CN-121593533-B - Construction method of coastal cofferdam oyster fattening cultivation pollution discharge purification system

CN121593533BCN 121593533 BCN121593533 BCN 121593533BCN-121593533-B

Abstract

The invention provides a construction method of a coast cofferdam oyster fattening cultivation sewage purification system, and relates to the technical field of sewage purification systems. The method comprises the following steps of building a culture pond, primarily hardening the culture pond, paving a sewage pipeline, reinforcing the culture pond, and paving an impermeable film. The system built by the method comprises a culture pond, a sewage drain pipe and a sewage pump, wherein the structures of culture ridges and sewage drain ditches are built at the bottom of the culture pond, hardening and seepage prevention are carried out, the sewage drain pipe is paved at the bottom of the sewage drain ditch, and the sewage pump is installed, so that the fattening of the coastal cofferdam oysters is possible, the technical problems of sediment accumulation and water quality deterioration in the culture pond are effectively solved, and the unique floating ball type sewage drain valve design is adopted, so that the residual pollutants in the sewage drain pipe are thoroughly isolated from clean culture water bodies, secondary pollution is avoided, and the growth and cultivation environment of the oysters is ensured.

Inventors

YU CHI
LIU WEIGUO
SONG PENGYAN
LI QIANG
SHAN NA
ZHENG XUEQIN
ZHANG HONGKUN
YU PUZE
TAN LINTAO
YU CHENGSONG

Assignees

山东跃涛海洋科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260129

Claims (10)

1. The construction method of the coastal cofferdam oyster fattening culture sewage purification system is characterized by comprising the following steps of: S1, constructing a culture pond, namely constructing a cofferdam in a selected area of the coast to form the culture pond, constructing a plurality of culture ridges which are distributed in parallel at the bottom of the culture pond, and constructing a sewage drain between adjacent culture ridges; s2, primary hardening of the culture pond, namely mixing and stirring cement, quicklime and sludge into a hardening material, paving the hardening material on the bottom of the whole culture pond, compacting the hardening material to keep the shapes of the culture ridges and the sewage drain unchanged, standing and airing the hardening material to form a primary hardening layer; S3, paving a sewage pipeline, namely paving a sewage pipe with a plurality of sewage outlets at the bottom of the sewage ditch, wherein a sewage valve is arranged in each sewage outlet, one end of each sewage pipe is sealed, the other end of each sewage pipe is connected to a sewage collecting pipe, and a sewage pump is arranged at the tail end of each sewage collecting pipe; S4, reinforcing and hardening the culture pond, namely paving a cement blanket on the primary hardening layer, arranging cement blanket through holes at positions, corresponding to the drain outlet, on the cement blanket, and watering and curing the cement blanket to form a reinforcing hardening layer; s5, paving an impermeable film, namely paving the impermeable film on the reinforced hardened layer, and arranging an impermeable film through hole on the impermeable film at a position corresponding to the sewage outlet.
2. The method for constructing a coast cofferdam oyster fattening cultivation sewage purification system according to claim 1, wherein one end of each sewage pipe is sealed through a water inlet valve, the other end of each sewage pipe is connected to a sewage collecting pipe, and a water outlet valve is further arranged at the tail end of each sewage collecting pipe.
3. The method for constructing a drainage purification system for oyster fattening in a sea bank cofferdam according to claim 1, wherein the drainage valve comprises an upper cover provided with a valve hole, a bottom cover, a net barrel and a floating ball arranged in a cavity of the net barrel, and the floating ball can rise and fall along with the water level to open or close the valve hole.
4. A method for constructing a coastal cofferdam oyster fattening and cultivation sewage purification system according to claim 3, wherein the valve hole is a conical opening, and the floating ball is made of elastic materials.
5. The method for constructing a coast cofferdam oyster fattening, culturing and sewage purifying system according to claim 4, wherein a sealing cylinder is further arranged at the upper end of a net cylinder of the sewage valve, a sealing ring is arranged at the lower end of the sealing cylinder, and when the culturing pond is filled with water, the floating ball rises under the action of buoyancy force, seals the valve hole and is attached to the sealing ring, so that a double sealing structure is formed.
6. The method for constructing a coast cofferdam oyster fattening cultivation sewage purification system according to claim 1, wherein the number of cultivation ridges is 2, the sewage drain is positioned between two cultivation ridges, and the cultivation ridges are provided with an inclined angle which is beneficial to sewage drain towards the direction of the sewage drain.
7. The method for constructing a coastal cofferdam oyster fattening cultivation sewage purification system according to claim 1, wherein the width of the cultivation ridge is 2m-6m.
8. The method for constructing a sewage purification system for oyster fattening in a coastal cofferdam according to claim 1, wherein in the step S2, the mixing ratio of cement, quicklime and sludge is 40-60kg cement, 20-30kg quicklime and 0.5-1 cubic meter of sludge are used per 5-10 square meter of the bottom of the pond.
9. The method for constructing a sewage purification system for oyster fattening in a coastal cofferdam according to claim 8, wherein the mixing ratio of the hardening materials is 50kg cement, 25kg quicklime and 0.5 cubic meter of sludge for every 5 square meters of the bottom of the pool.
10. The method for constructing a coast cofferdam oyster fattening and cultivation sewage purification system according to claim 1, wherein in the step S2, the time for standing and airing a primary hardening layer is 3-7 days, and in the step S4, the time for watering and curing a cement blanket is 3-7 days.

Description

Construction method of coastal cofferdam oyster fattening cultivation pollution discharge purification system Technical Field The invention relates to the technical field of pollution discharge and purification systems, in particular to a construction method of a coast cofferdam oyster fattening cultivation pollution discharge and purification system. Background Oyster cultivation and fattening generally select sea areas or estuaries with proper salinity, rich baits (phytoplankton) and good water flow exchange, and do not adopt cofferdam cultivation ponds for cultivation. Because oyster growth is greatly affected by the environment, such as by the feed supply, water flow rate, deposit accumulation in its growing environment, these factors are critical to oyster growth rate, quality and survival rate. If a cofferdam culture pond is adopted for culture, oyster metabolites, false manure and organic particles which cannot be timely replaced can be deposited on the bottom of the pond, under the static or low-oxygen condition, sediment is easy to blacken, hydrogen sulfide and other toxic substances are produced, meanwhile, too much sediment is accumulated, bacteria are easy to breed, the health of the oyster is influenced, and even the death of the oyster is caused. Disclosure of Invention Aiming at the problem that oyster fattening can not adopt the technique of cofferdam culture, the invention provides a coast cofferdam oyster fattening culture sewage purification system and a construction method, the system constructed by the method comprises a culture pond, a sewage pipeline and a sewage pump, by constructing structures of the cultivation ridges and the sewage drain at the bottom of the cultivation pond, hardening and seepage-proofing treatment, laying a sewage drain pipe at the bottom of the sewage drain, and installing a sewage pump, the fattening of the coast cofferdam oyster becomes possible, and the technical problems of sediment accumulation and water quality deterioration in the cultivation pond are effectively solved. Therefore, the technical scheme of the invention is that the construction method of the coast cofferdam oyster fattening culture sewage purification system comprises the following steps: s1, constructing a culture pond, namely constructing a cofferdam in a selected area of the coast to form the culture pond, constructing a plurality of culture ridges which are distributed in parallel at the bottom of the culture pond, and constructing a sewage drain between adjacent culture ridges; S2, primary hardening of the culture pond, namely mixing and stirring cement, quicklime and sludge into a hardening material, paving the hardening material on the bottom of the whole culture pond, compacting the hardening material to keep the shapes of the culture ridges and the sewage drain unchanged, standing and airing the hardening material to form a primary hardening layer; s3, paving a sewage pipeline, namely paving sewage pipes with a plurality of sewage outlets at the bottom of the sewage ditch, arranging sewage valves in the sewage outlets, sealing one end of each sewage pipe, connecting the other end of each sewage pipe to a sewage collecting pipe, and arranging a sewage pump at the tail end of each sewage collecting pipe; s4, reinforcing and hardening the culture pond, namely paving a cement blanket on the primary hardening layer, arranging cement blanket through holes on the cement blanket at positions corresponding to the drain outlet, and watering and curing the cement blanket to form a reinforcing hardening layer; S5, paving an impermeable film, namely paving the impermeable film on the reinforced hardened layer, and arranging impermeable film through holes on the impermeable film at positions corresponding to the drain outlet. Further, one end of each sewage drain pipe is sealed through a water inlet valve, the other end of each sewage drain pipe is connected to a sewage collecting pipe, and a water outlet valve is further arranged at the tail end of the sewage collecting pipe. Further, the drain valve comprises an upper cover provided with a valve hole, a bottom cover, a net barrel and a floating ball arranged in a cavity of the net barrel, wherein the floating ball can rise and fall along with the water level to open or close the valve hole. Further, the valve hole is a conical opening, and the floating ball is made of elastic materials. When the culture pond is filled with water, the floating ball rises under the action of buoyancy, and simultaneously seals the valve hole and is attached to the sealing ring, so that a double sealing structure is formed. Further, the cross section of the sewage drain is V-shaped. Further, the width of the cultivation ridge is 2m-6m. Further, the number of the cultivation ridges is 2, the sewage disposal grooves are positioned between the two cultivation ridges, and the cultivation ridges are provided with inclined angles which are beneficial to sewage disposa