Simulation studies on the effects of temperature on the efficiency of the bioreactor

Simulation studies on the effects of temperature on the efficiency of the bioreactor with the participation of fecal sewage

The aim of the research was to study the effect of temperature on the efficiency of the bioreactor with the participation of fecal sewage. Simulation studies were carried out in the simulator developed in Canadian company Hydromantis – GPS-X, Version 5.0.

The design model of the sewage plant consists of a circular primary clarifier, a plug flow tank (system MUCT) and two circular secondary clarifiers. I have used the library CNPLIB while simulating of the project in GPS-X. For describing wastewater influent from the collector and wastewater transported from the septic tank, I have used the mathematical model TSSCOD. In the description of sedimentation in the circular primary clarifier and in the secondary clarifiers, I chose the model Simple1d. I chose the model ASM2d to characterize the processes occurring in the bioreactor. While I was configuring objects related to the input, I was using the spreadsheet included with the GPS-X, named Influent Advisor.

I examined six series of simulation, which differed by the value of the temperature in which processes of wastewater treatment were occurring, and the participation of fecal sewage into the wastewater from the collector. Simulation studies were carried out at 10℃ and 20℃ without wastewater from a septic tank, and at 10% and 20% of their participation, too. During the entire process of simulation, the various parameters (like composition and quality of sewage) were maintained constantly.

An analysis of the results of the simulations showed that lowering the temperature at which the processes of wastewater treatment were being carried out, affected the efficiency of the
removal of impurities in the system. On the other hand, increasing the participation of fecal sewage in wastewater from the collector, improves BOD5 and COD removal efficiency, and at the same time worsens the total nitrogen removal efficiency. Also, I observed that during the entire activity of simulation efficiency of removal, the total phosphorus was better, with 20% participation of wastewater transported from the septic tank than it was with compared to the earlier 10% participation.

<em>[Great job!]</em>

INTRODUCTION

To train a professional is not an easy task. It involves to provide providing a set of elements of an intellectual, motivational and ethical nature, while joining together in order to get find people who will enrich and improve our society in a the near future.
The Admission Center of the Autonomous University in San Francisco, is a permanent academic unit, which provides information about the professional careers that the univerisity offers, and the school's admission procedures. Furthermore, it ensures the transparency of the processes, giving security and welfare to all applicants.

<em>[Nicely done. :-)]</em>

Check the essay, please!

Education is very important for developing a future personality, and becoming a professional, and a leader. Teachers usually assign homework for students so that they have to get build their knowledge at home besides as well as school. While there are advantages to both having homework and not having any, I believe that doing homework is more beneficial.

First of all, I think that it is important for young people to do their homework in order to learn how to find important information. Nowadays, in the global age of information technology, it is quite difficult to understand weather whether it is you've found the information you need or not, and weather whether you should use it or not. For instance, when I was preparing for my biology class, I had to find out about the researches of lung cancer in the twentieth century. I gave out submitted my work and got a good result, while my peers’ grades were not satisfying due to their inability to find an appropriate information.

In addition, from my experience, children become more responsible, when they do homework. For instance, when a sister of mine my sister went to university, she understood that a large part of her life depends on herself. She had to study hard to get good grades. Nobody in my family could help her, because finances were an unfamiliar topic to all of us. My sister understood that it was her responsibility to get her diploma and find a job to support herself and her future family.

Finally, I believe that students can find their way out learn from difficult situations. This is due to my belief that homework can sometimes seem challenging. One has to research a lot of books, surf the Internet, and consult parents or friends. For example, when I was preparing my art project, where I had to tell talk about me my favorite artist (Salvador Dali), there was only a small amount of information online about him in Ukrainian, so I had to read and work a lot to make my project.

To sum it up, doing homework is an important part of the educational process. Children can get develop a lot new knowledge at home. Besides Moreover, they develop their skills of finding information, becoming more responsible, and finding ways out of difficult situations.

<em>[Very good indeed! Great structure, good thesis. We don't "get knowledge", we "develop" or "grow" our knowledge. When you're writing a list of a few things separated by commas, remember to use "and" before the last item in the list to make your sentence complete. Keep it up!]</em>

The Befana day!

Today is the Epiphany celebration. In Italy, we call it <em>Epifania</em>, but in the slang all of us call it "La befana". When Christmas passes, you think, "Ohh, Christmas has finished already!" When the last day of the year passes, you say, "Ohh, our holydays holidays are over." But the Befana Day saves you the day before start the school starts again! I love it, maybe more than Christams! Maybe also for another reason: Every year, since me and my sister were little, my grandmother has dressed herself like a Befana, entered in our home with many stockings and woken up us! It's a tradition by now, and I don't think I'll ever won't be never too old for this kind of things, because when I'll be I'm old, I'll remember how my grandmother is fantastic!

<em>[Good. Interesting celebration! Be careful about your punctuation around quotations, and remember to use spaces after your commas. :-)]</em>

6/1/2014

No.2

This afternoon, I received a call from my previous the company I previously worked for. They asked me whether I am willing to work for them as the clerk of F&B. I told them I will reply tomorrow. I don't know what to do; I'm in a dilemma now. The reason I resigned was that I wanted to work in the office, but at that time I had to run around following my boss who was a chef to run around. At that time, I was the his assistant and translator of him. That was an easy job and I had a lot spare time. I felt that I couldn't learned anything I wanted to, so I left. Then, they called me and gave me another offer. I am confused. The salary is not high at all and that department is not well-manged, which was (they ignored me). But it's hard to look for a job, as the New Year's is coming. The head of the F&B department is from Switzerland, an easy-going guy. I am not in a rush and I don't want to be. How do I choose?

Tomorrow, I will be out of the town and go to visiting my grandparents. They are living in another city, 3 hours by coach from here. I will bring them some homemade Swill Roll. I hope they like it. I will stay there for 5 days and go back home on this Saturday. We love each other even though we just meet only see each other a few times a year. My father moved to Guangzhou when he was 18 years old, and then he met my mother and stayed in that city. My father doesn't call my grandparents very often, but I know he loves them. He is just not good at expressing himself, the same as me. I miss them so much!

Today, I made some Walnut Crispy and Swill Roll. But I mistook that the glutinous rice flour for the plain flour, so I failed to make the Walnut Crispy. I didn't want to give up. I ran to a store and asked the shopkeeper about the difference between these two kinds of flour. Finally, I discovered they are totally different types of flour! I brought the plain flour back home and made the Walnut Crispy again. Guess what? I did it - woohooo! So every ingredient plays an important role in all food!


Good day
ZX

<em>[Great job! Please remember to use proper spacing around your punctuation! The punctuation should be right next to the word it follows, with a space after it. I've added spaces after all of your sentences for you. Nice work on your Walnut Crispy, and good luck deciding on the new job offer! :-)]</em>

Late Introduction :)

Hello there. I'm currently a freshman in college (I'm not telling what my course/degree is :P).  I would like to improve my English skills.  I also like Korean and I started studying the language a few months ago, but I decided to focus more on improving my English skills first.

Let's be friends. ^_^

cont.

Since high school, I've been having a hard time with my English skills. I think I'm quite behind compared to my classmates.  I also have a friend who feels the same. Although, despite that feeling, she still wants to study another language. She likes the Korean language and eventually exposed me to the language.  I have also studied Korean with her, but I stopped after few months.  It was because, everytime I try to study Korean, I'm always having this thought think that I should be fluent (or at least advanced) in English.  Because of that, I'm lagging with my studies in Korean.  I told myself to focus and improve my English skills first.

If I need help (or my friends need help) with a language, I will use this account to help them. ^_^

<em>[Great! Welcome! Remember when you're writing, you don't need to press "enter" after each period; it looks better when you write in paragraph form. :-)]</em>

Epifania

Hi to everyone! Today is a holiday in Italy is Holiday and we call it "la Befana". A <em>b</em><em>efana</em> is an old, ugly, but nice person. The legend says that during the night from the 5th to the 6th of January she flies over the towns bringing gifts and sweets to children. If a child has not been very polite or diligent during the previous year, she would take him/her a lot of charcoal (sweet charcoal), but if he/she has been a good son/daughter, she would take him/her lots of sweets, candies and chocolate.

This is my first writing and I'm try to build confidence with this new (for me) method to improve my English.

Cheers

<em>[Great job! It's interesting for me to read about holidays that I've never heard of. Keep it up. :-)]</em>