Jan Schippers - Academia.edu (original) (raw)
Papers by Jan Schippers
Water Research, 2019
The production of biologically stable drinking water is challenging in conventional surface water... more The production of biologically stable drinking water is challenging in conventional surface water treatment plants. However, attainment of biological stability is essential to avoid regrowth in disinfectant-free distribution systems. A novel application of ultrafiltration as a posttreatment step to enhance biological stability of drinking water produced in an existing conventional surface water treatment plant was investigated. The conventional full-scale plant
Document(en) uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science
Many reverse osmosis (RO) plants run smoothly, many have suffered from membrane fouling, and many... more Many reverse osmosis (RO) plants run smoothly, many have suffered from membrane fouling, and many other plants either new or old still suffer from membrane fouling. Fouling may result in a variety of problems, such as: the need for (frequent) membrane cleaning, the reduction of production capacity and/or plant availability, a higher energy consumption during treatment, a decrease in produced water quality, making RO installations less reliable, and finally a frequent replacement of the RO membranes. Figure 1 shows old RO elements and old cartridge filters from a desalination plant before their final disposal.
Seawater Reverse Osmosis Desalination: Assessment and Pre-treatment of Fouling and Scaling, 2021
The main learning objectives of this chapter are the following: • Understand and be able to apply... more The main learning objectives of this chapter are the following: • Understand and be able to apply the basic principles of reverse osmosis, such as: recovery, salt passage, salt rejection, concentration polarization, effect of temperature, energy consumption.
Physics in Technology, 1979
In the last twenty years world desalination capacity for sea water and brackish water has increas... more In the last twenty years world desalination capacity for sea water and brackish water has increased sharply. This rapid expansion has resulted in an increasing number of developments in all kinds of desalination processes and equipment
The Environmentalist, 1993
Desalination, 1980
... Rijswijk (The Netherlands) SUMMARY The current methods used to determine the fouling characte... more ... Rijswijk (The Netherlands) SUMMARY The current methods used to determine the fouling character-istics of ... The mathematical description of gelfiltration without compaction is simple and applicable for the ... is illustrated in Figure 6 in respect of treated waste water from Dordrecht ...
Journal of Membrane Science
Arid countries throughout the world are heavily reliant on seawater desalination for their supply... more Arid countries throughout the world are heavily reliant on seawater desalination for their supply of drinking and municipal water. The desalination industry is large and rapidly growing, approaching more than 20,000 plants operating or contracted in greater than 150 countries worldwide and capacity projected to grow at a rate of 12% per year for the next several decades (http://www.desaldata.com; 2016). Desalination plants are broadly distributed worldwide, with a large and growing capacity in what will be referred to as the "Gulf" region throughout this manual. Here the Gulf refers to the shallow body of water bounded in the southwest by the Arabian Peninsula and Iran to the northeast. The Gulf is linked with the Arabian Sea by the Strait of Hormuz and the Gulf of Oman to the east and extends to the Shatt al-Arab river delta at its western end. One of the operational challenges facing the industry is also expanding globally – the phenomena termed harmful algal blooms or H...
This paper describes the novel application of biological activated carbon filtration (BACF) with ... more This paper describes the novel application of biological activated carbon filtration (BACF) with oxygen supply to control biofouling on reverse osmosis (RO) membranes without using biocides. Pilot research was performed in the scope of large scale (10,000 m 3 .d -1 ) ultra pure water production in Emmen (The Netherlands) using wwtp effluent as water source. The results obtained show that BACF with oxygen supply is a promising technology for the prevention of biofouling on reverse osmosis membranes. In case the wwtp effluent was only pretreated by ultrafiltration (UF), an exponential increase of the RO trans membrane pressure was observed after only 3 days of operation, indicating the occurrence of biofouling on the RO module. In case the wwtp effluent was pretreated by UF and additional BACF with oxygen supply, biofouling was not observed during the entire runtime of the experiment (120 days). It is presumed that BAC filters remove easily degradable carbon, which is present in the w...
Journal of Water Supply: Research and Technology-Aqua, 2008
About 45% of the total drinking water in Ghana is produced from groundwater. The presence of arse... more About 45% of the total drinking water in Ghana is produced from groundwater. The presence of arsenic and manganese in groundwater above the recommended WHO drinking- water guidelines pose a threat to consumers' health. To provide additional information on groundwater quality in the gold-belt zone of Ghana, nearly 290 well water samples from three regions namely Ashanti, Western and Brong-Ahafo, were analyzed for the presence of arsenic, iron and manganese. It was found that 5-12% of sampled wells had arsenic levels exceeding the 10m gl 21—WHO provisional guideline value. Communities within the studied area with high arsenic presence in their groundwater are located within the Birimian and Tarkwaian geological formations. Most of these arsenic contaminated wells (70%) have been in use for more than 15 years. Brong-Ahafo, Ashanti and Western regions had 5%, 25% and 50% of wells, respectively with iron levels above 0.3 mg l21, the drinking-water guideline value commonly accepted for iron. Thirteen percent of wells in Ashanti and 29% in the Western region exceeded 0.4 mg l21—the WHO health-based
Desalination, 1980
Abstract The possibilities of removing salts from Rhine water by means of reverse osmosis depend ... more Abstract The possibilities of removing salts from Rhine water by means of reverse osmosis depend very considerably on the efficiency of the usable pretreatment techniques. Existing purification systems used for the preparation of drinking water are usually not oriented towards this task. Experiments carried out during the period from 1971 to 1977 with Rhine water show that this water can be so purified by coagulation with ferric salts that tubular membrane systems can be used. An additional treatment is necessary for spiral-wound and hollow fibre membranes. Experiments with one of the most promising techniques in this area, i.e. “in line coagulation” have shown that interesting results can be achieved with this. If, however, humic substances are present, this process is seriously disturbed because these compounds react with the cation-active polymer added. It has been shown that these humic substances can be conclusively removed by adjusting the addition of ferric salts in the preceding coagulation process to a sufficiently high level.
Water Research, 2019
The production of biologically stable drinking water is challenging in conventional surface water... more The production of biologically stable drinking water is challenging in conventional surface water treatment plants. However, attainment of biological stability is essential to avoid regrowth in disinfectant-free distribution systems. A novel application of ultrafiltration as a posttreatment step to enhance biological stability of drinking water produced in an existing conventional surface water treatment plant was investigated. The conventional full-scale plant
Document(en) uit de collectie Chemische ProcestechnologieDelftChemTechApplied Science
Many reverse osmosis (RO) plants run smoothly, many have suffered from membrane fouling, and many... more Many reverse osmosis (RO) plants run smoothly, many have suffered from membrane fouling, and many other plants either new or old still suffer from membrane fouling. Fouling may result in a variety of problems, such as: the need for (frequent) membrane cleaning, the reduction of production capacity and/or plant availability, a higher energy consumption during treatment, a decrease in produced water quality, making RO installations less reliable, and finally a frequent replacement of the RO membranes. Figure 1 shows old RO elements and old cartridge filters from a desalination plant before their final disposal.
Seawater Reverse Osmosis Desalination: Assessment and Pre-treatment of Fouling and Scaling, 2021
The main learning objectives of this chapter are the following: • Understand and be able to apply... more The main learning objectives of this chapter are the following: • Understand and be able to apply the basic principles of reverse osmosis, such as: recovery, salt passage, salt rejection, concentration polarization, effect of temperature, energy consumption.
Physics in Technology, 1979
In the last twenty years world desalination capacity for sea water and brackish water has increas... more In the last twenty years world desalination capacity for sea water and brackish water has increased sharply. This rapid expansion has resulted in an increasing number of developments in all kinds of desalination processes and equipment
The Environmentalist, 1993
Desalination, 1980
... Rijswijk (The Netherlands) SUMMARY The current methods used to determine the fouling characte... more ... Rijswijk (The Netherlands) SUMMARY The current methods used to determine the fouling character-istics of ... The mathematical description of gelfiltration without compaction is simple and applicable for the ... is illustrated in Figure 6 in respect of treated waste water from Dordrecht ...
Journal of Membrane Science
Arid countries throughout the world are heavily reliant on seawater desalination for their supply... more Arid countries throughout the world are heavily reliant on seawater desalination for their supply of drinking and municipal water. The desalination industry is large and rapidly growing, approaching more than 20,000 plants operating or contracted in greater than 150 countries worldwide and capacity projected to grow at a rate of 12% per year for the next several decades (http://www.desaldata.com; 2016). Desalination plants are broadly distributed worldwide, with a large and growing capacity in what will be referred to as the "Gulf" region throughout this manual. Here the Gulf refers to the shallow body of water bounded in the southwest by the Arabian Peninsula and Iran to the northeast. The Gulf is linked with the Arabian Sea by the Strait of Hormuz and the Gulf of Oman to the east and extends to the Shatt al-Arab river delta at its western end. One of the operational challenges facing the industry is also expanding globally – the phenomena termed harmful algal blooms or H...
This paper describes the novel application of biological activated carbon filtration (BACF) with ... more This paper describes the novel application of biological activated carbon filtration (BACF) with oxygen supply to control biofouling on reverse osmosis (RO) membranes without using biocides. Pilot research was performed in the scope of large scale (10,000 m 3 .d -1 ) ultra pure water production in Emmen (The Netherlands) using wwtp effluent as water source. The results obtained show that BACF with oxygen supply is a promising technology for the prevention of biofouling on reverse osmosis membranes. In case the wwtp effluent was only pretreated by ultrafiltration (UF), an exponential increase of the RO trans membrane pressure was observed after only 3 days of operation, indicating the occurrence of biofouling on the RO module. In case the wwtp effluent was pretreated by UF and additional BACF with oxygen supply, biofouling was not observed during the entire runtime of the experiment (120 days). It is presumed that BAC filters remove easily degradable carbon, which is present in the w...
Journal of Water Supply: Research and Technology-Aqua, 2008
About 45% of the total drinking water in Ghana is produced from groundwater. The presence of arse... more About 45% of the total drinking water in Ghana is produced from groundwater. The presence of arsenic and manganese in groundwater above the recommended WHO drinking- water guidelines pose a threat to consumers' health. To provide additional information on groundwater quality in the gold-belt zone of Ghana, nearly 290 well water samples from three regions namely Ashanti, Western and Brong-Ahafo, were analyzed for the presence of arsenic, iron and manganese. It was found that 5-12% of sampled wells had arsenic levels exceeding the 10m gl 21—WHO provisional guideline value. Communities within the studied area with high arsenic presence in their groundwater are located within the Birimian and Tarkwaian geological formations. Most of these arsenic contaminated wells (70%) have been in use for more than 15 years. Brong-Ahafo, Ashanti and Western regions had 5%, 25% and 50% of wells, respectively with iron levels above 0.3 mg l21, the drinking-water guideline value commonly accepted for iron. Thirteen percent of wells in Ashanti and 29% in the Western region exceeded 0.4 mg l21—the WHO health-based
Desalination, 1980
Abstract The possibilities of removing salts from Rhine water by means of reverse osmosis depend ... more Abstract The possibilities of removing salts from Rhine water by means of reverse osmosis depend very considerably on the efficiency of the usable pretreatment techniques. Existing purification systems used for the preparation of drinking water are usually not oriented towards this task. Experiments carried out during the period from 1971 to 1977 with Rhine water show that this water can be so purified by coagulation with ferric salts that tubular membrane systems can be used. An additional treatment is necessary for spiral-wound and hollow fibre membranes. Experiments with one of the most promising techniques in this area, i.e. “in line coagulation” have shown that interesting results can be achieved with this. If, however, humic substances are present, this process is seriously disturbed because these compounds react with the cation-active polymer added. It has been shown that these humic substances can be conclusively removed by adjusting the addition of ferric salts in the preceding coagulation process to a sufficiently high level.