Hi I dont have a publicized method per se so take my input with a pint of salt. form my experience of working with AD I think need to dilute with buffer, and reuse or cycle back the water into reactor. this may mean additional analysis (experiments) may need to use a stirrer to ensure uniform content at sampling or need stirrer (low speed) to ensure flow.. implementation of solustion may mean that  you have additional experiments to indicate that the parameters introduce have zero effect in help in treatment ?

 Salt is a potential inhibitor when circulating anaerobic effluents, but based on our experience, the salt might not cause the low circulation rate. We will coufirm the effect of salt by experiments. 

Hi, I think you have a low circulation rate because you don't use a suitable pomp. I think you should use a screw without end pomp.

 Dear Sami Ruz, the choice of pomp is am important factor on the industrial scale production, but in our case, the pomp type is not the reason for the low  circulation rate. Thank you for your advice.

Hi, what's the problem exactly? Pump capacity is not enough to ensure the recirculation of all effluent? Thanks to explain more your problem