32results about How to "Reduce COD index" patented technology

The invention discloses a device for rapidly treating kitchen waste wastewater. The device mainly comprises a cavitation air floatation device, a first-stage turbulent flow nano-aeration backwash filter, a bio-membrane reactor, a flocculation tank, a second-stage turbulent flow nano-aeration backwash filter and a girt chamber. The invention also discloses a method for treating kitchen waste wastewater by using the device. The problems of high kitchen waste wastewater output, high treatment difficulty and long reaction period are effectively solved by mainly using a mechanical method and accessorily using a biological method according to the concept that the kitchen waste wastewater is rapidly treated, the wastewater treatment time is shortened, the generated wastewater can be rapidly discharged up to the standard, and the aims of reduction, harmlessness and recycling of the kitchen waste wastewater are realized.

Provided in the present invention are a sludge activating ball and a preparation method therefor. The ball is prepared primarily from the following constituents: Sanguisorba officinalis, Patrinia scabiosaefolia, Pheretima aspergillum, Sargentodoxa cuneata, Cnidium monnieri, raw aged ginger, sea salt, a distilled wood vinegar solution, brown sugar, wheat bran, volcanic soil, and an environmentally friendly male agent. During preparation, aliquot parts of Sanguisorba officinalis, Patrinia scabiosaefolia, Pheretima aspergillum, Sargentodoxa cuneata, Cnidium monnieri, raw aged ginger, and sea salt are mixed and crushed and then mixed with volcanic soil at a ratio of 1:1, brown sugar and the mixture are mixed at a ratio of 1:1.5, a mixture prepared from the distilled wood vinegar solution and the environmentally friendly male agent at a ratio of 1:1 is poured in, wheat bran at a percentage by mass of 10% is sprinkled in and kneaded into a dough, which is placed in a moist, cool, and dark environment or placed onto a wooden rack at an ambient temperature of roughly 37 degrees, and, after 15 days of culturing, turns white on the surface, thus indicating the completion of fermentation and being ready for use. During use, the present invention dissolves slowly for sustained release, thus increasing the amount of beneficial microorganisms in the sludge, improving and activating the sludge, and removing foul odors of contaminated soil.

The invention relates to a nitrile butadiene rubber latex coagulation technology, and belongs to the treatment of a rubber latex characterized by a used coagulation agent. The technology is characterized in that polyepichlorohydrin dimethylamine is adopted as a coagulation agent, an aqueous solution of sodium chloride is adopted as a coagulation mother liquor, and sulfuric acid is adopted as a pH adjusting agent, and the technology comprises the following steps: 1, preparing the coagulation mother liquor, 2, preparing a solution of the coagulation agent, 3, preheating a nitrile butadiene rubber latex, 4, preparing a pH adjusting solution, and 5, coagulating the latex. The nitrile butadiene rubber latex coagulation technology has the advantages of coarse colloidal particles in the coagulation process, small crushed colloid loss, less consumption of the coagulation agent, small consumption of the pH adjusting agent, low COD index in discharged wastewater, simple use, short coagulation time and low production cost. The COD content in wastewater is 266.48mg / L, and accounts of 40% of the COD content in the prior art.

The invention discloses a large-scale chemical sewage treatment device, which includes a denitrification device, an aerobic tank, a sedimentation tank, a liquid treatment tank and a sludge treatment device connected in sequence; wherein, the sludge treatment device includes: a first-level sludge treatment unit , which includes: a first shell, the upper side wall of which is provided with a mud inlet, the top of the first shell is an arc-shaped structure, and a plurality of hard brush strips are arranged at intervals on the top of the first shell; the first filter plate, which is arranged in the middle of the first shell in the form of an arc-shaped belt, one end of the first filter plate is connected to the side wall of the first shell, the other end of the first filter plate is fixed to the vertical plate, and the first filter plate The two plates are vertically fixed in the first housing to separate the lower part of the first housing into a liquid storage space and a mud outlet space which are independent of each other, the mud outlet space communicates with the upper space of the first housing, and the storage The liquid space communicates with the upper space of the first housing through the filter holes of the first filter plate. The invention effectively dehydrates the sludge while treating the sewage.

The present invention discloses a method for preparing bleached chemical pulp by using cotton stalk. The described method is an alkaline process, and includes the following steps: preparing material, impregnating treatment, first cooking or secondary cooking to obtain crude pulp, then washing pulp, bleaching so as to obtain the finished paper.

The invention discloses a treatment method of landfill leachate and a device of the treatment method. The treatment method sequentially comprises the following steps: (1) carrying out first adsorption treatment on the landfill leachate by using active carbon powder to obtain a first post-adsorption liquid; (2) carrying out hydro-thermal treatment on the first post-adsorption liquid in a hydrothermal reaction kettle and cooling the liquid to obtain a hydrothermal post-treatment liquid; and (3) carrying out second adsorption treatment on the hydrothermal post-treatment liquid by using active carbon fibers to obtain a second post-adsorption liquid which can be directly discharged. The treatment device comprises a first adsorption filter tank, a hydrothermal treatment unit, a cooling pool and a second adsorption filter tank which are sequentially connected. The treatment method and device disclosed by the invention combine physical and chemical treatment methods and can economically and efficiently remove various toxic and harmful components in the landfill leachate, so that the landfill leachate is met.

The invention belongs to the technical field of de-inking and in particular discloses a preparation method of an efficient waste paper de-inking agent. The preparation method comprises the following steps: putting the beef tallow serving as a raw material into a reaction kettle; adding water and sodium hydroxide; performing steam heating until boiling; continuously stirring until saponification is finished to obtain transparent liquid soap; precipitating and cooling the liquid soap in the reaction kettle; after soap and water are separated, putting separated soap into an agitation tank; adding a surfactant and auxiliary materials into the agitation tank; and after evenly stirring, pelleting and drying to obtain the de-inking agent. The product disclosed by the invention has good compatibility with other chemical additives, is energy-efficient and environmentally-friendly and completely meets the waste paper de-inking requirements of Europe, America, Japan and the like; and the whiteness of the finished product paper can be improved by 2-5%, and the ink removal rate can be improved by 10-15%.

The invention provides a technique for treating and recycling lead-zinc ore dressing wastewater and aims to solve the problems of influence on the ore dressing index due to the recycling of the ore dressing wastewater for production and environmental pollution caused by drainage. The novel technique for treating and recycling the lead-zinc sulfide ore dressing wastewater comprises the steps of: adjusting the PH value of the total wastewater of an ore dressing plant; adding ferrous sulfate and flocculant into the wastewater to perform oxidation-coagulation treatment; and oxidizing the treated water by using chlorine dioxide, and performing catalytic oxidation and adsorption by using an active carbon bed, so that the treated water reaches the relevant discharge standard of China; and totally recycling the treated water by adopting the combined application of potential-controlled flotation and an environmental-protection collector. Compared with the field process technique, the method saves the cyanide flotation process and improves the recovery rates of lead, zinc and gold. The method provides whole technical integration of the combined application technique of the potential-controlled flotation and the environmental-protection collector and the wastewater treatment technique for the treatment and recycling of the lead-zinc ore dressing wastewater, and realizes recycling of the ore dressing wastewater.