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Water Science & Technology

Volume 26 Number 9-11

Contents

The Biosorption of Selected Pesticides from Water by Biologically Activated Carbon
B. Dalmacija, Z. Tamaš, D. Miškovic E. Karlovic and O. Petrovic ..........1991–1994
Kinetics of Biofilm Detachment
B. M. Peyton and W. G. Characklis ..........1995–1998
Treatment of a Landfill Leachate Containing Refractory Organics and Ammonium Nitrogen by the Microorganism-Attached Activated Carbon Fluidized Bed Process
N. Iwami, A. Imai, Y. Inamori and R.Sudo ..........1999–2002
Simultaneous Removal of BOD and Nitrogen with Anoxic/Oxic Porous Biomass Support Systems
M. Kondo, S. Hozo and Y. Inamori ..........2003–2006
Channel Experiments on Coastal Water Purification by Porous Bed Using Crushed Stones
Y. Hosokawa, T. Ootsuki and C. Niwa ..........2007–2010
Use of Biofiltration for Removal of Natural Organic Matter to Achieve Biologically Stable Drinking Water
R. M. Hozalski, S. Goel and E. J. Bouwer ..........2011–2014
Formation of Biofilms on Small Suspended Particles in Airlift Reactors
L. Tijhuis, L. P. M. van der Pluym, M. C. M. van Loosdrecht and J. J. Heijnen ..........2015–2019
Simultaneous Removal of Nitrogen and THM Precursor by Developed Submerged Biofilm Process for Drinking Water
M. Takasaki, R.Sudo, O. Nishimura and H. Y. Kim ..........2021–2024
Hydrodynamics of Cell Suspension Flow and Biofilm Formation in Porous Media: A Laboratory Study
S. Sanin and J. Bryers ..........2025
Continuous Biological Phosphorus Removal in a Biofilm Reactor
R. F. Gonçalves and F. Rogalla ..........2027–2030
Biodegradation of Organic Substances by Biological Activated Carbon — Simulation of Bacterial Activity on Granular Activated Carbon
W. Nishijima, M. Tojo, M. Okada and A. Murakami ..........2031–2034
Attached Growth Reactor for Bod Removal and Nitrification with Polyurethane Foam Medium
H. Tsuno, I. Somiya, N. Matsumoto and S. Sasai ..........2035–2038
Nitrogen Removal by a Submerged Biofilm Process with Fibrous Carriers
B. Wang, G. Li, Q. Yang and R. Liu ..........2039–2042
Biocarbone Aerated Filters - Ten Years After: Past, Present, and Plenty of Potential
F. Rogalla and J. Sibony ..........2043–2048
Microbial Activity Evolution during the Acclimation of a Mixed Culture to Phenol: Use of CO2 Evolution Rate as Indicator
G. Buitrón, A. Koefoed and B. Capdeville ..........2049–2052
Cavitation-Induced Degradation of Phenol by Ultrasound
S. Okouchi, O. Nojima and T. Arai ..........2053–2056
Removal of Phenols with Tyrosinase Immobilized on Magnetite
S. Wada, H. Ichikawa and K. Tatsumi ..........2057–2059
Degradation Rate of Aircraft Deicing Fluid in a Sequential Biological Reactor
Y. Sabeh and K. S. Narasiah ..........2061–2064
Anaerobic-Aerobic Wastewater Treatment Plant of a Potato Chips Factory
U. Austermann-Haun and C. F. Seyfried ..........2065–2068
Anaerobic Biological Removal of Dimethyldisulfide in a Chemical Process Wastewater
P. Le Cloirec, P. Horny and A. Ladousse ..........2069–2072
Two-Stage Coalescer for Oil/Water Separation
S. Sokolovic, R. Secerov-Sokolovic and S. Sevic ..........2073–2076
Ferrate vs Traditional Coagulants in the Treatment of Combined Industrial Wastes
S. J. de Luca, M. Cantelli and M. A. de Luca ..........2077–2080
Degradation of Carbaryl and 1-Naphthol by Spent Mushroom Compost Microorganisms
W. S. Kuo and R. W. Regan, Sr ..........2081–2084
Sequential Chemical/Biological Oxidation of 2-Chlorophenol
J. P. Stowell, J. N. Jensen and A. S. Weber ..........2085–2087
Evaluation of Biodegradability of Starch-Based Plastics
U. J. Ndon, A. D. Levine and B. S. Bradley ..........2089–2092
Anaerobic—Aerobic Treatment of a Dye Wastewater by Combination of RBC with Activated Sludge
Y. Zaoyan, S. Ke, S. Guangliang, Y. Fan, D. Jinshan and M. Huanian ..........2093–2096
Valorization of Solid Wastes from Biomethanisation of Pig Breeding Effluents
E. A. Duarte, B. Mendes and J. S. Oliveira ..........2097–2100
Biodegradation of Wool Scouring Effluent on a Laboratory Scale
R. A. Oellermann, T. Ronen and V. Meyer ..........2101–2104
Sludge Utilization and Reduction Experiences in the Pulp and Paper Industry
I. Öztürk, V. Eroglu and A. Bastürk ..........2105–2108
Biotower Pilot Study Results for a Photographic and Specialty Paper Manufacturer
J. G. Cleary, T. J. Boehm and R. J. Geary ..........2109–2112
The Effects of the Secondary Carbon Source on the Biodegradation of Chlorinated Phenols in Biofilm Reactors
C. J. Lu and S. J. Chen ..........2113–2116
Evaluation of South African Raw and Drinking Water Supplies for Volatile Organic Complexes Potentially Hazardous to Human Health
E. Meintjies and V. Maharaj ..........2117–2120
Competitive Adsorption of Phenoxy Herbicide Chemicals in Soil
S. Susarla, G. V. Bhaskar and S. M. Rao Bhamidimarri ..........2121–2124
Decrease in Toxicity of Pentachlorophenol and Toluene to Growth of Selected Microbial Consortia and Activated Sludge by Pretreatment with Phanerochaete chrysosporium
J. Bower Carberry and L. E. Kovach ..........2125–2128
Removal of Some Radionuclides from Water by Bioaccumulation
D. Mičkovic, Lj. Conkic, B. Dalmacija and M. Gantar ..........2129–2132
Accumulation of Zinc in Activated Sludge
K. Moriyama, Y. Kobayashi, T. Mori, H. Nakahara and M. Chino ..........2133–2136
The Removal of Selenium from Water by Slow Sand Filtration
P. L. Carlo, L. P. Owens, G. P. Hanna, Jr. and K. E. Longley ..........2137–2140
Effect of the Surface Characteristics of Seed on Copper Precipitation
Y. Wang and P. R. Anderson ..........2141–2143
Experimental Evaluation of Microbial Metal Uptake by Individual Components of a Microbial Biosorption System
A. A. Pradhan and A. D. Levine ..........2145–2148
Metals Removal and Recovery by Arthrobacter sp. Biomass
A. Grappelli, L. Campanella, E. Cardarelli, F. Mazzei, M. Cordatore and W. Pietrosanti ..........2149–2152
Role of Extracellular Components in Microbial Biosorption of Copper and Lead
A. A. Pradhan and A. D. Levine ..........2153–2156
Cross-Coupling of a Chloroaniline and Phenolic Acids Catalyzed by a Fungal Enzyme
K. Tatsumi, S. Wada, H. Ichikawa, S.Y. Liu and Jean-Marc Bollag ..........2157–2160
Environmental Assessment Method For Field Release of Genetically Engineered Microorganisms Using Microcosm Systems
Y. Inamori, K. Murakami, R. Sudo, Y. Kurihara and N. Tanaka ..........2161–2164
Effect of Temperature on Prosperity and Decay of Genetically Engineered Microorganisms in a Microcosm System
K. Murakami, Y. Inamori, R. Sudo and Y. Kurihara ..........2165–2168
Removal of Salmonella, Streptococci and Coliforms in Pig Breeding Effluent by Anaerobic Mesophilic Digestion
E. A. Duarte, B. Mendes and J. S. Oliveira ..........2169–2172
Degradation of Cyanobacteria, Microcystis by Microflagellate, Monas guttula
N. Sugiura, Y. Inamori, T. Ouchiyama and R. Sudo ..........2173–2176
Growth of Thiosphaera Pantotropha in a Continuous-Flow Stirred Tank Reactor
P. A. M. Arts, L. A. Robertson, P. Bos and J. G. Kuenen ..........2177–2180
Investigation of Bacterial Populations Producing Elevated MPN Values and False Positive Fecal Coliform Counts and Applicable Disinfectants in an Industrial Wastewater
E. M. Davis, D. L. Manville, J. J. Mathewson and G. W. Meriwether, III ..........2181–2182
Pathogen Reduction Capabilities of Freeze/Thaw Sludge Conditioning
D. F. Sanin, P. A. Vesilind and J. J. Martel ..........2183
Comparative Rates of Disinfection of Microbial Indicator Organisms in Chlorinated Sewage Effluents
S. R. Rippey and W. D. Watkins ..........2185–2189
Accelerated Phenol Removal by Amplifying the Metabolic Pathway with a Recombinant Plasmid Encoding Catechol 2, 3 Oxygenase
M. Fujita, M. Ike and T. Kamiya ..........2191–2194
Comparison of Yields and Decay Rates for a Biological Nutrient Removal Process and a Conventional Activated Sludge Process
S. A. McClintock, V. M. Pattarkine and C. W. Randall ..........2195–2198
Effects of an Activated Primary Settling Tank on Biological Phosphorus Removal
D. Wedi ..........2199–2202
Potassium and Magnesium Requirements for Enhanced Biological Phosphorus Removal from Wastewater
L. F. Rickard and S. A. McClintock ..........2203–2206
Nitrification with Biofilms on Small Suspended Particles in Airlift Reactors
L. Tijhuis, M. C. M. van Loosdrecht and J. J. Heijnen ..........2207–2211
Polyphosphate and Poly-ß-Hydroxybutyrate Production in Acinetobacter spp. Isolated from Activated Sludge
G. N. Rees, G. Vasiliadis, J. W. May and R. C. Bayly ..........2213–2215
Achievement of Biological Nutrient Removal in a Full-Scale Rotating Biological Contactor Wastewater Treatment Plant
K. E. Neu ..........2217–2220
Investigation of Reduction in Oxygen Requirements of Biological Phosphorus Removal Systems
M. W. Wable and C. W. Randall ..........2221–2223
Nitrification—Denitrification of High-Strength Nitrogen Wastes in Two Up-Flow Submerged Filters
F. Çeçen and I. E. Gönenç ..........2225–2228
Struvite (MgNH4PO4·6H2O) Solubility and its Application to a Piggery Effluent Problem
K. M. Webb and G. E. Ho ..........2229–2232
Biological Nutrient Removal at the Blue Plains Wastewater Treatment Plant in Washington, D.C.
S. J. Kang, W. F. Bailey and D. Jenkins ..........2233–2236
Critical Design and Process Control Features to Optimize Biological Nutrient Removal in Temperate Climates
D. Sen, C. W. Randall, R. R. Copithorn and T. J. Grizzard ..........2237–2240
The Combined Biological Nitrogen and Phosphorus Removal - Design and Large-Scale Experiences
P. Hartwig and C. F. Seyfried ..........2241–2244
Biochemical Models for Phosphate Accumulating Microorganisms
Ma. del Carmen Doria-Serrano, S. González-Martínez and M. Hernández-Esparza ..........2245–2248
Phosphate Precipitation with On-Site Alkali Generation
F. F. Kolbé and J. S. Terblanche ..........2249–2252
Full-Scale Cyclic Activated Sludge System Phosphorus Removal
M. C. Goronszy ..........2253–2256
Laboratory-Scale Ozonation of Water Contaminated with Trace Pesticides
M. Koga, K. Kadokami and R. Shinohara ..........2257–2260
Fate of Chlorinated Organic Compounds during Thermal Conversion of Sewage Sludge
M. Th. Steger ..........2261–2264
Anoxic, Zero-Headspace Titrations of Landfill Leachate
D. E. Sawyers and S. K. Dentel ..........2265–2268
ION Exchange Characterisation of Modified Zeolite
Š. Cerjan-Stefanovic, M. Kaštelan-Macan and T. Filipan ..........2269–2272
Dewatering of Sewage Sludge with Vacuum Assisted Sludge Dewatering Beds
R. Haberl and Ch. Salzer ..........2273–2276
Macrocolloidal Transport in Membrane Filters in Slow Laminar Flows: Polarization Chromatography
S. Chellam and M. R. Wiesner ..........2277–2280
Effect of Delaying the Addition of Polymeric Coagulant-Aid on Settled Water Turbidity
D. Brejchova and M. R. Wiesner ..........2281–2284
Pilot Evaluation of Ceramic Membranes in Surface Water Treatment with Coagulant Pretreatment
S. Veerapaneni, D. Brejchova, D. C. Schmelling, F. F. Nazzal and M. R. Wiesner ..........2285–2288
Chemical Solubilization of Particulate Organics as a Pretreatment Approach
S. R. Mukherjee and A. D. Levine ..........2289–2292
Bioregeneration of Granular-Activated Carbon
F. A. Craveiro de Sa and J. F. Malina Jr ..........2293–2295
Hydrophobic Expanded Vermiculite as a Cleaning Agent for Contaminated Waters
J. Martins and R. Fernandes ..........2297–2299
Treatment Strategy for Cr(VI)-Bearing Wastes
C. F. Lin, W. Rou and K. S. Lo ..........2301–2304
Application of Electrodialysis in Purification and Reuse of Spent Alkaline Process Streams
Z. Xue, Z. Hua and N. Yao ..........2305–2308
Heavy Metals Removal from Wastewater by Using Activated Peat
J. S. D'Avila, C. M. Matos and M. R. Cavalcanti ..........2309–2312
Application of Ultraviolet Radiation for Water Disinfection and Purification in Poland
J. Sobotka ..........2313–2316
The Purification Efficiency of Planted Soil Filters for Wastewater Treatment
R. Netter ..........2317–2320
Contamination of Alluvial Aquifers by Metal Industries in Parts of Central Ganga Basin, India
A. Ali ..........2321–2324
Use of Biologically Active Barriers for in situ Treatment of Contaminated Groundwater
C.-M. Kao and R. C. Borden ..........2325
Trace Metal Soil Quality Criteria to Protect Ground Water
J. Lee, B. Chen, H. E. Allen, C. P. Huang, D. L. Sparks and P. Sanders ..........2327–2329
Bioremediation of PAH-Contaminated Soil via In-Vessel Composting
A. O. Adenuga, J. H. Johnson, jr, J. N. Cannon and L. Wan ..........2331–2334
Interpretation of the Storet Data Base for Atrazine in Ground Water Using a Geographic Information System
R. T. Paulsen, A. E. Moose and V. M. Whitledge ..........2335
Nonionic Surfactant Sorption onto Soil
Z. Liu, D. A. Edwards and R. G. Luthy ..........2337–2340
Enhancing Polynuclear Aromatic Uptake into Bulk Solution with Amphiphilic Colloidal Aggregates
D. A. Edwards, Z. Liu and R. G. Luthy ..........2341–2344
A New Approach for the Analysis of Mixture Toxicity Data
C. N. Haas ..........2345–2348
Effectiveness of a Secondary Impoundment System in Reducing Industrial Wastewater Toxicity
A. Khan, D. Kent, J. Barbieri, S. Khan and F. Sweeney ..........2349–2352
Chronic Toxicity of a Fluoride Mixture to Freshwater Organisms
A. Khan, D. Kent, J. Barbieri and S. Khan ..........2353–2356
Evaluation of Toxicity in Receiving Streams
J. Zagorc-Koncan and M. Dular ..........2357–2360
Bioaccumulation of Polychlorinated Biphenyls and Organochlorine Pesticides in Selected Fish Species as an Indicator of the Pollution of Aquatic Resources in Vojvodina, Yugoslavia
M. Vojinovic-Miloradov, P. Marjanovic, D. Buzarov, S. Pavkov, Lj. Dimitrijevic and M. Miloradov ..........2361–2364
Evaluation of Landfill Effects on Aquatic Ecosystems Using Benthic Macro-Invertebrates
L. Cingolani and A. Morosi ..........2365–2367
Toxicity of Reaction Products from Enzymatic Oxidation of Phenolic Pollutants
P. E. Heck, I. J. Massey and M. D. Aitken ..........2369–2371
Exposure Assessment for the New Bedford Harbor Superfund Site
L. S. Garton, J. S. Bonner, A. N. Ernest and R. L. Autenrieth ..........2373–2376
Verification of Dispersion Model on Anaerobic Reaction Simulation
S.-K. Tseng, R.-T. Lin and K.-L. Liau ..........2377–2380
Pig Wastewater Treatment in Water Hyacinth Ponds
C. Polprasert, S. Kessomboon and W. Kanjanaprapin ..........2381–2384
An Estimation of Safety of Ozonation and Chlorination of a Water Purification Plant
T. Sato, H. Yamamori, H. Matsuda, H. Nagase and H. Kito ..........2385–2388
Spherical Diffusion Model of Interspecies Hydrogen Transfer in Steady-State Methanogenic Reactors
D. P. Smith ..........2389–2392
Use of Biosurfactants Produced by Nocardia amarae for Removal and Recovery of Non-Ionic Organics from Aqueous Solutions
R. Sutton ..........2393–2396
Nitrification Treatability of Whole Microorganisms Immobilized by the PVA-Freezing Method
H. Asano, H. Myoga, M. Asano and M. Toyao ..........2397–2400
Experimental Studies on Advanced Treatment of Wastewater for Amenity Use
S. Kuribayashi ..........2401–2404
High Load Trickling Filters. Biofilm Accumulation and Sludge Production
P. Battistoni, G. Fava and A. Gatto ..........2405–2408
Comparison Between Thermophilic and Mesophilic Anaerobic Digestion of Sewage Sludge Coming from Urban Wastewater Treatment Plants
F. Cecchi, P. Pavan, A. Musacco, J. Mata-Alvarez and C. Sans ..........2409–2412
On-Line Diagnosis of Do-Probe Condition in the Activated Sludge Process
H. Spanjers and G. Olsson ..........2413–2416
Concepts for Minimizing Emissions at Activated Sludge Plants
A. B. Pincince ..........2417–2420
Solubilization of Particulate Cellulose Using Anaerobic Acidogenesis
Y. T. Chyi and A. D. Levine ..........2421–2424
Computer-Aided Design for Stabilization Ponds
X.-W. Li ..........2425–2428
Initial Studies on the Anaerobic Sequencing Batch Reactor
R. R. Dague, C. E. Habben and S. R. Pidaparti ..........2429–2432
Rapid Removal of Colloidal Organics from Domestic Wastewater
B. W. Bunch and D. M. Griffin Jr. ..........2433–2436
Fine Bubble Aeration Using a High Density Diffuser System
K. Thatcher ..........2437–2440
Uasb Treatment of Monosodium Glutamate Wastewater; Dynamic and Kinetic Behaviour of the Start-Up of the Reactor
Y.-S. Cao, H. Zhang and Y.-Z. Li ..........2441–2444
Studies Aimed at Improving Wastewater Filtration in Terms of COD and AOX Elimination
M. Dohmann, T. Grünebaum and J. P. Sanz ..........2445–2448
A Study of Controlled Recirculation of Anaerobic Activated Sludge Digestion Reactors
C.-F. Ouyang and H.-Y. Lin ..........2449–2452
A New Operation of Carbohydrate-Containing Wastewater Treatment in an Anaerobic Fluidized Bed System
A. Matsumoto, M. Sakamoto and T. Noike ..........2453–2456
Kinetics of Polymeric Substrate Removal by Activated Sludge: Hydrolysis of Polymers is the Rate-Determining Step
Y. Ubukata ..........2457–2460
Operational Determination of the Activated Sludge Process Using Neural Networks
R. D. Tyagi and Y. G. Du ..........2461–2464
A Pilot Plant Study of the Anaerobic Digestion of a Mixture of Municipal Sewage and Industrial Sludges
K. Sugrue, G. Kiely and E. McKeogh ..........2465–2468
An Experimental Investigation of Mechanism and Operating Conditions of Multi-Stage Reversing-Flow Bioreactor (MRB) in Treating Domestic Wastewater
S. Arora and T. Mino ..........2469–2472
Practice of Quasi-Optimum Controlling Urban Sewage Conveyance System of Moscow
Yu. A. Ermolin and V. A. Zagorsky ..........2473–2476
The Aspect of Energetic Uncoupling of Microbial Growth in the Activated Sludge Process - OSA System
P. Chudoba, J. Chudoba and B. Capdeville ..........2477–2480
Fluidization and Sedimentation of Carrier Material in a Pilot-Scale Airlift Internal-Loop Reactor
J. Cai, Th. J. Nieuwstad and J. H. Kop ..........2481–2484
Infiltration of Pretreated Wastewater from Stormwater Overflow Tanks
I. Rohrer ..........2485–2488
Investigations on Large Storm-Water Retention Tanks in Munich
M. Brechenmacher, H. Wirth and K. Gaeffgen ..........2489–2492
Suppressive Effects on Filamentous Bulking by Addition of Corn Cob Flour and Divalent Metal Ions
T. Iyo, T. Yoshino and S. Ohno ..........2493–2496
A Case Study Relating Activated Sludge Nutrient Loadings to the Appearance of Nocardia spp. Foaming
C. Hanson, K. Atasi, J. Packman, E. Singleton and A. Glymph ..........2497–2500
Wastewater Treatment Technologies Accomplished in a Pseudofluidized Bed Reactor
M. Y. Kigel and J. F. Shultis ..........2501–2504
Cells on Rotating Fibers for Wastewater Treatment
R. Clyde ..........2505–2506
New Technology for Wastewater Treatment
R. Secerov-Sokolovic, S. Sokolovic and B. Galesev ..........2507–2509
Improved Performance of Activated Sludge with Addition of Inorganic Solids
R. B. Bowen and B. A. Dempsey ..........2511–2514
Training Treatment Plant Operators Using the “Optrain” Computer Simulator
R. P. Schreiber, M. J. Paulsen and D. E. Schafer ..........2515–2518
Investigations on Activated Sludge Microfauna and Treatment Plant Disfunctions
M. Cossignani, L. Cingolani, L. Giacché and R. Miliani ..........2519–2522
Sequencing Batch Reactors - An Overview
K. L. Norcross ..........2523–2526
Relationship between Activated Sludge Flocculation Characteristics and Cell-Surface Polysaccharide Concentration
E. J. Wahlberg, T. M. Keinath and D. S. Parker ..........2527–2530
A New Dimensionless Criterion for the Oxygen Transfer Efficiency in Both Surface and Subsurface Aeration Systems
T. Ognean ..........2531–2534
Determination of Some Kinetic Parameters by Respirometry
M. Roš and M. Dular ..........2535–2538
Relationship for Clarification Efficiency of Circular Secondary Clarifiers
N. S. Voutchkov ..........2539–2542
Solids Concentrations in a Treatment Plant Effluent
M. Defrain and F. Schmidt ..........2543–2546
Anionic Surfactants Removal and Biodegradation in a Large Treatment Plant
P. Romano and M. Ranzani ..........2547–2550
Eutrophication Studies on Tolo Harbour, Hong Kong
Y. S. Sin and K. W. Chau ..........2551–2554
Correlation of Water Quality Parameters in Tolo Harbour, Hong Kong
K. W. Chau and Y. S. Sin ..........2555–2558
The Way to Control Water Pollution of the Huaihe River
Y. Liu and W.-H. Zhu ..........2559–2562
Influence of Motor Vehicle Exhausts on Chemical Components in Rainwater
A. Adachi and T. Kobayashi ..........2563–2566
The Determination of Aquatic Humic Acids
M. Kaštelan-Macan, Š. Cerjan-Stefanovic and D. Jalšovec ..........2567–2570
Partitioning of a Surfactant Between Lake Water, Suspended Solids and Sediment
K. Araano and T. Fukushima ..........2571–2574
Characteristics of Colloids in Landfill Leachate
V. Gounaris, P. R. Anderson and T. M. Holsen ..........2575–2578
Water Reclamation of the Po River in the Turin Area
P. Romano, R. Ranzani and F. Tecchiati ..........2579–2582
The Use of Liquid-Solid Extraction, Capillary Column GC/MS for the Analysis of Chlorinated Acids and Phenols in Drinking Water
R. Infante, C. Gutierrez and C. Pérez ..........2583–2586
Applied Program Package for Studying Impurities Transport in Streams Polluted by Point Sources
A. Smirnov ..........2587–2590
Finite-Difference Modelling for a One-Dimensional Rectangular Estuary
Y. S. Sin ..........2591–2594
Watermolds and Their Activity in Kumaun Himalaya, India
R. D. Khulbe ..........2595–2598
Strategies for Dealing with the Effects of Increasing Urbanisation on Surface Water Quality
L. H. Lötter ..........2599–2603
Environmental Degradation of Urban Areas — Call for Realistic Alternatives for the Developing World
J. Niemczynowicz ..........2605–2608
Total Discharges Taken into Account for Comprehensive Planning of Urban Drainage and Waste Water Treatment
D.-Th. Kollatsch ..........2609–2612
The Izmir Bay Wastewater Management Project — Economical Considerations
I. T. Balkas, F. Juhasz, U. Yetis and G. Tuncel ..........2613–2616
The Carini Experimental Station for Wastewater Reuse in Agriculture — Preliminary Indications
F. Croce, J. R. Pollara, R. L. Oliveri, M. V. Torregrossa and L. Valentino ..........2617–2620
Cost Recovery in Water Services
T. S. Katko ..........2621–2624
Natural Design and Maintenance of Rivers and Streams: Targets, Features and Conclusions
A. Göttle ..........2625–2634