fermentation period was 8~12d, and maturity was 28%~32%(standard compost is about 30%, and groove type fermentation is 15%~20%).(4)The production test of organic-mixed slow-release fertilizer showed that the sludge mixed of concentrated pool were more satisfactory medium materials after modified quality, mechanical dehydration and the second dehydration of high-temperature aerobic fermentation. The addition of organic matrix is conducive to form granulation, and reduce the viscosity of the wall.(5)The performance test of organic-mixed slow-release fertilizer showed that Organic materials(matrix) may be extend the release time of fertilizer nitrogen as a vector (or matrix) with slow-release performance. Organic matrix compound with fertilizers had slow-release performance and increased nitrogen recovery. Through organic polymer materials modified, organic matrix could increase nitrogen recovery further, delay the release peak period of nutrient and control with different particle variable speed technology.(6)The field experiment of organic-mixed slow-release fertilizer showed that organic-mixed slow-release fertilizer could increase crop yield, nitrogen recovery, and reduce nitrate content in soil profile. Organic-mixed slow-release fertilizers are environment-friendly.(7)Evaluation in Eco-protection of organic-mixed slow-released fertilizer runs in two aspects. One aspect is Evaluation in Eco-protection of the. The other side is Evaluation in Eco-protection of the slow-release fertilizer made from the composite.The results of the studies on water-solubility composite were as follows: the degradation of CF2 began in the fourth week, and accomplished in the tenth week; the degradation of N-PS began in the eighth week, and accomplished in the twentieth week; the degradation of N-BX began in the seventh week, and accomplished in the sixteenth week; and the degradation of Sty-MM began in the ninth week, and basically accomplished in the twentieth week.The results of the studies at the effects of the water-solubility composite on soil organism showed that the amounts of the bacteria, actinomyces, ammoniate bacteria, nitrobacteria and cellulose decomposing bacteria all increased after the treatment by the slow-release materials, in which the biggest increment was come from the treatment by Sty-MM. But the influences of the amounts of epiphyte and azotobacter from the treatment were slight. And the amount of anti-nitrobacteria decreased after the treatment. The amounts of Nematoda phylum, Annelida, Soil mites, and Coleoptera all increased, in which the biggest increment was come from the treatment by Sty-MM and then the N-PS. Gastropod, Araneae, Isopoda, Diplopoda, Collembola and Hymenoptera was detected after the treatment by the polymer of Sty-MM, N-BX and N-PS, which was not happened in the treatment from CK1 or CF2. The biggest increment was likewise come from the treatment by Sty-MM.The results of the studies at the effects of the water-solubility composite on crop emergence and seedling growth showed that the four new composites would not inhibit the seed germination of wheat. In different concentrations, the seed germination rate was over 99 percents, which was similar with clean water. The results proved that CF2,N-PS,N-BX,Sty-MM was safe for seed germination of wheat.The results of the studies at the effects of organic mixture slow-released fertilizer on crop emergence and seedling growth showed that the seed germination rates of wheat which received different treatments were all over 95 percents, which was similar with wheat fertilized by fertilizer contain equitable NPK, and with wheat never fertilized. The investigation before the winter showed that the weight of the wheat fields top, the leaf area, and the chlorophyll content increased compared with wheat fertilized by fertilizer contain equitable NPK and with wheat never fertilized. There were no bad influences on crop emergence and seedling growth from the coated slow-released fertilizer made from the four new composites.The results of the studies at the effects of organic mixture slow-released fertilizer on the nitrate content in the soil profile showed that the coated slow-released fertilizer could decrease the risk of the nitrate loss to the groundwater. And the nitrate content accorded the groundwater nitrate content standard. When the nitrate cumulation in the soil by the coated slow-released fertilizer was between CK1 and CK2, the loss of the nitrate would be effectively reduced. The coated slow-released fertilizer could obviously reduce the loss of the nitrate compared with the NPK compound fertilizer.
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