Showing posts with label Municipal Solid Waste. Show all posts
Showing posts with label Municipal Solid Waste. Show all posts

Tuesday, October 16, 2012

Advice to Thiruvananthapuram might not help alleviate the city's looming solid waste crisis

This post is a response to an article published by FirstPost.com with the title "Thiruvananthapuram sinks in its own waste as rulers look for shortcuts" on October 16, 2012.

Public protests - The Hindu
This critique is not about the conceptual or factual validity of the article but it is to distinguish between the short-term and long-term priorities and solutions for the city. In the absence of such a distinction, various stakeholders with the same goal of solving the crisis and with correct models will end up debating ideals and fighting within each other, finally doing no good to the city.

While depicting the situation as: 
When the residents of Vilappilsaala said "no more garbage" to their neighbourhood, the corporation, which is used to an archaic collect-transport-dump routine, didn’t know what to do. They just stopped garbage collection and it started piling up everywhere. The city is putrid today. 
FirstPost suggests a 4-step approach (edited for brevity)
1. Ask the city residents to mandatorily separate waste at source. Once recyclables and organic matter are removed, only about 20 per cent needs to be dumped in a sanitary landfill. 
2. Once the source-segregation is made mandatory, the city corporation can collect both the recyclables door-to-door (women-run self help groups have been doing this). Engage scrap dealers to whom the materials can be sold.

3. The bio-degradable materials can be collected door-to-door and used in compost facilities at several locations in the city.

4. The remaining 20% of waste need to be disposed off in landfills.
Thiruvananthapuram - Deccan Chronicle
The 4-step advise can be followed if the City can get over the current crisis. For whatever reason, if it fails to do so, the crisis will continue like in Campania, Italy. In that case, Firstpost's advise will provide some relief but not real solutions. Therefore, it is irrelevant to the article's subject line. Let me explain how:
The subject line and the article speak about the imminent solid waste crisis in Thiruvananthapuram, but the solution suggested is not a process but a future state that should be achieved. To achieve such a state, the suggested components should evolve together with gradually increasing infrastructure, changing social habits and the city's institutional and financial abilities. Such a change cannot be brought in with sudden interventions in a short span of time.

Thursday, April 19, 2012

History of Gasification of Municipal Solid Waste through the eyes of Mr. Hakan Rylander

This is an excerpt from Let's speak about Waste To Energy..., an interview conducted by Antonis Mavropoulos and published on his Global View of Waste Management Blog****

Mr. Hakan Rylander, CEO Sysav Company Group
Mr. Hakan Rylander is a former President of International Solid Waste Association (ISWA)  and the current CEO of the SYSAV Company Group. He is one of the most experienced WtE engineers I know, involved in all different phases and aspects of a WtE facility. SYSAV is a role model company in WtE.  Mr. Hakan has held many other key-positions e.g. Chairman of the ISWA WtE Working Group, Swedish Representative in the Nordic Association of Waste Management, Chairman of the Scania Society of Engineers. Currently Hakan is also running the R&D Committee of Avfall Sverige.

Antonis Mavropoulos: What can we expect from the (Waste-to-Energy, WTE) technology in terms of improvements?

Hakan Rylander: - to reduce and minimize the amount of bottom ash. (More here)
- to develop a safe and environmentally correct way of final handling of the flue gas cleaning residues and to recover as much as technical and economically possible of the metal content in these residues and in the bottom ash (More here)
- to increase the electrical efficiency in the waste-to-energy plants. (More here)

About the History of Developing Gasification Technology for Municipal Solid Waste (MSW)

Last but not least, in a recent discussion I heard, probably for the 100th time in last two years, that incineration is dead and that gasification and plasma pyrolysis will soon substitute all incineration plants. What is the current status of those technologies? Are they applicable for Mixed MSW? Are there commercial applications and operational experiences? After all,  is it something we can trust?

Antonis: A lot of people say they are promising and they are more environmental friendly than incineration...?

Hakan: Well,