I took ENEN 663 - water treatment class with Tay in 2016 and he forever changed and solidify why I wanted to be an environmental engineer. He was an outstanding prof and someone you can go to for any questions you have. I moved to states and started studying for PE this month and I wanted to refer to his notes and I as I started studying, I wanted to send him a thank you note for teaching the class so well, that's when i learned he had passed away. Prof Tay, you will forever be missed! and thank you so much for all you did and the positive impact you left on me and I am sure many others! RIP.

It is really sad to learn that "Prof Tay" had left us. The news made me cry. I still vividly remember my first meeting with him at NTU when I was a new Masters student from China, looking for an advisor. Prof Tay was always ready to help his students. He won the respect from us all. Even though I switched my career from engineering to something else, I have always regarded Prof Tay as my role model, and a source of inspiration.

Rest in peace, Prof Tay! You will live in the hearts of many!

生命無常

願俊华一路走好

願松叶家人節哀保重身體

Joo-Hwa was a valued colleague, and fellow Editor of the Journal of Hazardous Materials. Most importantly he was a friend, whose enthusiasm and positive attitude made our collective work such a joy. We miss him terribly already, and my thoughts are very much with the family. Rest in peace, my friend.

Andrew J Daugulis

Queen’s University

Andrew you were amazing colleague and at Journal of Hazardous Materials an amazing editor. We all very grateful for the wonderful time we spent together …Rest in peace …we at HAZMAT we are thinking of you.

Gianluca Li PUMA

My deepest and dearest condolences to the family of Tay, my dear Editor and friend. I am so sorry to hear this shocking news and pray for all of you. Tay to me was such a bright and happy and cheerful person who was a voice of reason, a voice of passion, and a voice of intellect. He will be genuinely missed and my heart is truly hurting today.

You will always be remembered. HAZMAT will never be the same.

Always and truly,

Lily Khidr

Executive Publisher, Elsevier

台大土木同窗

俊華兄，英年早逝。我們台大土木及世界污水處理工程界一大損失。深感悲傷。望家人節哀順變，保重。

美國波士頓

I pray that in the midst of your sorrow you find comfort in all the joyful memories shared.

悼祭 ：

俊華同學英年辭世、入土為安永登極樂！願家人節哀順變保重身體⋯⋯

林興庭、陳愈惜 叩首

俊華同學一路好走。

家人節哀順變。

俊華兄和我在台湾大學同窗四年。他勤奮好學.成績優良。我和他雖然住在不同一間宿舍，可是我們經常在一起研究功課-碰上課業上的難題時我們就會在圖書館或在我宿舍的餐廳見面討論。有時我們也會東西南北漫談對人生的憧憬、、、、。

畢業後-他先到美國攻讀水利工程，我則對前途尚感茫然-所以先留校當助教。我們從此就断了联系。

再重逢時已是2011年在吉隆坡的同學聚會-時光已经流逝了四十年！相見不相識了！才知道他在污水处理的领域雄覇一方！果然如我在台大就知道他日後會有大成就的！

在大學時他常喜歡哼唱當年的流行歌曲“水長流”。

水長流、、流、，它流去不回頭,,,,,！

這就像我們的一生！流逝的時光永不會頭！我只能愐懷以前曾經有過的年輕歲月，和俊華兄共同享有的一段美好回憶！

俊華兄安息！

鄭夫人及家人節哀！我是能够感受到你們的悲傷的！但祈節哀！

如果有我能够幫上忙的事，我恭候指示！

陳祝達 上

於馬來西亞吉隆坡