Experimental Study Of Ecological Non-Water Toilet

Toilet plays a very important part in people's daily life. But the toilet once improved human habitation, has been considered a great root of water wasting and pollution. Nowdays, under the principle of continuable development, it is necessary to carry on the revolution of the toilet. Many environmental protection toilet emerged with the tide of the times.The toilet we studied is a kind of ecological non-water toilet using biodegradation. Its core is a bioreactor which is filled with sawdust as matrix. The principle of this toilet is using fermentation of demand oxygen microorganism to convert human excrements to water, carbon dioxide. Compared with traditional toilet, this toilet neither wastes water resources, nor needs the sewerage system. Moreover, it is also expected to achieve the target of non-water, "zero pollution, zero infection, zero emission" and "quantitative reduction, innocuity, resource utilization".The separation of human excrements degradation bacteria from the bacteria media in the ecological non-water toilet and the soil of the organic fertilizer farmland were done firstly. The bacteria screened under the condition of the experiment had good efficiency in degrading human excrements, without scentless, the degradation rate of COD reached 59%. The results indicated that the bacteria is efficient.the optimum design of ecological non-water toilet matching the complex biodegradation bacteria which has been isolated and screened was studied. The optimum temperature , and media quantity of 30 person - times ecological non-water toilet were determined by test. On the basis of experiment, the paper sets up a theoretical dynamic model of oxygen supply, and gains theoretical equation: C=299.9-159.9e^-3.07t. On the assumption that oxygen consumption is even at short interval, the paper sets up theoretical equation: C=299.9-19.9t. The result offers the theoretical basis of design, production and use about this kind of ecological non-water toilet.After the anterior experiment, the ecological non-water toilet of 30 person-times using self-execution bacteria was established for the change situation of TP, TN, ash contents, COD etc. The results show that the ecological non-water toilet has a good degradation efficiency for treating human excrements, and it could reach the target of non-water, "zero pollution, zero infection, zero emission" and "quantitative reduction, innocuity, resource utilization". The ecological non-water toilet which we empolder has been applied widely in many tour sights, sunch as Qian dao Lake, Zhou shan and so on, and it also has significant effect on protecting the local ecological environment.