Manoj Kumar, Sushil kumar Tiwari, Priyanka Patel, and SnehdeepSinh Borasiya. “A Review on DESIGN OF SEQUENTIAL BATCH BIO-FILM GRANULAR REACTOR (SBBGR) FOR REDUCTION OF THE SLUDGE”. International Journal of Advance Research in Engineering, Science & Technology, vol. 4, no. 2, Feb. 2017, pp. 144-7, https://ijarest.org/index.php/ijarest/article/view/781.