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An ion generating element (10) has at least one first discharger (12) for generating positive ions and at least one second discharger (13) for generating negative ions, both fitted or printed on a single dielectric member (11). The first and second dischargers (12) and (13) are each composed of a pair of a first or second discharging electrode (12a) or (13a), respectively, formed on the surface of the dielectric member (11) and a first or second induction electrode (12b) or (13b), respectively, buried in the dielectric member (11), and are arranged both on the same flat surface of the dielectric member (11) but separately from and independently of each other. This construction helps to alleviate the neutralization among the generated ions themselves, thus to effectively release both positive and negative ions, and thereby to enhance the ion generation efficiency.

An ion generating element (10) has at least one first discharger (12) for generating positive ions and at least one second discharger (13) for generating negative ions, both fitted or printed on a single dielectric member (11). The first and second dischargers (12) and (13) are each composed of a pair of a first or second discharging electrode (12a) or (13a), respectively, formed on the surface of the dielectric member (11) and a first or second induction electrode (12b) or (13b), respectively, buried in the dielectric member (11), and are arranged both on the same flat surface of the dielectric member (11) but separately from and independently of each other. This construction helps to alleviate the neutralization among the generated ions themselves, thus to effectively release both positive and negative ions, and thereby to enhance the ion generation efficiency.

The invention relates to a production method of a composite bio-enzyme preparation for domestic sludge decrement treatment. The production method is characterized by comprising the following processes sequentially: strain collection and extraction, strain cultivation, fermentation, and bio-enzyme separation and extraction, wherein the strain collection and extraction comprises the following steps: collecting bacteria from the domestic sludge, then cultivating by adopting a corresponding culture medium and mixing the corresponding strain and corresponding fermentation backing material for fermentation; the bio-enzyme separation and extraction process is a physical separating and extracting process or a chemical separating and extracting process, wherein the physical separating and extracting process is to conduct centrifugal separation to leavening by adopting a centrifugal method and the chemical separating and extracting process comprises the steps of adding ammonium sulfate into the leavening for salting out and then filtering. Compared with the prior art, the produced composite bio-enzyme preparation for domestic sludge decrement treatment has the advantages of removing odor, eliminating the inhibitional effect of H2S to nitrifying process, effectively reducing organic matters, converting soluble organic matters into carbon dioxide, nitrogen, oxygen, water and sulfate, reducing TSS (Total Soluble Solid), COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand), greatly decreasing the yield of the sludge, and being non-toxic and corrosion-free and avoiding secondary pollution.

The invention provides a cerium-zirconium base nitric oxide common temperature catalyst preparation method, which is characterized by comprising: adopting active alumina powder as a carrier, carrying out cerium nitrate and zirconium nitrate impregnating loading, calcining, carrying out copper acetate and ammonia water mixed solution impregnating, and carrying out low temperature drying to obtain the catalyst so as to achieve common temperature catalysis oxidation on nitric oxide. Compared with the preparation method in the prior art, the preparation method of the present invention has characteristics of simple process, high catalysis efficiency and the like, wherein NO oxidation absorption efficiency is significantly increased.

The invention discloses a composite stabilizing agent for preserving a liquid cellulase, which can preserve the vitality of the cellulase for a long time under the liquid condition. The composite stabilizing agent is prepared from the raw materials including sucrose, sodium chloride, potassium sorbate and sodium hyposulfite by blending and stirring. The weight percentages of the raw materials in the liquid cellulase are as follows: 30 to 50 percent of the sucrose, 5 to15 percent of the sodium chloride, 0.01 to 0.03 percent of the potassium sorbate and 0.01 to 0.02 percent of the sodium hyposulfite. The composite stabilizing agent uses the sucrose and the sodium chloride so that cellulase protein molecules keep the stable structures easily in water molecules and are not easy to denaturalize and lose the activity, uses the potassium sorbate to control the colony count so as to meet the requirements on food conditions conveniently, and uses the sodium hyposulfite for preventing enzyme protein from being oxidized to lose the activity. The four raw materials of the composite stabilizing agent is easily available, the food grade is relatively high so that the cellulase activity cannot be reduced within two years at room temperature, the cost for building a refrigerated storage for keeping the cellulase activity is saved, and the preservation and transportation of the liquid cellulase are convenient.