With a view to producing biogas, an anaerobic biological reactor with wet technology and suspended

bed is to be fed with a biowaste that initially has $10\%$ moisture $($wet basis$)$ with the following elemental

weight composition CHO$\frac{0\mathrm{.}420}{0\mathrm{.}065}\frac{?}{0\mathrm{.}515}($dry basis$).$

a$)$ To prepare a reactor feed mixture containing $15\%$ solids $($wet basis$),$ determine the amount of water

you need to add to $1kg$ of this biowaste to reach this moisture content.

b$)$ Neglecting the formation of digestate, determine the mass balance of the process.

c$)$ Determine the composition of the $($dry$)$ biogas.

d$)$ Under the above conditions and assuming that the process takes place at $20C,$ determine the

expected volume of biogas.

e$)$ Under the above conditions, determine the amount of water that results from the process and

remains with the digestate$/$condensate$/$liquid phase.