AD Plant Rothmühle

Short Project Description

The AD Plant Roth­müh­le treats 25.000 t/y of source sep­a­rat­ed organ­ics col­lect­ed main­ly from pri­vate house­holds. The waste is split into two frac­tions, a course frac­tion >100 mm with leave and yard waste going into a dry AD process and the fine frac­tion <100 mm going into the wet AD. Bio­gas of both sys­tems is col­lect­ed and used in sev­er­al CHP. Fin­ster­walder designed the wet AD and the inte­gra­tion of wet and dry AD. Fin­ster­walder deliv­ered all tech­ni­cal equip­ment and instal­la­tions and com­mis­sioned the sys­tem. Fin­ster­walder super­vised but was not con­tract­ed to serve the civ­il works.

Inte­grat­ed FIN­STER­WALDER Technology

  • 2x Sep­a­ra­tion Press BS20
  • 1x Dou­ble tube heat exchang­er pas­teur­iz­er system
  • 1x Dou­ble tube heat exchang­er con­t­a­m­i­nants heating
  • 2x Floor Scraper
  • 1x Sed­i­ment Sep­a­ra­tor SA05
  • 2x Skim­mer­sys­tem
  • 1x Dou­ble Pis­ton Pump KV20
  • Con­trol system

Overview

Waste Treat­ment Process

Flow Sheet in Detail

(1) RECEIV­ING BUNKER
The receiv­ing bunker has 200 m³ Vol­ume. The waste is trans­ferred into the pre-treat­ment by an auto­mat­ed crane system.
(2) PRE-TREAT­MENT AND CON­T­A­M­I­NANTS REMOVAL
Waste is shred­ed with stan­dard tech­nol­o­gy. The shred­ded waste is dis­trib­uted into two Fin­ster­walder BS20 Biosqueeze units. The reject is going to com­post­ing, the sub­strate pum­pet into the Fin­ster­walder Pas­teur­iz­er (Dou­ble tube heat exchanger).
(3) HEAT­ING WITH DOU­BLE TUBE HEAT EXCHANGER
The dou­ble tube heat exchang­er heats up the­sub­strate to about 75°C.
(4) PUMP­ING TECHNOLOGY
The sub­strate is deliv­ered into the digesters by a Fin­ster­walder KV20 Ball Valve Pump. Usu­al pump tech­nolo­gies are not suf­fi­cient because of high total solids con­tent (20 %), tem­per­a­tures of up to 85°C and amounts of abra­sive sand com­ing with the sub­strate. (up to 10 % of pump­ing volume)
FIN­STER­WALDER SED­I­MENT REMOVAL
In each digester a Fin­ster­walder BR13 Floorscraper is imple­ment­ed (5) . This moves all sol­id sed­i­ments into an exter­nal sed­i­ment trap . The sed­i­ment trap (6) is emp­tied in nec­es­sary cycles. Cur­rent­ly there are 8 t/d of sand removed from the digesters. (7) With­out sed­i­ment removal sys­tem the digesters would be filled with sand with­in 250 days of operation.
FIN­STER­WALDER SKIM­MER UNIT
In each of the digesters a skim­ming unit is imple­ment­ed. (8) The skim­mer removes up-swim­ming mate­r­i­al like fibers and plas­tic pieces that oth­er­wise would form a mat. The sep­a­ra­tion is done by an exter­nal siev­ing machine. (9) The sol­id drop out con­tains fibers but also all the plas­tic. (10)
(11) ENER­GY USE
The wet AD plant pro­duces about 250m²/h bio­gas, the dry AD about 125 m³/h. Both gas streams are stored togeth­er in a 9000 m³ dou­ble mem­brane gas stor­age above the end stor­age tank. Ener­gy gen­er­a­tion hap­pens in sev­er­al CHP units on site. With imple­men­ta­tion of the wet AD sys­tem 800kWel. pow­er have been installed.
(12) USE OF DIGESTATE
In each of the digesters a skim­ming unit is imple­ment­ed. (8) The skim­mer removes up-swim­ming mate­r­i­al like fibers and plas­tic pieces that oth­er­wise would form a mat. The sep­a­ra­tion is done by an exter­nal siev­ing machine. (9) The sol­id drop out con­tains fibers but also all the plas­tic. (10)

Lat­est news

Fin­ster­walder Umwelt­tech­nik now on Youtube

On this chan­nel videos are pub­lished, which show solu­tions as well as infor­ma­tion about our process­es and indi­vid­ual com­po­nents in the field of bio­gas tech­nol­o­gy. Just have a look and subscribe! 

MB con­nect line User Conference

Net­work­ing, exchange of know-how among the par­tic­i­pants, accom­pa­nied by tech­ni­cal pre­sen­ta­tions and user reports - that is the goal of the MB con­nect line user con­fer­ence! On board are cus­tomers from mechan­i­cal and plant engi­neer­ing and build­ing automa­tion as well as...

Inter­est­ing Suc­cess Sto­ry from MB con­nect line

Dig­i­tal­iza­tion for process opti­miza­tion of bio­gas plants with remote access and IOT appli­ca­tion from MB con­nect line: Con­tin­u­ous mon­i­tor­ing of mea­sured val­ues dur­ing ongo­ing oper­a­tion allows con­clu­sions to be drawn about the plant and process sta­tus via remote...

Start of con­struc­tion work at Vil­la Avo­ca­do, Mexico

Work has start­ed on the con­struc­tion of a plant with a capac­i­ty of 650 cubic meters raw bio­gas per hour! The Mex­i­can com­pa­ny, based in Guadala­jara, is a world leader in the pro­duc­tion of avo­ca­do oil and the devel­op­ment of avo­ca­do prod­ucts. In the man­u­fac­tur­ing of...

Report on the com­pact depack­ag­ing plant

Bio­enger­gy Insight 1st issue with focus on Europe. We are pleased to see the inter­est­ing arti­cle on the real­iza­tion of the Fin­ster­walder com­pact treat­ment plant at David­son Envi­ron­men­tal, Cana­da. Read the whole arti­cle: You can find even more inter­est­ing reports and...

Vis­it us on Linkedin

Here you will find reg­u­lar­ly inter­est­ing infor­ma­tion and solu­tions about anaer­o­bic diges­tion of organ­ic waste. Fol­low us!

Expan­sion of the project in Lana/Bolzano

For the anaer­o­bic diges­tion plant in Lana/Bolzano, which has been in oper­a­tion since 2007, an expan­sion and mod­ern­iza­tion was decid­ed in 2018. The design and imple­men­ta­tion of the con­ver­sion by Fin­ster­walder Umwelt­tech­nik into an inno­v­a­tive mod­el plant was...

Coro­na cri­sis: We are still here for you!

We can also be reached dur­ing Coro­na times. The safe­ty and health of our cus­tomers and employ­ees has absolute pri­or­i­ty in times of the Coro­na cri­sis. Due to flex­i­ble work solu­tions, we con­tin­ue to work in the office and part­ly in the home office. As usu­al, you can...

Events

ECOMON­DO 2022

On Novem­ber 8 this year's  ECOMON­DO The green Tech­nol­o­gy Expo starts in Rim­i­ni. We will be there, at the joint booth of Bay­ern Inter­na­tion­al. We are look­ing for­ward to inter­est­ing con­ver­sa­tions and per­son­al con­tacts! You will find us in hall 5, block 71....

Pre­sen­ta­tion at the Hach Waste­water Sym­posia 2022

On 20.09.2022 in Ben­sheim and 11.09.2022 in Munich, Dipl.-Ing. Tobias Fin­ster­walder will give a pre­sen­ta­tion on "Con­tin­u­ous sed­i­ment dis­charge from digesters dur­ing oper­a­tion" as part of the Hach Waste­water Sym­posia. Fur­ther infor­ma­tion at www.hach.com

IFAT Munich 2024

After a 3-year break, IFAT 2022 was the per­fect event to wel­come our cus­tomers and inter­est­ed guests at our booth at the world's lead­ing trade fair for water, sewage, waste and raw mate­ri­als man­age­ment. We are now already look­ing for­ward to IFAT 2024. From 13 - 17 May...

IBBK BIO­GAS # HANDS ON

BIO­GAS # HANDS ON Online Train­ing of IBBK BIO­GAS from Feb­ru­ary 22 to March 15, 2022. The "pro­Bio­gas Inter­na­tion­al" pro­gram is divid­ed into 14 mod­ules. With­in the frame­work of the mod­u­lar online cours­es and inter­ac­tive work­shops, expe­ri­enced bio­gas experts will impart...

AHK busi­ness trip USA

From the 23rd to the 27th of Sep­tem­ber the AHK busi­ness trip will take place in the west (Cal­i­for­nia, Sacra­men­to) and south (Flori­da) of the USA. Here Ger­man com­pa­nies have the oppor­tu­ni­ty to inform them­selves about the mar­ket poten­tial in the field of bioen­er­gy in...

BIO­GAS # HANDS ON

The BIO­GAS # HANDS ON Train­ing of IBBK BIO­GAS takes place from 07.05.2019 to 15.05.2019. This 7-day train­ing is IBBK's pre­mi­um course. The many years of expe­ri­ence of the Ger­man bio­gas experts in the con­text of this train­ing allows the world­wide trans­fer of knowledge...
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