Company lists · Data refreshed September 2026

Top 25 Wastewater treatment biogas facilities based in Germany

Name: Wastewater treatment biogas facilities based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 121 companies tracked

RevenueBase identified 121 wastewater treatment biogas facilities headquartered in Germany as of September 2026 and tracks 1,729 professional contacts across them, including 702 with verified work emails. Berching is the largest hub.

This list covers wastewater treatment biogas facilities headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 22, 2026 86% judged on-target in blind review

121Companies

1,729Contacts tracked

702Verified emails

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The 25 largest wastewater treatment biogas facilities based in Germany

Ranked by team size

Top 25 of 121 wastewater treatment biogas facilities based in Germany, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to wastewater treatment biogas facilities: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	EEW Energy From Waste Gmbh	Indirect evidence	Helmstedt, GermanyHQ checked Sep 22, 2026	1,001-5,000	295 contacts →
	Indirect evidence “Die EEW Energy from Waste GmbH (EEW) ist eines der führenden Unternehmen in Europa auf dem Gebiet der thermischen Abfall- und Klärschlammverwertung.” Source: RevenueBase Database · checked Sep 22, 2026
2	Passavant Energy & Environment	Indirect evidence	Frankfurt, GermanyHQ checked Sep 22, 2026	51-200	134 contacts →
	Indirect evidence “Passavant has always been a name synonymous with excellence of execution through innovation.” Source: RevenueBase Database · checked Sep 22, 2026
3	Planet Biogastechnik Gmbh	Partial evidence	Gescher, GermanyHQ checked Sep 22, 2026	201-500	108 contacts →
	Partial evidence “Biogas pioneer since 1998.” Source: RevenueBase Database · checked Sep 22, 2026
4	Weltec Biopower	Indirect evidence	Vechta, GermanyHQ checked Sep 22, 2026	51-200	58 contacts →
	Indirect evidence “Since its foundation in 2001, the WELTEC Group from Vechta in Lower Saxony, Germany, has been contributing to the success of the energy transition.” Source: RevenueBase Database · checked Sep 22, 2026
5	Balance Erneuerbare Energien Gmbh	Partial evidence	Leipzig, GermanyHQ checked Sep 22, 2026	51-200	56 contacts →
	Partial evidence “BALANCE ist eines der führenden Unternehmen in Deutschland, das sich auf den Betrieb und die Optimierung von Biogasanlagen spezialisiert hat.” Source: RevenueBase Database · checked Sep 22, 2026
6	B T Group	Indirect evidence	Alsfeld, GermanyHQ checked Sep 22, 2026	201-500	49 contacts →
	Indirect evidence “Die B+T Group steht für optimale Ressourcennutzung: Wir erschließen selbst die letzten Prozent der Wertstoffverwertung und wandeln nicht recyclingfähige Abfälle in Energie um –…” Source: RevenueBase Database · checked Sep 22, 2026
7	GI Aqua Tech	Strong evidence	Groß-gerau, GermanyHQ checked Sep 22, 2026	51-200	49 contacts →
	Strong evidence “GI AQUA TECH provides innovative wastewater treatment solutions, committed to a sustainable future for people and planet.” Source: RevenueBase Database · checked Sep 22, 2026
8	ATB Water Gmbh	Strong evidence	Porta Westfalica, GermanyHQ checked Sep 22, 2026	51-200	27 contacts →
	Strong evidence “ATB WATER - Small sewage treatment plants, wastewater treatment technology and sewage technology for every challenge in industry.” Source: RevenueBase Database · checked Sep 22, 2026
9	Biogas Service Tarmstedt Gmbh	Partial evidence	Westertimke, GermanyHQ checked Sep 22, 2026	51-200	24 contacts →
	Partial evidence “Was wir tun, wird Energie Bei Biogas Service Tarmstedt dreht sich alles um die Zukunft der Energieversorgung.” Source: RevenueBase Database · checked Sep 22, 2026
10	Krieg & Fischer Ingenieure Gmbh	Partial evidence	Göttingen, GermanyHQ checked Sep 22, 2026	11-50	22 contacts →
	Partial evidence “Krieg & Fischer is an engineering office with an experienced team of biogas experts consisting of highly-skilled engineers.” Source: RevenueBase Database · checked Sep 22, 2026
11	Almawatech	Indirect evidence	Babenhausen, GermanyHQ checked Sep 22, 2026	51-200	20 contacts →
	Indirect evidence “ALMAWATECH – Anlagenbau & Prozesslösungen für industrielle Wassertechnik Die ALMAWATECH GmbH ist ein familiengeführtes Unternehmen mit langer Tradition in der industriellen…” Source: RevenueBase Database · checked Sep 22, 2026
12	Flexbio Technologie Gmbh	Strong evidence	Einbeck, GermanyHQ checked Sep 22, 2026	11-50	19 contacts →
	Strong evidence “FlexBio Technologie GmbH is one of the leading and innovative companies in the field of wastewater and biogas technology.” Source: RevenueBase Database · checked Sep 22, 2026
13	Agraferm Gmbh	Indirect evidence	Pfaffenhofen A.d. Ilm, GermanyHQ checked Sep 22, 2026	11-50	18 contacts →
	Indirect evidence “AD plants for professionals.” Source: RevenueBase Database · checked Sep 22, 2026
14	EWE Wasser Gmbh	Indirect evidence	Cuxhaven, GermanyHQ checked Sep 22, 2026	11-50	16 contacts →
	Indirect evidence “Die EWE WASSER GmbH mit Hauptsitz in Cuxhaven gehört über eine Mehrheitsbeteiligung der EWE-Tochter swb zum EWE-Konzern.” Source: RevenueBase Database · checked Sep 22, 2026
15	BTA International	Partial evidence	Pfaffenhofen/illm, GermanyHQ checked Sep 22, 2026	51-200	16 contacts →
	Partial evidence “Leading Specialist for the Wet Mechanical Pre-Treatment BTA International GmbH is the leading specialist for the wet mechanical pre-treatment of different kinds of waste and the…” Source: RevenueBase Database · checked Sep 22, 2026
16	Ecowest Verbund	Indirect evidence	Ennigerloh, GermanyHQ checked Sep 22, 2026	201-500	15 contacts →
	Indirect evidence “Mit über 250 Kolleg*innen sorgen wir im ECOWEST VERBUND tagtäglich für nachhaltige, umweltkonforme und verlässliche Abfallverwertung und -beseitigung in der Region.” Source: RevenueBase Database · checked Sep 22, 2026
17	Lambda Gesellschaft FÜR Klimaschutz UND Regenerative Energien MBH	Indirect evidence	Herten, GermanyHQ checked Sep 22, 2026	51-200	15 contacts →
	Indirect evidence “Als Dienstleister und Technologielieferant rund um aktive und stillgelegte Deponien leisten wir einen wichtigen Beitrag zur Entwicklung, Pflege und Erschließung der vom Menschen…” Source: RevenueBase Database · checked Sep 22, 2026
18	KLARO	Strong evidence	Bayreuth, GermanyHQ checked Sep 22, 2026	11-50	13 contacts →
	Strong evidence “KLARO is your specialist for small wastewater treatment plants up to 50 PE and bigger wastewater treatment symstems up to PE - Made in Germany Wherever a connection to the sewer…” Source: RevenueBase Database · checked Sep 22, 2026
19	Paulmichl Gmbh	Partial evidence	Leutkirch Im Allgäu, GermanyHQ checked Sep 22, 2026	51-200	12 contacts →
	Partial evidence “For the construction and expansion of biogas plants, we are a reliable supplier of components and offer extensive agitator, pumping and final storage technology.” Source: RevenueBase Database · checked Sep 22, 2026
20	Herhof Gmbh	Indirect evidence	Solms, GermanyHQ checked Sep 22, 2026	11-50	10 contacts →
	Indirect evidence “Die Firma Herhof ist seit Jahren auf dem Markt der Abfallentsorgung tätig.” Source: RevenueBase Database · checked Sep 22, 2026
21	Sauter Biogas Gmbh	Partial evidence	Klipphausen, GermanyHQ checked Sep 22, 2026	11-50	9 contacts →
	Partial evidence “Seit fast 20 Jahren sind wir Vorreiter in der Entwicklung innovativer Biogasanlagen und setzen mit unserem patentierten "Beregnen statt Rühren"-System neue Maßstäbe in der…” Source: RevenueBase Database · checked Sep 22, 2026
22	ZV RBB	Indirect evidence	Böblingen, GermanyHQ checked Sep 22, 2026	51-200	9 contacts →
	Indirect evidence “Durch die Errichtung einer hochinnovativen Klärschlammverwertungsanlage auf dem Gelände des bestehenden Restmüllheizkraftwerks in Böblingen setzen wir einen wegweisenden Schritt…” Source: RevenueBase Database · checked Sep 22, 2026
23	Stadtentwässerung Hildesheim, Kommunale Anstalt DES Öffentlichen Rechts Sehi	Indirect evidence	Hildesheim, GermanyHQ checked Sep 22, 2026	51-200	9 contacts →
	Indirect evidence “Wir sind die Stadtentwässerung Hildesheim AöR.” Source: RevenueBase Database · checked Sep 22, 2026
24	Rudolf Messner Umwelttechnik AG	Strong evidence	Adelsdorf, GermanyHQ checked Sep 22, 2026	11-50	9 contacts →
	Strong evidence “Efficiency and quality are among the most important features of modern aeration systems for biological wastewater treatment plants to operate them in an economically, ecologically…” Source: RevenueBase Database · checked Sep 22, 2026
25	ABO Kraft & Wärme Bioenergie Gmbh	Partial evidence	Wiesbaden, GermanyHQ checked Sep 22, 2026	11-50	7 contacts →
	Partial evidence “ABO Kraft & Wärme betreibt Biogasanlagen und verwertet organische Abfälle.” Source: RevenueBase Database · checked Sep 22, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: wastewater treatment biogas facilities. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names wastewater treatment biogas facilities.
Partial evidence: Its own public description names part of wastewater treatment biogas facilities, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name wastewater treatment biogas facilities. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 121 wastewater treatment biogas facilities based in Germany

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Wastewater treatment biogas facilities based in Germany at a glance

As of Sep 22, 2026

40.6%Verified-email coverage

14.3Average contacts per company

11-50Median size (employees)

1.7%Largest-city concentration · Berching

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 121 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among wastewater treatment biogas facilities, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Germany whose own description of what they do matches “wastewater treatment biogas facilities”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names wastewater treatment biogas facilities), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among wastewater treatment biogas facilities, and records with no verified work email. Companies headquartered outside Germany are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 702 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 22, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names wastewater treatment biogas facilities, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many wastewater treatment biogas facilities are there based in Germany?

RevenueBase identified 121 wastewater treatment biogas facilities headquartered in Germany as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

EEW Energy From Waste Gmbh, headquartered in Helmstedt, tops this list with the largest team on record.

Which city has the most wastewater treatment biogas facilities?

Berching leads with 2 headquartered companies, followed by Bielefeld (2) and Gera (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 702 verified decision-maker contacts tracked across these 121 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.