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“…<P><STRONG>Social Work & Geriatric Services</STRONG> examines many facets concerning the care of the elderly. …”

Tabla de Contenidos: “…Intro -- Cover -- Contents -- About the authors -- Preface -- Foreword -- Acknowledgements -- Chapter 1: Introduction -- Chapter 2: Theoretical background -- 2.1 COAGULATION-FLOCCULATION -- 2.2 PARAMETERS INFLUENCING COAGULATION-FLOCCULATION EFFICIENCY -- 2.2.1 Influence of coagulant type and dose -- 2.2.2 Influence of pH value -- 2.2.3 Influence of other parameters -- 2.3 PARAMETERS INFLUENCING FLOC PROPERTIES AND THEIR SEPARATION EFFICIENCY -- 2.3.1 Effect of coagulant type on floc properties -- 2.3.2 Effect of raw water composition on floc properties -- 2.3.3 Effect of mixing intensity on floc properties -- 2.3.4 Effect of mixing time on floc properties -- 2.3.5 Influence of floc properties on their separation -- Chapter 3: Jar tests -- 3.1 PRINCIPLE OF JAR TESTS -- 3.2 LABORATORY EQUIPMENT FOR JAR TESTS -- 3.3 STIRRERS FOR JAR TESTS AND INSTRUCTIONS FOR CALCULATING MIXING INTENSITY -- 3.4 WORKING PROCEDURE OF JAR TESTS -- 3.4.1 Optimisation of coagulant dose and coagulation pH value -- 3.4.2 Floc separation after jar tests -- 3.4.3 Sampling and data recording -- 3.4.4 Data processing and evaluation -- 3.5 TEST OF FLOCCULATION -- 3.5.1 Flocculation test working procedure -- 3.5.2 Data recording, processing and evaluation -- Conclusion -- References -- Symbols and Abbreviations -- Appendices -- APPENDIX 1: PHYSICAL PROPERTIES OF WATER -- APPENDIX 2: MOLECULAR (ATOMIC) MASSES -- APPENDIX 3: CONVERSION OF MASS CONCENTRATIONS TO MOLAR CONCENTRATIONS (AND VICE VERSA) OF SEVERAL COAGULANTS -- APPENDIX 4: PREPARATION OF 1% FE2(SO4)3 SOLUTION -- APPENDIX 5: PREPARATION OF 1% AL2(SO4)3 SOLUTION…”

“…Methodology: Take samples from the catchment point, pump deposit and reservoir according to standardized sampling standards, pH was determined using the electrometric method, hardness using the titrametric method, chlorides using the Mohr method, sulfates, nitrites and nitrates by absorption spectrophotometry, total dissolved solids by conductimetry, bacteria by the most probable number and heavy metals by atomic absorption spectrophotometry, all of them carried out in the DIRESA Laboratory - Puno (Peru), the parameters were contrasted with the established in the D.S. 004 – 2017 of the MINAM. …”

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