16 Questions 50 Answers 0 Followers
Questions related from Hopewell Molefe
I wish to simulate a typical system like a nitrogen removal system such as MLE system, N and P removal system like UCT and JHB system because I have the steady state design models for each unit...
17 December 2016 1,137 21 View
I was just wondering if I could use Aspen to model biological wastewater treatment plants with the following units? primary settling tank & secondary settling tank biological reactor...
28 November 2016 7,467 9 View
In my design I will be thickening the WAS by a gravity thickener and I'd like to know some typical solids loading rate i.e. kgTSS/m2.d. I'd be thickening the solids to 6% solids conc. (60000...
08 November 2016 3,364 5 View
Water is being drilled from underground and pumped to tank reservoirs at relatively high elevation and is distributed by gravity feed to the residential areas in the village. The water is crystal...
26 May 2016 1,665 10 View
I have achieved significant success in reducing my sulphates in the effluent by dosing calculated quantities of lime Ca(OH)2. I found that I reduce the most sulphates out the optimum ph range is...
06 July 2015 2,122 6 View
I want to specify the conical tank I need from the supplier, please any information/heuristics to design a settling tank. I'm treating 10 000 Litres/day of effluent every day from our plant before...
17 June 2015 623 5 View
What else can I use apart from titration with expensive silver nitrate and mercury nitrate methods? I have to test for chlorides in my effluent, I'm struggling to get silver nitrate solution so...
29 May 2015 4,907 13 View
I have been using Ferric chloride as coagulant on a lab (1Litre Jar), on a pilot scale (treating 1000L of influent) and on one of my sumps treating 9000L of influent. I have a lot aluminium...
20 May 2015 5,829 13 View
How are many kJ/mol of energy released in the exorthermic reaction of sulphuric acid and water?
23 April 2015 3,564 2 View
I'm running a pilot plant doing lime treatment for pH correction and reduction of sulphates through the precipitation of gypsum. The results so far they show that my pilot plant is working well to...
01 April 2015 735 3 View
I have conducted an experiment to make 45% NaOH solution using caustic flakes in a 1L theoretically I should have added 450g which gave a solution of about 40% and had to add 250g extra to make...
30 March 2015 5,198 3 View
We currently want want to make NaOH solution from sodium hydroxide flakes which we already have, we use caustic soda for making sodium hypochlorite. I have conducted experiments on the lab scale...
23 March 2015 6,709 7 View
I'm doing experiments to see if I can use lime to correct our effluent's acidic pH while managing to precipitate sulphates as gypsum sludge and other metal hydroxide sludge Me(OH)2 or Me(OH)3. So...
17 March 2015 6,414 9 View
Could you advice on a better (less costly) method for removing chlorides from effluent wastewater? I want to reduce my chlorides concentration to a level below 1500mg/l before discharge through...
02 March 2015 5,087 7 View
We would like to biologically treat our effluent waste to reduce our sulphates content in the effluent discharge through the municipal sewer and reduce the COD as well. We're currently sorting out...
05 February 2015 8,663 6 View
Please any advice the effluent must betreated for ions like sulphates and chlorides I have read about the Reverse Osmosis and other available technologies that can be used to reduce the...
28 January 2015 4,469 18 View
