Due to the large amount of aquaculture sewage and a lot of suspended solids, the triangular water-cut wedge mesh used in the inclined screen solid-liquid separator can separate and squeeze most of the suspended solids, and the suspended solids in the separated sewage are reduced, which greatly reduces the investment and operating costs of the sewage follow-up treatment equipment.

Two, the working principle

The wastewater to be treated is evenly distributed to the inclined screen surface through the overflow weir, and is filtered through the inclined screen surface for primary filtration. The screen surface gap is small and smooth, and the back gap is large, so the drainage is smooth, and the solid is trapped, and the filtered water flows out from the gap of the screen plate. Under the hydraulic action, the solid is pushed to the lower end of the screen plate and enters the strainer screen for secondary filtration. Then the winch will push the solid into the screen round filter screen for three-stage filtration, and finally the winch will pressure the solid to open the blocking device, so as to achieve the purpose of solid-liquid separation.  

Three, equipment characteristics

1. The volume of the old biogas digester originally built by the farmers is too small, and the drainage time of the sewage into the pool is too short, resulting in the sewage concentration being discharged too high, if the sewage is first treated by the inclined screen solid liquid separator before it is submerged in the pool. It can effectively reduce the content of COD and BOD in sewage, reduce the operating load of biogas digester, and achieve the reduction and reduction of sewage discharge;

2. The sewage separated by the inclined sieve type solid-liquid separator enters the biogas digester intermittently, which can make the anaerobic pool have a full digestion time, so that the active bacteria in the pool can reproduce more vigorously and the gas production is higher;

3. The sewage separated by the inclined sieve type solid-liquid separator enters the biogas digester, which can effectively solve the crust phenomenon of the biogas digester and eliminate the work of cleaning the biogas residue;

4. The use of livestock and poultry manure solid-liquid separator can reduce the construction investment of biogas digester.  

Hydraulic screen model and parameter table:
 
Note: According to the user's water quality and site conditions, the operation, water direction, size, floor area and other flexible adjustment design.
Note: When the customer chooses the type, the treatment capacity of the hydraulic grille should consider the following aspects: sewage type; Temperature; Density; Oil content; Traffic, etc.

bgcolor="#ffffff" height="36" width="127" align="center"> Height (mm)

Model	SL300	SL500	SL800	SL1000	SL1500
Grid distance (mm)	Processing capacity (m³ /h)
0.5	6	10	16	20	30
1.0	13	22	35	45	65
1.5	16	35	55	70	100
Water inlet (DN)	100	100	150	200	200
Outlet (DN)	100	150	150	200	200
Width (mm)	380	580	880	1080	1580
Length (mm)	1150	1150	1150	1150	1150
1880	1880