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SAI INTERNATIONAL SCHOOL
                                                      CLASS-VII

                                            SUBJECT - CHEMISTRY
                                TOPIC- MANAGEMENT OF WASTE WATER
                                        SUB TOPIC- SEWAGE SYSTEM




                                                     MIND MAP




                                                       Sewage System





                                                           Water
                                                         Treatment




                                                          Primary
                                                         Treatment
                                                           Plant





                                        Screening       Grit Removal     Sedimentation







































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