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)
Waste Pre-Treat­­ment
Pas­teur­iza­tion System
Self clean­ing digester
Robust Pumps

Lat­est news

Joint project Aci­Di – Project start

Organ­ic acids under the ana­lyt­i­cal mag­ni­fy­ing glass: Har­mo­niza­tion of exist­ing mea­sure­ment meth­ods for the opti­mized oper­a­tion of diges­tion and bio­gas plants Read the com­plete press release here

Instal­la­tion Progress at Entsorgungs­be­triebe Lübeck

The pro­cess­ing line with our robust and reli­able BS20 sep­a­ra­tion press now is installed with a cus­tomised steel struc­ture. The hydrauli­cal­ly oper­at­ed sep­a­ra­tion press effi­cient­ly sep­a­rates the non-fer­mentable frac­tions of almost any waste. It is impor­tant to have a...

News from Lübeck

  Next step at Entsorgungs­be­triebe Lübeck! Upload­ing and installing the 45 qm Ves­sel. For this pur­pose, a part of the plant roof was tem­porar­i­ly removed, the ves­sel was brought in from the roof open­ing and fixed in place. Thanks to all for the excellent...

Kick-off Entsorgungs­be­triebe Lübeck

Project start and kick-off meet­ing at Entsorgungs­be­triebe Lübeck for the new con­struc­tion of a pro­cess­ing tech­nol­o­gy for food waste! Dur­ing this vis­it, those involved in the project were able to get to know each oth­er bet­ter and ini­tial goals, mile­stones and other...

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!

Events

IFAT 24 Munich

Save the Date! 13-17.05.2024 Munich Trade Fair. Vis­it us at booth 345 in hall A4! Arrange your per­son­al appoint­ment in advance. Sim­ply fill out the con­tact form and enter your pre­ferred date! We look for­ward to see­ing you!

ECOMON­DO 2023 in Rimini

This year's ECOMON­DO, the green tech­nol­o­gy trade fair, starts on 7 Novem­ber in Rim­i­ni. Vis­it us at the Ger­man Pavil­ion in Hall 5, Block 71 . We look for­ward to inter­est­ing dis­cus­sions and per­son­al con­tacts! You will find us in Hall 5, Block 71. www.ecomondo.com...

Pol­lutec 2023 in Lyon

Pol­lutec 2023 in  Lyon France 10th to 13th Octo­ber As part of our par­tic­i­pa­tion at the joint stand of Bay­ern Inter­na­tion­al, we will be on site at this year's Pol­lutec, a major inter­na­tion­al show­case for inno­v­a­tive solu­tions and proven prac­tices in the environmental...

Lec­ture: Inno­v­a­tive small-scale bio­gas plant

At the 9th Annu­al Con­fer­ence "Con­struc­tion and Oper­a­tion of Com­mer­cial Kitchens and Com­pa­ny Cater­ing 2023", every­thing will revolve around trends and effi­cien­cy in the sec­tor. As part of the exten­sive pro­gramme, Dr. Michael Meir­er, Rhein­tal­gas Asso­ci­a­tion, and Tobias...

Pol­lutec 2023 in Lyon

From 10 to 13 Octo­ber 2023, the envi­ron­men­tal and ener­gy solu­tion show will take place again in Lyon, and we will be there at the joint stand of Bay­ern Inter­na­tion­al. We look for­ward to inter­est­ing dis­cus­sions and per­son­al con­tacts! Mark your cal­en­dar now!...

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...
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