34results about How to "Prevent overbreeding" patented technology

The invention discloses a preparation method of a composite flocculation algae inhibitor, and belongs to the technical field of environmental protection. The preparation method is characterized by comprising the following steps: the preparation of chitosan-loaded algae inhibitor powder; the immobilization of alga inhibiting bacteria and the cationic modification of a flocculation agent; and compounding of the chitosan-loaded algae inhibitor and the biological composite modified flocculation agent. The invention also discloses the composite flocculation algae inhibitor. According to the composite flocculation algae inhibitor prepared by the preparation method disclosed by the invention, a good flocculation and algae removal effect can be achieved; a microbial agent with an alga inhibiting function is introduced while algae removal by flocculation is carried out, and a synergistic effect with the algae inhibitor is achieved, so that a long-acting algae inhibiting capability of water bodyis improved, and over-propagation of algae is prevented. According to the preparation process provided by the invention, the raw materials are low in price, the preparation cost is low, and the natural ecological system cannot be damaged by the materials, so that the composite flocculation algae inhibitor can be used as an emergency algae removal treatment agent for water body repair engineering,and can exert a long-acting algae inhibiting effect.

The invention discloses a method for treating black and odorous river water, which comprises the following steps: S1 divides the section of the river to be treated into multiple treatment units, extracts water samples from each treatment unit for COD testing, and divides them into multiple corresponding grades; S2 After the sewage pipe is closed, dredging is carried out in the treatment unit; after the desilting treatment in S2 is completed in S3, the water sample COD test is carried out for each treatment unit and reclassified into multiple corresponding levels; S4, according to the different levels of the treatment unit , carry out corresponding water quality treatment on the river water body; S5, follow-up treatment and operation and maintenance. Through the above settings, the river water body is divided into multiple levels and correspondingly treated separately. First, the water bodies in each part can obtain similar treatment effects, and at the same time can save a large cost. Secondly, the treatment requirements for different water bodies can be adjusted according to different levels. steps or reagents.

The invention discloses an improved pre-acidifying treatment process of citric acid wastewater. The process comprises the following step: precipitating overflow effluent of an anaerobic tank through a precipitating tank to obtain supernate which consists of supernate A, supernate B and supernate C, wherein the supernate A is returned and mixed with the citric acid wastewater, the supernate B is returned and mixed with acidified effluent, and the supernate C enters into subsequent steps for aerobic treatment to improve the pH value of effluent of a pre-acidifying pool and increase types and concentrations of microorganisms in the pre-acidifying pool so as to improve the pH of anaerobic inflow and reduce the impact to an anaerobic system, thereby improving the treatment efficiency of an anaerobic processor and the stability of the anaerobic treatment system, and meanwhile improving the removal rate of COD (Chemical Oxygen Demand) and the biogas production as well as lowering the operating cost of enterprises.

The invention discloses an aquatic product hoisting and raising device capable of resisting water body pollution, which comprises a floating ring. There are multiple hanging frames on the lower side. The hanging frame includes the main body of the screen frame. The upper and lower ends of the main body of the screen frame are fixedly connected with partitions. There are connecting pipes connected between the multiple hanging frames. The connecting pipe includes a pair of The conduit between the partitions, the bellows are connected between the two adjacent conveying pipes, and the outer wall of the hanging frame is fixedly connected with two pairs of extension belts, which can form a protective belt around the hanging and raising device to intercept the water in the water body. Pollutants, and the interception zone is composed of aquatic plants, and the aquatic plants carry oil-phagocytic microorganisms, and the oil-phagocytic microorganisms are used to treat the oil pollutants around the hanging device to prevent aquatic products from being polluted by oil pollution.

The invention discloses a return filling valve, which comprises a valve seat, a valve core and a sliding body. The valve seat is provided with a liquid inlet passage and a liquid outlet passage. The sliding body is slidably fixed on the valve seat. A filling channel is provided between the sliding body and the valve core, a valve seal is provided at the lower end of the valve core, and a return air return channel is provided on the valve core, and the liquid inlet channel is connected with the filling channel in turn. The loading channel, the return air return channel and the liquid outlet channel are connected to form a liquid return channel. At this time, the beverage can realize the reflux function along the liquid return channel, and the continuously flowing beverage can ensure that its temperature remains at 90±1°C, which meets the high-temperature filling requirements, and avoids excessive reproduction of microorganisms and bacteria in the beverage due to cooling, so that the beverage can reach It does not meet the hygienic requirements. When CIP cleaning is required, the CIP liquid can also achieve continuous flow. The flowing CIP liquid can flush the inside of the backflow filling valve, so that the difficult-to-remove dirt in the backflow filling valve can be removed.

The invention discloses a pond polyculture method for sea cucumbers and golden squid. The steps include pond selection, pond transformation, pond fertilizer and water, sea cucumber seedling insertion, bait feeding, growth management, golden squid fishing and harvesting, and sea cucumber subsequent cultivation and capture. The present invention utilizes the characteristic that golden squid can hunt and kill predators such as small crabs, small shrimps and gobies that are unfavorable to sea cucumbers, and can improve the utilization rate of water bodies when the two are mixed cultured, so that sea cucumbers and golden squids are mixed; adopting the present invention It can play the role of increasing the value of sea cucumber and golden squid production, improving the utilization rate of water body, achieving the effect of purifying water quality and improving the breeding environment.