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Complete sets of sewage treatment equipment
1, water quality analysis
The pig field discharge of urine excreta and wastewater containing large organic matter, nitrogen, phosphorus, suspended solids and pathogenic bacteria and odor, have great influence on the quality of the environment, it is urgent to governance.
Due to the pig, sewage treatment and industrial wastewater treatment, pig farm economic benefits does not limit the sewage treatment investment amount can not be too large, which requires less investment, good treatment effect, it is best to a part of resource recycling, there are certain economic benefits. And the pig farm sewage treatment usually is not only by a process, but the need according to the social conditions of the region, different natural conditions, and pig farms in the nature, size, production technology, wastewater quantity and quality, the degree of purification, and utilization direction, the use of several treatment method and apparatus are combined into a sewage treatment process.
To put forward the construction of wastewater quality index as the basis, combined with our company has accumulated a wastewater treatment engineering experience, learn from the successful experience of other regions with similar wastewater treatment, the company we develop the solid-liquid separation and pre processing UASB reactor + aeration stripping SBR treatment process.
2、Implementation standards
Raw water quality
CODcr≤14000mg/l BOD5≤8000mg/l
SS≤1000mg/l NH3－N≤950mg/l PH＝7—8
emission standard
After treatment to achieve local standards, that is:
CODcr≤150mg/l BOD5≤80mg/l
SS≤80mg/l PH＝6—9 ammonia nitrogen≤30mg/l
3, design principles
1, the sewage treatment technology and reliable, low operating costs, reasonable investment, advanced equipment and reliable equipment;
2, the process design has a good impact load and operational flexibility;
3, the overall layout is simple, reasonable, beautiful, in line with the relevant national greening and environmental protection, fire regulations;
4, power equipment with advanced equipment, to ensure long-term stable operation;
5, the synthesis of specific site conditions, design time to consider the equipment and the construction of the plane layout and reasonable elevation distribution, while considering the use of efficient equipment, to minimize the area;
4, processing process
5, process flow description
Wastewater from pig farm water first enters the storage volume, then separate pump to solid-liquid separator. Set the purpose of solid-liquid separator is the removal of wastewater in the fecal material and avoid entering the subsequent biogas pool, resulting in biogas pool of congestion, leading to difficult to clean up and can not be used as a consequence of. In the pig manure into the digester solid-liquid separation measures can solve pig manure in the problem of precipitation in biogas digesters, greatly enhanced the processing ability of the biogas pool, but also greatly decreases the biogas pool, biochemical pool construction area. Save the processing of environmental protection investment and construction land use area, isolated from pig manure can also directly as fruit tree and forest fertilization and as organic fertilizer raw materials.
Solid-liquid separator to be separated from the wastewater in the beginning of sedimentation tank, precipitation separation of waste water in small suspended particles, isolated from the sediment routinely discharged into the mud collecting sump, sewage into the acidification pool.
The purpose of the system is to adjust the acidification pool. One is to adjust the water quantity, the two is to pre acidification of wastewater, and to improve the efficiency of anaerobic unit. The waste water from the waste water of the acidification tank is raised regularly to the pulse water distributor of the UASB reactor, and the pulse water distributor is provided with an electric heater which is heated in winter to ensure the processing efficiency of the UASB reactor.
The wastewater is subjected to the anaerobic reaction of the UASB reactor through the pulse water supply, and a large amount of BOD and COD of the wastewater are removed, and the waste water is converted into methane gas. UASB reactor effluent into a flocculation reaction tank to produce biogas, after water sealed tank, after desulfurization tank and water seal tank into the gasholder storage. The biogas is used for generating electricity through the methane generator, and the power supply of the waste water treatment system is supplied with electricity.
Waste water in the PH regulator can add lime water, adjust the PH to regulate the flow of gravity into the two settling tank for precipitation separation. After the separation of the waste water is pumped into the blow off tank, sludge is discharged into the sump.
After anaerobic treatment, sewage generated a large amount of ammonia and other gases, in order to reduce the load of the follow-up treatment facilities, to ensure that the treatment system ammonia standard, set the blow off the pool using the air to blow off. The water flowing into the water distribution tank.
After the water storage of the water tank, with the pump to enhance the allocation to two SBR pool.
Wastewater in the SBR pool aerobic reaction, the use of aerobic microorganisms in the aerobic metabolism of the role of a large number of organic pollutants and ammonia removal, so that the waste water purification. SBR pool water through the water decanter discharged to aquatic plant pond, sludge is discharged into the mud pool.
Sludge treatment: solid-liquid separator dried mud storage of dried mud field; after the initial dehydration pump up to sludge concentration tank mud pond sludge sets, it is fed to the plate and frame filter press dewatering, isolated from the dried mud to dry mud.
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