Mishra et al., have extensively studied the flocculation of different types of wastewater using plain [23–25] and grafted [26,27] P. psyl- lium mucilage. In the first of their studies [23] they investigated the flocculation of textile wastewater by P. psyllium mucilage. Their results showed that the natural anionic polysaccharide of the species was found to be a very effective flocculant, capable of removing more than 90 and 68% of suspended (SS) and total dissolved solids (TDS), respectively, from the textile effluent. The efficiency of the mucilage in flocculating textile wastewater is dependent on the pH of the medium under the test conditions. The most suitable pH values for SS and TDS removal were acidic and neutral, respectively. They determined that the optimal treatment time was 3–5 h at a flocculant concentration of 1.6 mg/L.