GB/T 4750-2016Criteria for designing of household anaerobic digesters (English PDF)

3.1 pool type of various parts of the structure

3.1.1 Fermentation structure

Should use the same volume of timber less, both inside and outside the force is reasonable, favorable liquid flow, not easy to produce dead space, easy processing, transportation, construction

And the use of the structure of the management of the shape, examples, symbols see Appendix A, the structure of the shape see Appendix B.

3.1.2 inlet and outlet pipes

The diameter of the inlet and outlet pipes is in the range of.200mm ~ 300mm. When the concrete prefabricated pipe is used, the inner diameter should not be less than 250mm,

Tube, the diameter should not be less than.200mm. Into the flow of material in principle, the requirements of the outflow, special terrain, if the fermentation room is not effective

Diversion device, the inlet and outlet pipe (mouth) horizontal projection angle of not less than 120 °.

3.1.3 days window, activity cover

Household biogas digesters set up day window, activity cover. The shape can be selected according to the type of the tank and the construction process. round, oval, positive

Square, rectangular and other shapes; sealing can be bottle-type, flat-type positive cover (that is, from the top cover), anti-cover (that is, from the next cover). See attached

Record B, Figure B.9 Component diagram.

3.1.4 between the hydraulic pressure

The effective volume of the pressure between the biogas digesters is not less than 50% of the daily production. According to the plane shape can be divided into. round, oval, square

Shaped, rectangular, according to the pool type, built pool terrain according to local conditions should be designed. In the material can be discharged in the direction of the overflow should be provided.

3.1.5 gas storage

The effective volume of the gas storage cover of the separated biogas digesters is not less than 50% of the daily production capacity.