Mathematics for water and wastewater treatment plant operators Advanced mathematics for water and wastewater treatment plant operators. Fundamental mathematics for water and wastewater treatment plant operators. Design of municipal wastewater treatment plants Instrumentation handbook for water & wastewater treatment plants Instrumentation handbook for water wastewater treatment plants Mathematics for water and wastewater treatment plant operators: a complete training program in two volumes. Instrumentation handbook for water and wastewater treatment plants. Guidance manual of wastewater treatment engineering