求翻译：当废水浓度增加到最大时，有磁粉反应器的污泥仍然具有较良好的沉降性能，SVI值最大值为93.21mL/g；而无磁粉反应器出现明显污泥膨胀现象，最终SVI值达267.12mL/g，并且不断升高。是什么意思？

When effluent concentrations up to the maximum,, magnetic particle reactor still has a relatively good settling properties of activated sludge, SVI value maximum value is 93.21mL/g while no noticeable phenomena of sludge bulking in magnetic particle reactor, SVI value eventually reached 267.12mL/g and rising.