This appears to be more of statement to prompt research, that needs a data resource that could be studied more extensively. Does anyone know if such a data repository exists?

Dear Cory

Yes I agree with you, we need database on substrat characterization. But my question asked about an approach for pre-treatment choose to save time dan money.

Regards

Hassan

Even if you are concerned in pretreatment, there is not enough informationm to perform serious discussion.

The most appropriate pretreatment method depends upon substrate characteristics. Best pretreatment method for sewage sludge is not the best one for lignocellulosic substrate!!!!

Regards

Vit

It mainly depends on the type of substrate and the scope for which AD is performed. If the substrate is predominantly lignocellulosic, then AD is not the best choice for energy recovery; In this case, thermal methods for residuals recovery are more cost-effective than AD. If the substrate contains wet lignocellulosic material (e.g. green biomass) or is in co-digestion with sewage sludge, industrial organic waters, etc., AD is the most appropriate option, with the preliminary pretreatment of the lignocellulosic component. The optimal method of pretreatment depends on the purpose for which the pretreatment is performed, because it must be taken into account that mechanical, thermal, irradiation methods are faster but much more energy consuming than the biological /enzymatic ones which are very efficient for lignin and cellulose disruption but are much slower. Chemical methods are also fast and efficient but they require chemicals consumption and generate other waste to be disposed. If one considers the obtaining of energy and fertiliser exclusively for business or commercialization scope, the thermal and mechanical methods can be more profitable since in spite of the higher costs they may ensure high production in short time. If the purpose of AD is mainly waste disposal but energy recovery and fertiliser production are secondary objectives, then the enzymatic processes may be cheaper and more cost-effective for the waste generator. Indeed, in deciding on the optimal method, at least the three aspects must be taken into account: substrate type, the scope of the treatment and the costs involved.

As aforementioned, it mainly depends on substrate characterization. You may check a comparison of costs (capital and, operation and maintenance) and energy requirement (electricity and heat) between the different pretreatment methods in the following work https://authors.elsevier.com/c/1cFPB7taLYJIMC

Best regards,

RdA

There are many pre treatments available and particularly it depends on the feedstock/ rawmaterial and local conditions too. There are many factors depends on selection criterion and one has to do some feasibility study before getting or selecting the best that suits a particular feed stock.

There are different factors affecting it such as biodegradability, OLR, or initial VS, and pathogens. Therefore, It is best to conduct a BMP test to determine the best method for your material.

If the biodegradability of the material is higher, it is better to go for a simple mechanical pretreatment rather than go for more complex and expensive methods. As some pretreatments cause a reduction of biogas due to higher solubilization.

Article Thermal, ultrasonic and electrochemical pretreatment methods...